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Merge tag 'fs.vfsuid.ima.v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-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>
dca56c30 56#include <net/devlink.h>
1da177e4 57
6264f58c
JK		 58#include "dev.h"
59
a428afe8 60#define RTNL_MAX_TYPE 50
2dba407f 61#define RTNL_SLAVE_MAX_TYPE 40
ccf8dbcd 62
e0d087af 63struct rtnl_link {
e2849863
TG		 64 rtnl_doit_func doit;
65 rtnl_dumpit_func dumpit;
e4202511 66 struct module *owner;
62256f98 67 unsigned int flags;
addf9b90 68 struct rcu_head rcu;
e2849863
TG		 69};
70
6756ae4b 71static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 72
73void rtnl_lock(void)
74{
6756ae4b 75 mutex_lock(&rtnl_mutex);
1da177e4 76}
e0d087af 77EXPORT_SYMBOL(rtnl_lock);
1da177e4 78
79ffdfc6
KT		 79int rtnl_lock_killable(void)
80{
81 return mutex_lock_killable(&rtnl_mutex);
82}
83EXPORT_SYMBOL(rtnl_lock_killable);
84
1b5c5493
ED		 85static struct sk_buff *defer_kfree_skb_list;
86void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
87{
88 if (head && tail) {
89 tail->next = defer_kfree_skb_list;
90 defer_kfree_skb_list = head;
91 }
92}
93EXPORT_SYMBOL(rtnl_kfree_skbs);
94
6756ae4b 95void __rtnl_unlock(void)
1da177e4 96{
1b5c5493
ED		 97 struct sk_buff *head = defer_kfree_skb_list;
98
99 defer_kfree_skb_list = NULL;
100
0b5c21bb
JB		 101 /* Ensure that we didn't actually add any TODO item when __rtnl_unlock()
102 * is used. In some places, e.g. in cfg80211, we have code that will do
103 * something like
104 * rtnl_lock()
105 * wiphy_lock()
106 * ...
107 * rtnl_unlock()
108 *
109 * and because netdev_run_todo() acquires the RTNL for items on the list
110 * we could cause a situation such as this:
111 * Thread 1 Thread 2
112 * rtnl_lock()
113 * unregister_netdevice()
114 * __rtnl_unlock()
115 * rtnl_lock()
116 * wiphy_lock()
117 * rtnl_unlock()
118 * netdev_run_todo()
119 * __rtnl_unlock()
120 *
121 * // list not empty now
122 * // because of thread 2
123 * rtnl_lock()
124 * while (!list_empty(...))
125 * rtnl_lock()
126 * wiphy_lock()
127 * **** DEADLOCK ****
128 *
129 * However, usage of __rtnl_unlock() is rare, and so we can ensure that
130 * it's not used in cases where something is added to do the list.
131 */
132 WARN_ON(!list_empty(&net_todo_list));
133
6756ae4b 134 mutex_unlock(&rtnl_mutex);
1b5c5493
ED		 135
136 while (head) {
137 struct sk_buff *next = head->next;
138
139 kfree_skb(head);
140 cond_resched();
141 head = next;
142 }
1da177e4 143}
6756ae4b 144
1da177e4
LT		 145void rtnl_unlock(void)
146{
58ec3b4d 147 /* This fellow will unlock it for us. */
1da177e4
LT		 148 netdev_run_todo();
149}
e0d087af 150EXPORT_SYMBOL(rtnl_unlock);
1da177e4 151
6756ae4b
SH		 152int rtnl_trylock(void)
153{
154 return mutex_trylock(&rtnl_mutex);
155}
e0d087af 156EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 157
c9c1014b
PM		 158int rtnl_is_locked(void)
159{
160 return mutex_is_locked(&rtnl_mutex);
161}
e0d087af 162EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 163
6f99528e
VB		 164bool refcount_dec_and_rtnl_lock(refcount_t *r)
165{
166 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
167}
168EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
169
a898def2 170#ifdef CONFIG_PROVE_LOCKING
0cbf3343 171bool lockdep_rtnl_is_held(void)
a898def2
PM		 172{
173 return lockdep_is_held(&rtnl_mutex);
174}
175EXPORT_SYMBOL(lockdep_rtnl_is_held);
176#endif /* #ifdef CONFIG_PROVE_LOCKING */
177
51e13685 178static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 179
180static inline int rtm_msgindex(int msgtype)
181{
182 int msgindex = msgtype - RTM_BASE;
183
184 /*
185 * msgindex < 0 implies someone tried to register a netlink
186 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
187 * the message type has not been added to linux/rtnetlink.h
188 */
189 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
190
191 return msgindex;
192}
193
addf9b90
FW		 194static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
195{
51e13685 196 struct rtnl_link __rcu **tab;
addf9b90
FW		 197
198 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
199 protocol = PF_UNSPEC;
200
201 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
202 if (!tab)
203 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
204
51e13685 205 return rcu_dereference_rtnl(tab[msgtype]);
addf9b90
FW		 206}
207
e4202511
FW		 208static int rtnl_register_internal(struct module *owner,
209 int protocol, int msgtype,
210 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
211 unsigned int flags)
e2849863 212{
b0e9fe1b
FW		 213 struct rtnl_link *link, *old;
214 struct rtnl_link __rcu **tab;
e2849863 215 int msgindex;
addf9b90 216 int ret = -ENOBUFS;
e2849863 217
25239cee 218 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 219 msgindex = rtm_msgindex(msgtype);
220
addf9b90 221 rtnl_lock();
51e13685 222 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
e2849863 223 if (tab == NULL) {
addf9b90
FW		 224 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
225 if (!tab)
226 goto unlock;
e2849863 227
addf9b90 228 /* ensures we see the 0 stores */
6853dd48 229 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
e2849863
TG		 230 }
231
addf9b90
FW		 232 old = rtnl_dereference(tab[msgindex]);
233 if (old) {
234 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
235 if (!link)
236 goto unlock;
237 } else {
238 link = kzalloc(sizeof(*link), GFP_KERNEL);
239 if (!link)
240 goto unlock;
241 }
242
e4202511
FW		 243 WARN_ON(link->owner && link->owner != owner);
244 link->owner = owner;
245
addf9b90 246 WARN_ON(doit && link->doit && link->doit != doit);
e2849863 247 if (doit)
addf9b90
FW		 248 link->doit = doit;
249 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
e2849863 250 if (dumpit)
addf9b90 251 link->dumpit = dumpit;
e2849863 252
a6cec0bc
NA		 253 WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL &&
254 (flags & RTNL_FLAG_BULK_DEL_SUPPORTED));
addf9b90
FW		 255 link->flags |= flags;
256
257 /* publish protocol:msgtype */
258 rcu_assign_pointer(tab[msgindex], link);
259 ret = 0;
260 if (old)
261 kfree_rcu(old, rcu);
262unlock:
263 rtnl_unlock();
264 return ret;
e2849863 265}
e4202511
FW		 266
267/**
268 * rtnl_register_module - Register a rtnetlink message type
269 *
270 * @owner: module registering the hook (THIS_MODULE)
271 * @protocol: Protocol family or PF_UNSPEC
272 * @msgtype: rtnetlink message type
273 * @doit: Function pointer called for each request message
274 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
d467d0bc 275 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
e4202511
FW		 276 *
277 * Like rtnl_register, but for use by removable modules.
278 */
279int rtnl_register_module(struct module *owner,
280 int protocol, int msgtype,
281 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
282 unsigned int flags)
283{
284 return rtnl_register_internal(owner, protocol, msgtype,
285 doit, dumpit, flags);
286}
287EXPORT_SYMBOL_GPL(rtnl_register_module);
288
289/**
16feebcf 290 * rtnl_register - Register a rtnetlink message type
e4202511
FW		 291 * @protocol: Protocol family or PF_UNSPEC
292 * @msgtype: rtnetlink message type
293 * @doit: Function pointer called for each request message
294 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
d467d0bc 295 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
e4202511
FW		 296 *
297 * Registers the specified function pointers (at least one of them has
298 * to be non-NULL) to be called whenever a request message for the
299 * specified protocol family and message type is received.
300 *
301 * The special protocol family PF_UNSPEC may be used to define fallback
302 * function pointers for the case when no entry for the specific protocol
303 * family exists.
e2849863
TG		 304 */
305void rtnl_register(int protocol, int msgtype,
c7ac8679 306 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
b97bac64 307 unsigned int flags)
e2849863 308{
16feebcf
FW		 309 int err;
310
311 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
312 flags);
313 if (err)
314 pr_err("Unable to register rtnetlink message handler, "
315 "protocol = %d, message type = %d\n", protocol, msgtype);
e2849863 316}
e2849863
TG		 317
318/**
319 * rtnl_unregister - Unregister a rtnetlink message type
320 * @protocol: Protocol family or PF_UNSPEC
321 * @msgtype: rtnetlink message type
322 *
323 * Returns 0 on success or a negative error code.
324 */
325int rtnl_unregister(int protocol, int msgtype)
326{
51e13685
JK		 327 struct rtnl_link __rcu **tab;
328 struct rtnl_link *link;
e2849863
TG		 329 int msgindex;
330
25239cee 331 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 332 msgindex = rtm_msgindex(msgtype);
333
6853dd48 334 rtnl_lock();
addf9b90
FW		 335 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
336 if (!tab) {
6853dd48 337 rtnl_unlock();
e2849863 338 return -ENOENT;
6853dd48 339 }
e2849863 340
51e13685 341 link = rtnl_dereference(tab[msgindex]);
4fc29989 342 RCU_INIT_POINTER(tab[msgindex], NULL);
6853dd48 343 rtnl_unlock();
e2849863 344
addf9b90
FW		 345 kfree_rcu(link, rcu);
346
e2849863
TG		 347 return 0;
348}
e2849863
TG		 349EXPORT_SYMBOL_GPL(rtnl_unregister);
350
351/**
352 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
353 * @protocol : Protocol family or PF_UNSPEC
354 *
355 * Identical to calling rtnl_unregster() for all registered message types
356 * of a certain protocol family.
357 */
358void rtnl_unregister_all(int protocol)
359{
51e13685
JK		 360 struct rtnl_link __rcu **tab;
361 struct rtnl_link *link;
addf9b90 362 int msgindex;
019a3169 363
25239cee 364 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863 365
019a3169 366 rtnl_lock();
51e13685 367 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
f707ef61
SD		 368 if (!tab) {
369 rtnl_unlock();
370 return;
371 }
6853dd48 372 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
addf9b90 373 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
51e13685 374 link = rtnl_dereference(tab[msgindex]);
addf9b90
FW		 375 if (!link)
376 continue;
377
4fc29989 378 RCU_INIT_POINTER(tab[msgindex], NULL);
addf9b90
FW		 379 kfree_rcu(link, rcu);
380 }
019a3169
FW		 381 rtnl_unlock();
382
6853dd48
FW		 383 synchronize_net();
384
addf9b90 385 kfree(tab);
e2849863 386}
e2849863 387EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 388
38f7b870
PM		 389static LIST_HEAD(link_ops);
390
c63044f0
ED		 391static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
392{
393 const struct rtnl_link_ops *ops;
394
395 list_for_each_entry(ops, &link_ops, list) {
396 if (!strcmp(ops->kind, kind))
397 return ops;
398 }
399 return NULL;
400}
401
38f7b870
PM		 402/**
403 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
404 * @ops: struct rtnl_link_ops * to register
405 *
406 * The caller must hold the rtnl_mutex. This function should be used
407 * by drivers that create devices during module initialization. It
408 * must be called before registering the devices.
409 *
410 * Returns 0 on success or a negative error code.
411 */
412int __rtnl_link_register(struct rtnl_link_ops *ops)
413{
c63044f0
ED		 414 if (rtnl_link_ops_get(ops->kind))
415 return -EEXIST;
416
8c713dc9 417 /* The check for alloc/setup is here because if ops
b0ab2fab
JP		 418 * does not have that filled up, it is not possible
419 * to use the ops for creating device. So do not
420 * fill up dellink as well. That disables rtnl_dellink.
421 */
8c713dc9 422 if ((ops->alloc || ops->setup) && !ops->dellink)
23289a37 423 ops->dellink = unregister_netdevice_queue;
2d85cba2 424
38f7b870
PM		 425 list_add_tail(&ops->list, &link_ops);
426 return 0;
427}
38f7b870
PM		 428EXPORT_SYMBOL_GPL(__rtnl_link_register);
429
430/**
431 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
432 * @ops: struct rtnl_link_ops * to register
433 *
434 * Returns 0 on success or a negative error code.
435 */
436int rtnl_link_register(struct rtnl_link_ops *ops)
437{
438 int err;
439
ccf8dbcd
KC		 440 /* Sanity-check max sizes to avoid stack buffer overflow. */
441 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
442 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
443 return -EINVAL;
444
38f7b870
PM		 445 rtnl_lock();
446 err = __rtnl_link_register(ops);
447 rtnl_unlock();
448 return err;
449}
38f7b870
PM		 450EXPORT_SYMBOL_GPL(rtnl_link_register);
451
669f87ba
PE		 452static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
453{
454 struct net_device *dev;
23289a37
ED		 455 LIST_HEAD(list_kill);
456
669f87ba 457 for_each_netdev(net, dev) {
23289a37
ED		 458 if (dev->rtnl_link_ops == ops)
459 ops->dellink(dev, &list_kill);
669f87ba 460 }
23289a37 461 unregister_netdevice_many(&list_kill);
669f87ba
PE		 462}
463
38f7b870
PM		 464/**
465 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
466 * @ops: struct rtnl_link_ops * to unregister
467 *
554873e5
KT		 468 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
469 * integrity (hold pernet_ops_rwsem for writing to close the race
470 * with setup_net() and cleanup_net()).
38f7b870
PM		 471 */
472void __rtnl_link_unregister(struct rtnl_link_ops *ops)
473{
881d966b 474 struct net *net;
2d85cba2 475
881d966b 476 for_each_net(net) {
669f87ba 477 __rtnl_kill_links(net, ops);
2d85cba2 478 }
38f7b870
PM		 479 list_del(&ops->list);
480}
38f7b870
PM		 481EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
482
200b916f
CW		 483/* Return with the rtnl_lock held when there are no network
484 * devices unregistering in any network namespace.
485 */
486static void rtnl_lock_unregistering_all(void)
487{
488 struct net *net;
489 bool unregistering;
ff960a73 490 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 491
ff960a73 492 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 493 for (;;) {
200b916f
CW		 494 unregistering = false;
495 rtnl_lock();
f0b07bb1
KT		 496 /* We held write locked pernet_ops_rwsem, and parallel
497 * setup_net() and cleanup_net() are not possible.
498 */
200b916f 499 for_each_net(net) {
ede6c39c 500 if (atomic_read(&net->dev_unreg_count) > 0) {
200b916f
CW		 501 unregistering = true;
502 break;
503 }
504 }
505 if (!unregistering)
506 break;
507 __rtnl_unlock();
ff960a73
PZ		 508
509 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 510 }
ff960a73 511 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 512}
513
38f7b870
PM		 514/**
515 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
516 * @ops: struct rtnl_link_ops * to unregister
517 */
518void rtnl_link_unregister(struct rtnl_link_ops *ops)
519{
8518e9bb 520 /* Close the race with setup_net() and cleanup_net() */
4420bf21 521 down_write(&pernet_ops_rwsem);
200b916f 522 rtnl_lock_unregistering_all();
38f7b870
PM		 523 __rtnl_link_unregister(ops);
524 rtnl_unlock();
4420bf21 525 up_write(&pernet_ops_rwsem);
38f7b870 526}
38f7b870
PM		 527EXPORT_SYMBOL_GPL(rtnl_link_unregister);
528
ba7d49b1
JP		 529static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
530{
531 struct net_device *master_dev;
532 const struct rtnl_link_ops *ops;
8515ae38 533 size_t size = 0;
ba7d49b1 534
8515ae38
FW		 535 rcu_read_lock();
536
537 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
ba7d49b1 538 if (!master_dev)
8515ae38
FW		 539 goto out;
540
ba7d49b1 541 ops = master_dev->rtnl_link_ops;
6049f253 542 if (!ops || !ops->get_slave_size)
8515ae38 543 goto out;
ba7d49b1 544 /* IFLA_INFO_SLAVE_DATA + nested data */
8515ae38 545 size = nla_total_size(sizeof(struct nlattr)) +
ba7d49b1 546 ops->get_slave_size(master_dev, dev);
8515ae38
FW		 547
548out:
549 rcu_read_unlock();
550 return size;
ba7d49b1
JP		 551}
552
38f7b870
PM		 553static size_t rtnl_link_get_size(const struct net_device *dev)
554{
555 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
556 size_t size;
557
558 if (!ops)
559 return 0;
560
369cf77a
TG		 561 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
562 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 563
564 if (ops->get_size)
565 /* IFLA_INFO_DATA + nested data */
369cf77a 566 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 567 ops->get_size(dev);
568
569 if (ops->get_xstats_size)
369cf77a
TG		 570 /* IFLA_INFO_XSTATS */
571 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 572
ba7d49b1
JP		 573 size += rtnl_link_get_slave_info_data_size(dev);
574
38f7b870
PM		 575 return size;
576}
577
f8ff182c
TG		 578static LIST_HEAD(rtnl_af_ops);
579
580static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
581{
582 const struct rtnl_af_ops *ops;
583
a100243d
CW		 584 ASSERT_RTNL();
585
586 list_for_each_entry(ops, &rtnl_af_ops, list) {
f8ff182c
TG		 587 if (ops->family == family)
588 return ops;
589 }
590
591 return NULL;
592}
593
f8ff182c
TG		 594/**
595 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
596 * @ops: struct rtnl_af_ops * to register
597 *
598 * Returns 0 on success or a negative error code.
599 */
3678a9d8 600void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 601{
f8ff182c 602 rtnl_lock();
5fa85a09 603 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
f8ff182c 604 rtnl_unlock();
f8ff182c
TG		 605}
606EXPORT_SYMBOL_GPL(rtnl_af_register);
607
f8ff182c
TG		 608/**
609 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
610 * @ops: struct rtnl_af_ops * to unregister
611 */
612void rtnl_af_unregister(struct rtnl_af_ops *ops)
613{
614 rtnl_lock();
5fa85a09 615 list_del_rcu(&ops->list);
f8ff182c 616 rtnl_unlock();
5fa85a09
FW		 617
618 synchronize_rcu();
f8ff182c
TG		 619}
620EXPORT_SYMBOL_GPL(rtnl_af_unregister);
621
b1974ed0
AR		 622static size_t rtnl_link_get_af_size(const struct net_device *dev,
623 u32 ext_filter_mask)
f8ff182c
TG		 624{
625 struct rtnl_af_ops *af_ops;
626 size_t size;
627
628 /* IFLA_AF_SPEC */
629 size = nla_total_size(sizeof(struct nlattr));
630
5fa85a09
FW		 631 rcu_read_lock();
632 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
f8ff182c
TG		 633 if (af_ops->get_link_af_size) {
634 /* AF_* + nested data */
635 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 636 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 637 }
638 }
5fa85a09 639 rcu_read_unlock();
f8ff182c
TG		 640
641 return size;
642}
643
ba7d49b1 644static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 645{
ba7d49b1 646 struct net_device *master_dev;
4c82a95e 647 bool ret = false;
38f7b870 648
4c82a95e
FW		 649 rcu_read_lock();
650
651 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
813f020c 652 if (master_dev && master_dev->rtnl_link_ops)
4c82a95e
FW		 653 ret = true;
654 rcu_read_unlock();
655 return ret;
ba7d49b1
JP		 656}
657
658static int rtnl_link_slave_info_fill(struct sk_buff *skb,
659 const struct net_device *dev)
660{
661 struct net_device *master_dev;
662 const struct rtnl_link_ops *ops;
663 struct nlattr *slave_data;
664 int err;
38f7b870 665
ba7d49b1
JP		 666 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
667 if (!master_dev)
668 return 0;
669 ops = master_dev->rtnl_link_ops;
670 if (!ops)
671 return 0;
672 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
673 return -EMSGSIZE;
674 if (ops->fill_slave_info) {
ae0be8de 675 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
ba7d49b1
JP		 676 if (!slave_data)
677 return -EMSGSIZE;
678 err = ops->fill_slave_info(skb, master_dev, dev);
679 if (err < 0)
680 goto err_cancel_slave_data;
681 nla_nest_end(skb, slave_data);
682 }
683 return 0;
684
685err_cancel_slave_data:
686 nla_nest_cancel(skb, slave_data);
687 return err;
688}
689
690static int rtnl_link_info_fill(struct sk_buff *skb,
691 const struct net_device *dev)
692{
693 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
694 struct nlattr *data;
695 int err;
696
697 if (!ops)
698 return 0;
38f7b870 699 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 700 return -EMSGSIZE;
38f7b870
PM		 701 if (ops->fill_xstats) {
702 err = ops->fill_xstats(skb, dev);
703 if (err < 0)
ba7d49b1 704 return err;
38f7b870
PM		 705 }
706 if (ops->fill_info) {
ae0be8de 707 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 708 if (data == NULL)
709 return -EMSGSIZE;
38f7b870
PM		 710 err = ops->fill_info(skb, dev);
711 if (err < 0)
712 goto err_cancel_data;
713 nla_nest_end(skb, data);
714 }
38f7b870
PM		 715 return 0;
716
717err_cancel_data:
718 nla_nest_cancel(skb, data);
ba7d49b1
JP		 719 return err;
720}
721
722static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
723{
724 struct nlattr *linkinfo;
725 int err = -EMSGSIZE;
726
ae0be8de 727 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
ba7d49b1
JP		 728 if (linkinfo == NULL)
729 goto out;
730
731 err = rtnl_link_info_fill(skb, dev);
732 if (err < 0)
733 goto err_cancel_link;
734
735 err = rtnl_link_slave_info_fill(skb, dev);
736 if (err < 0)
737 goto err_cancel_link;
738
739 nla_nest_end(skb, linkinfo);
740 return 0;
741
38f7b870
PM		 742err_cancel_link:
743 nla_nest_cancel(skb, linkinfo);
744out:
745 return err;
746}
747
95c96174 748int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 749{
97c53cac 750 struct sock *rtnl = net->rtnl;
cfdf0d9a
YD		 751
752 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL);
1da177e4
LT		 753}
754
97c53cac 755int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 756{
97c53cac
DL		 757 struct sock *rtnl = net->rtnl;
758
2942e900
TG		 759 return nlmsg_unicast(rtnl, skb, pid);
760}
e0d087af 761EXPORT_SYMBOL(rtnl_unicast);
2942e900 762
1ce85fe4 763void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
1d997f10 764 const struct nlmsghdr *nlh, gfp_t flags)
97676b6b 765{
97c53cac 766 struct sock *rtnl = net->rtnl;
97676b6b 767
f9b282b3 768 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags);
97676b6b 769}
e0d087af 770EXPORT_SYMBOL(rtnl_notify);
97676b6b 771
97c53cac 772void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 773{
97c53cac
DL		 774 struct sock *rtnl = net->rtnl;
775
97676b6b
TG		 776 netlink_set_err(rtnl, 0, group, error);
777}
e0d087af 778EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 779
1da177e4
LT		 780int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
781{
2d7202bf
TG		 782 struct nlattr *mx;
783 int i, valid = 0;
784
c22a133a
DA		 785 /* nothing is dumped for dst_default_metrics, so just skip the loop */
786 if (metrics == dst_default_metrics.metrics)
787 return 0;
788
ae0be8de 789 mx = nla_nest_start_noflag(skb, RTA_METRICS);
2d7202bf
TG		 790 if (mx == NULL)
791 return -ENOBUFS;
792
793 for (i = 0; i < RTAX_MAX; i++) {
794 if (metrics[i]) {
ea697639
DB		 795 if (i == RTAX_CC_ALGO - 1) {
796 char tmp[TCP_CA_NAME_MAX], *name;
797
798 name = tcp_ca_get_name_by_key(metrics[i], tmp);
799 if (!name)
800 continue;
801 if (nla_put_string(skb, i + 1, name))
802 goto nla_put_failure;
c3a8d947
DB		 803 } else if (i == RTAX_FEATURES - 1) {
804 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
805
f8edcd12
PS		 806 if (!user_features)
807 continue;
c3a8d947
DB		 808 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
809 if (nla_put_u32(skb, i + 1, user_features))
810 goto nla_put_failure;
ea697639
DB		 811 } else {
812 if (nla_put_u32(skb, i + 1, metrics[i]))
813 goto nla_put_failure;
814 }
2d7202bf 815 valid++;
2d7202bf 816 }
1da177e4 817 }
1da177e4 818
a57d27fc
DM		 819 if (!valid) {
820 nla_nest_cancel(skb, mx);
821 return 0;
822 }
2d7202bf
TG		 823
824 return nla_nest_end(skb, mx);
825
826nla_put_failure:
bc3ed28c
TG		 827 nla_nest_cancel(skb, mx);
828 return -EMSGSIZE;
1da177e4 829}
e0d087af 830EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 831
e3703b3d 832int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 833 long expires, u32 error)
e3703b3d
TG		 834{
835 struct rta_cacheinfo ci = {
e3703b3d
TG		 836 .rta_error = error,
837 .rta_id = id,
e3703b3d
TG		 838 };
839
3940746d
DA		 840 if (dst) {
841 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
842 ci.rta_used = dst->__use;
843 ci.rta_clntref = atomic_read(&dst->__refcnt);
844 }
8253947e
LW		 845 if (expires) {
846 unsigned long clock;
e3703b3d 847
8253947e
LW		 848 clock = jiffies_to_clock_t(abs(expires));
849 clock = min_t(unsigned long, clock, INT_MAX);
850 ci.rta_expires = (expires > 0) ? clock : -clock;
851 }
e3703b3d
TG		 852 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
853}
e3703b3d 854EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 855
93b2d4a2 856static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 857{
858 unsigned char operstate = dev->operstate;
859
e0d087af 860 switch (transition) {
b00055aa
SR		 861 case IF_OPER_UP:
862 if ((operstate == IF_OPER_DORMANT ||
eec517cd 863 operstate == IF_OPER_TESTING ||
b00055aa 864 operstate == IF_OPER_UNKNOWN) &&
eec517cd 865 !netif_dormant(dev) && !netif_testing(dev))
b00055aa
SR		 866 operstate = IF_OPER_UP;
867 break;
868
eec517cd 869 case IF_OPER_TESTING:
abbc7928 870 if (netif_oper_up(dev))
eec517cd
AL		 871 operstate = IF_OPER_TESTING;
872 break;
873
b00055aa 874 case IF_OPER_DORMANT:
abbc7928 875 if (netif_oper_up(dev))
b00055aa
SR		 876 operstate = IF_OPER_DORMANT;
877 break;
3ff50b79 878 }
b00055aa
SR		 879
880 if (dev->operstate != operstate) {
fd888e85 881 write_lock(&dev_base_lock);
b00055aa 882 dev->operstate = operstate;
fd888e85 883 write_unlock(&dev_base_lock);
93b2d4a2
DM		 884 netdev_state_change(dev);
885 }
b00055aa
SR		 886}
887
b1beb681
JB		 888static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
889{
890 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
891 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
892}
893
3729d502
PM		 894static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
895 const struct ifinfomsg *ifm)
896{
897 unsigned int flags = ifm->ifi_flags;
898
899 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
900 if (ifm->ifi_change)
901 flags = (flags & ifm->ifi_change) |
b1beb681 902 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 903
904 return flags;
905}
906
b60c5115 907static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 908 const struct rtnl_link_stats64 *b)
1da177e4 909{
b60c5115
TG		 910 a->rx_packets = b->rx_packets;
911 a->tx_packets = b->tx_packets;
912 a->rx_bytes = b->rx_bytes;
913 a->tx_bytes = b->tx_bytes;
914 a->rx_errors = b->rx_errors;
915 a->tx_errors = b->tx_errors;
916 a->rx_dropped = b->rx_dropped;
917 a->tx_dropped = b->tx_dropped;
918
919 a->multicast = b->multicast;
920 a->collisions = b->collisions;
921
922 a->rx_length_errors = b->rx_length_errors;
923 a->rx_over_errors = b->rx_over_errors;
924 a->rx_crc_errors = b->rx_crc_errors;
925 a->rx_frame_errors = b->rx_frame_errors;
926 a->rx_fifo_errors = b->rx_fifo_errors;
927 a->rx_missed_errors = b->rx_missed_errors;
928
929 a->tx_aborted_errors = b->tx_aborted_errors;
930 a->tx_carrier_errors = b->tx_carrier_errors;
931 a->tx_fifo_errors = b->tx_fifo_errors;
932 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
933 a->tx_window_errors = b->tx_window_errors;
934
935 a->rx_compressed = b->rx_compressed;
936 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 937
938 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 939}
940
c02db8c6 941/* All VF info */
115c9b81
GR		 942static inline int rtnl_vfinfo_size(const struct net_device *dev,
943 u32 ext_filter_mask)
ebc08a6f 944{
9af15c38 945 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 946 int num_vfs = dev_num_vf(dev->dev.parent);
7e75f74a 947 size_t size = nla_total_size(0);
045de01a 948 size += num_vfs *
7e75f74a
SD		 949 (nla_total_size(0) +
950 nla_total_size(sizeof(struct ifla_vf_mac)) +
75345f88 951 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
7e75f74a
SD		 952 nla_total_size(sizeof(struct ifla_vf_vlan)) +
953 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
79aab093
MS		 954 nla_total_size(MAX_VLAN_LIST_LEN *
955 sizeof(struct ifla_vf_vlan_info)) +
ed616689 956 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
7e75f74a 957 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
945a3676 958 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 959 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8 960 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
7e75f74a 961 nla_total_size(0) + /* nest IFLA_VF_STATS */
3b766cd8 962 /* IFLA_VF_STATS_RX_PACKETS */
343a6d8e 963 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 964 /* IFLA_VF_STATS_TX_PACKETS */
343a6d8e 965 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 966 /* IFLA_VF_STATS_RX_BYTES */
343a6d8e 967 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 968 /* IFLA_VF_STATS_TX_BYTES */
343a6d8e 969 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 970 /* IFLA_VF_STATS_BROADCAST */
343a6d8e 971 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 972 /* IFLA_VF_STATS_MULTICAST */
343a6d8e 973 nla_total_size_64bit(sizeof(__u64)) +
c5a9f6f0
EE		 974 /* IFLA_VF_STATS_RX_DROPPED */
975 nla_total_size_64bit(sizeof(__u64)) +
976 /* IFLA_VF_STATS_TX_DROPPED */
977 nla_total_size_64bit(sizeof(__u64)) +
dd461d6a 978 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 979 return size;
980 } else
ebc08a6f
WM		 981 return 0;
982}
983
c53864fd
DG		 984static size_t rtnl_port_size(const struct net_device *dev,
985 u32 ext_filter_mask)
57b61080
SF		 986{
987 size_t port_size = nla_total_size(4) /* PORT_VF */
988 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
57b61080
SF		 989 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
990 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
991 + nla_total_size(1) /* PROT_VDP_REQUEST */
992 + nla_total_size(2); /* PORT_VDP_RESPONSE */
993 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
994 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
995 + port_size;
996 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
997 + port_size;
998
c53864fd
DG		 999 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1000 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1001 return 0;
1002 if (dev_num_vf(dev->dev.parent))
1003 return port_self_size + vf_ports_size +
1004 vf_port_size * dev_num_vf(dev->dev.parent);
1005 else
1006 return port_self_size;
1007}
1008
b5cdae32 1009static size_t rtnl_xdp_size(void)
d1fdd913 1010{
b3cfaa31 1011 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
58038695 1012 nla_total_size(1) + /* XDP_ATTACHED */
a25717d2 1013 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
4f91da26 1014 nla_total_size(4); /* XDP_<mode>_PROG_ID */
d1fdd913 1015
b5cdae32 1016 return xdp_size;
d1fdd913
BB		 1017}
1018
88f4fb0c
JP		 1019static size_t rtnl_prop_list_size(const struct net_device *dev)
1020{
1021 struct netdev_name_node *name_node;
1022 size_t size;
1023
1024 if (list_empty(&dev->name_node->list))
1025 return 0;
1026 size = nla_total_size(0);
1027 list_for_each_entry(name_node, &dev->name_node->list, list)
1028 size += nla_total_size(ALTIFNAMSIZ);
1029 return size;
1030}
1031
829eb208
RP		 1032static size_t rtnl_proto_down_size(const struct net_device *dev)
1033{
1034 size_t size = nla_total_size(1);
1035
1036 if (dev->proto_down_reason)
1037 size += nla_total_size(0) + nla_total_size(4);
1038
1039 return size;
1040}
1041
dca56c30
JP		 1042static size_t rtnl_devlink_port_size(const struct net_device *dev)
1043{
1044 size_t size = nla_total_size(0); /* nest IFLA_DEVLINK_PORT */
1045
1046 if (dev->devlink_port)
1047 size += devlink_nl_port_handle_size(dev->devlink_port);
1048
1049 return size;
1050}
1051
115c9b81
GR		 1052static noinline size_t if_nlmsg_size(const struct net_device *dev,
1053 u32 ext_filter_mask)
339bf98f
TG		 1054{
1055 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1056 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 1057 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 1058 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 1059 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 1060 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 1061 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 1062 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1063 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1064 + nla_total_size(4) /* IFLA_TXQLEN */
1065 + nla_total_size(4) /* IFLA_WEIGHT */
1066 + nla_total_size(4) /* IFLA_MTU */
1067 + nla_total_size(4) /* IFLA_LINK */
1068 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 1069 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 1070 + nla_total_size(4) /* IFLA_PROMISCUITY */
7e6e1b57 1071 + nla_total_size(4) /* IFLA_ALLMULTI */
76ff5cc9
JP		 1072 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1073 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
6919756c
TK		 1074 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1075 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
eac1b93c 1076 + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */
89527be8
ED		 1077 + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */
1078 + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */
339bf98f 1079 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 1080 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 1081 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 1082 + nla_total_size(4) /* IFLA_LINK_NETNSID */
db833d40 1083 + nla_total_size(4) /* IFLA_GROUP */
115c9b81
GR		 1084 + nla_total_size(ext_filter_mask
1085 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1086 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 1087 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 1088 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 1089 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 1090 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 1091 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 1092 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
b5cdae32 1093 + rtnl_xdp_size() /* IFLA_XDP */
3d3ea5af 1094 + nla_total_size(4) /* IFLA_EVENT */
6621dd29 1095 + nla_total_size(4) /* IFLA_NEW_NETNSID */
38e01b30 1096 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
829eb208 1097 + rtnl_proto_down_size(dev) /* proto down */
7e4a8d5a 1098 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
b2d3bcfa
DD		 1099 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1100 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
3e7a50ce
SH		 1101 + nla_total_size(4) /* IFLA_MIN_MTU */
1102 + nla_total_size(4) /* IFLA_MAX_MTU */
88f4fb0c 1103 + rtnl_prop_list_size(dev)
f74877a5 1104 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
dca56c30 1105 + rtnl_devlink_port_size(dev)
79e1ad14 1106 + 0;
339bf98f
TG		 1107}
1108
57b61080
SF		 1109static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1110{
1111 struct nlattr *vf_ports;
1112 struct nlattr *vf_port;
1113 int vf;
1114 int err;
1115
ae0be8de 1116 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
57b61080
SF		 1117 if (!vf_ports)
1118 return -EMSGSIZE;
1119
1120 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
ae0be8de 1121 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
8ca94183
SF		 1122 if (!vf_port)
1123 goto nla_put_failure;
a6574349
DM		 1124 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1125 goto nla_put_failure;
57b61080 1126 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 1127 if (err == -EMSGSIZE)
1128 goto nla_put_failure;
57b61080 1129 if (err) {
57b61080
SF		 1130 nla_nest_cancel(skb, vf_port);
1131 continue;
1132 }
1133 nla_nest_end(skb, vf_port);
1134 }
1135
1136 nla_nest_end(skb, vf_ports);
1137
1138 return 0;
8ca94183
SF		 1139
1140nla_put_failure:
1141 nla_nest_cancel(skb, vf_ports);
1142 return -EMSGSIZE;
57b61080
SF		 1143}
1144
1145static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1146{
1147 struct nlattr *port_self;
1148 int err;
1149
ae0be8de 1150 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
57b61080
SF		 1151 if (!port_self)
1152 return -EMSGSIZE;
1153
1154 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1155 if (err) {
1156 nla_nest_cancel(skb, port_self);
8ca94183 1157 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 1158 }
1159
1160 nla_nest_end(skb, port_self);
1161
1162 return 0;
1163}
1164
c53864fd
DG		 1165static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1166 u32 ext_filter_mask)
57b61080
SF		 1167{
1168 int err;
1169
c53864fd
DG		 1170 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1171 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1172 return 0;
1173
1174 err = rtnl_port_self_fill(skb, dev);
1175 if (err)
1176 return err;
1177
1178 if (dev_num_vf(dev->dev.parent)) {
1179 err = rtnl_vf_ports_fill(skb, dev);
1180 if (err)
1181 return err;
1182 }
1183
1184 return 0;
1185}
1186
66cae9ed
JP		 1187static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1188{
1189 int err;
02637fce 1190 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1191
1192 err = dev_get_phys_port_id(dev, &ppid);
1193 if (err) {
1194 if (err == -EOPNOTSUPP)
1195 return 0;
1196 return err;
1197 }
1198
1199 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1200 return -EMSGSIZE;
1201
1202 return 0;
1203}
1204
db24a904
DA		 1205static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1206{
1207 char name[IFNAMSIZ];
1208 int err;
1209
1210 err = dev_get_phys_port_name(dev, name, sizeof(name));
1211 if (err) {
1212 if (err == -EOPNOTSUPP)
1213 return 0;
1214 return err;
1215 }
1216
77ef033b 1217 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
db24a904
DA		 1218 return -EMSGSIZE;
1219
1220 return 0;
1221}
1222
82f28412
JP		 1223static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1224{
bccb3025 1225 struct netdev_phys_item_id ppid = { };
82f28412 1226 int err;
82f28412 1227
bccb3025 1228 err = dev_get_port_parent_id(dev, &ppid, false);
82f28412
JP		 1229 if (err) {
1230 if (err == -EOPNOTSUPP)
1231 return 0;
1232 return err;
1233 }
1234
bccb3025 1235 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
82f28412
JP		 1236 return -EMSGSIZE;
1237
1238 return 0;
1239}
1240
b22b941b
HFS		 1241static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1242 struct net_device *dev)
1243{
550bce59 1244 struct rtnl_link_stats64 *sp;
b22b941b 1245 struct nlattr *attr;
18402843 1246
58414d32
ND		 1247 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1248 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1249 if (!attr)
1250 return -EMSGSIZE;
1251
550bce59
RP		 1252 sp = nla_data(attr);
1253 dev_get_stats(dev, sp);
b22b941b 1254
550bce59
RP		 1255 attr = nla_reserve(skb, IFLA_STATS,
1256 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1257 if (!attr)
1258 return -EMSGSIZE;
1259
550bce59 1260 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1261
1262 return 0;
1263}
1264
1265static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1266 struct net_device *dev,
1267 int vfs_num,
1268 struct nlattr *vfinfo)
1269{
1270 struct ifla_vf_rss_query_en vf_rss_query_en;
79aab093 1271 struct nlattr *vf, *vfstats, *vfvlanlist;
b22b941b 1272 struct ifla_vf_link_state vf_linkstate;
79aab093 1273 struct ifla_vf_vlan_info vf_vlan_info;
b22b941b
HFS		 1274 struct ifla_vf_spoofchk vf_spoofchk;
1275 struct ifla_vf_tx_rate vf_tx_rate;
1276 struct ifla_vf_stats vf_stats;
1277 struct ifla_vf_trust vf_trust;
1278 struct ifla_vf_vlan vf_vlan;
1279 struct ifla_vf_rate vf_rate;
b22b941b 1280 struct ifla_vf_mac vf_mac;
75345f88 1281 struct ifla_vf_broadcast vf_broadcast;
b22b941b 1282 struct ifla_vf_info ivi;
30aad417
DG		 1283 struct ifla_vf_guid node_guid;
1284 struct ifla_vf_guid port_guid;
b22b941b 1285
0eed9cf5
MY		 1286 memset(&ivi, 0, sizeof(ivi));
1287
b22b941b
HFS		 1288 /* Not all SR-IOV capable drivers support the
1289 * spoofcheck and "RSS query enable" query. Preset to
1290 * -1 so the user space tool can detect that the driver
1291 * didn't report anything.
1292 */
1293 ivi.spoofchk = -1;
1294 ivi.rss_query_en = -1;
1295 ivi.trusted = -1;
b22b941b
HFS		 1296 /* The default value for VF link state is "auto"
1297 * IFLA_VF_LINK_STATE_AUTO which equals zero
1298 */
1299 ivi.linkstate = 0;
79aab093
MS		 1300 /* VLAN Protocol by default is 802.1Q */
1301 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1302 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1303 return 0;
1304
775f4f05 1305 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
9fbf082f
LR		 1306 memset(&node_guid, 0, sizeof(node_guid));
1307 memset(&port_guid, 0, sizeof(port_guid));
775f4f05 1308
b22b941b
HFS		 1309 vf_mac.vf =
1310 vf_vlan.vf =
79aab093 1311 vf_vlan_info.vf =
b22b941b
HFS		 1312 vf_rate.vf =
1313 vf_tx_rate.vf =
1314 vf_spoofchk.vf =
1315 vf_linkstate.vf =
1316 vf_rss_query_en.vf =
9aed6ae0
DG		 1317 vf_trust.vf =
1318 node_guid.vf =
1319 port_guid.vf = ivi.vf;
b22b941b
HFS		 1320
1321 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
75345f88 1322 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
b22b941b
HFS		 1323 vf_vlan.vlan = ivi.vlan;
1324 vf_vlan.qos = ivi.qos;
79aab093
MS		 1325 vf_vlan_info.vlan = ivi.vlan;
1326 vf_vlan_info.qos = ivi.qos;
1327 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1328 vf_tx_rate.rate = ivi.max_tx_rate;
1329 vf_rate.min_tx_rate = ivi.min_tx_rate;
1330 vf_rate.max_tx_rate = ivi.max_tx_rate;
1331 vf_spoofchk.setting = ivi.spoofchk;
1332 vf_linkstate.link_state = ivi.linkstate;
1333 vf_rss_query_en.setting = ivi.rss_query_en;
1334 vf_trust.setting = ivi.trusted;
ae0be8de 1335 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
79aab093
MS		 1336 if (!vf)
1337 goto nla_put_vfinfo_failure;
b22b941b 1338 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
75345f88 1339 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
b22b941b
HFS		 1340 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1341 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1342 &vf_rate) ||
1343 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1344 &vf_tx_rate) ||
1345 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1346 &vf_spoofchk) ||
1347 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1348 &vf_linkstate) ||
1349 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1350 sizeof(vf_rss_query_en),
1351 &vf_rss_query_en) ||
1352 nla_put(skb, IFLA_VF_TRUST,
1353 sizeof(vf_trust), &vf_trust))
79aab093 1354 goto nla_put_vf_failure;
30aad417 1355
30aad417
DG		 1356 if (dev->netdev_ops->ndo_get_vf_guid &&
1357 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1358 &port_guid)) {
1359 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1360 &node_guid) ||
1361 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1362 &port_guid))
1363 goto nla_put_vf_failure;
1364 }
ae0be8de 1365 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
79aab093
MS		 1366 if (!vfvlanlist)
1367 goto nla_put_vf_failure;
1368 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1369 &vf_vlan_info)) {
1370 nla_nest_cancel(skb, vfvlanlist);
1371 goto nla_put_vf_failure;
1372 }
1373 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1374 memset(&vf_stats, 0, sizeof(vf_stats));
1375 if (dev->netdev_ops->ndo_get_vf_stats)
1376 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1377 &vf_stats);
ae0be8de 1378 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
79aab093
MS		 1379 if (!vfstats)
1380 goto nla_put_vf_failure;
343a6d8e
ND		 1381 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1382 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1383 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1384 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1385 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1386 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1387 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1388 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1389 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1390 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1391 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
c5a9f6f0
EE		 1392 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1393 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1394 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1395 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1396 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
79aab093
MS		 1397 nla_nest_cancel(skb, vfstats);
1398 goto nla_put_vf_failure;
1399 }
b22b941b
HFS		 1400 nla_nest_end(skb, vfstats);
1401 nla_nest_end(skb, vf);
1402 return 0;
79aab093
MS		 1403
1404nla_put_vf_failure:
1405 nla_nest_cancel(skb, vf);
1406nla_put_vfinfo_failure:
1407 nla_nest_cancel(skb, vfinfo);
1408 return -EMSGSIZE;
b22b941b
HFS		 1409}
1410
250fc3df
FW		 1411static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1412 struct net_device *dev,
1413 u32 ext_filter_mask)
1414{
1415 struct nlattr *vfinfo;
1416 int i, num_vfs;
1417
1418 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1419 return 0;
1420
1421 num_vfs = dev_num_vf(dev->dev.parent);
1422 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1423 return -EMSGSIZE;
1424
1425 if (!dev->netdev_ops->ndo_get_vf_config)
1426 return 0;
1427
ae0be8de 1428 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
250fc3df
FW		 1429 if (!vfinfo)
1430 return -EMSGSIZE;
1431
1432 for (i = 0; i < num_vfs; i++) {
1433 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1434 return -EMSGSIZE;
1435 }
1436
1437 nla_nest_end(skb, vfinfo);
1438 return 0;
1439}
1440
b22b941b
HFS		 1441static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1442{
5f8e4474
KL		 1443 struct rtnl_link_ifmap map;
1444
1445 memset(&map, 0, sizeof(map));
1446 map.mem_start = dev->mem_start;
1447 map.mem_end = dev->mem_end;
1448 map.base_addr = dev->base_addr;
1449 map.irq = dev->irq;
1450 map.dma = dev->dma;
1451 map.port = dev->if_port;
1452
270cb4d0 1453 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1454 return -EMSGSIZE;
1455
1456 return 0;
1457}
1458
a25717d2 1459static u32 rtnl_xdp_prog_skb(struct net_device *dev)
d67b9cd2 1460{
58038695 1461 const struct bpf_prog *generic_xdp_prog;
d67b9cd2
DB		 1462
1463 ASSERT_RTNL();
1464
58038695 1465 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
a25717d2
JK		 1466 if (!generic_xdp_prog)
1467 return 0;
1468 return generic_xdp_prog->aux->id;
1469}
d67b9cd2 1470
a25717d2
JK		 1471static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1472{
7f0a8382 1473 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
a25717d2 1474}
118b4aa2 1475
a25717d2
JK		 1476static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1477{
7f0a8382 1478 return dev_xdp_prog_id(dev, XDP_MODE_HW);
a25717d2
JK		 1479}
1480
1481static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1482 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1483 u32 (*get_prog_id)(struct net_device *dev))
1484{
1485 u32 curr_id;
1486 int err;
1487
1488 curr_id = get_prog_id(dev);
1489 if (!curr_id)
1490 return 0;
1491
1492 *prog_id = curr_id;
1493 err = nla_put_u32(skb, attr, curr_id);
1494 if (err)
1495 return err;
d67b9cd2 1496
a25717d2
JK		 1497 if (*mode != XDP_ATTACHED_NONE)
1498 *mode = XDP_ATTACHED_MULTI;
1499 else
1500 *mode = tgt_mode;
118b4aa2 1501
a25717d2 1502 return 0;
d67b9cd2
DB		 1503}
1504
d1fdd913
BB		 1505static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1506{
d1fdd913 1507 struct nlattr *xdp;
58038695 1508 u32 prog_id;
d1fdd913 1509 int err;
4f91da26 1510 u8 mode;
d1fdd913 1511
ae0be8de 1512 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
d1fdd913
BB		 1513 if (!xdp)
1514 return -EMSGSIZE;
d67b9cd2 1515
a25717d2
JK		 1516 prog_id = 0;
1517 mode = XDP_ATTACHED_NONE;
202aabe8
JK		 1518 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1519 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1520 if (err)
a25717d2 1521 goto err_cancel;
202aabe8
JK		 1522 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1523 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1524 if (err)
a25717d2 1525 goto err_cancel;
202aabe8
JK		 1526 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1527 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1528 if (err)
a25717d2
JK		 1529 goto err_cancel;
1530
4f91da26 1531 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
d1fdd913
BB		 1532 if (err)
1533 goto err_cancel;
1534
a25717d2 1535 if (prog_id && mode != XDP_ATTACHED_MULTI) {
58038695
MKL		 1536 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1537 if (err)
1538 goto err_cancel;
1539 }
1540
d1fdd913
BB		 1541 nla_nest_end(skb, xdp);
1542 return 0;
1543
1544err_cancel:
1545 nla_nest_cancel(skb, xdp);
1546 return err;
1547}
1548
3d3ea5af
VY		 1549static u32 rtnl_get_event(unsigned long event)
1550{
1551 u32 rtnl_event_type = IFLA_EVENT_NONE;
1552
1553 switch (event) {
1554 case NETDEV_REBOOT:
1555 rtnl_event_type = IFLA_EVENT_REBOOT;
1556 break;
1557 case NETDEV_FEAT_CHANGE:
1558 rtnl_event_type = IFLA_EVENT_FEATURES;
1559 break;
1560 case NETDEV_BONDING_FAILOVER:
1561 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1562 break;
1563 case NETDEV_NOTIFY_PEERS:
1564 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1565 break;
1566 case NETDEV_RESEND_IGMP:
1567 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1568 break;
1569 case NETDEV_CHANGEINFODATA:
1570 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1571 break;
1572 default:
1573 break;
1574 }
1575
1576 return rtnl_event_type;
1577}
1578
79110a04
FW		 1579static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1580{
1581 const struct net_device *upper_dev;
1582 int ret = 0;
1583
1584 rcu_read_lock();
1585
1586 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1587 if (upper_dev)
1588 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1589
1590 rcu_read_unlock();
1591 return ret;
1592}
1593
feadc4b6
SD		 1594static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1595 bool force)
79110a04
FW		 1596{
1597 int ifindex = dev_get_iflink(dev);
1598
feadc4b6
SD		 1599 if (force || dev->ifindex != ifindex)
1600 return nla_put_u32(skb, IFLA_LINK, ifindex);
79110a04 1601
feadc4b6 1602 return 0;
79110a04
FW		 1603}
1604
6c557001
FW		 1605static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1606 struct net_device *dev)
1607{
1608 char buf[IFALIASZ];
1609 int ret;
1610
1611 ret = dev_get_alias(dev, buf, sizeof(buf));
1612 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1613}
1614
b1e66b9a 1615static int rtnl_fill_link_netnsid(struct sk_buff *skb,
79e1ad14 1616 const struct net_device *dev,
d4e4fdf9 1617 struct net *src_net, gfp_t gfp)
b1e66b9a 1618{
feadc4b6
SD		 1619 bool put_iflink = false;
1620
b1e66b9a
FW		 1621 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1622 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1623
1624 if (!net_eq(dev_net(dev), link_net)) {
d4e4fdf9 1625 int id = peernet2id_alloc(src_net, link_net, gfp);
b1e66b9a
FW		 1626
1627 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1628 return -EMSGSIZE;
feadc4b6
SD		 1629
1630 put_iflink = true;
b1e66b9a
FW		 1631 }
1632 }
1633
feadc4b6 1634 return nla_put_iflink(skb, dev, put_iflink);
b1e66b9a
FW		 1635}
1636
070cbf5b
FW		 1637static int rtnl_fill_link_af(struct sk_buff *skb,
1638 const struct net_device *dev,
1639 u32 ext_filter_mask)
1640{
1641 const struct rtnl_af_ops *af_ops;
1642 struct nlattr *af_spec;
1643
ae0be8de 1644 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
070cbf5b
FW		 1645 if (!af_spec)
1646 return -EMSGSIZE;
1647
5fa85a09 1648 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
070cbf5b
FW		 1649 struct nlattr *af;
1650 int err;
1651
1652 if (!af_ops->fill_link_af)
1653 continue;
1654
ae0be8de 1655 af = nla_nest_start_noflag(skb, af_ops->family);
070cbf5b
FW		 1656 if (!af)
1657 return -EMSGSIZE;
1658
1659 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1660 /*
1661 * Caller may return ENODATA to indicate that there
1662 * was no data to be dumped. This is not an error, it
1663 * means we should trim the attribute header and
1664 * continue.
1665 */
1666 if (err == -ENODATA)
1667 nla_nest_cancel(skb, af);
1668 else if (err < 0)
1669 return -EMSGSIZE;
1670
1671 nla_nest_end(skb, af);
1672 }
1673
1674 nla_nest_end(skb, af_spec);
1675 return 0;
1676}
1677
88f4fb0c
JP		 1678static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1679 const struct net_device *dev)
1680{
1681 struct netdev_name_node *name_node;
1682 int count = 0;
1683
1684 list_for_each_entry(name_node, &dev->name_node->list, list) {
1685 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1686 return -EMSGSIZE;
1687 count++;
1688 }
1689 return count;
1690}
1691
1692static int rtnl_fill_prop_list(struct sk_buff *skb,
1693 const struct net_device *dev)
1694{
1695 struct nlattr *prop_list;
1696 int ret;
1697
1698 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1699 if (!prop_list)
1700 return -EMSGSIZE;
1701
1702 ret = rtnl_fill_alt_ifnames(skb, dev);
1703 if (ret <= 0)
1704 goto nest_cancel;
1705
1706 nla_nest_end(skb, prop_list);
1707 return 0;
1708
1709nest_cancel:
1710 nla_nest_cancel(skb, prop_list);
1711 return ret;
1712}
1713
829eb208
RP		 1714static int rtnl_fill_proto_down(struct sk_buff *skb,
1715 const struct net_device *dev)
1716{
1717 struct nlattr *pr;
1718 u32 preason;
1719
1720 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1721 goto nla_put_failure;
1722
1723 preason = dev->proto_down_reason;
1724 if (!preason)
1725 return 0;
1726
1727 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1728 if (!pr)
1729 return -EMSGSIZE;
1730
1731 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1732 nla_nest_cancel(skb, pr);
1733 goto nla_put_failure;
1734 }
1735
1736 nla_nest_end(skb, pr);
1737 return 0;
1738
1739nla_put_failure:
1740 return -EMSGSIZE;
1741}
1742
dca56c30
JP		 1743static int rtnl_fill_devlink_port(struct sk_buff *skb,
1744 const struct net_device *dev)
1745{
1746 struct nlattr *devlink_port_nest;
1747 int ret;
1748
1749 devlink_port_nest = nla_nest_start(skb, IFLA_DEVLINK_PORT);
1750 if (!devlink_port_nest)
1751 return -EMSGSIZE;
1752
1753 if (dev->devlink_port) {
1754 ret = devlink_nl_port_handle_fill(skb, dev->devlink_port);
1755 if (ret < 0)
1756 goto nest_cancel;
1757 }
1758
1759 nla_nest_end(skb, devlink_port_nest);
1760 return 0;
1761
1762nest_cancel:
1763 nla_nest_cancel(skb, devlink_port_nest);
1764 return ret;
1765}
1766
79e1ad14
JB		 1767static int rtnl_fill_ifinfo(struct sk_buff *skb,
1768 struct net_device *dev, struct net *src_net,
575c3e2a 1769 int type, u32 pid, u32 seq, u32 change,
3d3ea5af 1770 unsigned int flags, u32 ext_filter_mask,
38e01b30 1771 u32 event, int *new_nsid, int new_ifindex,
d4e4fdf9 1772 int tgt_netnsid, gfp_t gfp)
b60c5115
TG		 1773{
1774 struct ifinfomsg *ifm;
1775 struct nlmsghdr *nlh;
5891cd5e 1776 struct Qdisc *qdisc;
1da177e4 1777
2907c35f 1778 ASSERT_RTNL();
b60c5115
TG		 1779 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1780 if (nlh == NULL)
26932566 1781 return -EMSGSIZE;
1da177e4 1782
b60c5115
TG		 1783 ifm = nlmsg_data(nlh);
1784 ifm->ifi_family = AF_UNSPEC;
1785 ifm->__ifi_pad = 0;
1786 ifm->ifi_type = dev->type;
1787 ifm->ifi_index = dev->ifindex;
1788 ifm->ifi_flags = dev_get_flags(dev);
1789 ifm->ifi_change = change;
1790
7e4a8d5a 1791 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
79e1ad14
JB		 1792 goto nla_put_failure;
1793
5891cd5e 1794 qdisc = rtnl_dereference(dev->qdisc);
a6574349
DM		 1795 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1796 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1797 nla_put_u8(skb, IFLA_OPERSTATE,
1798 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1799 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1800 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3e7a50ce
SH		 1801 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1802 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
a6574349 1803 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1804 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
7e6e1b57 1805 nla_put_u32(skb, IFLA_ALLMULTI, dev->allmulti) ||
76ff5cc9 1806 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1807 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1808 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
eac1b93c 1809 nla_put_u32(skb, IFLA_GRO_MAX_SIZE, dev->gro_max_size) ||
89527be8
ED		 1810 nla_put_u32(skb, IFLA_TSO_MAX_SIZE, dev->tso_max_size) ||
1811 nla_put_u32(skb, IFLA_TSO_MAX_SEGS, dev->tso_max_segs) ||
1d69c2b3 1812#ifdef CONFIG_RPS
76ff5cc9 1813 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1814#endif
79110a04 1815 put_master_ifindex(skb, dev) ||
9a57247f 1816 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
5891cd5e
ED		 1817 (qdisc &&
1818 nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) ||
6c557001 1819 nla_put_ifalias(skb, dev) ||
2d3b479d 1820 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
b2d3bcfa
DD		 1821 atomic_read(&dev->carrier_up_count) +
1822 atomic_read(&dev->carrier_down_count)) ||
b2d3bcfa
DD		 1823 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1824 atomic_read(&dev->carrier_up_count)) ||
1825 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1826 atomic_read(&dev->carrier_down_count)))
a6574349 1827 goto nla_put_failure;
0b815a1a 1828
829eb208
RP		 1829 if (rtnl_fill_proto_down(skb, dev))
1830 goto nla_put_failure;
1831
3d3ea5af
VY		 1832 if (event != IFLA_EVENT_NONE) {
1833 if (nla_put_u32(skb, IFLA_EVENT, event))
1834 goto nla_put_failure;
1835 }
1836
b22b941b
HFS		 1837 if (rtnl_fill_link_ifmap(skb, dev))
1838 goto nla_put_failure;
1da177e4
LT		 1839
1840 if (dev->addr_len) {
a6574349
DM		 1841 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1842 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1843 goto nla_put_failure;
1da177e4
LT		 1844 }
1845
66cae9ed
JP		 1846 if (rtnl_phys_port_id_fill(skb, dev))
1847 goto nla_put_failure;
1848
db24a904
DA		 1849 if (rtnl_phys_port_name_fill(skb, dev))
1850 goto nla_put_failure;
1851
82f28412
JP		 1852 if (rtnl_phys_switch_id_fill(skb, dev))
1853 goto nla_put_failure;
1854
b22b941b 1855 if (rtnl_fill_stats(skb, dev))
10708f37 1856 goto nla_put_failure;
10708f37 1857
250fc3df 1858 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
a6574349 1859 goto nla_put_failure;
57b61080 1860
c53864fd 1861 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1862 goto nla_put_failure;
1863
d1fdd913
BB		 1864 if (rtnl_xdp_fill(skb, dev))
1865 goto nla_put_failure;
1866
ba7d49b1 1867 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1868 if (rtnl_link_fill(skb, dev) < 0)
1869 goto nla_put_failure;
1870 }
1871
d4e4fdf9 1872 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
b1e66b9a 1873 goto nla_put_failure;
d37512a2 1874
6621dd29
ND		 1875 if (new_nsid &&
1876 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1877 goto nla_put_failure;
38e01b30
ND		 1878 if (new_ifindex &&
1879 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1880 goto nla_put_failure;
1881
f74877a5
MK		 1882 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1883 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1884 goto nla_put_failure;
6621dd29 1885
5fa85a09 1886 rcu_read_lock();
070cbf5b 1887 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
5fa85a09
FW		 1888 goto nla_put_failure_rcu;
1889 rcu_read_unlock();
f8ff182c 1890
88f4fb0c
JP		 1891 if (rtnl_fill_prop_list(skb, dev))
1892 goto nla_put_failure;
1893
00e77ed8
JB		 1894 if (dev->dev.parent &&
1895 nla_put_string(skb, IFLA_PARENT_DEV_NAME,
1896 dev_name(dev->dev.parent)))
1897 goto nla_put_failure;
1898
1899 if (dev->dev.parent && dev->dev.parent->bus &&
1900 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME,
1901 dev->dev.parent->bus->name))
1902 goto nla_put_failure;
1903
dca56c30
JP		 1904 if (rtnl_fill_devlink_port(skb, dev))
1905 goto nla_put_failure;
1906
053c095a
JB		 1907 nlmsg_end(skb, nlh);
1908 return 0;
b60c5115 1909
5fa85a09
FW		 1910nla_put_failure_rcu:
1911 rcu_read_unlock();
b60c5115 1912nla_put_failure:
26932566
PM		 1913 nlmsg_cancel(skb, nlh);
1914 return -EMSGSIZE;
1da177e4
LT		 1915}
1916
f7b12606 1917static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1918 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1919 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1920 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1921 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1922 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1923 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1924 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1925 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1926 [IFLA_TXQLEN] = { .type = NLA_U32 },
1927 [IFLA_WEIGHT] = { .type = NLA_U32 },
1928 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1929 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1930 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1931 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1932 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
2459b4c6
ND		 1933 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1934 * allow 0-length string (needed to remove an alias).
1935 */
1936 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
c02db8c6 1937 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1938 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1939 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1940 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1941 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1942 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1943 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1944 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
46e6b992
SH		 1945 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1946 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
02637fce 1947 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1948 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1949 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1950 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1951 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1952 [IFLA_XDP] = { .type = NLA_NESTED },
3d3ea5af 1953 [IFLA_EVENT] = { .type = NLA_U32 },
db833d40 1954 [IFLA_GROUP] = { .type = NLA_U32 },
7e4a8d5a 1955 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
b2d3bcfa
DD		 1956 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1957 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
3e7a50ce
SH		 1958 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1959 [IFLA_MAX_MTU] = { .type = NLA_U32 },
36fbf1e5
JP		 1960 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
1961 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
1962 .len = ALTIFNAMSIZ - 1 },
f74877a5 1963 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
829eb208 1964 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
7e4a5131 1965 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
88b71053 1966 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING },
eac1b93c 1967 [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 },
89527be8
ED		 1968 [IFLA_TSO_MAX_SIZE] = { .type = NLA_REJECT },
1969 [IFLA_TSO_MAX_SEGS] = { .type = NLA_REJECT },
7e6e1b57 1970 [IFLA_ALLMULTI] = { .type = NLA_REJECT },
da5e0494
TG		 1971};
1972
38f7b870
PM		 1973static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1974 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1975 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1976 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1977 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1978};
1979
c02db8c6 1980static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716 1981 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
75345f88 1982 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
364d5716 1983 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1984 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1985 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1986 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1987 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1988 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1989 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1990 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1991 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1992 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1993 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1994};
1995
57b61080
SF		 1996static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1997 [IFLA_PORT_VF] = { .type = NLA_U32 },
1998 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1999 .len = PORT_PROFILE_MAX },
57b61080
SF		 2000 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
2001 .len = PORT_UUID_MAX },
2002 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
2003 .len = PORT_UUID_MAX },
2004 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
2005 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 2006
2007 /* Unused, but we need to keep it here since user space could
2008 * fill it. It's also broken with regard to NLA_BINARY use in
2009 * combination with structs.
2010 */
2011 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
2012 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 2013};
2014
d1fdd913 2015static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
92234c8f 2016 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
d1fdd913 2017 [IFLA_XDP_FD] = { .type = NLA_S32 },
92234c8f 2018 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
d1fdd913 2019 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 2020 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
58038695 2021 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
d1fdd913
BB		 2022};
2023
dc599f76
DA		 2024static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
2025{
2026 const struct rtnl_link_ops *ops = NULL;
2027 struct nlattr *linfo[IFLA_INFO_MAX + 1];
2028
8cb08174 2029 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
dc599f76
DA		 2030 return NULL;
2031
2032 if (linfo[IFLA_INFO_KIND]) {
2033 char kind[MODULE_NAME_LEN];
2034
872f6903 2035 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
dc599f76
DA		 2036 ops = rtnl_link_ops_get(kind);
2037 }
2038
2039 return ops;
2040}
2041
2042static bool link_master_filtered(struct net_device *dev, int master_idx)
2043{
2044 struct net_device *master;
2045
2046 if (!master_idx)
2047 return false;
2048
2049 master = netdev_master_upper_dev_get(dev);
d3432bf1
LS		 2050
2051 /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
2052 * another invalid value for ifindex to denote "no master".
2053 */
2054 if (master_idx == -1)
2055 return !!master;
2056
dc599f76
DA		 2057 if (!master || master->ifindex != master_idx)
2058 return true;
2059
2060 return false;
2061}
2062
2063static bool link_kind_filtered(const struct net_device *dev,
2064 const struct rtnl_link_ops *kind_ops)
2065{
2066 if (kind_ops && dev->rtnl_link_ops != kind_ops)
2067 return true;
2068
2069 return false;
2070}
2071
2072static bool link_dump_filtered(struct net_device *dev,
2073 int master_idx,
2074 const struct rtnl_link_ops *kind_ops)
2075{
2076 if (link_master_filtered(dev, master_idx) ||
2077 link_kind_filtered(dev, kind_ops))
2078 return true;
2079
2080 return false;
2081}
2082
c383edc4
CB		 2083/**
2084 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
2085 * @sk: netlink socket
2086 * @netnsid: network namespace identifier
2087 *
2088 * Returns the network namespace identified by netnsid on success or an error
2089 * pointer on failure.
2090 */
2091struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
79e1ad14
JB		 2092{
2093 struct net *net;
2094
f428fe4a 2095 net = get_net_ns_by_id(sock_net(sk), netnsid);
79e1ad14
JB		 2096 if (!net)
2097 return ERR_PTR(-EINVAL);
2098
2099 /* For now, the caller is required to have CAP_NET_ADMIN in
2100 * the user namespace owning the target net ns.
2101 */
f428fe4a 2102 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
79e1ad14
JB		 2103 put_net(net);
2104 return ERR_PTR(-EACCES);
2105 }
2106 return net;
2107}
c383edc4 2108EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
79e1ad14 2109
905cf0ab
DA		 2110static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2111 bool strict_check, struct nlattr **tb,
2112 struct netlink_ext_ack *extack)
2113{
2114 int hdrlen;
2115
2116 if (strict_check) {
2117 struct ifinfomsg *ifm;
2118
2119 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2120 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2121 return -EINVAL;
2122 }
2123
2124 ifm = nlmsg_data(nlh);
2125 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2126 ifm->ifi_change) {
2127 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2128 return -EINVAL;
2129 }
2130 if (ifm->ifi_index) {
2131 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2132 return -EINVAL;
2133 }
2134
8cb08174
JB		 2135 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2136 IFLA_MAX, ifla_policy,
2137 extack);
905cf0ab
DA		 2138 }
2139
2140 /* A hack to preserve kernel<->userspace interface.
2141 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2142 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2143 * what iproute2 < v3.9.0 used.
2144 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2145 * attribute, its netlink message is shorter than struct ifinfomsg.
2146 */
2147 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2148 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2149
8cb08174
JB		 2150 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2151 extack);
905cf0ab
DA		 2152}
2153
f7b12606
JP		 2154static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2155{
905cf0ab
DA		 2156 struct netlink_ext_ack *extack = cb->extack;
2157 const struct nlmsghdr *nlh = cb->nlh;
f7b12606 2158 struct net *net = sock_net(skb->sk);
79e1ad14 2159 struct net *tgt_net = net;
f7b12606
JP		 2160 int h, s_h;
2161 int idx = 0, s_idx;
2162 struct net_device *dev;
2163 struct hlist_head *head;
2164 struct nlattr *tb[IFLA_MAX+1];
2165 u32 ext_filter_mask = 0;
dc599f76
DA		 2166 const struct rtnl_link_ops *kind_ops = NULL;
2167 unsigned int flags = NLM_F_MULTI;
2168 int master_idx = 0;
79e1ad14 2169 int netnsid = -1;
905cf0ab 2170 int err, i;
f7b12606
JP		 2171
2172 s_h = cb->args[0];
2173 s_idx = cb->args[1];
2174
905cf0ab
DA		 2175 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2176 if (err < 0) {
2177 if (cb->strict_check)
2178 return err;
2179
2180 goto walk_entries;
2181 }
2182
2183 for (i = 0; i <= IFLA_MAX; ++i) {
2184 if (!tb[i])
2185 continue;
e5eca6d4 2186
905cf0ab
DA		 2187 /* new attributes should only be added with strict checking */
2188 switch (i) {
2189 case IFLA_TARGET_NETNSID:
2190 netnsid = nla_get_s32(tb[i]);
c383edc4 2191 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
905cf0ab
DA		 2192 if (IS_ERR(tgt_net)) {
2193 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
893626d6 2194 return PTR_ERR(tgt_net);
905cf0ab
DA		 2195 }
2196 break;
2197 case IFLA_EXT_MASK:
2198 ext_filter_mask = nla_get_u32(tb[i]);
2199 break;
2200 case IFLA_MASTER:
2201 master_idx = nla_get_u32(tb[i]);
2202 break;
2203 case IFLA_LINKINFO:
2204 kind_ops = linkinfo_to_kind_ops(tb[i]);
2205 break;
2206 default:
2207 if (cb->strict_check) {
2208 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2209 return -EINVAL;
2210 }
79e1ad14 2211 }
f7b12606
JP		 2212 }
2213
905cf0ab
DA		 2214 if (master_idx || kind_ops)
2215 flags |= NLM_F_DUMP_FILTERED;
2216
2217walk_entries:
f7b12606
JP		 2218 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2219 idx = 0;
79e1ad14 2220 head = &tgt_net->dev_index_head[h];
cac5e65e 2221 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 2222 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 2223 goto cont;
f7b12606
JP		 2224 if (idx < s_idx)
2225 goto cont;
79e1ad14
JB		 2226 err = rtnl_fill_ifinfo(skb, dev, net,
2227 RTM_NEWLINK,
973462bb 2228 NETLINK_CB(cb->skb).portid,
905cf0ab 2229 nlh->nlmsg_seq, 0, flags,
38e01b30 2230 ext_filter_mask, 0, NULL, 0,
d4e4fdf9 2231 netnsid, GFP_KERNEL);
973462bb 2232
f6c5775f
DA		 2233 if (err < 0) {
2234 if (likely(skb->len))
2235 goto out;
2236
2237 goto out_err;
2238 }
f7b12606
JP		 2239cont:
2240 idx++;
2241 }
2242 }
2243out:
f6c5775f
DA		 2244 err = skb->len;
2245out_err:
f7b12606
JP		 2246 cb->args[1] = idx;
2247 cb->args[0] = h;
a9ecb0cb 2248 cb->seq = tgt_net->dev_base_seq;
d0225784 2249 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
79e1ad14
JB		 2250 if (netnsid >= 0)
2251 put_net(tgt_net);
f7b12606 2252
f6c5775f 2253 return err;
f7b12606
JP		 2254}
2255
fceb6435
JB		 2256int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2257 struct netlink_ext_ack *exterr)
f7b12606 2258{
8cb08174
JB		 2259 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2260 exterr);
f7b12606
JP		 2261}
2262EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2263
81adee47
EB		 2264struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2265{
2266 struct net *net;
2267 /* Examine the link attributes and figure out which
2268 * network namespace we are talking about.
2269 */
2270 if (tb[IFLA_NET_NS_PID])
2271 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 2272 else if (tb[IFLA_NET_NS_FD])
2273 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 2274 else
2275 net = get_net(src_net);
2276 return net;
2277}
2278EXPORT_SYMBOL(rtnl_link_get_net);
2279
7c4f63ba
CB		 2280/* Figure out which network namespace we are talking about by
2281 * examining the link attributes in the following order:
2282 *
2283 * 1. IFLA_NET_NS_PID
2284 * 2. IFLA_NET_NS_FD
7e4a8d5a 2285 * 3. IFLA_TARGET_NETNSID
7c4f63ba
CB		 2286 */
2287static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2288 struct nlattr *tb[])
2289{
2290 struct net *net;
2291
2292 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2293 return rtnl_link_get_net(src_net, tb);
2294
7e4a8d5a 2295 if (!tb[IFLA_TARGET_NETNSID])
7c4f63ba
CB		 2296 return get_net(src_net);
2297
7e4a8d5a 2298 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
7c4f63ba
CB		 2299 if (!net)
2300 return ERR_PTR(-EINVAL);
2301
2302 return net;
2303}
2304
2305static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2306 struct net *src_net,
2307 struct nlattr *tb[], int cap)
2308{
2309 struct net *net;
2310
2311 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2312 if (IS_ERR(net))
2313 return net;
2314
2315 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2316 put_net(net);
2317 return ERR_PTR(-EPERM);
2318 }
2319
2320 return net;
2321}
2322
4ff66cae
CB		 2323/* Verify that rtnetlink requests do not pass additional properties
2324 * potentially referring to different network namespaces.
2325 */
2326static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2327 struct netlink_ext_ack *extack,
2328 bool netns_id_only)
2329{
2330
2331 if (netns_id_only) {
2332 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2333 return 0;
2334
2335 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2336 return -EOPNOTSUPP;
2337 }
2338
7e4a8d5a 2339 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
4ff66cae
CB		 2340 goto invalid_attr;
2341
7e4a8d5a 2342 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
4ff66cae
CB		 2343 goto invalid_attr;
2344
7e4a8d5a 2345 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
4ff66cae
CB		 2346 goto invalid_attr;
2347
2348 return 0;
2349
2350invalid_attr:
2351 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2352 return -EINVAL;
2353}
2354
a14857c2
BC		 2355static int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
2356 int max_tx_rate)
2357{
2358 const struct net_device_ops *ops = dev->netdev_ops;
2359
2360 if (!ops->ndo_set_vf_rate)
2361 return -EOPNOTSUPP;
2362 if (max_tx_rate && max_tx_rate < min_tx_rate)
2363 return -EINVAL;
2364
2365 return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate);
2366}
2367
8679c31e
RY		 2368static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[],
2369 struct netlink_ext_ack *extack)
1840bb13
TG		 2370{
2371 if (dev) {
2372 if (tb[IFLA_ADDRESS] &&
2373 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2374 return -EINVAL;
2375
2376 if (tb[IFLA_BROADCAST] &&
2377 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2378 return -EINVAL;
2379 }
2380
cf7afbfe
TG		 2381 if (tb[IFLA_AF_SPEC]) {
2382 struct nlattr *af;
2383 int rem, err;
2384
2385 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2386 const struct rtnl_af_ops *af_ops;
2387
5fa85a09 2388 af_ops = rtnl_af_lookup(nla_type(af));
a100243d 2389 if (!af_ops)
cf7afbfe
TG		 2390 return -EAFNOSUPPORT;
2391
a100243d 2392 if (!af_ops->set_link_af)
cf7afbfe
TG		 2393 return -EOPNOTSUPP;
2394
2395 if (af_ops->validate_link_af) {
8679c31e 2396 err = af_ops->validate_link_af(dev, af, extack);
a100243d 2397 if (err < 0)
cf7afbfe
TG		 2398 return err;
2399 }
2400 }
2401 }
2402
1840bb13
TG		 2403 return 0;
2404}
2405
cc8e27cc
EC		 2406static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2407 int guid_type)
2408{
2409 const struct net_device_ops *ops = dev->netdev_ops;
2410
2411 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2412}
2413
2414static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2415{
2416 if (dev->type != ARPHRD_INFINIBAND)
2417 return -EOPNOTSUPP;
2418
2419 return handle_infiniband_guid(dev, ivt, guid_type);
2420}
2421
4f7d2cdf 2422static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 2423{
c02db8c6 2424 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 2425 int err = -EINVAL;
c02db8c6 2426
4f7d2cdf
DB		 2427 if (tb[IFLA_VF_MAC]) {
2428 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 2429
ff08ddba
DC		 2430 if (ivm->vf >= INT_MAX)
2431 return -EINVAL;
4f7d2cdf
DB		 2432 err = -EOPNOTSUPP;
2433 if (ops->ndo_set_vf_mac)
2434 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2435 ivm->mac);
2436 if (err < 0)
2437 return err;
2438 }
2439
2440 if (tb[IFLA_VF_VLAN]) {
2441 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2442
ff08ddba
DC		 2443 if (ivv->vf >= INT_MAX)
2444 return -EINVAL;
4f7d2cdf
DB		 2445 err = -EOPNOTSUPP;
2446 if (ops->ndo_set_vf_vlan)
2447 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 2448 ivv->qos,
2449 htons(ETH_P_8021Q));
2450 if (err < 0)
2451 return err;
2452 }
2453
2454 if (tb[IFLA_VF_VLAN_LIST]) {
2455 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2456 struct nlattr *attr;
2457 int rem, len = 0;
2458
2459 err = -EOPNOTSUPP;
2460 if (!ops->ndo_set_vf_vlan)
2461 return err;
2462
2463 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2464 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2465 nla_len(attr) < NLA_HDRLEN) {
2466 return -EINVAL;
2467 }
2468 if (len >= MAX_VLAN_LIST_LEN)
2469 return -EOPNOTSUPP;
2470 ivvl[len] = nla_data(attr);
2471
2472 len++;
2473 }
fa34cd94
AB		 2474 if (len == 0)
2475 return -EINVAL;
2476
ff08ddba
DC		 2477 if (ivvl[0]->vf >= INT_MAX)
2478 return -EINVAL;
79aab093
MS		 2479 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2480 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 2481 if (err < 0)
2482 return err;
c02db8c6 2483 }
4f7d2cdf
DB		 2484
2485 if (tb[IFLA_VF_TX_RATE]) {
2486 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2487 struct ifla_vf_info ivf;
2488
ff08ddba
DC		 2489 if (ivt->vf >= INT_MAX)
2490 return -EINVAL;
4f7d2cdf
DB		 2491 err = -EOPNOTSUPP;
2492 if (ops->ndo_get_vf_config)
2493 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2494 if (err < 0)
2495 return err;
2496
a14857c2
BC		 2497 err = rtnl_set_vf_rate(dev, ivt->vf,
2498 ivf.min_tx_rate, ivt->rate);
4f7d2cdf
DB		 2499 if (err < 0)
2500 return err;
2501 }
2502
2503 if (tb[IFLA_VF_RATE]) {
2504 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2505
ff08ddba
DC		 2506 if (ivt->vf >= INT_MAX)
2507 return -EINVAL;
a14857c2
BC		 2508
2509 err = rtnl_set_vf_rate(dev, ivt->vf,
2510 ivt->min_tx_rate, ivt->max_tx_rate);
4f7d2cdf
DB		 2511 if (err < 0)
2512 return err;
2513 }
2514
2515 if (tb[IFLA_VF_SPOOFCHK]) {
2516 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2517
ff08ddba
DC		 2518 if (ivs->vf >= INT_MAX)
2519 return -EINVAL;
4f7d2cdf
DB		 2520 err = -EOPNOTSUPP;
2521 if (ops->ndo_set_vf_spoofchk)
2522 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2523 ivs->setting);
2524 if (err < 0)
2525 return err;
2526 }
2527
2528 if (tb[IFLA_VF_LINK_STATE]) {
2529 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2530
ff08ddba
DC		 2531 if (ivl->vf >= INT_MAX)
2532 return -EINVAL;
4f7d2cdf
DB		 2533 err = -EOPNOTSUPP;
2534 if (ops->ndo_set_vf_link_state)
2535 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2536 ivl->link_state);
2537 if (err < 0)
2538 return err;
2539 }
2540
2541 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2542 struct ifla_vf_rss_query_en *ivrssq_en;
2543
2544 err = -EOPNOTSUPP;
2545 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
ff08ddba
DC		 2546 if (ivrssq_en->vf >= INT_MAX)
2547 return -EINVAL;
4f7d2cdf
DB		 2548 if (ops->ndo_set_vf_rss_query_en)
2549 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2550 ivrssq_en->setting);
2551 if (err < 0)
2552 return err;
2553 }
2554
dd461d6a
HS		 2555 if (tb[IFLA_VF_TRUST]) {
2556 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2557
ff08ddba
DC		 2558 if (ivt->vf >= INT_MAX)
2559 return -EINVAL;
dd461d6a
HS		 2560 err = -EOPNOTSUPP;
2561 if (ops->ndo_set_vf_trust)
2562 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2563 if (err < 0)
2564 return err;
2565 }
2566
cc8e27cc
EC		 2567 if (tb[IFLA_VF_IB_NODE_GUID]) {
2568 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2569
ff08ddba
DC		 2570 if (ivt->vf >= INT_MAX)
2571 return -EINVAL;
cc8e27cc
EC		 2572 if (!ops->ndo_set_vf_guid)
2573 return -EOPNOTSUPP;
cc8e27cc
EC		 2574 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2575 }
2576
2577 if (tb[IFLA_VF_IB_PORT_GUID]) {
2578 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2579
ff08ddba
DC		 2580 if (ivt->vf >= INT_MAX)
2581 return -EINVAL;
cc8e27cc
EC		 2582 if (!ops->ndo_set_vf_guid)
2583 return -EOPNOTSUPP;
2584
2585 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2586 }
2587
c02db8c6
CW		 2588 return err;
2589}
2590
33eaf2a6
DA		 2591static int do_set_master(struct net_device *dev, int ifindex,
2592 struct netlink_ext_ack *extack)
fbaec0ea 2593{
898e5061 2594 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 2595 const struct net_device_ops *ops;
2596 int err;
2597
898e5061
JP		 2598 if (upper_dev) {
2599 if (upper_dev->ifindex == ifindex)
fbaec0ea 2600 return 0;
898e5061 2601 ops = upper_dev->netdev_ops;
fbaec0ea 2602 if (ops->ndo_del_slave) {
898e5061 2603 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 2604 if (err)
2605 return err;
2606 } else {
2607 return -EOPNOTSUPP;
2608 }
2609 }
2610
2611 if (ifindex) {
898e5061
JP		 2612 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2613 if (!upper_dev)
fbaec0ea 2614 return -EINVAL;
898e5061 2615 ops = upper_dev->netdev_ops;
fbaec0ea 2616 if (ops->ndo_add_slave) {
33eaf2a6 2617 err = ops->ndo_add_slave(upper_dev, dev, extack);
fbaec0ea
JP		 2618 if (err)
2619 return err;
2620 } else {
2621 return -EOPNOTSUPP;
2622 }
2623 }
2624 return 0;
2625}
2626
829eb208
RP		 2627static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2628 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2629 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2630};
2631
2632static int do_set_proto_down(struct net_device *dev,
2633 struct nlattr *nl_proto_down,
2634 struct nlattr *nl_proto_down_reason,
2635 struct netlink_ext_ack *extack)
2636{
2637 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
829eb208
RP		 2638 unsigned long mask = 0;
2639 u32 value;
2640 bool proto_down;
2641 int err;
2642
2106efda 2643 if (!(dev->priv_flags & IFF_CHANGE_PROTO_DOWN)) {
829eb208
RP		 2644 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2645 return -EOPNOTSUPP;
2646 }
2647
2648 if (nl_proto_down_reason) {
2649 err = nla_parse_nested_deprecated(pdreason,
2650 IFLA_PROTO_DOWN_REASON_MAX,
2651 nl_proto_down_reason,
2652 ifla_proto_down_reason_policy,
2653 NULL);
2654 if (err < 0)
2655 return err;
2656
2657 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2658 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2659 return -EINVAL;
2660 }
2661
2662 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2663
2664 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2665 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2666
2667 dev_change_proto_down_reason(dev, mask, value);
2668 }
2669
2670 if (nl_proto_down) {
2671 proto_down = nla_get_u8(nl_proto_down);
2672
d467d0bc 2673 /* Don't turn off protodown if there are active reasons */
829eb208
RP		 2674 if (!proto_down && dev->proto_down_reason) {
2675 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2676 return -EBUSY;
2677 }
2678 err = dev_change_proto_down(dev,
2679 proto_down);
2680 if (err)
2681 return err;
2682 }
2683
2684 return 0;
2685}
2686
90c325e3 2687#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 2688/* notify flag means notify + modified. */
2689#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 2690static int do_setlink(const struct sk_buff *skb,
2691 struct net_device *dev, struct ifinfomsg *ifm,
ddf9f970 2692 struct netlink_ext_ack *extack,
5ea08b52 2693 struct nlattr **tb, int status)
1da177e4 2694{
d314774c 2695 const struct net_device_ops *ops = dev->netdev_ops;
5ea08b52 2696 char ifname[IFNAMSIZ];
0157f60c 2697 int err;
1da177e4 2698
8679c31e 2699 err = validate_linkmsg(dev, tb, extack);
644c7eeb
ED		 2700 if (err < 0)
2701 return err;
2702
5ea08b52
FF		 2703 if (tb[IFLA_IFNAME])
2704 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2705 else
2706 ifname[0] = '\0';
2707
7e4a8d5a 2708 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
5ea08b52 2709 const char *pat = ifname[0] ? ifname : NULL;
eeb85a14
AV		 2710 struct net *net;
2711 int new_ifindex;
2712
2713 net = rtnl_link_get_net_capable(skb, dev_net(dev),
2714 tb, CAP_NET_ADMIN);
d8a5ec67
EB		 2715 if (IS_ERR(net)) {
2716 err = PTR_ERR(net);
2717 goto errout;
2718 }
7c4f63ba 2719
eeb85a14
AV		 2720 if (tb[IFLA_NEW_IFINDEX])
2721 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]);
2722 else
2723 new_ifindex = 0;
2724
96a6b93b 2725 err = __dev_change_net_namespace(dev, net, pat, new_ifindex);
d8a5ec67
EB		 2726 put_net(net);
2727 if (err)
2728 goto errout;
90c325e3 2729 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 2730 }
2731
da5e0494 2732 if (tb[IFLA_MAP]) {
1da177e4
LT		 2733 struct rtnl_link_ifmap *u_map;
2734 struct ifmap k_map;
2735
d314774c 2736 if (!ops->ndo_set_config) {
1da177e4 2737 err = -EOPNOTSUPP;
0157f60c 2738 goto errout;
1da177e4
LT		 2739 }
2740
2741 if (!netif_device_present(dev)) {
2742 err = -ENODEV;
0157f60c 2743 goto errout;
1da177e4 2744 }
1da177e4 2745
da5e0494 2746 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 2747 k_map.mem_start = (unsigned long) u_map->mem_start;
2748 k_map.mem_end = (unsigned long) u_map->mem_end;
2749 k_map.base_addr = (unsigned short) u_map->base_addr;
2750 k_map.irq = (unsigned char) u_map->irq;
2751 k_map.dma = (unsigned char) u_map->dma;
2752 k_map.port = (unsigned char) u_map->port;
2753
d314774c 2754 err = ops->ndo_set_config(dev, &k_map);
da5e0494 2755 if (err < 0)
0157f60c 2756 goto errout;
1da177e4 2757
ba998906 2758 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 2759 }
2760
da5e0494 2761 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 2762 struct sockaddr *sa;
2763 int len;
2764
153711f9
WC		 2765 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2766 sizeof(*sa));
70f8e78e
DM		 2767 sa = kmalloc(len, GFP_KERNEL);
2768 if (!sa) {
2769 err = -ENOMEM;
0157f60c 2770 goto errout;
70f8e78e
DM		 2771 }
2772 sa->sa_family = dev->type;
da5e0494 2773 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 2774 dev->addr_len);
3b23a32a 2775 err = dev_set_mac_address_user(dev, sa, extack);
70f8e78e 2776 kfree(sa);
1da177e4 2777 if (err)
0157f60c 2778 goto errout;
90c325e3 2779 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2780 }
2781
da5e0494 2782 if (tb[IFLA_MTU]) {
7a4c53be 2783 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
da5e0494 2784 if (err < 0)
0157f60c 2785 goto errout;
90c325e3 2786 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2787 }
2788
cbda10fa
VD		 2789 if (tb[IFLA_GROUP]) {
2790 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 2791 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 2792 }
2793
da5e0494
TG		 2794 /*
2795 * Interface selected by interface index but interface
2796 * name provided implies that a name change has been
2797 * requested.
2798 */
51055be8 2799 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2800 err = dev_change_name(dev, ifname);
2801 if (err < 0)
0157f60c 2802 goto errout;
90c325e3 2803 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2804 }
2805
0b815a1a
SH		 2806 if (tb[IFLA_IFALIAS]) {
2807 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2808 nla_len(tb[IFLA_IFALIAS]));
2809 if (err < 0)
2810 goto errout;
ba998906 2811 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2812 }
2813
da5e0494
TG		 2814 if (tb[IFLA_BROADCAST]) {
2815 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2816 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2817 }
2818
fbaec0ea 2819 if (tb[IFLA_MASTER]) {
33eaf2a6 2820 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
fbaec0ea
JP		 2821 if (err)
2822 goto errout;
90c325e3 2823 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2824 }
2825
a4abfa62
PS		 2826 if (ifm->ifi_flags || ifm->ifi_change) {
2827 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2828 extack);
2829 if (err < 0)
2830 goto errout;
2831 }
2832
9a57247f
JP		 2833 if (tb[IFLA_CARRIER]) {
2834 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2835 if (err)
2836 goto errout;
90c325e3 2837 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2838 }
2839
5d1180fc 2840 if (tb[IFLA_TXQLEN]) {
0cd29503 2841 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
6a643ddb
CW		 2842
2843 err = dev_change_tx_queue_len(dev, value);
2844 if (err)
2845 goto errout;
2846 status |= DO_SETLINK_MODIFIED;
5d1180fc 2847 }
b00055aa 2848
46e6b992
SH		 2849 if (tb[IFLA_GSO_MAX_SIZE]) {
2850 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2851
7c4e983c 2852 if (max_size > dev->tso_max_size) {
46e6b992
SH		 2853 err = -EINVAL;
2854 goto errout;
2855 }
2856
2857 if (dev->gso_max_size ^ max_size) {
2858 netif_set_gso_max_size(dev, max_size);
2859 status |= DO_SETLINK_MODIFIED;
2860 }
2861 }
2862
2863 if (tb[IFLA_GSO_MAX_SEGS]) {
2864 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2865
14d7b812 2866 if (max_segs > GSO_MAX_SEGS || max_segs > dev->tso_max_segs) {
46e6b992
SH		 2867 err = -EINVAL;
2868 goto errout;
2869 }
2870
2871 if (dev->gso_max_segs ^ max_segs) {
6d872df3 2872 netif_set_gso_max_segs(dev, max_segs);
46e6b992
SH		 2873 status |= DO_SETLINK_MODIFIED;
2874 }
2875 }
2876
eac1b93c
CL		 2877 if (tb[IFLA_GRO_MAX_SIZE]) {
2878 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]);
2879
2880 if (dev->gro_max_size ^ gro_max_size) {
2881 netif_set_gro_max_size(dev, gro_max_size);
2882 status |= DO_SETLINK_MODIFIED;
2883 }
2884 }
2885
da5e0494 2886 if (tb[IFLA_OPERSTATE])
93b2d4a2 2887 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2888
da5e0494 2889 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2890 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2891
fd888e85 2892 write_lock(&dev_base_lock);
1889b0e7 2893 if (dev->link_mode ^ value)
ba998906 2894 status |= DO_SETLINK_NOTIFY;
1889b0e7 2895 dev->link_mode = value;
fd888e85 2896 write_unlock(&dev_base_lock);
b00055aa
SR		 2897 }
2898
c02db8c6 2899 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2900 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2901 struct nlattr *attr;
2902 int rem;
4f7d2cdf 2903
c02db8c6 2904 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2905 if (nla_type(attr) != IFLA_VF_INFO ||
2906 nla_len(attr) < NLA_HDRLEN) {
253683bb 2907 err = -EINVAL;
c02db8c6 2908 goto errout;
253683bb 2909 }
8cb08174
JB		 2910 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2911 attr,
2912 ifla_vf_policy,
2913 NULL);
4f7d2cdf
DB		 2914 if (err < 0)
2915 goto errout;
2916 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2917 if (err < 0)
2918 goto errout;
ba998906 2919 status |= DO_SETLINK_NOTIFY;
c02db8c6 2920 }
ebc08a6f 2921 }
1da177e4
LT		 2922 err = 0;
2923
57b61080
SF		 2924 if (tb[IFLA_VF_PORTS]) {
2925 struct nlattr *port[IFLA_PORT_MAX+1];
2926 struct nlattr *attr;
2927 int vf;
2928 int rem;
2929
2930 err = -EOPNOTSUPP;
2931 if (!ops->ndo_set_vf_port)
2932 goto errout;
2933
2934 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2935 if (nla_type(attr) != IFLA_VF_PORT ||
2936 nla_len(attr) < NLA_HDRLEN) {
2937 err = -EINVAL;
2938 goto errout;
2939 }
8cb08174
JB		 2940 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2941 attr,
2942 ifla_port_policy,
2943 NULL);
57b61080
SF		 2944 if (err < 0)
2945 goto errout;
2946 if (!port[IFLA_PORT_VF]) {
2947 err = -EOPNOTSUPP;
2948 goto errout;
2949 }
2950 vf = nla_get_u32(port[IFLA_PORT_VF]);
2951 err = ops->ndo_set_vf_port(dev, vf, port);
2952 if (err < 0)
2953 goto errout;
ba998906 2954 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2955 }
2956 }
2957 err = 0;
2958
2959 if (tb[IFLA_PORT_SELF]) {
2960 struct nlattr *port[IFLA_PORT_MAX+1];
2961
8cb08174
JB		 2962 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2963 tb[IFLA_PORT_SELF],
2964 ifla_port_policy, NULL);
57b61080
SF		 2965 if (err < 0)
2966 goto errout;
2967
2968 err = -EOPNOTSUPP;
2969 if (ops->ndo_set_vf_port)
2970 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2971 if (err < 0)
2972 goto errout;
ba998906 2973 status |= DO_SETLINK_NOTIFY;
57b61080 2974 }
f8ff182c
TG		 2975
2976 if (tb[IFLA_AF_SPEC]) {
2977 struct nlattr *af;
2978 int rem;
2979
2980 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2981 const struct rtnl_af_ops *af_ops;
2982
058c8d59 2983 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
f8ff182c 2984
3583a4e8 2985 err = af_ops->set_link_af(dev, af, extack);
a100243d 2986 if (err < 0)
f8ff182c
TG		 2987 goto errout;
2988
ba998906 2989 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2990 }
2991 }
57b61080
SF		 2992 err = 0;
2993
829eb208
RP		 2994 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
2995 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
2996 tb[IFLA_PROTO_DOWN_REASON], extack);
88d6378b
AK		 2997 if (err)
2998 goto errout;
2999 status |= DO_SETLINK_NOTIFY;
3000 }
3001
d1fdd913
BB		 3002 if (tb[IFLA_XDP]) {
3003 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 3004 u32 xdp_flags = 0;
d1fdd913 3005
8cb08174
JB		 3006 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
3007 tb[IFLA_XDP],
3008 ifla_xdp_policy, NULL);
d1fdd913
BB		 3009 if (err < 0)
3010 goto errout;
3011
58038695 3012 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
262d8625
BB		 3013 err = -EINVAL;
3014 goto errout;
3015 }
85de8576
DB		 3016
3017 if (xdp[IFLA_XDP_FLAGS]) {
3018 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
3019 if (xdp_flags & ~XDP_FLAGS_MASK) {
3020 err = -EINVAL;
3021 goto errout;
3022 }
ee5d032f 3023 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
0489df9a
DB		 3024 err = -EINVAL;
3025 goto errout;
3026 }
85de8576
DB		 3027 }
3028
d1fdd913 3029 if (xdp[IFLA_XDP_FD]) {
92234c8f
THJ		 3030 int expected_fd = -1;
3031
3032 if (xdp_flags & XDP_FLAGS_REPLACE) {
3033 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
3034 err = -EINVAL;
3035 goto errout;
3036 }
3037 expected_fd =
3038 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
3039 }
3040
ddf9f970 3041 err = dev_change_xdp_fd(dev, extack,
85de8576 3042 nla_get_s32(xdp[IFLA_XDP_FD]),
92234c8f 3043 expected_fd,
85de8576 3044 xdp_flags);
d1fdd913
BB		 3045 if (err)
3046 goto errout;
3047 status |= DO_SETLINK_NOTIFY;
3048 }
3049 }
3050
0157f60c 3051errout:
ba998906 3052 if (status & DO_SETLINK_MODIFIED) {
64ff90cc 3053 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
ba998906
ND		 3054 netdev_state_change(dev);
3055
3056 if (err < 0)
3057 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",
3058 dev->name);
3059 }
da5e0494 3060
0157f60c
PM		 3061 return err;
3062}
1da177e4 3063
cc6090e9 3064static struct net_device *rtnl_dev_get(struct net *net,
5ea08b52
FF		 3065 struct nlattr *tb[])
3066{
3067 char ifname[ALTIFNAMSIZ];
3068
3069 if (tb[IFLA_IFNAME])
3070 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3071 else if (tb[IFLA_ALT_IFNAME])
3072 nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ);
3073 else
3074 return NULL;
cc6090e9
JP		 3075
3076 return __dev_get_by_name(net, ifname);
3077}
3078
c21ef3e3
DA		 3079static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3080 struct netlink_ext_ack *extack)
0157f60c 3081{
3b1e0a65 3082 struct net *net = sock_net(skb->sk);
0157f60c
PM		 3083 struct ifinfomsg *ifm;
3084 struct net_device *dev;
3085 int err;
3086 struct nlattr *tb[IFLA_MAX+1];
0157f60c 3087
8cb08174
JB		 3088 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3089 ifla_policy, extack);
0157f60c
PM		 3090 if (err < 0)
3091 goto errout;
3092
4ff66cae
CB		 3093 err = rtnl_ensure_unique_netns(tb, extack, false);
3094 if (err < 0)
3095 goto errout;
3096
0157f60c
PM		 3097 err = -EINVAL;
3098 ifm = nlmsg_data(nlh);
3099 if (ifm->ifi_index > 0)
a3d12891 3100 dev = __dev_get_by_index(net, ifm->ifi_index);
76c9ac0e 3101 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
5ea08b52 3102 dev = rtnl_dev_get(net, tb);
0157f60c
PM		 3103 else
3104 goto errout;
3105
3106 if (dev == NULL) {
3107 err = -ENODEV;
3108 goto errout;
3109 }
3110
5ea08b52 3111 err = do_setlink(skb, dev, ifm, extack, tb, 0);
da5e0494 3112errout:
1da177e4
LT		 3113 return err;
3114}
3115
66400d54
WC		 3116static int rtnl_group_dellink(const struct net *net, int group)
3117{
3118 struct net_device *dev, *aux;
3119 LIST_HEAD(list_kill);
3120 bool found = false;
3121
3122 if (!group)
3123 return -EPERM;
3124
3125 for_each_netdev(net, dev) {
3126 if (dev->group == group) {
3127 const struct rtnl_link_ops *ops;
3128
3129 found = true;
3130 ops = dev->rtnl_link_ops;
3131 if (!ops || !ops->dellink)
3132 return -EOPNOTSUPP;
3133 }
3134 }
3135
3136 if (!found)
3137 return -ENODEV;
3138
3139 for_each_netdev_safe(net, dev, aux) {
3140 if (dev->group == group) {
3141 const struct rtnl_link_ops *ops;
3142
3143 ops = dev->rtnl_link_ops;
3144 ops->dellink(dev, &list_kill);
3145 }
3146 }
3147 unregister_netdevice_many(&list_kill);
3148
3149 return 0;
3150}
3151
f3a63cce 3152int rtnl_delete_link(struct net_device *dev, u32 portid, const struct nlmsghdr *nlh)
614732ea
TG		 3153{
3154 const struct rtnl_link_ops *ops;
3155 LIST_HEAD(list_kill);
3156
3157 ops = dev->rtnl_link_ops;
3158 if (!ops || !ops->dellink)
3159 return -EOPNOTSUPP;
3160
3161 ops->dellink(dev, &list_kill);
f3a63cce 3162 unregister_netdevice_many_notify(&list_kill, portid, nlh);
614732ea
TG		 3163
3164 return 0;
3165}
3166EXPORT_SYMBOL_GPL(rtnl_delete_link);
3167
c21ef3e3
DA		 3168static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3169 struct netlink_ext_ack *extack)
38f7b870 3170{
3b1e0a65 3171 struct net *net = sock_net(skb->sk);
f3a63cce 3172 u32 portid = NETLINK_CB(skb).portid;
b61ad68a
CB		 3173 struct net *tgt_net = net;
3174 struct net_device *dev = NULL;
38f7b870 3175 struct ifinfomsg *ifm;
38f7b870
PM		 3176 struct nlattr *tb[IFLA_MAX+1];
3177 int err;
b61ad68a 3178 int netnsid = -1;
38f7b870 3179
8cb08174
JB		 3180 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3181 ifla_policy, extack);
38f7b870
PM		 3182 if (err < 0)
3183 return err;
3184
4ff66cae
CB		 3185 err = rtnl_ensure_unique_netns(tb, extack, true);
3186 if (err < 0)
3187 return err;
3188
7e4a8d5a
CB		 3189 if (tb[IFLA_TARGET_NETNSID]) {
3190 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
c383edc4 3191 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
b61ad68a
CB		 3192 if (IS_ERR(tgt_net))
3193 return PTR_ERR(tgt_net);
3194 }
3195
3196 err = -EINVAL;
38f7b870
PM		 3197 ifm = nlmsg_data(nlh);
3198 if (ifm->ifi_index > 0)
b61ad68a 3199 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
76c9ac0e 3200 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
5ea08b52 3201 dev = rtnl_dev_get(net, tb);
66400d54 3202 else if (tb[IFLA_GROUP])
b61ad68a 3203 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870 3204 else
b61ad68a 3205 goto out;
38f7b870 3206
b61ad68a 3207 if (!dev) {
dee04163 3208 if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0)
b61ad68a
CB		 3209 err = -ENODEV;
3210
3211 goto out;
3212 }
3213
f3a63cce 3214 err = rtnl_delete_link(dev, portid, nlh);
38f7b870 3215
b61ad68a
CB		 3216out:
3217 if (netnsid >= 0)
3218 put_net(tgt_net);
3219
3220 return err;
38f7b870
PM		 3221}
3222
1d997f10
HL		 3223int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm,
3224 u32 portid, const struct nlmsghdr *nlh)
3729d502
PM		 3225{
3226 unsigned int old_flags;
3227 int err;
3228
3229 old_flags = dev->flags;
3230 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
6d040321
PM		 3231 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3232 NULL);
3729d502
PM		 3233 if (err < 0)
3234 return err;
3235 }
3236
8d356b89 3237 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
1d997f10 3238 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags), portid, nlh);
8d356b89
RP		 3239 } else {
3240 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
1d997f10 3241 __dev_notify_flags(dev, old_flags, ~0U, portid, nlh);
8d356b89 3242 }
3729d502
PM		 3243 return 0;
3244}
3245EXPORT_SYMBOL(rtnl_configure_link);
3246
d0522f1c
DA		 3247struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3248 unsigned char name_assign_type,
3249 const struct rtnl_link_ops *ops,
3250 struct nlattr *tb[],
3251 struct netlink_ext_ack *extack)
e7199288 3252{
e7199288 3253 struct net_device *dev;
d40156aa
JP		 3254 unsigned int num_tx_queues = 1;
3255 unsigned int num_rx_queues = 1;
e7199288 3256
76ff5cc9
JP		 3257 if (tb[IFLA_NUM_TX_QUEUES])
3258 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3259 else if (ops->get_num_tx_queues)
d40156aa 3260 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 3261
3262 if (tb[IFLA_NUM_RX_QUEUES])
3263 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3264 else if (ops->get_num_rx_queues)
d40156aa 3265 num_rx_queues = ops->get_num_rx_queues();
efacb309 3266
d0522f1c
DA		 3267 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3268 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
0e1d6eca 3269 return ERR_PTR(-EINVAL);
d0522f1c 3270 }
0e1d6eca 3271
d0522f1c
DA		 3272 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3273 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
0e1d6eca 3274 return ERR_PTR(-EINVAL);
d0522f1c 3275 }
0e1d6eca 3276
8c713dc9
JB		 3277 if (ops->alloc) {
3278 dev = ops->alloc(tb, ifname, name_assign_type,
3279 num_tx_queues, num_rx_queues);
3280 if (IS_ERR(dev))
3281 return dev;
3282 } else {
3283 dev = alloc_netdev_mqs(ops->priv_size, ifname,
3284 name_assign_type, ops->setup,
3285 num_tx_queues, num_rx_queues);
3286 }
3287
e7199288 3288 if (!dev)
d1892e4e 3289 return ERR_PTR(-ENOMEM);
e7199288 3290
81adee47
EB		 3291 dev_net_set(dev, net);
3292 dev->rtnl_link_ops = ops;
3729d502 3293 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 3294
d836f5c6
ED		 3295 if (tb[IFLA_MTU]) {
3296 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3297 int err;
3298
3299 err = dev_validate_mtu(dev, mtu, extack);
3300 if (err) {
3301 free_netdev(dev);
3302 return ERR_PTR(err);
3303 }
3304 dev->mtu = mtu;
3305 }
2afb9b53 3306 if (tb[IFLA_ADDRESS]) {
efd38f75
JK		 3307 __dev_addr_set(dev, nla_data(tb[IFLA_ADDRESS]),
3308 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 3309 dev->addr_assign_type = NET_ADDR_SET;
3310 }
e7199288
PE		 3311 if (tb[IFLA_BROADCAST])
3312 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3313 nla_len(tb[IFLA_BROADCAST]));
3314 if (tb[IFLA_TXQLEN])
3315 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3316 if (tb[IFLA_OPERSTATE])
93b2d4a2 3317 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 3318 if (tb[IFLA_LINKMODE])
3319 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 3320 if (tb[IFLA_GROUP])
3321 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
46e6b992
SH		 3322 if (tb[IFLA_GSO_MAX_SIZE])
3323 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3324 if (tb[IFLA_GSO_MAX_SEGS])
6d872df3 3325 netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS]));
eac1b93c
CL		 3326 if (tb[IFLA_GRO_MAX_SIZE])
3327 netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE]));
e7199288
PE		 3328
3329 return dev;
e7199288 3330}
e0d087af 3331EXPORT_SYMBOL(rtnl_create_link);
e7199288 3332
90f62cf3
EB		 3333static int rtnl_group_changelink(const struct sk_buff *skb,
3334 struct net *net, int group,
e7ed828f 3335 struct ifinfomsg *ifm,
ddf9f970 3336 struct netlink_ext_ack *extack,
e7ed828f
VD		 3337 struct nlattr **tb)
3338{
d079535d 3339 struct net_device *dev, *aux;
e7ed828f
VD		 3340 int err;
3341
d079535d 3342 for_each_netdev_safe(net, dev, aux) {
e7ed828f 3343 if (dev->group == group) {
5ea08b52 3344 err = do_setlink(skb, dev, ifm, extack, tb, 0);
e7ed828f
VD		 3345 if (err < 0)
3346 return err;
3347 }
3348 }
3349
3350 return 0;
3351}
3352
63105e83
JK		 3353static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
3354 const struct rtnl_link_ops *ops,
d88e136c 3355 const struct nlmsghdr *nlh,
63105e83 3356 struct nlattr **tb, struct nlattr **data,
02839cc8
JK		 3357 struct netlink_ext_ack *extack)
3358{
3359 unsigned char name_assign_type = NET_NAME_USER;
3360 struct net *net = sock_net(skb->sk);
d88e136c 3361 u32 portid = NETLINK_CB(skb).portid;
02839cc8
JK		 3362 struct net *dest_net, *link_net;
3363 struct net_device *dev;
3364 char ifname[IFNAMSIZ];
3365 int err;
3366
3367 if (!ops->alloc && !ops->setup)
3368 return -EOPNOTSUPP;
3369
3370 if (tb[IFLA_IFNAME]) {
3371 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3372 } else {
3373 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3374 name_assign_type = NET_NAME_ENUM;
3375 }
3376
3377 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3378 if (IS_ERR(dest_net))
3379 return PTR_ERR(dest_net);
3380
3381 if (tb[IFLA_LINK_NETNSID]) {
3382 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3383
3384 link_net = get_net_ns_by_id(dest_net, id);
3385 if (!link_net) {
3386 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3387 err = -EINVAL;
3388 goto out;
3389 }
3390 err = -EPERM;
3391 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3392 goto out;
3393 } else {
3394 link_net = NULL;
3395 }
3396
3397 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3398 name_assign_type, ops, tb, extack);
3399 if (IS_ERR(dev)) {
3400 err = PTR_ERR(dev);
3401 goto out;
3402 }
3403
3404 dev->ifindex = ifm->ifi_index;
3405
3406 if (ops->newlink)
3407 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3408 else
3409 err = register_netdevice(dev);
3410 if (err < 0) {
3411 free_netdev(dev);
3412 goto out;
3413 }
3414
d88e136c 3415 err = rtnl_configure_link(dev, ifm, portid, nlh);
02839cc8
JK		 3416 if (err < 0)
3417 goto out_unregister;
3418 if (link_net) {
3419 err = dev_change_net_namespace(dev, dest_net, ifname);
3420 if (err < 0)
3421 goto out_unregister;
3422 }
3423 if (tb[IFLA_MASTER]) {
3424 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3425 if (err)
3426 goto out_unregister;
3427 }
3428out:
3429 if (link_net)
3430 put_net(link_net);
3431 put_net(dest_net);
3432 return err;
3433out_unregister:
3434 if (ops->newlink) {
3435 LIST_HEAD(list_kill);
3436
3437 ops->dellink(dev, &list_kill);
3438 unregister_netdevice_many(&list_kill);
3439 } else {
3440 unregister_netdevice(dev);
3441 }
3442 goto out;
3443}
63105e83 3444
c92bf26c
JK		 3445struct rtnl_newlink_tbs {
3446 struct nlattr *tb[IFLA_MAX + 1];
3447 struct nlattr *attr[RTNL_MAX_TYPE + 1];
3448 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3449};
3450
a2939745 3451static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
c92bf26c
JK		 3452 struct rtnl_newlink_tbs *tbs,
3453 struct netlink_ext_ack *extack)
38f7b870 3454{
420d0318 3455 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
c92bf26c 3456 struct nlattr ** const tb = tbs->tb;
c6f6f244
ED		 3457 const struct rtnl_link_ops *m_ops;
3458 struct net_device *master_dev;
3b1e0a65 3459 struct net *net = sock_net(skb->sk);
38f7b870 3460 const struct rtnl_link_ops *ops;
420d0318
JK		 3461 struct nlattr **slave_data;
3462 char kind[MODULE_NAME_LEN];
38f7b870
PM		 3463 struct net_device *dev;
3464 struct ifinfomsg *ifm;
420d0318 3465 struct nlattr **data;
ef2a7c90 3466 bool link_specified;
38f7b870
PM		 3467 int err;
3468
95a5afca 3469#ifdef CONFIG_MODULES
38f7b870 3470replay:
8072f085 3471#endif
8cb08174
JB		 3472 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3473 ifla_policy, extack);
38f7b870
PM		 3474 if (err < 0)
3475 return err;
3476
4ff66cae
CB		 3477 err = rtnl_ensure_unique_netns(tb, extack, false);
3478 if (err < 0)
3479 return err;
3480
38f7b870 3481 ifm = nlmsg_data(nlh);
ef2a7c90
FF		 3482 if (ifm->ifi_index > 0) {
3483 link_specified = true;
881d966b 3484 dev = __dev_get_by_index(net, ifm->ifi_index);
ef2a7c90
FF		 3485 } else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) {
3486 link_specified = true;
5ea08b52 3487 dev = rtnl_dev_get(net, tb);
ef2a7c90
FF		 3488 } else {
3489 link_specified = false;
7af12cba 3490 dev = NULL;
ef2a7c90 3491 }
38f7b870 3492
c6f6f244
ED		 3493 master_dev = NULL;
3494 m_ops = NULL;
ba7d49b1
JP		 3495 if (dev) {
3496 master_dev = netdev_master_upper_dev_get(dev);
3497 if (master_dev)
3498 m_ops = master_dev->rtnl_link_ops;
3499 }
3500
8679c31e 3501 err = validate_linkmsg(dev, tb, extack);
e0d087af 3502 if (err < 0)
1840bb13
TG		 3503 return err;
3504
38f7b870 3505 if (tb[IFLA_LINKINFO]) {
8cb08174
JB		 3506 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3507 tb[IFLA_LINKINFO],
3508 ifla_info_policy, NULL);
38f7b870
PM		 3509 if (err < 0)
3510 return err;
3511 } else
3512 memset(linkinfo, 0, sizeof(linkinfo));
3513
3514 if (linkinfo[IFLA_INFO_KIND]) {
872f6903 3515 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
38f7b870
PM		 3516 ops = rtnl_link_ops_get(kind);
3517 } else {
3518 kind[0] = '\0';
3519 ops = NULL;
3520 }
3521
420d0318
JK		 3522 data = NULL;
3523 if (ops) {
3524 if (ops->maxtype > RTNL_MAX_TYPE)
3525 return -EINVAL;
ccf8dbcd 3526
420d0318 3527 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
c92bf26c 3528 err = nla_parse_nested_deprecated(tbs->attr, ops->maxtype,
8cb08174
JB		 3529 linkinfo[IFLA_INFO_DATA],
3530 ops->policy, extack);
420d0318
JK		 3531 if (err < 0)
3532 return err;
c92bf26c 3533 data = tbs->attr;
38f7b870 3534 }
420d0318
JK		 3535 if (ops->validate) {
3536 err = ops->validate(tb, data, extack);
3537 if (err < 0)
3538 return err;
3539 }
3540 }
38f7b870 3541
420d0318
JK		 3542 slave_data = NULL;
3543 if (m_ops) {
3544 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3545 return -EINVAL;
ccf8dbcd 3546
420d0318
JK		 3547 if (m_ops->slave_maxtype &&
3548 linkinfo[IFLA_INFO_SLAVE_DATA]) {
c92bf26c 3549 err = nla_parse_nested_deprecated(tbs->slave_attr,
8cb08174
JB		 3550 m_ops->slave_maxtype,
3551 linkinfo[IFLA_INFO_SLAVE_DATA],
3552 m_ops->slave_policy,
3553 extack);
420d0318
JK		 3554 if (err < 0)
3555 return err;
c92bf26c 3556 slave_data = tbs->slave_attr;
ba7d49b1 3557 }
420d0318 3558 }
ba7d49b1 3559
420d0318
JK		 3560 if (dev) {
3561 int status = 0;
38f7b870 3562
420d0318
JK		 3563 if (nlh->nlmsg_flags & NLM_F_EXCL)
3564 return -EEXIST;
3565 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3566 return -EOPNOTSUPP;
38f7b870 3567
420d0318
JK		 3568 if (linkinfo[IFLA_INFO_DATA]) {
3569 if (!ops || ops != dev->rtnl_link_ops ||
3570 !ops->changelink)
3571 return -EOPNOTSUPP;
38f7b870 3572
420d0318
JK		 3573 err = ops->changelink(dev, tb, data, extack);
3574 if (err < 0)
3575 return err;
3576 status |= DO_SETLINK_NOTIFY;
3577 }
ba7d49b1 3578
420d0318
JK		 3579 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3580 if (!m_ops || !m_ops->slave_changelink)
3581 return -EOPNOTSUPP;
ba7d49b1 3582
420d0318
JK		 3583 err = m_ops->slave_changelink(master_dev, dev, tb,
3584 slave_data, extack);
3585 if (err < 0)
3586 return err;
3587 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 3588 }
3589
5ea08b52 3590 return do_setlink(skb, dev, ifm, extack, tb, status);
420d0318
JK		 3591 }
3592
3593 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
ef2a7c90
FF		 3594 /* No dev found and NLM_F_CREATE not set. Requested dev does not exist,
3595 * or it's for a group
3596 */
3597 if (link_specified)
3598 return -ENODEV;
3599 if (tb[IFLA_GROUP])
420d0318 3600 return rtnl_group_changelink(skb, net,
ffa934f1 3601 nla_get_u32(tb[IFLA_GROUP]),
ddf9f970 3602 ifm, extack, tb);
6f37c9f9 3603 return -ENODEV;
420d0318 3604 }
38f7b870 3605
420d0318
JK		 3606 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3607 return -EOPNOTSUPP;
38f7b870 3608
420d0318 3609 if (!ops) {
95a5afca 3610#ifdef CONFIG_MODULES
420d0318
JK		 3611 if (kind[0]) {
3612 __rtnl_unlock();
3613 request_module("rtnl-link-%s", kind);
3614 rtnl_lock();
3615 ops = rtnl_link_ops_get(kind);
3616 if (ops)
3617 goto replay;
38f7b870 3618 }
420d0318
JK		 3619#endif
3620 NL_SET_ERR_MSG(extack, "Unknown device type");
3621 return -EOPNOTSUPP;
3622 }
38f7b870 3623
d88e136c 3624 return rtnl_newlink_create(skb, ifm, ops, nlh, tb, data, extack);
63105e83
JK		 3625}
3626
a2939745
JK		 3627static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3628 struct netlink_ext_ack *extack)
3629{
c92bf26c 3630 struct rtnl_newlink_tbs *tbs;
a2939745
JK		 3631 int ret;
3632
c92bf26c
JK		 3633 tbs = kmalloc(sizeof(*tbs), GFP_KERNEL);
3634 if (!tbs)
a2939745
JK		 3635 return -ENOMEM;
3636
c92bf26c
JK		 3637 ret = __rtnl_newlink(skb, nlh, tbs, extack);
3638 kfree(tbs);
a2939745
JK		 3639 return ret;
3640}
3641
9b3757b0
JK		 3642static int rtnl_valid_getlink_req(struct sk_buff *skb,
3643 const struct nlmsghdr *nlh,
3644 struct nlattr **tb,
3645 struct netlink_ext_ack *extack)
3646{
3647 struct ifinfomsg *ifm;
3648 int i, err;
3649
3650 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3651 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3652 return -EINVAL;
3653 }
3654
3655 if (!netlink_strict_get_check(skb))
8cb08174
JB		 3656 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3657 ifla_policy, extack);
9b3757b0
JK		 3658
3659 ifm = nlmsg_data(nlh);
3660 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3661 ifm->ifi_change) {
3662 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3663 return -EINVAL;
3664 }
3665
8cb08174
JB		 3666 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3667 ifla_policy, extack);
9b3757b0
JK		 3668 if (err)
3669 return err;
3670
3671 for (i = 0; i <= IFLA_MAX; i++) {
3672 if (!tb[i])
3673 continue;
3674
3675 switch (i) {
3676 case IFLA_IFNAME:
76c9ac0e 3677 case IFLA_ALT_IFNAME:
9b3757b0
JK		 3678 case IFLA_EXT_MASK:
3679 case IFLA_TARGET_NETNSID:
3680 break;
3681 default:
3682 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3683 return -EINVAL;
3684 }
3685 }
3686
3687 return 0;
3688}
3689
c21ef3e3
DA		 3690static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3691 struct netlink_ext_ack *extack)
711e2c33 3692{
3b1e0a65 3693 struct net *net = sock_net(skb->sk);
79e1ad14 3694 struct net *tgt_net = net;
b60c5115
TG		 3695 struct ifinfomsg *ifm;
3696 struct nlattr *tb[IFLA_MAX+1];
3697 struct net_device *dev = NULL;
3698 struct sk_buff *nskb;
79e1ad14 3699 int netnsid = -1;
339bf98f 3700 int err;
115c9b81 3701 u32 ext_filter_mask = 0;
711e2c33 3702
9b3757b0 3703 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
b60c5115 3704 if (err < 0)
9918f230 3705 return err;
b60c5115 3706
4ff66cae
CB		 3707 err = rtnl_ensure_unique_netns(tb, extack, true);
3708 if (err < 0)
3709 return err;
3710
7e4a8d5a
CB		 3711 if (tb[IFLA_TARGET_NETNSID]) {
3712 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
c383edc4 3713 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
79e1ad14
JB		 3714 if (IS_ERR(tgt_net))
3715 return PTR_ERR(tgt_net);
3716 }
3717
115c9b81
GR		 3718 if (tb[IFLA_EXT_MASK])
3719 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3720
79e1ad14 3721 err = -EINVAL;
b60c5115 3722 ifm = nlmsg_data(nlh);
a3d12891 3723 if (ifm->ifi_index > 0)
79e1ad14 3724 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
76c9ac0e 3725 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
5ea08b52 3726 dev = rtnl_dev_get(tgt_net, tb);
a3d12891 3727 else
79e1ad14 3728 goto out;
711e2c33 3729
79e1ad14 3730 err = -ENODEV;
a3d12891 3731 if (dev == NULL)
79e1ad14 3732 goto out;
a3d12891 3733
79e1ad14 3734 err = -ENOBUFS;
115c9b81 3735 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891 3736 if (nskb == NULL)
79e1ad14 3737 goto out;
b60c5115 3738
79e1ad14
JB		 3739 err = rtnl_fill_ifinfo(nskb, dev, net,
3740 RTM_NEWLINK, NETLINK_CB(skb).portid,
3741 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
d4e4fdf9 3742 0, NULL, 0, netnsid, GFP_KERNEL);
26932566
PM		 3743 if (err < 0) {
3744 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3745 WARN_ON(err == -EMSGSIZE);
3746 kfree_skb(nskb);
a3d12891 3747 } else
15e47304 3748 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
79e1ad14
JB		 3749out:
3750 if (netnsid >= 0)
3751 put_net(tgt_net);
711e2c33 3752
b60c5115 3753 return err;
711e2c33 3754}
711e2c33 3755
36fbf1e5
JP		 3756static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3757 bool *changed, struct netlink_ext_ack *extack)
3758{
3759 char *alt_ifname;
155fb43b 3760 size_t size;
36fbf1e5
JP		 3761 int err;
3762
3763 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3764 if (err)
3765 return err;
3766
155fb43b
JK		 3767 if (cmd == RTM_NEWLINKPROP) {
3768 size = rtnl_prop_list_size(dev);
3769 size += nla_total_size(ALTIFNAMSIZ);
3770 if (size >= U16_MAX) {
3771 NL_SET_ERR_MSG(extack,
3772 "effective property list too long");
3773 return -EINVAL;
3774 }
3775 }
3776
5d26cff5 3777 alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
44bfa9c5
ED		 3778 if (!alt_ifname)
3779 return -ENOMEM;
3780
36fbf1e5 3781 if (cmd == RTM_NEWLINKPROP) {
36fbf1e5 3782 err = netdev_name_node_alt_create(dev, alt_ifname);
44bfa9c5
ED		 3783 if (!err)
3784 alt_ifname = NULL;
36fbf1e5
JP		 3785 } else if (cmd == RTM_DELLINKPROP) {
3786 err = netdev_name_node_alt_destroy(dev, alt_ifname);
36fbf1e5 3787 } else {
44bfa9c5
ED		 3788 WARN_ON_ONCE(1);
3789 err = -EINVAL;
36fbf1e5
JP		 3790 }
3791
44bfa9c5
ED		 3792 kfree(alt_ifname);
3793 if (!err)
3794 *changed = true;
3795 return err;
36fbf1e5
JP		 3796}
3797
3798static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3799 struct netlink_ext_ack *extack)
3800{
3801 struct net *net = sock_net(skb->sk);
3802 struct nlattr *tb[IFLA_MAX + 1];
3803 struct net_device *dev;
3804 struct ifinfomsg *ifm;
3805 bool changed = false;
3806 struct nlattr *attr;
3807 int err, rem;
3808
3809 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3810 if (err)
3811 return err;
3812
3813 err = rtnl_ensure_unique_netns(tb, extack, true);
3814 if (err)
3815 return err;
3816
3817 ifm = nlmsg_data(nlh);
cc6090e9 3818 if (ifm->ifi_index > 0)
36fbf1e5 3819 dev = __dev_get_by_index(net, ifm->ifi_index);
76c9ac0e 3820 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
5ea08b52 3821 dev = rtnl_dev_get(net, tb);
cc6090e9 3822 else
36fbf1e5 3823 return -EINVAL;
36fbf1e5
JP		 3824
3825 if (!dev)
3826 return -ENODEV;
3827
3828 if (!tb[IFLA_PROP_LIST])
3829 return 0;
3830
3831 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3832 switch (nla_type(attr)) {
3833 case IFLA_ALT_IFNAME:
3834 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3835 if (err)
3836 return err;
3837 break;
3838 }
3839 }
3840
3841 if (changed)
3842 netdev_state_change(dev);
3843 return 0;
3844}
3845
3846static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3847 struct netlink_ext_ack *extack)
3848{
3849 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3850}
3851
3852static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3853 struct netlink_ext_ack *extack)
3854{
3855 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3856}
3857
ebfe3c51 3858static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 3859{
115c9b81 3860 struct net *net = sock_net(skb->sk);
ebfe3c51 3861 size_t min_ifinfo_dump_size = 0;
115c9b81
GR		 3862 struct nlattr *tb[IFLA_MAX+1];
3863 u32 ext_filter_mask = 0;
ebfe3c51 3864 struct net_device *dev;
e5eca6d4
MS		 3865 int hdrlen;
3866
3867 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3868 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3869 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 3870
8cb08174 3871 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
a4b64fbe
ED		 3872 if (tb[IFLA_EXT_MASK])
3873 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3874 }
115c9b81
GR		 3875
3876 if (!ext_filter_mask)
3877 return NLMSG_GOODSIZE;
3878 /*
3879 * traverse the list of net devices and compute the minimum
3880 * buffer size based upon the filter mask.
3881 */
6853dd48
FW		 3882 rcu_read_lock();
3883 for_each_netdev_rcu(net, dev) {
ebfe3c51
DZ		 3884 min_ifinfo_dump_size = max(min_ifinfo_dump_size,
3885 if_nlmsg_size(dev, ext_filter_mask));
115c9b81 3886 }
6853dd48 3887 rcu_read_unlock();
115c9b81 3888
93af2056 3889 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 3890}
3891
42bad1da 3892static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 3893{
3894 int idx;
3895 int s_idx = cb->family;
87ccbb1f 3896 int type = cb->nlh->nlmsg_type - RTM_BASE;
c63586dc 3897 int ret = 0;
1da177e4
LT		 3898
3899 if (s_idx == 0)
3900 s_idx = 1;
6853dd48 3901
25239cee 3902 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
51e13685 3903 struct rtnl_link __rcu **tab;
addf9b90 3904 struct rtnl_link *link;
6853dd48
FW		 3905 rtnl_dumpit_func dumpit;
3906
1da177e4
LT		 3907 if (idx < s_idx || idx == PF_PACKET)
3908 continue;
6853dd48 3909
addf9b90 3910 if (type < 0 || type >= RTM_NR_MSGTYPES)
1da177e4 3911 continue;
6853dd48 3912
addf9b90
FW		 3913 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3914 if (!tab)
3915 continue;
3916
51e13685 3917 link = rcu_dereference_rtnl(tab[type]);
addf9b90
FW		 3918 if (!link)
3919 continue;
3920
3921 dumpit = link->dumpit;
6853dd48
FW		 3922 if (!dumpit)
3923 continue;
3924
0465277f 3925 if (idx > s_idx) {
1da177e4 3926 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 3927 cb->prev_seq = 0;
3928 cb->seq = 0;
3929 }
c63586dc 3930 ret = dumpit(skb, cb);
5e1acb4a 3931 if (ret)
1da177e4
LT		 3932 break;
3933 }
3934 cb->family = idx;
3935
c63586dc 3936 return skb->len ? : ret;
1da177e4
LT		 3937}
3938
395eea6c 3939struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3d3ea5af 3940 unsigned int change,
38e01b30 3941 u32 event, gfp_t flags, int *new_nsid,
1d997f10 3942 int new_ifindex, u32 portid, u32 seq)
1da177e4 3943{
c346dca1 3944 struct net *net = dev_net(dev);
1da177e4 3945 struct sk_buff *skb;
0ec6d3f4 3946 int err = -ENOBUFS;
1da177e4 3947
50af5969 3948 skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
0ec6d3f4
TG		 3949 if (skb == NULL)
3950 goto errout;
1da177e4 3951
79e1ad14 3952 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
1d997f10 3953 type, portid, seq, change, 0, 0, event,
d4e4fdf9 3954 new_nsid, new_ifindex, -1, flags);
26932566
PM		 3955 if (err < 0) {
3956 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3957 WARN_ON(err == -EMSGSIZE);
3958 kfree_skb(skb);
3959 goto errout;
3960 }
395eea6c 3961 return skb;
0ec6d3f4
TG		 3962errout:
3963 if (err < 0)
4b3da706 3964 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 3965 return NULL;
3966}
3967
1d997f10
HL		 3968void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags,
3969 u32 portid, const struct nlmsghdr *nlh)
395eea6c
MB		 3970{
3971 struct net *net = dev_net(dev);
3972
1d997f10 3973 rtnl_notify(skb, net, portid, RTNLGRP_LINK, nlh, flags);
395eea6c
MB		 3974}
3975
3d3ea5af
VY		 3976static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3977 unsigned int change, u32 event,
1d997f10
HL		 3978 gfp_t flags, int *new_nsid, int new_ifindex,
3979 u32 portid, const struct nlmsghdr *nlh)
395eea6c
MB		 3980{
3981 struct sk_buff *skb;
3982
ed2a80ab
ND		 3983 if (dev->reg_state != NETREG_REGISTERED)
3984 return;
3985
38e01b30 3986 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
1d997f10 3987 new_ifindex, portid, nlmsg_seq(nlh));
395eea6c 3988 if (skb)
1d997f10 3989 rtmsg_ifinfo_send(skb, dev, flags, portid, nlh);
1da177e4 3990}
3d3ea5af
VY		 3991
3992void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
1d997f10 3993 gfp_t flags, u32 portid, const struct nlmsghdr *nlh)
3d3ea5af 3994{
38e01b30 3995 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
1d997f10 3996 NULL, 0, portid, nlh);
3d3ea5af 3997}
1da177e4 3998
6621dd29 3999void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
38e01b30 4000 gfp_t flags, int *new_nsid, int new_ifindex)
6621dd29
ND		 4001{
4002 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
1d997f10 4003 new_nsid, new_ifindex, 0, NULL);
6621dd29
ND		 4004}
4005
d83b0603
JF		 4006static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
4007 struct net_device *dev,
1e53d5bb 4008 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 4009 int type, unsigned int flags,
b3379041 4010 int nlflags, u16 ndm_state)
d83b0603
JF		 4011{
4012 struct nlmsghdr *nlh;
4013 struct ndmsg *ndm;
4014
1c104a6b 4015 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 4016 if (!nlh)
4017 return -EMSGSIZE;
4018
4019 ndm = nlmsg_data(nlh);
4020 ndm->ndm_family = AF_BRIDGE;
4021 ndm->ndm_pad1 = 0;
4022 ndm->ndm_pad2 = 0;
4023 ndm->ndm_flags = flags;
4024 ndm->ndm_type = 0;
4025 ndm->ndm_ifindex = dev->ifindex;
b3379041 4026 ndm->ndm_state = ndm_state;
d83b0603
JF		 4027
4028 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
4029 goto nla_put_failure;
1e53d5bb
HS		 4030 if (vid)
4031 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
4032 goto nla_put_failure;
d83b0603 4033
053c095a
JB		 4034 nlmsg_end(skb, nlh);
4035 return 0;
d83b0603
JF		 4036
4037nla_put_failure:
4038 nlmsg_cancel(skb, nlh);
4039 return -EMSGSIZE;
4040}
4041
3ff661c3
JF		 4042static inline size_t rtnl_fdb_nlmsg_size(void)
4043{
f82ef3e1
SD		 4044 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
4045 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
4046 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
4047 0;
3ff661c3
JF		 4048}
4049
b3379041
HS		 4050static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
4051 u16 ndm_state)
3ff661c3
JF		 4052{
4053 struct net *net = dev_net(dev);
4054 struct sk_buff *skb;
4055 int err = -ENOBUFS;
4056
4057 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
4058 if (!skb)
4059 goto errout;
4060
1e53d5bb 4061 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 4062 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 4063 if (err < 0) {
4064 kfree_skb(skb);
4065 goto errout;
4066 }
4067
4068 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
4069 return;
4070errout:
4071 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
4072}
4073
a986967e 4074/*
090096bf
VY		 4075 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
4076 */
4077int ndo_dflt_fdb_add(struct ndmsg *ndm,
4078 struct nlattr *tb[],
4079 struct net_device *dev,
f6f6424b 4080 const unsigned char *addr, u16 vid,
090096bf
VY		 4081 u16 flags)
4082{
4083 int err = -EINVAL;
4084
4085 /* If aging addresses are supported device will need to
4086 * implement its own handler for this.
4087 */
4088 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
78ecc890 4089 netdev_info(dev, "default FDB implementation only supports local addresses\n");
090096bf
VY		 4090 return err;
4091 }
4092
a35ec8e3
HS		 4093 if (tb[NDA_FLAGS_EXT]) {
4094 netdev_info(dev, "invalid flags given to default FDB implementation\n");
4095 return err;
4096 }
4097
65891fea 4098 if (vid) {
23ac0b42 4099 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n");
65891fea
OG		 4100 return err;
4101 }
4102
090096bf
VY		 4103 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4104 err = dev_uc_add_excl(dev, addr);
4105 else if (is_multicast_ether_addr(addr))
4106 err = dev_mc_add_excl(dev, addr);
4107
4108 /* Only return duplicate errors if NLM_F_EXCL is set */
4109 if (err == -EEXIST && !(flags & NLM_F_EXCL))
4110 err = 0;
4111
4112 return err;
4113}
4114EXPORT_SYMBOL(ndo_dflt_fdb_add);
4115
b88d12e4
FW		 4116static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
4117 struct netlink_ext_ack *extack)
f6f6424b
JP		 4118{
4119 u16 vid = 0;
4120
4121 if (vlan_attr) {
4122 if (nla_len(vlan_attr) != sizeof(u16)) {
b88d12e4 4123 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
f6f6424b
JP		 4124 return -EINVAL;
4125 }
4126
4127 vid = nla_get_u16(vlan_attr);
4128
4129 if (!vid || vid >= VLAN_VID_MASK) {
b88d12e4 4130 NL_SET_ERR_MSG(extack, "invalid vlan id");
f6f6424b
JP		 4131 return -EINVAL;
4132 }
4133 }
4134 *p_vid = vid;
4135 return 0;
4136}
4137
c21ef3e3
DA		 4138static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
4139 struct netlink_ext_ack *extack)
77162022
JF		 4140{
4141 struct net *net = sock_net(skb->sk);
77162022
JF		 4142 struct ndmsg *ndm;
4143 struct nlattr *tb[NDA_MAX+1];
4144 struct net_device *dev;
4145 u8 *addr;
f6f6424b 4146 u16 vid;
77162022
JF		 4147 int err;
4148
8cb08174
JB		 4149 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4150 extack);
77162022
JF		 4151 if (err < 0)
4152 return err;
4153
4154 ndm = nlmsg_data(nlh);
4155 if (ndm->ndm_ifindex == 0) {
b88d12e4 4156 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 4157 return -EINVAL;
4158 }
4159
4160 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4161 if (dev == NULL) {
b88d12e4 4162 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 4163 return -ENODEV;
4164 }
4165
4166 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 4167 NL_SET_ERR_MSG(extack, "invalid address");
77162022
JF		 4168 return -EINVAL;
4169 }
4170
da715775
IS		 4171 if (dev->type != ARPHRD_ETHER) {
4172 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4173 return -EINVAL;
4174 }
4175
77162022 4176 addr = nla_data(tb[NDA_LLADDR]);
77162022 4177
b88d12e4 4178 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 4179 if (err)
4180 return err;
4181
77162022
JF		 4182 err = -EOPNOTSUPP;
4183
4184 /* Support fdb on master device the net/bridge default case */
4185 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2e92a2d0 4186 netif_is_bridge_port(dev)) {
898e5061
JP		 4187 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4188 const struct net_device_ops *ops = br_dev->netdev_ops;
4189
f6f6424b 4190 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
87b0984e 4191 nlh->nlmsg_flags, extack);
77162022
JF		 4192 if (err)
4193 goto out;
4194 else
4195 ndm->ndm_flags &= ~NTF_MASTER;
4196 }
4197
4198 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 4199 if ((ndm->ndm_flags & NTF_SELF)) {
4200 if (dev->netdev_ops->ndo_fdb_add)
4201 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 4202 vid,
87b0984e
PM		 4203 nlh->nlmsg_flags,
4204 extack);
090096bf 4205 else
f6f6424b 4206 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 4207 nlh->nlmsg_flags);
77162022 4208
3ff661c3 4209 if (!err) {
b3379041
HS		 4210 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4211 ndm->ndm_state);
77162022 4212 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 4213 }
77162022
JF		 4214 }
4215out:
4216 return err;
4217}
4218
a986967e 4219/*
090096bf
VY		 4220 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4221 */
4222int ndo_dflt_fdb_del(struct ndmsg *ndm,
4223 struct nlattr *tb[],
4224 struct net_device *dev,
f6f6424b 4225 const unsigned char *addr, u16 vid)
090096bf 4226{
c8a89c4a 4227 int err = -EINVAL;
090096bf
VY		 4228
4229 /* If aging addresses are supported device will need to
4230 * implement its own handler for this.
4231 */
64535993 4232 if (!(ndm->ndm_state & NUD_PERMANENT)) {
78ecc890 4233 netdev_info(dev, "default FDB implementation only supports local addresses\n");
c8a89c4a 4234 return err;
090096bf
VY		 4235 }
4236
4237 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4238 err = dev_uc_del(dev, addr);
4239 else if (is_multicast_ether_addr(addr))
4240 err = dev_mc_del(dev, addr);
090096bf
VY		 4241
4242 return err;
4243}
4244EXPORT_SYMBOL(ndo_dflt_fdb_del);
4245
9e834259
NA		 4246static const struct nla_policy fdb_del_bulk_policy[NDA_MAX + 1] = {
4247 [NDA_VLAN] = { .type = NLA_U16 },
4248 [NDA_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
ea2c0f9e
NA		 4249 [NDA_NDM_STATE_MASK] = { .type = NLA_U16 },
4250 [NDA_NDM_FLAGS_MASK] = { .type = NLA_U8 },
9e834259
NA		 4251};
4252
c21ef3e3
DA		 4253static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4254 struct netlink_ext_ack *extack)
77162022 4255{
9e834259 4256 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
77162022 4257 struct net *net = sock_net(skb->sk);
9e834259 4258 const struct net_device_ops *ops;
77162022 4259 struct ndmsg *ndm;
1690be63 4260 struct nlattr *tb[NDA_MAX+1];
77162022 4261 struct net_device *dev;
9e834259 4262 __u8 *addr = NULL;
7d311801 4263 int err;
f6f6424b 4264 u16 vid;
77162022 4265
90f62cf3 4266 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 4267 return -EPERM;
4268
9e834259
NA		 4269 if (!del_bulk) {
4270 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX,
4271 NULL, extack);
4272 } else {
4273 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX,
4274 fdb_del_bulk_policy, extack);
4275 }
1690be63
VY		 4276 if (err < 0)
4277 return err;
77162022
JF		 4278
4279 ndm = nlmsg_data(nlh);
4280 if (ndm->ndm_ifindex == 0) {
b88d12e4 4281 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 4282 return -EINVAL;
4283 }
4284
4285 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4286 if (dev == NULL) {
b88d12e4 4287 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 4288 return -ENODEV;
4289 }
4290
9e834259
NA		 4291 if (!del_bulk) {
4292 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4293 NL_SET_ERR_MSG(extack, "invalid address");
4294 return -EINVAL;
4295 }
4296 addr = nla_data(tb[NDA_LLADDR]);
1690be63
VY		 4297 }
4298
da715775
IS		 4299 if (dev->type != ARPHRD_ETHER) {
4300 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4301 return -EINVAL;
4302 }
4303
b88d12e4 4304 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 4305 if (err)
4306 return err;
4307
77162022
JF		 4308 err = -EOPNOTSUPP;
4309
4310 /* Support fdb on master device the net/bridge default case */
4311 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2e92a2d0 4312 netif_is_bridge_port(dev)) {
898e5061 4313 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
77162022 4314
9e834259
NA		 4315 ops = br_dev->netdev_ops;
4316 if (!del_bulk) {
4317 if (ops->ndo_fdb_del)
ca4567f1 4318 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
9e834259
NA		 4319 } else {
4320 if (ops->ndo_fdb_del_bulk)
4321 err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
4322 extack);
4323 }
77162022
JF		 4324
4325 if (err)
4326 goto out;
4327 else
4328 ndm->ndm_flags &= ~NTF_MASTER;
4329 }
4330
4331 /* Embedded bridge, macvlan, and any other device support */
090096bf 4332 if (ndm->ndm_flags & NTF_SELF) {
9e834259
NA		 4333 ops = dev->netdev_ops;
4334 if (!del_bulk) {
4335 if (ops->ndo_fdb_del)
ca4567f1 4336 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
9e834259
NA		 4337 else
4338 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4339 } else {
4340 /* in case err was cleared by NTF_MASTER call */
4341 err = -EOPNOTSUPP;
4342 if (ops->ndo_fdb_del_bulk)
4343 err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
4344 extack);
4345 }
77162022 4346
3ff661c3 4347 if (!err) {
9e834259
NA		 4348 if (!del_bulk)
4349 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4350 ndm->ndm_state);
77162022 4351 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 4352 }
77162022
JF		 4353 }
4354out:
4355 return err;
4356}
4357
d83b0603
JF		 4358static int nlmsg_populate_fdb(struct sk_buff *skb,
4359 struct netlink_callback *cb,
4360 struct net_device *dev,
4361 int *idx,
4362 struct netdev_hw_addr_list *list)
4363{
4364 struct netdev_hw_addr *ha;
4365 int err;
15e47304 4366 u32 portid, seq;
d83b0603 4367
15e47304 4368 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 4369 seq = cb->nlh->nlmsg_seq;
4370
4371 list_for_each_entry(ha, &list->list, list) {
d297653d 4372 if (*idx < cb->args[2])
d83b0603
JF		 4373 goto skip;
4374
1e53d5bb 4375 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 4376 portid, seq,
1c104a6b 4377 RTM_NEWNEIGH, NTF_SELF,
b3379041 4378 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 4379 if (err < 0)
4380 return err;
4381skip:
4382 *idx += 1;
4383 }
4384 return 0;
4385}
4386
4387/**
2c53040f 4388 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
a986967e
BVA		 4389 * @skb: socket buffer to store message in
4390 * @cb: netlink callback
d83b0603 4391 * @dev: netdevice
a986967e
BVA		 4392 * @filter_dev: ignored
4393 * @idx: the number of FDB table entries dumped is added to *@idx
d83b0603
JF		 4394 *
4395 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 4396 * Returns number of addresses from list put in skb.
d83b0603
JF		 4397 */
4398int ndo_dflt_fdb_dump(struct sk_buff *skb,
4399 struct netlink_callback *cb,
4400 struct net_device *dev,
5d5eacb3 4401 struct net_device *filter_dev,
d297653d 4402 int *idx)
d83b0603
JF		 4403{
4404 int err;
4405
68883893
ED		 4406 if (dev->type != ARPHRD_ETHER)
4407 return -EINVAL;
4408
d83b0603 4409 netif_addr_lock_bh(dev);
d297653d 4410 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 4411 if (err)
4412 goto out;
2934c9db 4413 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 4414out:
4415 netif_addr_unlock_bh(dev);
d297653d 4416 return err;
d83b0603
JF		 4417}
4418EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4419
8c6e137f
DA		 4420static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4421 int *br_idx, int *brport_idx,
4422 struct netlink_ext_ack *extack)
4423{
4424 struct nlattr *tb[NDA_MAX + 1];
4425 struct ndmsg *ndm;
4426 int err, i;
4427
4428 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4429 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4430 return -EINVAL;
4431 }
4432
4433 ndm = nlmsg_data(nlh);
4434 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4435 ndm->ndm_flags || ndm->ndm_type) {
8b73018f 4436 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
8c6e137f
DA		 4437 return -EINVAL;
4438 }
4439
8cb08174
JB		 4440 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4441 NDA_MAX, NULL, extack);
8c6e137f
DA		 4442 if (err < 0)
4443 return err;
4444
4445 *brport_idx = ndm->ndm_ifindex;
4446 for (i = 0; i <= NDA_MAX; ++i) {
4447 if (!tb[i])
4448 continue;
4449
4450 switch (i) {
4451 case NDA_IFINDEX:
4452 if (nla_len(tb[i]) != sizeof(u32)) {
4453 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4454 return -EINVAL;
4455 }
4456 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4457 break;
4458 case NDA_MASTER:
4459 if (nla_len(tb[i]) != sizeof(u32)) {
4460 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4461 return -EINVAL;
4462 }
4463 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4464 break;
4465 default:
4466 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4467 return -EINVAL;
4468 }
4469 }
4470
4471 return 0;
4472}
4473
8dfbda19
DA		 4474static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4475 int *br_idx, int *brport_idx,
4476 struct netlink_ext_ack *extack)
77162022 4477{
5e6d2435 4478 struct nlattr *tb[IFLA_MAX+1];
8dfbda19 4479 int err;
5e6d2435 4480
bd961c9b
MFO		 4481 /* A hack to preserve kernel<->userspace interface.
4482 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4483 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4484 * So, check for ndmsg with an optional u32 attribute (not used here).
4485 * Fortunately these sizes don't conflict with the size of ifinfomsg
4486 * with an optional attribute.
4487 */
8dfbda19
DA		 4488 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4489 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
bd961c9b 4490 nla_attr_size(sizeof(u32)))) {
4565d7e5
DA		 4491 struct ifinfomsg *ifm;
4492
8cb08174
JB		 4493 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4494 tb, IFLA_MAX, ifla_policy,
4495 extack);
bd961c9b
MFO		 4496 if (err < 0) {
4497 return -EINVAL;
4498 } else if (err == 0) {
4499 if (tb[IFLA_MASTER])
8dfbda19 4500 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
bd961c9b 4501 }
5e6d2435 4502
4565d7e5 4503 ifm = nlmsg_data(nlh);
8dfbda19 4504 *brport_idx = ifm->ifi_index;
bd961c9b 4505 }
8dfbda19
DA		 4506 return 0;
4507}
4508
4509static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4510{
4511 struct net_device *dev;
4512 struct net_device *br_dev = NULL;
4513 const struct net_device_ops *ops = NULL;
4514 const struct net_device_ops *cops = NULL;
4515 struct net *net = sock_net(skb->sk);
4516 struct hlist_head *head;
4517 int brport_idx = 0;
4518 int br_idx = 0;
4519 int h, s_h;
4520 int idx = 0, s_idx;
4521 int err = 0;
4522 int fidx = 0;
4523
8c6e137f
DA		 4524 if (cb->strict_check)
4525 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4526 cb->extack);
4527 else
4528 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4529 cb->extack);
8dfbda19
DA		 4530 if (err < 0)
4531 return err;
5e6d2435
JHS		 4532
4533 if (br_idx) {
4534 br_dev = __dev_get_by_index(net, br_idx);
4535 if (!br_dev)
4536 return -ENODEV;
4537
4538 ops = br_dev->netdev_ops;
5e6d2435
JHS		 4539 }
4540
d297653d
RP		 4541 s_h = cb->args[0];
4542 s_idx = cb->args[1];
5e6d2435 4543
d297653d
RP		 4544 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4545 idx = 0;
4546 head = &net->dev_index_head[h];
4547 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 4548
d297653d 4549 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 4550 continue;
4551
d297653d 4552 if (!br_idx) { /* user did not specify a specific bridge */
2e92a2d0 4553 if (netif_is_bridge_port(dev)) {
d297653d
RP		 4554 br_dev = netdev_master_upper_dev_get(dev);
4555 cops = br_dev->netdev_ops;
4556 }
4557 } else {
4558 if (dev != br_dev &&
2e92a2d0 4559 !netif_is_bridge_port(dev))
d297653d 4560 continue;
5e6d2435 4561
d297653d 4562 if (br_dev != netdev_master_upper_dev_get(dev) &&
254ec036 4563 !netif_is_bridge_master(dev))
d297653d
RP		 4564 continue;
4565 cops = ops;
4566 }
77162022 4567
d297653d
RP		 4568 if (idx < s_idx)
4569 goto cont;
77162022 4570
2e92a2d0 4571 if (netif_is_bridge_port(dev)) {
d297653d
RP		 4572 if (cops && cops->ndo_fdb_dump) {
4573 err = cops->ndo_fdb_dump(skb, cb,
4574 br_dev, dev,
4575 &fidx);
4576 if (err == -EMSGSIZE)
4577 goto out;
4578 }
4579 }
5e6d2435 4580
d297653d
RP		 4581 if (dev->netdev_ops->ndo_fdb_dump)
4582 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4583 dev, NULL,
4584 &fidx);
4585 else
4586 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4587 &fidx);
4588 if (err == -EMSGSIZE)
4589 goto out;
4590
4591 cops = NULL;
4592
4593 /* reset fdb offset to 0 for rest of the interfaces */
4594 cb->args[2] = 0;
4595 fidx = 0;
4596cont:
4597 idx++;
4598 }
77162022 4599 }
77162022 4600
d297653d
RP		 4601out:
4602 cb->args[0] = h;
4603 cb->args[1] = idx;
4604 cb->args[2] = fidx;
4605
77162022
JF		 4606 return skb->len;
4607}
4608
5b2f94b2
RP		 4609static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4610 struct nlattr **tb, u8 *ndm_flags,
4611 int *br_idx, int *brport_idx, u8 **addr,
4612 u16 *vid, struct netlink_ext_ack *extack)
4613{
4614 struct ndmsg *ndm;
4615 int err, i;
4616
4617 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4618 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4619 return -EINVAL;
4620 }
4621
4622 ndm = nlmsg_data(nlh);
4623 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4624 ndm->ndm_type) {
4625 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4626 return -EINVAL;
4627 }
4628
4629 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4630 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4631 return -EINVAL;
4632 }
4633
8cb08174
JB		 4634 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4635 NDA_MAX, nda_policy, extack);
5b2f94b2
RP		 4636 if (err < 0)
4637 return err;
4638
4639 *ndm_flags = ndm->ndm_flags;
4640 *brport_idx = ndm->ndm_ifindex;
4641 for (i = 0; i <= NDA_MAX; ++i) {
4642 if (!tb[i])
4643 continue;
4644
4645 switch (i) {
4646 case NDA_MASTER:
4647 *br_idx = nla_get_u32(tb[i]);
4648 break;
4649 case NDA_LLADDR:
4650 if (nla_len(tb[i]) != ETH_ALEN) {
4651 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4652 return -EINVAL;
4653 }
4654 *addr = nla_data(tb[i]);
4655 break;
4656 case NDA_VLAN:
4657 err = fdb_vid_parse(tb[i], vid, extack);
4658 if (err)
4659 return err;
4660 break;
4661 case NDA_VNI:
4662 break;
4663 default:
4664 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4665 return -EINVAL;
4666 }
4667 }
4668
4669 return 0;
4670}
4671
4672static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4673 struct netlink_ext_ack *extack)
4674{
4675 struct net_device *dev = NULL, *br_dev = NULL;
4676 const struct net_device_ops *ops = NULL;
4677 struct net *net = sock_net(in_skb->sk);
4678 struct nlattr *tb[NDA_MAX + 1];
4679 struct sk_buff *skb;
4680 int brport_idx = 0;
4681 u8 ndm_flags = 0;
4682 int br_idx = 0;
4683 u8 *addr = NULL;
4684 u16 vid = 0;
4685 int err;
4686
4687 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4688 &brport_idx, &addr, &vid, extack);
4689 if (err < 0)
4690 return err;
4691
f989d03e
NA		 4692 if (!addr) {
4693 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4694 return -EINVAL;
4695 }
4696
5b2f94b2
RP		 4697 if (brport_idx) {
4698 dev = __dev_get_by_index(net, brport_idx);
4699 if (!dev) {
4700 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4701 return -ENODEV;
4702 }
4703 }
4704
4705 if (br_idx) {
4706 if (dev) {
4707 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4708 return -EINVAL;
4709 }
4710
4711 br_dev = __dev_get_by_index(net, br_idx);
4712 if (!br_dev) {
4713 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4714 return -EINVAL;
4715 }
4716 ops = br_dev->netdev_ops;
4717 }
4718
4719 if (dev) {
4720 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
2e92a2d0 4721 if (!netif_is_bridge_port(dev)) {
5b2f94b2
RP		 4722 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4723 return -EINVAL;
4724 }
4725 br_dev = netdev_master_upper_dev_get(dev);
4726 if (!br_dev) {
4727 NL_SET_ERR_MSG(extack, "Master of device not found");
4728 return -EINVAL;
4729 }
4730 ops = br_dev->netdev_ops;
4731 } else {
4732 if (!(ndm_flags & NTF_SELF)) {
4733 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4734 return -EINVAL;
4735 }
4736 ops = dev->netdev_ops;
4737 }
4738 }
4739
4740 if (!br_dev && !dev) {
4741 NL_SET_ERR_MSG(extack, "No device specified");
4742 return -ENODEV;
4743 }
4744
4745 if (!ops || !ops->ndo_fdb_get) {
4746 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4747 return -EOPNOTSUPP;
4748 }
4749
4750 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4751 if (!skb)
4752 return -ENOBUFS;
4753
4754 if (br_dev)
4755 dev = br_dev;
4756 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4757 NETLINK_CB(in_skb).portid,
4758 nlh->nlmsg_seq, extack);
4759 if (err)
4760 goto out;
4761
4762 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4763out:
4764 kfree_skb(skb);
4765 return err;
4766}
4767
2c3c031c
SF		 4768static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4769 unsigned int attrnum, unsigned int flag)
4770{
4771 if (mask & flag)
4772 return nla_put_u8(skb, attrnum, !!(flags & flag));
4773 return 0;
4774}
4775
815cccbf 4776int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 4777 struct net_device *dev, u16 mode,
7d4f8d87
SF		 4778 u32 flags, u32 mask, int nlflags,
4779 u32 filter_mask,
4780 int (*vlan_fill)(struct sk_buff *skb,
4781 struct net_device *dev,
4782 u32 filter_mask))
815cccbf
JF		 4783{
4784 struct nlmsghdr *nlh;
4785 struct ifinfomsg *ifm;
4786 struct nlattr *br_afspec;
2c3c031c 4787 struct nlattr *protinfo;
815cccbf 4788 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 4789 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 4790 int err = 0;
815cccbf 4791
46c264da 4792 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 4793 if (nlh == NULL)
4794 return -EMSGSIZE;
4795
4796 ifm = nlmsg_data(nlh);
4797 ifm->ifi_family = AF_BRIDGE;
4798 ifm->__ifi_pad = 0;
4799 ifm->ifi_type = dev->type;
4800 ifm->ifi_index = dev->ifindex;
4801 ifm->ifi_flags = dev_get_flags(dev);
4802 ifm->ifi_change = 0;
4803
4804
4805 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4806 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4807 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 4808 (br_dev &&
4809 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 4810 (dev->addr_len &&
4811 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 4812 (dev->ifindex != dev_get_iflink(dev) &&
4813 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 4814 goto nla_put_failure;
4815
ae0be8de 4816 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
815cccbf
JF		 4817 if (!br_afspec)
4818 goto nla_put_failure;
4819
1d460b98 4820 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 4821 nla_nest_cancel(skb, br_afspec);
4822 goto nla_put_failure;
4823 }
1d460b98
RP		 4824
4825 if (mode != BRIDGE_MODE_UNDEF) {
4826 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4827 nla_nest_cancel(skb, br_afspec);
4828 goto nla_put_failure;
4829 }
4830 }
7d4f8d87
SF		 4831 if (vlan_fill) {
4832 err = vlan_fill(skb, dev, filter_mask);
4833 if (err) {
4834 nla_nest_cancel(skb, br_afspec);
4835 goto nla_put_failure;
4836 }
4837 }
815cccbf
JF		 4838 nla_nest_end(skb, br_afspec);
4839
ae0be8de 4840 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
2c3c031c
SF		 4841 if (!protinfo)
4842 goto nla_put_failure;
4843
4844 if (brport_nla_put_flag(skb, flags, mask,
4845 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4846 brport_nla_put_flag(skb, flags, mask,
4847 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4848 brport_nla_put_flag(skb, flags, mask,
4849 IFLA_BRPORT_FAST_LEAVE,
4850 BR_MULTICAST_FAST_LEAVE) ||
4851 brport_nla_put_flag(skb, flags, mask,
4852 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4853 brport_nla_put_flag(skb, flags, mask,
4854 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4855 brport_nla_put_flag(skb, flags, mask,
4856 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4857 brport_nla_put_flag(skb, flags, mask,
4858 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4859 brport_nla_put_flag(skb, flags, mask,
583cb0b4
JW		 4860 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4861 brport_nla_put_flag(skb, flags, mask,
4862 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4863 brport_nla_put_flag(skb, flags, mask,
4864 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
2c3c031c
SF		 4865 nla_nest_cancel(skb, protinfo);
4866 goto nla_put_failure;
4867 }
4868
4869 nla_nest_end(skb, protinfo);
4870
053c095a
JB		 4871 nlmsg_end(skb, nlh);
4872 return 0;
815cccbf
JF		 4873nla_put_failure:
4874 nlmsg_cancel(skb, nlh);
7d4f8d87 4875 return err ? err : -EMSGSIZE;
815cccbf 4876}
7d4f8d87 4877EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 4878
2d011be8
DA		 4879static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4880 bool strict_check, u32 *filter_mask,
4881 struct netlink_ext_ack *extack)
4882{
4883 struct nlattr *tb[IFLA_MAX+1];
4884 int err, i;
4885
4886 if (strict_check) {
4887 struct ifinfomsg *ifm;
4888
4889 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4890 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4891 return -EINVAL;
4892 }
4893
4894 ifm = nlmsg_data(nlh);
4895 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4896 ifm->ifi_change || ifm->ifi_index) {
4897 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4898 return -EINVAL;
4899 }
4900
8cb08174
JB		 4901 err = nlmsg_parse_deprecated_strict(nlh,
4902 sizeof(struct ifinfomsg),
4903 tb, IFLA_MAX, ifla_policy,
4904 extack);
2d011be8 4905 } else {
8cb08174
JB		 4906 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4907 tb, IFLA_MAX, ifla_policy,
4908 extack);
2d011be8
DA		 4909 }
4910 if (err < 0)
4911 return err;
4912
4913 /* new attributes should only be added with strict checking */
4914 for (i = 0; i <= IFLA_MAX; ++i) {
4915 if (!tb[i])
4916 continue;
4917
4918 switch (i) {
4919 case IFLA_EXT_MASK:
4920 *filter_mask = nla_get_u32(tb[i]);
4921 break;
4922 default:
4923 if (strict_check) {
4924 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4925 return -EINVAL;
4926 }
4927 }
4928 }
4929
4930 return 0;
4931}
4932
e5a55a89
JF		 4933static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4934{
2d011be8 4935 const struct nlmsghdr *nlh = cb->nlh;
e5a55a89
JF		 4936 struct net *net = sock_net(skb->sk);
4937 struct net_device *dev;
4938 int idx = 0;
4939 u32 portid = NETLINK_CB(cb->skb).portid;
2d011be8 4940 u32 seq = nlh->nlmsg_seq;
6cbdceeb 4941 u32 filter_mask = 0;
d64f69b0 4942 int err;
6cbdceeb 4943
2d011be8
DA		 4944 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4945 cb->extack);
4946 if (err < 0 && cb->strict_check)
4947 return err;
e5a55a89
JF		 4948
4949 rcu_read_lock();
4950 for_each_netdev_rcu(net, dev) {
4951 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 4952 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 4953
898e5061 4954 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 4955 if (idx >= cb->args[0]) {
4956 err = br_dev->netdev_ops->ndo_bridge_getlink(
4957 skb, portid, seq, dev,
4958 filter_mask, NLM_F_MULTI);
f6c5775f
DA		 4959 if (err < 0 && err != -EOPNOTSUPP) {
4960 if (likely(skb->len))
4961 break;
4962
4963 goto out_err;
4964 }
d64f69b0 4965 }
25b1e679 4966 idx++;
e5a55a89
JF		 4967 }
4968
4969 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 4970 if (idx >= cb->args[0]) {
4971 err = ops->ndo_bridge_getlink(skb, portid,
4972 seq, dev,
4973 filter_mask,
4974 NLM_F_MULTI);
f6c5775f
DA		 4975 if (err < 0 && err != -EOPNOTSUPP) {
4976 if (likely(skb->len))
4977 break;
4978
4979 goto out_err;
4980 }
d64f69b0 4981 }
25b1e679 4982 idx++;
e5a55a89
JF		 4983 }
4984 }
f6c5775f
DA		 4985 err = skb->len;
4986out_err:
e5a55a89
JF		 4987 rcu_read_unlock();
4988 cb->args[0] = idx;
4989
f6c5775f 4990 return err;
e5a55a89
JF		 4991}
4992
2469ffd7
JF		 4993static inline size_t bridge_nlmsg_size(void)
4994{
4995 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4996 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4997 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4998 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4999 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
5000 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
5001 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
5002 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
5003 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
5004 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
5005 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
5006}
5007
02dba438 5008static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 5009{
5010 struct net *net = dev_net(dev);
2469ffd7
JF		 5011 struct sk_buff *skb;
5012 int err = -EOPNOTSUPP;
5013
02dba438
RP		 5014 if (!dev->netdev_ops->ndo_bridge_getlink)
5015 return 0;
5016
2469ffd7
JF		 5017 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
5018 if (!skb) {
5019 err = -ENOMEM;
5020 goto errout;
5021 }
5022
46c264da 5023 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 5024 if (err < 0)
5025 goto errout;
2469ffd7 5026
d2e381c4
IS		 5027 /* Notification info is only filled for bridge ports, not the bridge
5028 * device itself. Therefore, a zero notification length is valid and
5029 * should not result in an error.
5030 */
5031 if (!skb->len)
59ccaaaa
RP		 5032 goto errout;
5033
2469ffd7
JF		 5034 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
5035 return 0;
5036errout:
5037 WARN_ON(err == -EMSGSIZE);
5038 kfree_skb(skb);
59ccaaaa
RP		 5039 if (err)
5040 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 5041 return err;
5042}
5043
c21ef3e3
DA		 5044static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
5045 struct netlink_ext_ack *extack)
e5a55a89
JF		 5046{
5047 struct net *net = sock_net(skb->sk);
5048 struct ifinfomsg *ifm;
5049 struct net_device *dev;
2469ffd7
JF		 5050 struct nlattr *br_spec, *attr = NULL;
5051 int rem, err = -EOPNOTSUPP;
4de8b413 5052 u16 flags = 0;
c38e01b8 5053 bool have_flags = false;
e5a55a89
JF		 5054
5055 if (nlmsg_len(nlh) < sizeof(*ifm))
5056 return -EINVAL;
5057
5058 ifm = nlmsg_data(nlh);
5059 if (ifm->ifi_family != AF_BRIDGE)
5060 return -EPFNOSUPPORT;
5061
5062 dev = __dev_get_by_index(net, ifm->ifi_index);
5063 if (!dev) {
b88d12e4 5064 NL_SET_ERR_MSG(extack, "unknown ifindex");
e5a55a89
JF		 5065 return -ENODEV;
5066 }
5067
2469ffd7
JF		 5068 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5069 if (br_spec) {
5070 nla_for_each_nested(attr, br_spec, rem) {
5071 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 5072 if (nla_len(attr) < sizeof(flags))
5073 return -EINVAL;
5074
c38e01b8 5075 have_flags = true;
2469ffd7
JF		 5076 flags = nla_get_u16(attr);
5077 break;
5078 }
5079 }
5080 }
5081
5082 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 5083 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5084
5085 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 5086 err = -EOPNOTSUPP;
5087 goto out;
5088 }
5089
2fd527b7
PM		 5090 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
5091 extack);
e5a55a89
JF		 5092 if (err)
5093 goto out;
2469ffd7
JF		 5094
5095 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 5096 }
5097
2469ffd7
JF		 5098 if ((flags & BRIDGE_FLAGS_SELF)) {
5099 if (!dev->netdev_ops->ndo_bridge_setlink)
5100 err = -EOPNOTSUPP;
5101 else
add511b3 5102 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
2fd527b7
PM		 5103 flags,
5104 extack);
02dba438 5105 if (!err) {
2469ffd7 5106 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 5107
5108 /* Generate event to notify upper layer of bridge
5109 * change
5110 */
5111 err = rtnl_bridge_notify(dev);
5112 }
2469ffd7 5113 }
e5a55a89 5114
c38e01b8 5115 if (have_flags)
2469ffd7 5116 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 5117out:
5118 return err;
5119}
5120
c21ef3e3
DA		 5121static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
5122 struct netlink_ext_ack *extack)
407af329
VY		 5123{
5124 struct net *net = sock_net(skb->sk);
5125 struct ifinfomsg *ifm;
5126 struct net_device *dev;
5127 struct nlattr *br_spec, *attr = NULL;
5128 int rem, err = -EOPNOTSUPP;
4de8b413 5129 u16 flags = 0;
407af329
VY		 5130 bool have_flags = false;
5131
5132 if (nlmsg_len(nlh) < sizeof(*ifm))
5133 return -EINVAL;
5134
5135 ifm = nlmsg_data(nlh);
5136 if (ifm->ifi_family != AF_BRIDGE)
5137 return -EPFNOSUPPORT;
5138
5139 dev = __dev_get_by_index(net, ifm->ifi_index);
5140 if (!dev) {
b88d12e4 5141 NL_SET_ERR_MSG(extack, "unknown ifindex");
407af329
VY		 5142 return -ENODEV;
5143 }
5144
5145 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5146 if (br_spec) {
5147 nla_for_each_nested(attr, br_spec, rem) {
5148 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 5149 if (nla_len(attr) < sizeof(flags))
5150 return -EINVAL;
5151
407af329
VY		 5152 have_flags = true;
5153 flags = nla_get_u16(attr);
5154 break;
5155 }
5156 }
5157 }
5158
407af329
VY		 5159 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5160 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5161
5162 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
5163 err = -EOPNOTSUPP;
5164 goto out;
5165 }
5166
add511b3 5167 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 5168 if (err)
5169 goto out;
5170
5171 flags &= ~BRIDGE_FLAGS_MASTER;
5172 }
5173
5174 if ((flags & BRIDGE_FLAGS_SELF)) {
5175 if (!dev->netdev_ops->ndo_bridge_dellink)
5176 err = -EOPNOTSUPP;
5177 else
add511b3
RP		 5178 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
5179 flags);
407af329 5180
02dba438 5181 if (!err) {
407af329 5182 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 5183
5184 /* Generate event to notify upper layer of bridge
5185 * change
5186 */
5187 err = rtnl_bridge_notify(dev);
5188 }
407af329
VY		 5189 }
5190
5191 if (have_flags)
5192 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 5193out:
5194 return err;
5195}
5196
e8872a25
NA		 5197static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5198{
5199 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5200 (!idxattr || idxattr == attrid);
5201}
5202
f6e0fb81
PM		 5203static bool
5204rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
69ae6ad2 5205{
f6e0fb81
PM		 5206 return dev->netdev_ops &&
5207 dev->netdev_ops->ndo_has_offload_stats &&
5208 dev->netdev_ops->ndo_get_offload_stats &&
5209 dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
5210}
69ae6ad2 5211
f6e0fb81
PM		 5212static unsigned int
5213rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
5214{
5215 return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
5216 sizeof(struct rtnl_link_stats64) : 0;
69ae6ad2
NF		 5217}
5218
f6e0fb81
PM		 5219static int
5220rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
5221 struct sk_buff *skb)
69ae6ad2 5222{
f6e0fb81 5223 unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
69ae6ad2 5224 struct nlattr *attr = NULL;
69ae6ad2
NF		 5225 void *attr_data;
5226 int err;
5227
f6e0fb81 5228 if (!size)
69ae6ad2
NF		 5229 return -ENODATA;
5230
f6e0fb81
PM		 5231 attr = nla_reserve_64bit(skb, attr_id, size,
5232 IFLA_OFFLOAD_XSTATS_UNSPEC);
5233 if (!attr)
5234 return -EMSGSIZE;
69ae6ad2 5235
f6e0fb81
PM		 5236 attr_data = nla_data(attr);
5237 memset(attr_data, 0, size);
69ae6ad2 5238
f6e0fb81
PM		 5239 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
5240 if (err)
5241 return err;
69ae6ad2 5242
f6e0fb81
PM		 5243 return 0;
5244}
69ae6ad2 5245
0e7788fd
PM		 5246static unsigned int
5247rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
5248 enum netdev_offload_xstats_type type)
5249{
5250 bool enabled = netdev_offload_xstats_enabled(dev, type);
5251
5252 return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
5253}
5254
5255struct rtnl_offload_xstats_request_used {
5256 bool request;
5257 bool used;
5258};
5259
5260static int
5261rtnl_offload_xstats_get_stats(struct net_device *dev,
5262 enum netdev_offload_xstats_type type,
5263 struct rtnl_offload_xstats_request_used *ru,
5264 struct rtnl_hw_stats64 *stats,
5265 struct netlink_ext_ack *extack)
5266{
5267 bool request;
5268 bool used;
5269 int err;
5270
5271 request = netdev_offload_xstats_enabled(dev, type);
5272 if (!request) {
5273 used = false;
5274 goto out;
5275 }
5276
5277 err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
5278 if (err)
5279 return err;
5280
5281out:
5282 if (ru) {
5283 ru->request = request;
5284 ru->used = used;
5285 }
5286 return 0;
5287}
5288
5289static int
5290rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
5291 struct rtnl_offload_xstats_request_used *ru)
5292{
5293 struct nlattr *nest;
5294
5295 nest = nla_nest_start(skb, attr_id);
5296 if (!nest)
5297 return -EMSGSIZE;
5298
5299 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
5300 goto nla_put_failure;
5301
5302 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
5303 goto nla_put_failure;
5304
5305 nla_nest_end(skb, nest);
5306 return 0;
5307
5308nla_put_failure:
5309 nla_nest_cancel(skb, nest);
5310 return -EMSGSIZE;
5311}
5312
5313static int
5314rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
5315 struct netlink_ext_ack *extack)
5316{
5317 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5318 struct rtnl_offload_xstats_request_used ru_l3;
5319 struct nlattr *nest;
5320 int err;
5321
5322 err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
5323 if (err)
5324 return err;
5325
5326 nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5327 if (!nest)
5328 return -EMSGSIZE;
5329
5330 if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
5331 IFLA_OFFLOAD_XSTATS_L3_STATS,
5332 &ru_l3))
5333 goto nla_put_failure;
5334
5335 nla_nest_end(skb, nest);
5336 return 0;
5337
5338nla_put_failure:
5339 nla_nest_cancel(skb, nest);
5340 return -EMSGSIZE;
5341}
5342
f6e0fb81 5343static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
05415bcc
PM		 5344 int *prividx, u32 off_filter_mask,
5345 struct netlink_ext_ack *extack)
f6e0fb81 5346{
0e7788fd
PM		 5347 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5348 int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
5349 int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
f6e0fb81
PM		 5350 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5351 bool have_data = false;
5352 int err;
5353
46efc97b
PM		 5354 if (*prividx <= attr_id_cpu_hit &&
5355 (off_filter_mask &
5356 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
f6e0fb81
PM		 5357 err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
5358 if (!err) {
5359 have_data = true;
5360 } else if (err != -ENODATA) {
5361 *prividx = attr_id_cpu_hit;
5362 return err;
5363 }
69ae6ad2
NF		 5364 }
5365
0e7788fd
PM		 5366 if (*prividx <= attr_id_hw_s_info &&
5367 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
5368 *prividx = attr_id_hw_s_info;
5369
5370 err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
5371 if (err)
5372 return err;
5373
5374 have_data = true;
5375 *prividx = 0;
5376 }
5377
5378 if (*prividx <= attr_id_l3_stats &&
5379 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
5380 unsigned int size_l3;
5381 struct nlattr *attr;
5382
5383 *prividx = attr_id_l3_stats;
5384
5385 size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
23cfe941
PM		 5386 if (!size_l3)
5387 goto skip_l3_stats;
0e7788fd
PM		 5388 attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
5389 IFLA_OFFLOAD_XSTATS_UNSPEC);
5390 if (!attr)
5391 return -EMSGSIZE;
5392
5393 err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
5394 nla_data(attr), extack);
5395 if (err)
5396 return err;
5397
5398 have_data = true;
23cfe941 5399skip_l3_stats:
0e7788fd
PM		 5400 *prividx = 0;
5401 }
5402
f6e0fb81 5403 if (!have_data)
69ae6ad2
NF		 5404 return -ENODATA;
5405
5406 *prividx = 0;
5407 return 0;
69ae6ad2
NF		 5408}
5409
0e7788fd
PM		 5410static unsigned int
5411rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
5412 enum netdev_offload_xstats_type type)
5413{
5414 bool enabled = netdev_offload_xstats_enabled(dev, type);
5415
5416 return nla_total_size(0) +
5417 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
5418 nla_total_size(sizeof(u8)) +
5419 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
5420 (enabled ? nla_total_size(sizeof(u8)) : 0) +
5421 0;
5422}
5423
5424static unsigned int
5425rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
5426{
5427 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5428
5429 return nla_total_size(0) +
5430 /* IFLA_OFFLOAD_XSTATS_L3_STATS */
5431 rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
5432 0;
5433}
5434
46efc97b
PM		 5435static int rtnl_offload_xstats_get_size(const struct net_device *dev,
5436 u32 off_filter_mask)
69ae6ad2 5437{
0e7788fd 5438 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
f6e0fb81 5439 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
69ae6ad2 5440 int nla_size = 0;
69ae6ad2
NF		 5441 int size;
5442
46efc97b
PM		 5443 if (off_filter_mask &
5444 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
5445 size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
5446 nla_size += nla_total_size_64bit(size);
5447 }
69ae6ad2 5448
0e7788fd
PM		 5449 if (off_filter_mask &
5450 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
5451 nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
5452
5453 if (off_filter_mask &
5454 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
5455 size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5456 nla_size += nla_total_size_64bit(size);
5457 }
5458
69ae6ad2
NF		 5459 if (nla_size != 0)
5460 nla_size += nla_total_size(0);
5461
5462 return nla_size;
5463}
5464
46efc97b
PM		 5465struct rtnl_stats_dump_filters {
5466 /* mask[0] filters outer attributes. Then individual nests have their
5467 * filtering mask at the index of the nested attribute.
5468 */
5469 u32 mask[IFLA_STATS_MAX + 1];
5470};
5471
10c9ead9
RP		 5472static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5473 int type, u32 pid, u32 seq, u32 change,
46efc97b
PM		 5474 unsigned int flags,
5475 const struct rtnl_stats_dump_filters *filters,
05415bcc
PM		 5476 int *idxattr, int *prividx,
5477 struct netlink_ext_ack *extack)
10c9ead9 5478{
46efc97b 5479 unsigned int filter_mask = filters->mask[0];
10c9ead9
RP		 5480 struct if_stats_msg *ifsm;
5481 struct nlmsghdr *nlh;
5482 struct nlattr *attr;
e8872a25 5483 int s_prividx = *prividx;
69ae6ad2 5484 int err;
10c9ead9
RP		 5485
5486 ASSERT_RTNL();
5487
5488 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5489 if (!nlh)
5490 return -EMSGSIZE;
5491
5492 ifsm = nlmsg_data(nlh);
ce024f42
NA		 5493 ifsm->family = PF_UNSPEC;
5494 ifsm->pad1 = 0;
5495 ifsm->pad2 = 0;
10c9ead9
RP		 5496 ifsm->ifindex = dev->ifindex;
5497 ifsm->filter_mask = filter_mask;
5498
e8872a25 5499 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 5500 struct rtnl_link_stats64 *sp;
10c9ead9 5501
58414d32
ND		 5502 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5503 sizeof(struct rtnl_link_stats64),
5504 IFLA_STATS_UNSPEC);
216e6906
PM		 5505 if (!attr) {
5506 err = -EMSGSIZE;
10c9ead9 5507 goto nla_put_failure;
216e6906 5508 }
10c9ead9
RP		 5509
5510 sp = nla_data(attr);
5511 dev_get_stats(dev, sp);
5512 }
5513
97a47fac
NA		 5514 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5515 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5516
5517 if (ops && ops->fill_linkxstats) {
97a47fac 5518 *idxattr = IFLA_STATS_LINK_XSTATS;
ae0be8de
MK		 5519 attr = nla_nest_start_noflag(skb,
5520 IFLA_STATS_LINK_XSTATS);
216e6906
PM		 5521 if (!attr) {
5522 err = -EMSGSIZE;
97a47fac 5523 goto nla_put_failure;
216e6906 5524 }
97a47fac 5525
80e73cc5
NA		 5526 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5527 nla_nest_end(skb, attr);
5528 if (err)
5529 goto nla_put_failure;
5530 *idxattr = 0;
5531 }
5532 }
5533
5534 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5535 *idxattr)) {
5536 const struct rtnl_link_ops *ops = NULL;
5537 const struct net_device *master;
5538
5539 master = netdev_master_upper_dev_get(dev);
5540 if (master)
5541 ops = master->rtnl_link_ops;
5542 if (ops && ops->fill_linkxstats) {
80e73cc5 5543 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
ae0be8de
MK		 5544 attr = nla_nest_start_noflag(skb,
5545 IFLA_STATS_LINK_XSTATS_SLAVE);
216e6906
PM		 5546 if (!attr) {
5547 err = -EMSGSIZE;
80e73cc5 5548 goto nla_put_failure;
216e6906 5549 }
80e73cc5
NA		 5550
5551 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 5552 nla_nest_end(skb, attr);
5553 if (err)
5554 goto nla_put_failure;
5555 *idxattr = 0;
5556 }
5557 }
5558
69ae6ad2
NF		 5559 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5560 *idxattr)) {
46efc97b
PM		 5561 u32 off_filter_mask;
5562
5563 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
69ae6ad2 5564 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
ae0be8de
MK		 5565 attr = nla_nest_start_noflag(skb,
5566 IFLA_STATS_LINK_OFFLOAD_XSTATS);
216e6906
PM		 5567 if (!attr) {
5568 err = -EMSGSIZE;
69ae6ad2 5569 goto nla_put_failure;
216e6906 5570 }
69ae6ad2 5571
46efc97b 5572 err = rtnl_offload_xstats_fill(skb, dev, prividx,
05415bcc 5573 off_filter_mask, extack);
69ae6ad2
NF		 5574 if (err == -ENODATA)
5575 nla_nest_cancel(skb, attr);
5576 else
5577 nla_nest_end(skb, attr);
5578
5579 if (err && err != -ENODATA)
5580 goto nla_put_failure;
5581 *idxattr = 0;
5582 }
5583
aefb4d4a
RS		 5584 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5585 struct rtnl_af_ops *af_ops;
5586
5587 *idxattr = IFLA_STATS_AF_SPEC;
ae0be8de 5588 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
216e6906
PM		 5589 if (!attr) {
5590 err = -EMSGSIZE;
aefb4d4a 5591 goto nla_put_failure;
216e6906 5592 }
aefb4d4a 5593
5fa85a09
FW		 5594 rcu_read_lock();
5595 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 5596 if (af_ops->fill_stats_af) {
5597 struct nlattr *af;
aefb4d4a 5598
ae0be8de
MK		 5599 af = nla_nest_start_noflag(skb,
5600 af_ops->family);
5fa85a09
FW		 5601 if (!af) {
5602 rcu_read_unlock();
57d29a29 5603 err = -EMSGSIZE;
aefb4d4a 5604 goto nla_put_failure;
5fa85a09 5605 }
aefb4d4a
RS		 5606 err = af_ops->fill_stats_af(skb, dev);
5607
5fa85a09 5608 if (err == -ENODATA) {
aefb4d4a 5609 nla_nest_cancel(skb, af);
5fa85a09
FW		 5610 } else if (err < 0) {
5611 rcu_read_unlock();
aefb4d4a 5612 goto nla_put_failure;
5fa85a09 5613 }
aefb4d4a
RS		 5614
5615 nla_nest_end(skb, af);
5616 }
5617 }
5fa85a09 5618 rcu_read_unlock();
aefb4d4a
RS		 5619
5620 nla_nest_end(skb, attr);
5621
5622 *idxattr = 0;
5623 }
5624
10c9ead9
RP		 5625 nlmsg_end(skb, nlh);
5626
5627 return 0;
5628
5629nla_put_failure:
e8872a25
NA		 5630 /* not a multi message or no progress mean a real error */
5631 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5632 nlmsg_cancel(skb, nlh);
5633 else
5634 nlmsg_end(skb, nlh);
10c9ead9 5635
216e6906 5636 return err;
10c9ead9
RP		 5637}
5638
10c9ead9 5639static size_t if_nlmsg_stats_size(const struct net_device *dev,
46efc97b 5640 const struct rtnl_stats_dump_filters *filters)
10c9ead9 5641{
d3436799 5642 size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
46efc97b 5643 unsigned int filter_mask = filters->mask[0];
10c9ead9 5644
e8872a25 5645 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 5646 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5647
97a47fac
NA		 5648 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5649 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 5650 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 5651
5652 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 5653 size += nla_total_size(ops->get_linkxstats_size(dev,
5654 attr));
97a47fac
NA		 5655 /* for IFLA_STATS_LINK_XSTATS */
5656 size += nla_total_size(0);
5657 }
5658 }
5659
80e73cc5
NA		 5660 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5661 struct net_device *_dev = (struct net_device *)dev;
5662 const struct rtnl_link_ops *ops = NULL;
5663 const struct net_device *master;
5664
5665 /* netdev_master_upper_dev_get can't take const */
5666 master = netdev_master_upper_dev_get(_dev);
5667 if (master)
5668 ops = master->rtnl_link_ops;
5669 if (ops && ops->get_linkxstats_size) {
5670 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5671
5672 size += nla_total_size(ops->get_linkxstats_size(dev,
5673 attr));
5674 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5675 size += nla_total_size(0);
5676 }
5677 }
5678
46efc97b
PM		 5679 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
5680 u32 off_filter_mask;
5681
5682 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5683 size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
5684 }
69ae6ad2 5685
aefb4d4a
RS		 5686 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5687 struct rtnl_af_ops *af_ops;
5688
5689 /* for IFLA_STATS_AF_SPEC */
5690 size += nla_total_size(0);
5691
5fa85a09
FW		 5692 rcu_read_lock();
5693 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 5694 if (af_ops->get_stats_af_size) {
5695 size += nla_total_size(
5696 af_ops->get_stats_af_size(dev));
5697
5698 /* for AF_* */
5699 size += nla_total_size(0);
5700 }
5701 }
5fa85a09 5702 rcu_read_unlock();
aefb4d4a
RS		 5703 }
5704
10c9ead9
RP		 5705 return size;
5706}
5707
46efc97b
PM		 5708#define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
5709
5710static const struct nla_policy
5711rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
5712 [IFLA_STATS_LINK_OFFLOAD_XSTATS] =
5713 NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
5714};
5715
5716static const struct nla_policy
5717rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
5718 [IFLA_STATS_GET_FILTERS] =
5719 NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
5720};
5721
03ba3566
PM		 5722static const struct nla_policy
5723ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
5fd0b838 5724 [IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
03ba3566
PM		 5725};
5726
46efc97b
PM		 5727static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
5728 struct rtnl_stats_dump_filters *filters,
5729 struct netlink_ext_ack *extack)
5730{
5731 struct nlattr *tb[IFLA_STATS_MAX + 1];
5732 int err;
5733 int at;
5734
5735 err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
5736 rtnl_stats_get_policy_filters, extack);
5737 if (err < 0)
5738 return err;
5739
5740 for (at = 1; at <= IFLA_STATS_MAX; at++) {
5741 if (tb[at]) {
5742 if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
5743 NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
5744 return -EINVAL;
5745 }
5746 filters->mask[at] = nla_get_u32(tb[at]);
5747 }
5748 }
5749
5750 return 0;
5751}
5752
5753static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
5754 u32 filter_mask,
5755 struct rtnl_stats_dump_filters *filters,
5756 struct netlink_ext_ack *extack)
5757{
5758 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5759 int err;
5760 int i;
5761
5762 filters->mask[0] = filter_mask;
5763 for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
5764 filters->mask[i] = -1U;
5765
5766 err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
5767 IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
5768 if (err < 0)
5769 return err;
5770
5771 if (tb[IFLA_STATS_GET_FILTERS]) {
5772 err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
5773 filters, extack);
5774 if (err)
5775 return err;
5776 }
5777
5778 return 0;
5779}
5780
51bc860d
JK		 5781static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5782 bool is_dump, struct netlink_ext_ack *extack)
5783{
5784 struct if_stats_msg *ifsm;
5785
69f23a09 5786 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
51bc860d
JK		 5787 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5788 return -EINVAL;
5789 }
5790
5791 if (!strict_check)
5792 return 0;
5793
5794 ifsm = nlmsg_data(nlh);
5795
5796 /* only requests using strict checks can pass data to influence
5797 * the dump. The legacy exception is filter_mask.
5798 */
5799 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5800 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5801 return -EINVAL;
5802 }
6300acb2
JK		 5803 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5804 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5805 return -EINVAL;
5806 }
51bc860d
JK		 5807
5808 return 0;
5809}
5810
c21ef3e3
DA		 5811static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5812 struct netlink_ext_ack *extack)
10c9ead9 5813{
46efc97b 5814 struct rtnl_stats_dump_filters filters;
10c9ead9 5815 struct net *net = sock_net(skb->sk);
10c9ead9 5816 struct net_device *dev = NULL;
e8872a25
NA		 5817 int idxattr = 0, prividx = 0;
5818 struct if_stats_msg *ifsm;
10c9ead9 5819 struct sk_buff *nskb;
10c9ead9
RP		 5820 int err;
5821
51bc860d
JK		 5822 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5823 false, extack);
5824 if (err)
5825 return err;
4775cc1f 5826
10c9ead9
RP		 5827 ifsm = nlmsg_data(nlh);
5828 if (ifsm->ifindex > 0)
5829 dev = __dev_get_by_index(net, ifsm->ifindex);
5830 else
5831 return -EINVAL;
5832
5833 if (!dev)
5834 return -ENODEV;
5835
46efc97b 5836 if (!ifsm->filter_mask) {
22b67d17 5837 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
10c9ead9 5838 return -EINVAL;
22b67d17 5839 }
10c9ead9 5840
46efc97b
PM		 5841 err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
5842 if (err)
5843 return err;
5844
5845 nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
10c9ead9
RP		 5846 if (!nskb)
5847 return -ENOBUFS;
5848
5849 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5850 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
05415bcc 5851 0, &filters, &idxattr, &prividx, extack);
10c9ead9
RP		 5852 if (err < 0) {
5853 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5854 WARN_ON(err == -EMSGSIZE);
5855 kfree_skb(nskb);
5856 } else {
5857 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5858 }
5859
5860 return err;
5861}
5862
5863static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5864{
841891ec 5865 struct netlink_ext_ack *extack = cb->extack;
e8872a25 5866 int h, s_h, err, s_idx, s_idxattr, s_prividx;
46efc97b 5867 struct rtnl_stats_dump_filters filters;
10c9ead9 5868 struct net *net = sock_net(skb->sk);
e8872a25 5869 unsigned int flags = NLM_F_MULTI;
10c9ead9 5870 struct if_stats_msg *ifsm;
10c9ead9 5871 struct hlist_head *head;
e8872a25 5872 struct net_device *dev;
e8872a25 5873 int idx = 0;
10c9ead9
RP		 5874
5875 s_h = cb->args[0];
5876 s_idx = cb->args[1];
e8872a25
NA		 5877 s_idxattr = cb->args[2];
5878 s_prividx = cb->args[3];
10c9ead9
RP		 5879
5880 cb->seq = net->dev_base_seq;
5881
51bc860d
JK		 5882 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5883 if (err)
5884 return err;
4775cc1f 5885
10c9ead9 5886 ifsm = nlmsg_data(cb->nlh);
46efc97b 5887 if (!ifsm->filter_mask) {
841891ec 5888 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
10c9ead9 5889 return -EINVAL;
841891ec 5890 }
10c9ead9 5891
46efc97b
PM		 5892 err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
5893 extack);
5894 if (err)
5895 return err;
5896
10c9ead9
RP		 5897 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5898 idx = 0;
5899 head = &net->dev_index_head[h];
5900 hlist_for_each_entry(dev, head, index_hlist) {
5901 if (idx < s_idx)
5902 goto cont;
5903 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5904 NETLINK_CB(cb->skb).portid,
5905 cb->nlh->nlmsg_seq, 0,
46efc97b 5906 flags, &filters,
05415bcc
PM		 5907 &s_idxattr, &s_prividx,
5908 extack);
10c9ead9
RP		 5909 /* If we ran out of room on the first message,
5910 * we're in trouble
5911 */
5912 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5913
5914 if (err < 0)
5915 goto out;
e8872a25
NA		 5916 s_prividx = 0;
5917 s_idxattr = 0;
10c9ead9
RP		 5918 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5919cont:
5920 idx++;
5921 }
5922 }
5923out:
e8872a25
NA		 5924 cb->args[3] = s_prividx;
5925 cb->args[2] = s_idxattr;
10c9ead9
RP		 5926 cb->args[1] = idx;
5927 cb->args[0] = h;
5928
5929 return skb->len;
5930}
5931
5fd0b838
PM		 5932void rtnl_offload_xstats_notify(struct net_device *dev)
5933{
5934 struct rtnl_stats_dump_filters response_filters = {};
5935 struct net *net = dev_net(dev);
5936 int idxattr = 0, prividx = 0;
5937 struct sk_buff *skb;
5938 int err = -ENOBUFS;
5939
5940 ASSERT_RTNL();
5941
5942 response_filters.mask[0] |=
5943 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
5944 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
5945 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5946
5947 skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
5948 GFP_KERNEL);
5949 if (!skb)
5950 goto errout;
5951
5952 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
5953 &response_filters, &idxattr, &prividx, NULL);
5954 if (err < 0) {
5955 kfree_skb(skb);
5956 goto errout;
5957 }
5958
5959 rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
5960 return;
5961
5962errout:
5963 rtnl_set_sk_err(net, RTNLGRP_STATS, err);
5964}
5965EXPORT_SYMBOL(rtnl_offload_xstats_notify);
5966
03ba3566
PM		 5967static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
5968 struct netlink_ext_ack *extack)
5969{
5fd0b838 5970 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
03ba3566
PM		 5971 struct rtnl_stats_dump_filters response_filters = {};
5972 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5973 struct net *net = sock_net(skb->sk);
5974 struct net_device *dev = NULL;
03ba3566 5975 struct if_stats_msg *ifsm;
5fd0b838 5976 bool notify = false;
03ba3566
PM		 5977 int err;
5978
5979 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5980 false, extack);
5981 if (err)
5982 return err;
5983
5984 ifsm = nlmsg_data(nlh);
5985 if (ifsm->family != AF_UNSPEC) {
5986 NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
5987 return -EINVAL;
5988 }
5989
5990 if (ifsm->ifindex > 0)
5991 dev = __dev_get_by_index(net, ifsm->ifindex);
5992 else
5993 return -EINVAL;
5994
5995 if (!dev)
5996 return -ENODEV;
5997
5998 if (ifsm->filter_mask) {
5999 NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
6000 return -EINVAL;
6001 }
6002
6003 err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
6004 ifla_stats_set_policy, extack);
6005 if (err < 0)
6006 return err;
6007
5fd0b838
PM		 6008 if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
6009 u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
03ba3566 6010
5fd0b838
PM		 6011 if (req)
6012 err = netdev_offload_xstats_enable(dev, t_l3, extack);
6013 else
6014 err = netdev_offload_xstats_disable(dev, t_l3);
6015
6016 if (!err)
6017 notify = true;
6018 else if (err != -EALREADY)
6019 return err;
6020
6021 response_filters.mask[0] |=
6022 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
6023 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
6024 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
03ba3566
PM		 6025 }
6026
5fd0b838
PM		 6027 if (notify)
6028 rtnl_offload_xstats_notify(dev);
6029
6030 return 0;
03ba3566
PM		 6031}
6032
1da177e4
LT		 6033/* Process one rtnetlink message. */
6034
2d4bc933
JB		 6035static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
6036 struct netlink_ext_ack *extack)
1da177e4 6037{
3b1e0a65 6038 struct net *net = sock_net(skb->sk);
addf9b90 6039 struct rtnl_link *link;
12dc5c2c 6040 enum rtnl_kinds kind;
e4202511 6041 struct module *owner;
6853dd48 6042 int err = -EOPNOTSUPP;
e2849863 6043 rtnl_doit_func doit;
62256f98 6044 unsigned int flags;
1da177e4
LT		 6045 int family;
6046 int type;
1da177e4 6047
1da177e4 6048 type = nlh->nlmsg_type;
1da177e4 6049 if (type > RTM_MAX)
038890fe 6050 return -EOPNOTSUPP;
1da177e4
LT		 6051
6052 type -= RTM_BASE;
6053
6054 /* All the messages must have at least 1 byte length */
573ce260 6055 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 6056 return 0;
6057
573ce260 6058 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
2e9ea3e3 6059 kind = rtnl_msgtype_kind(type);
1da177e4 6060
12dc5c2c 6061 if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 6062 return -EPERM;
1da177e4 6063
6853dd48 6064 rcu_read_lock();
12dc5c2c 6065 if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
97c53cac 6066 struct sock *rtnl;
e2849863 6067 rtnl_dumpit_func dumpit;
ebfe3c51 6068 u32 min_dump_alloc = 0;
1da177e4 6069
addf9b90
FW		 6070 link = rtnl_get_link(family, type);
6071 if (!link || !link->dumpit) {
6853dd48 6072 family = PF_UNSPEC;
addf9b90
FW		 6073 link = rtnl_get_link(family, type);
6074 if (!link || !link->dumpit)
6853dd48
FW		 6075 goto err_unlock;
6076 }
e4202511 6077 owner = link->owner;
addf9b90 6078 dumpit = link->dumpit;
e1fa6d21 6079
5c2bb9b6 6080 if (type == RTM_GETLINK - RTM_BASE)
e1fa6d21 6081 min_dump_alloc = rtnl_calcit(skb, nlh);
9ac4a169 6082
e4202511
FW		 6083 err = 0;
6084 /* need to do this before rcu_read_unlock() */
6085 if (!try_module_get(owner))
6086 err = -EPROTONOSUPPORT;
6087
6853dd48
FW		 6088 rcu_read_unlock();
6089
97c53cac 6090 rtnl = net->rtnl;
e4202511 6091 if (err == 0) {
80d326fa
PNA		 6092 struct netlink_dump_control c = {
6093 .dump = dumpit,
6094 .min_dump_alloc = min_dump_alloc,
e4202511 6095 .module = owner,
80d326fa
PNA		 6096 };
6097 err = netlink_dump_start(rtnl, skb, nlh, &c);
e4202511
FW		 6098 /* netlink_dump_start() will keep a reference on
6099 * module if dump is still in progress.
6100 */
6101 module_put(owner);
80d326fa 6102 }
2907c35f 6103 return err;
1da177e4
LT		 6104 }
6105
addf9b90
FW		 6106 link = rtnl_get_link(family, type);
6107 if (!link || !link->doit) {
8caa38b5 6108 family = PF_UNSPEC;
addf9b90
FW		 6109 link = rtnl_get_link(PF_UNSPEC, type);
6110 if (!link || !link->doit)
6111 goto out_unlock;
8caa38b5
FW		 6112 }
6113
e4202511
FW		 6114 owner = link->owner;
6115 if (!try_module_get(owner)) {
6116 err = -EPROTONOSUPPORT;
6117 goto out_unlock;
6118 }
6119
addf9b90 6120 flags = link->flags;
a6cec0bc
NA		 6121 if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) &&
6122 !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) {
6123 NL_SET_ERR_MSG(extack, "Bulk delete is not supported");
5b22f627 6124 module_put(owner);
a6cec0bc
NA		 6125 goto err_unlock;
6126 }
6127
62256f98 6128 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
addf9b90 6129 doit = link->doit;
62256f98
FW		 6130 rcu_read_unlock();
6131 if (doit)
6132 err = doit(skb, nlh, extack);
e4202511 6133 module_put(owner);
62256f98
FW		 6134 return err;
6135 }
6853dd48 6136 rcu_read_unlock();
1da177e4 6137
6853dd48 6138 rtnl_lock();
addf9b90
FW		 6139 link = rtnl_get_link(family, type);
6140 if (link && link->doit)
6141 err = link->doit(skb, nlh, extack);
0cc09020 6142 rtnl_unlock();
addf9b90 6143
e4202511
FW		 6144 module_put(owner);
6145
addf9b90
FW		 6146 return err;
6147
6148out_unlock:
6149 rcu_read_unlock();
0cc09020
FW		 6150 return err;
6151
6152err_unlock:
6853dd48 6153 rcu_read_unlock();
0cc09020 6154 return -EOPNOTSUPP;
1da177e4
LT		 6155}
6156
cd40b7d3 6157static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 6158{
cd40b7d3 6159 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1da177e4
LT		 6160}
6161
5f729eaa
JG		 6162static int rtnetlink_bind(struct net *net, int group)
6163{
6164 switch (group) {
6165 case RTNLGRP_IPV4_MROUTE_R:
6166 case RTNLGRP_IPV6_MROUTE_R:
6167 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
6168 return -EPERM;
6169 break;
6170 }
6171 return 0;
6172}
6173
1da177e4
LT		 6174static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
6175{
351638e7 6176 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 6177
1da177e4 6178 switch (event) {
5138e86f 6179 case NETDEV_REBOOT:
8a212589 6180 case NETDEV_CHANGEMTU:
3753654e 6181 case NETDEV_CHANGEADDR:
5138e86f
VY		 6182 case NETDEV_CHANGENAME:
6183 case NETDEV_FEAT_CHANGE:
6184 case NETDEV_BONDING_FAILOVER:
e6e66594 6185 case NETDEV_POST_TYPE_CHANGE:
5138e86f 6186 case NETDEV_NOTIFY_PEERS:
dc709f37 6187 case NETDEV_CHANGEUPPER:
5138e86f 6188 case NETDEV_RESEND_IGMP:
5138e86f 6189 case NETDEV_CHANGEINFODATA:
eeda3fb9 6190 case NETDEV_CHANGELOWERSTATE:
ebdcf045 6191 case NETDEV_CHANGE_TX_QUEUE_LEN:
3d3ea5af 6192 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
1d997f10 6193 GFP_KERNEL, NULL, 0, 0, NULL);
1da177e4
LT		 6194 break;
6195 default:
1da177e4
LT		 6196 break;
6197 }
6198 return NOTIFY_DONE;
6199}
6200
6201static struct notifier_block rtnetlink_dev_notifier = {
6202 .notifier_call = rtnetlink_event,
6203};
6204
97c53cac 6205
2c8c1e72 6206static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 6207{
6208 struct sock *sk;
a31f2d17
PNA		 6209 struct netlink_kernel_cfg cfg = {
6210 .groups = RTNLGRP_MAX,
6211 .input = rtnetlink_rcv,
6212 .cb_mutex = &rtnl_mutex,
9785e10a 6213 .flags = NL_CFG_F_NONROOT_RECV,
5f729eaa 6214 .bind = rtnetlink_bind,
a31f2d17
PNA		 6215 };
6216
9f00d977 6217 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 6218 if (!sk)
6219 return -ENOMEM;
97c53cac
DL		 6220 net->rtnl = sk;
6221 return 0;
6222}
6223
2c8c1e72 6224static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 6225{
775516bf
DL		 6226 netlink_kernel_release(net->rtnl);
6227 net->rtnl = NULL;
97c53cac
DL		 6228}
6229
6230static struct pernet_operations rtnetlink_net_ops = {
6231 .init = rtnetlink_net_init,
6232 .exit = rtnetlink_net_exit,
6233};
6234
1da177e4
LT		 6235void __init rtnetlink_init(void)
6236{
97c53cac 6237 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 6238 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 6239
1da177e4 6240 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 6241
c7ac8679 6242 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
b97bac64
FW		 6243 rtnl_dump_ifinfo, 0);
6244 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
6245 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
6246 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
687ad8cc 6247
b97bac64
FW		 6248 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
6249 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
6250 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
77162022 6251
36fbf1e5
JP		 6252 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
6253 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
6254
b97bac64 6255 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
9e834259
NA		 6256 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL,
6257 RTNL_FLAG_BULK_DEL_SUPPORTED);
5b2f94b2 6258 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
e5a55a89 6259
b97bac64
FW		 6260 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
6261 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
6262 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
10c9ead9
RP		 6263
6264 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
b97bac64 6265 0);
03ba3566 6266 rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);
1da177e4 6267}
Linux 6.x block layer and io_uring tree(s)