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net: core: rcu-ify rtnl af_ops
[linux-2.6-block.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
ee5d032f 19#include <linux/bitops.h>
1da177e4
LT		 20#include <linux/errno.h>
21#include <linux/module.h>
22#include <linux/types.h>
23#include <linux/socket.h>
24#include <linux/kernel.h>
1da177e4
LT		 25#include <linux/timer.h>
26#include <linux/string.h>
27#include <linux/sockios.h>
28#include <linux/net.h>
29#include <linux/fcntl.h>
30#include <linux/mm.h>
31#include <linux/slab.h>
32#include <linux/interrupt.h>
33#include <linux/capability.h>
34#include <linux/skbuff.h>
35#include <linux/init.h>
36#include <linux/security.h>
6756ae4b 37#include <linux/mutex.h>
1823730f 38#include <linux/if_addr.h>
77162022 39#include <linux/if_bridge.h>
f6f6424b 40#include <linux/if_vlan.h>
ebc08a6f 41#include <linux/pci.h>
77162022 42#include <linux/etherdevice.h>
58038695 43#include <linux/bpf.h>
1da177e4 44
7c0f6ba6 45#include <linux/uaccess.h>
1da177e4
LT		 46
47#include <linux/inet.h>
48#include <linux/netdevice.h>
82f28412 49#include <net/switchdev.h>
1da177e4
LT		 50#include <net/ip.h>
51#include <net/protocol.h>
52#include <net/arp.h>
53#include <net/route.h>
54#include <net/udp.h>
ea697639 55#include <net/tcp.h>
1da177e4
LT		 56#include <net/sock.h>
57#include <net/pkt_sched.h>
14c0b97d 58#include <net/fib_rules.h>
e2849863 59#include <net/rtnetlink.h>
30ffee84 60#include <net/net_namespace.h>
1da177e4 61
e0d087af 62struct rtnl_link {
e2849863
TG		 63 rtnl_doit_func doit;
64 rtnl_dumpit_func dumpit;
62256f98 65 unsigned int flags;
e2849863
TG		 66};
67
6756ae4b 68static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 69
70void rtnl_lock(void)
71{
6756ae4b 72 mutex_lock(&rtnl_mutex);
1da177e4 73}
e0d087af 74EXPORT_SYMBOL(rtnl_lock);
1da177e4 75
1b5c5493
ED		 76static struct sk_buff *defer_kfree_skb_list;
77void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
78{
79 if (head && tail) {
80 tail->next = defer_kfree_skb_list;
81 defer_kfree_skb_list = head;
82 }
83}
84EXPORT_SYMBOL(rtnl_kfree_skbs);
85
6756ae4b 86void __rtnl_unlock(void)
1da177e4 87{
1b5c5493
ED		 88 struct sk_buff *head = defer_kfree_skb_list;
89
90 defer_kfree_skb_list = NULL;
91
6756ae4b 92 mutex_unlock(&rtnl_mutex);
1b5c5493
ED		 93
94 while (head) {
95 struct sk_buff *next = head->next;
96
97 kfree_skb(head);
98 cond_resched();
99 head = next;
100 }
1da177e4 101}
6756ae4b 102
1da177e4
LT		 103void rtnl_unlock(void)
104{
58ec3b4d 105 /* This fellow will unlock it for us. */
1da177e4
LT		 106 netdev_run_todo();
107}
e0d087af 108EXPORT_SYMBOL(rtnl_unlock);
1da177e4 109
6756ae4b
SH		 110int rtnl_trylock(void)
111{
112 return mutex_trylock(&rtnl_mutex);
113}
e0d087af 114EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 115
c9c1014b
PM		 116int rtnl_is_locked(void)
117{
118 return mutex_is_locked(&rtnl_mutex);
119}
e0d087af 120EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 121
a898def2 122#ifdef CONFIG_PROVE_LOCKING
0cbf3343 123bool lockdep_rtnl_is_held(void)
a898def2
PM		 124{
125 return lockdep_is_held(&rtnl_mutex);
126}
127EXPORT_SYMBOL(lockdep_rtnl_is_held);
128#endif /* #ifdef CONFIG_PROVE_LOCKING */
129
6853dd48 130static struct rtnl_link __rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
019a3169 131static refcount_t rtnl_msg_handlers_ref[RTNL_FAMILY_MAX + 1];
e2849863
TG		 132
133static inline int rtm_msgindex(int msgtype)
134{
135 int msgindex = msgtype - RTM_BASE;
136
137 /*
138 * msgindex < 0 implies someone tried to register a netlink
139 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
140 * the message type has not been added to linux/rtnetlink.h
141 */
142 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
143
144 return msgindex;
145}
146
e2849863
TG		 147/**
148 * __rtnl_register - Register a rtnetlink message type
149 * @protocol: Protocol family or PF_UNSPEC
150 * @msgtype: rtnetlink message type
151 * @doit: Function pointer called for each request message
152 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
b97bac64 153 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
e2849863
TG		 154 *
155 * Registers the specified function pointers (at least one of them has
156 * to be non-NULL) to be called whenever a request message for the
157 * specified protocol family and message type is received.
158 *
159 * The special protocol family PF_UNSPEC may be used to define fallback
160 * function pointers for the case when no entry for the specific protocol
161 * family exists.
162 *
163 * Returns 0 on success or a negative error code.
164 */
165int __rtnl_register(int protocol, int msgtype,
c7ac8679 166 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
b97bac64 167 unsigned int flags)
e2849863
TG		 168{
169 struct rtnl_link *tab;
170 int msgindex;
171
25239cee 172 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 173 msgindex = rtm_msgindex(msgtype);
174
377cb248 175 tab = rcu_dereference_raw(rtnl_msg_handlers[protocol]);
e2849863
TG		 176 if (tab == NULL) {
177 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
178 if (tab == NULL)
179 return -ENOBUFS;
180
6853dd48 181 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
e2849863
TG		 182 }
183
184 if (doit)
185 tab[msgindex].doit = doit;
e2849863
TG		 186 if (dumpit)
187 tab[msgindex].dumpit = dumpit;
62256f98 188 tab[msgindex].flags |= flags;
e2849863
TG		 189
190 return 0;
191}
e2849863
TG		 192EXPORT_SYMBOL_GPL(__rtnl_register);
193
194/**
195 * rtnl_register - Register a rtnetlink message type
196 *
197 * Identical to __rtnl_register() but panics on failure. This is useful
198 * as failure of this function is very unlikely, it can only happen due
199 * to lack of memory when allocating the chain to store all message
200 * handlers for a protocol. Meant for use in init functions where lack
25985edc 201 * of memory implies no sense in continuing.
e2849863
TG		 202 */
203void rtnl_register(int protocol, int msgtype,
c7ac8679 204 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
b97bac64 205 unsigned int flags)
e2849863 206{
b97bac64 207 if (__rtnl_register(protocol, msgtype, doit, dumpit, flags) < 0)
e2849863
TG		 208 panic("Unable to register rtnetlink message handler, "
209 "protocol = %d, message type = %d\n",
210 protocol, msgtype);
211}
e2849863
TG		 212EXPORT_SYMBOL_GPL(rtnl_register);
213
214/**
215 * rtnl_unregister - Unregister a rtnetlink message type
216 * @protocol: Protocol family or PF_UNSPEC
217 * @msgtype: rtnetlink message type
218 *
219 * Returns 0 on success or a negative error code.
220 */
221int rtnl_unregister(int protocol, int msgtype)
222{
6853dd48 223 struct rtnl_link *handlers;
e2849863
TG		 224 int msgindex;
225
25239cee 226 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 227 msgindex = rtm_msgindex(msgtype);
228
6853dd48
FW		 229 rtnl_lock();
230 handlers = rtnl_dereference(rtnl_msg_handlers[protocol]);
231 if (!handlers) {
232 rtnl_unlock();
e2849863 233 return -ENOENT;
6853dd48 234 }
e2849863 235
6853dd48
FW		 236 handlers[msgindex].doit = NULL;
237 handlers[msgindex].dumpit = NULL;
62256f98 238 handlers[msgindex].flags = 0;
6853dd48 239 rtnl_unlock();
e2849863
TG		 240
241 return 0;
242}
e2849863
TG		 243EXPORT_SYMBOL_GPL(rtnl_unregister);
244
245/**
246 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
247 * @protocol : Protocol family or PF_UNSPEC
248 *
249 * Identical to calling rtnl_unregster() for all registered message types
250 * of a certain protocol family.
251 */
252void rtnl_unregister_all(int protocol)
253{
019a3169
FW		 254 struct rtnl_link *handlers;
255
25239cee 256 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863 257
019a3169 258 rtnl_lock();
6853dd48
FW		 259 handlers = rtnl_dereference(rtnl_msg_handlers[protocol]);
260 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
019a3169
FW		 261 rtnl_unlock();
262
6853dd48
FW		 263 synchronize_net();
264
d38a6512 265 while (refcount_read(&rtnl_msg_handlers_ref[protocol]) > 1)
019a3169
FW		 266 schedule();
267 kfree(handlers);
e2849863 268}
e2849863 269EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 270
38f7b870
PM		 271static LIST_HEAD(link_ops);
272
c63044f0
ED		 273static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
274{
275 const struct rtnl_link_ops *ops;
276
277 list_for_each_entry(ops, &link_ops, list) {
278 if (!strcmp(ops->kind, kind))
279 return ops;
280 }
281 return NULL;
282}
283
38f7b870
PM		 284/**
285 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
286 * @ops: struct rtnl_link_ops * to register
287 *
288 * The caller must hold the rtnl_mutex. This function should be used
289 * by drivers that create devices during module initialization. It
290 * must be called before registering the devices.
291 *
292 * Returns 0 on success or a negative error code.
293 */
294int __rtnl_link_register(struct rtnl_link_ops *ops)
295{
c63044f0
ED		 296 if (rtnl_link_ops_get(ops->kind))
297 return -EEXIST;
298
b0ab2fab
JP		 299 /* The check for setup is here because if ops
300 * does not have that filled up, it is not possible
301 * to use the ops for creating device. So do not
302 * fill up dellink as well. That disables rtnl_dellink.
303 */
304 if (ops->setup && !ops->dellink)
23289a37 305 ops->dellink = unregister_netdevice_queue;
2d85cba2 306
38f7b870
PM		 307 list_add_tail(&ops->list, &link_ops);
308 return 0;
309}
38f7b870
PM		 310EXPORT_SYMBOL_GPL(__rtnl_link_register);
311
312/**
313 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
314 * @ops: struct rtnl_link_ops * to register
315 *
316 * Returns 0 on success or a negative error code.
317 */
318int rtnl_link_register(struct rtnl_link_ops *ops)
319{
320 int err;
321
322 rtnl_lock();
323 err = __rtnl_link_register(ops);
324 rtnl_unlock();
325 return err;
326}
38f7b870
PM		 327EXPORT_SYMBOL_GPL(rtnl_link_register);
328
669f87ba
PE		 329static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
330{
331 struct net_device *dev;
23289a37
ED		 332 LIST_HEAD(list_kill);
333
669f87ba 334 for_each_netdev(net, dev) {
23289a37
ED		 335 if (dev->rtnl_link_ops == ops)
336 ops->dellink(dev, &list_kill);
669f87ba 337 }
23289a37 338 unregister_netdevice_many(&list_kill);
669f87ba
PE		 339}
340
38f7b870
PM		 341/**
342 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
343 * @ops: struct rtnl_link_ops * to unregister
344 *
2d85cba2 345 * The caller must hold the rtnl_mutex.
38f7b870
PM		 346 */
347void __rtnl_link_unregister(struct rtnl_link_ops *ops)
348{
881d966b 349 struct net *net;
2d85cba2 350
881d966b 351 for_each_net(net) {
669f87ba 352 __rtnl_kill_links(net, ops);
2d85cba2 353 }
38f7b870
PM		 354 list_del(&ops->list);
355}
38f7b870
PM		 356EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
357
200b916f
CW		 358/* Return with the rtnl_lock held when there are no network
359 * devices unregistering in any network namespace.
360 */
361static void rtnl_lock_unregistering_all(void)
362{
363 struct net *net;
364 bool unregistering;
ff960a73 365 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 366
ff960a73 367 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 368 for (;;) {
200b916f
CW		 369 unregistering = false;
370 rtnl_lock();
371 for_each_net(net) {
372 if (net->dev_unreg_count > 0) {
373 unregistering = true;
374 break;
375 }
376 }
377 if (!unregistering)
378 break;
379 __rtnl_unlock();
ff960a73
PZ		 380
381 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 382 }
ff960a73 383 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 384}
385
38f7b870
PM		 386/**
387 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
388 * @ops: struct rtnl_link_ops * to unregister
389 */
390void rtnl_link_unregister(struct rtnl_link_ops *ops)
391{
200b916f
CW		 392 /* Close the race with cleanup_net() */
393 mutex_lock(&net_mutex);
394 rtnl_lock_unregistering_all();
38f7b870
PM		 395 __rtnl_link_unregister(ops);
396 rtnl_unlock();
200b916f 397 mutex_unlock(&net_mutex);
38f7b870 398}
38f7b870
PM		 399EXPORT_SYMBOL_GPL(rtnl_link_unregister);
400
ba7d49b1
JP		 401static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
402{
403 struct net_device *master_dev;
404 const struct rtnl_link_ops *ops;
8515ae38 405 size_t size = 0;
ba7d49b1 406
8515ae38
FW		 407 rcu_read_lock();
408
409 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
ba7d49b1 410 if (!master_dev)
8515ae38
FW		 411 goto out;
412
ba7d49b1 413 ops = master_dev->rtnl_link_ops;
6049f253 414 if (!ops || !ops->get_slave_size)
8515ae38 415 goto out;
ba7d49b1 416 /* IFLA_INFO_SLAVE_DATA + nested data */
8515ae38 417 size = nla_total_size(sizeof(struct nlattr)) +
ba7d49b1 418 ops->get_slave_size(master_dev, dev);
8515ae38
FW		 419
420out:
421 rcu_read_unlock();
422 return size;
ba7d49b1
JP		 423}
424
38f7b870
PM		 425static size_t rtnl_link_get_size(const struct net_device *dev)
426{
427 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
428 size_t size;
429
430 if (!ops)
431 return 0;
432
369cf77a
TG		 433 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
434 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 435
436 if (ops->get_size)
437 /* IFLA_INFO_DATA + nested data */
369cf77a 438 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 439 ops->get_size(dev);
440
441 if (ops->get_xstats_size)
369cf77a
TG		 442 /* IFLA_INFO_XSTATS */
443 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 444
ba7d49b1
JP		 445 size += rtnl_link_get_slave_info_data_size(dev);
446
38f7b870
PM		 447 return size;
448}
449
f8ff182c
TG		 450static LIST_HEAD(rtnl_af_ops);
451
452static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
453{
454 const struct rtnl_af_ops *ops;
455
5fa85a09 456 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
f8ff182c
TG		 457 if (ops->family == family)
458 return ops;
459 }
460
461 return NULL;
462}
463
f8ff182c
TG		 464/**
465 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
466 * @ops: struct rtnl_af_ops * to register
467 *
468 * Returns 0 on success or a negative error code.
469 */
3678a9d8 470void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 471{
f8ff182c 472 rtnl_lock();
5fa85a09 473 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
f8ff182c 474 rtnl_unlock();
f8ff182c
TG		 475}
476EXPORT_SYMBOL_GPL(rtnl_af_register);
477
f8ff182c
TG		 478/**
479 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
480 * @ops: struct rtnl_af_ops * to unregister
481 */
482void rtnl_af_unregister(struct rtnl_af_ops *ops)
483{
484 rtnl_lock();
5fa85a09 485 list_del_rcu(&ops->list);
f8ff182c 486 rtnl_unlock();
5fa85a09
FW		 487
488 synchronize_rcu();
f8ff182c
TG		 489}
490EXPORT_SYMBOL_GPL(rtnl_af_unregister);
491
b1974ed0
AR		 492static size_t rtnl_link_get_af_size(const struct net_device *dev,
493 u32 ext_filter_mask)
f8ff182c
TG		 494{
495 struct rtnl_af_ops *af_ops;
496 size_t size;
497
498 /* IFLA_AF_SPEC */
499 size = nla_total_size(sizeof(struct nlattr));
500
5fa85a09
FW		 501 rcu_read_lock();
502 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
f8ff182c
TG		 503 if (af_ops->get_link_af_size) {
504 /* AF_* + nested data */
505 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 506 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 507 }
508 }
5fa85a09 509 rcu_read_unlock();
f8ff182c
TG		 510
511 return size;
512}
513
ba7d49b1 514static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 515{
ba7d49b1 516 struct net_device *master_dev;
4c82a95e 517 bool ret = false;
38f7b870 518
4c82a95e
FW		 519 rcu_read_lock();
520
521 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
813f020c 522 if (master_dev && master_dev->rtnl_link_ops)
4c82a95e
FW		 523 ret = true;
524 rcu_read_unlock();
525 return ret;
ba7d49b1
JP		 526}
527
528static int rtnl_link_slave_info_fill(struct sk_buff *skb,
529 const struct net_device *dev)
530{
531 struct net_device *master_dev;
532 const struct rtnl_link_ops *ops;
533 struct nlattr *slave_data;
534 int err;
38f7b870 535
ba7d49b1
JP		 536 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
537 if (!master_dev)
538 return 0;
539 ops = master_dev->rtnl_link_ops;
540 if (!ops)
541 return 0;
542 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
543 return -EMSGSIZE;
544 if (ops->fill_slave_info) {
545 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
546 if (!slave_data)
547 return -EMSGSIZE;
548 err = ops->fill_slave_info(skb, master_dev, dev);
549 if (err < 0)
550 goto err_cancel_slave_data;
551 nla_nest_end(skb, slave_data);
552 }
553 return 0;
554
555err_cancel_slave_data:
556 nla_nest_cancel(skb, slave_data);
557 return err;
558}
559
560static int rtnl_link_info_fill(struct sk_buff *skb,
561 const struct net_device *dev)
562{
563 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
564 struct nlattr *data;
565 int err;
566
567 if (!ops)
568 return 0;
38f7b870 569 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 570 return -EMSGSIZE;
38f7b870
PM		 571 if (ops->fill_xstats) {
572 err = ops->fill_xstats(skb, dev);
573 if (err < 0)
ba7d49b1 574 return err;
38f7b870
PM		 575 }
576 if (ops->fill_info) {
577 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 578 if (data == NULL)
579 return -EMSGSIZE;
38f7b870
PM		 580 err = ops->fill_info(skb, dev);
581 if (err < 0)
582 goto err_cancel_data;
583 nla_nest_end(skb, data);
584 }
38f7b870
PM		 585 return 0;
586
587err_cancel_data:
588 nla_nest_cancel(skb, data);
ba7d49b1
JP		 589 return err;
590}
591
592static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
593{
594 struct nlattr *linkinfo;
595 int err = -EMSGSIZE;
596
597 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
598 if (linkinfo == NULL)
599 goto out;
600
601 err = rtnl_link_info_fill(skb, dev);
602 if (err < 0)
603 goto err_cancel_link;
604
605 err = rtnl_link_slave_info_fill(skb, dev);
606 if (err < 0)
607 goto err_cancel_link;
608
609 nla_nest_end(skb, linkinfo);
610 return 0;
611
38f7b870
PM		 612err_cancel_link:
613 nla_nest_cancel(skb, linkinfo);
614out:
615 return err;
616}
617
95c96174 618int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 619{
97c53cac 620 struct sock *rtnl = net->rtnl;
1da177e4
LT		 621 int err = 0;
622
ac6d439d 623 NETLINK_CB(skb).dst_group = group;
1da177e4 624 if (echo)
63354797 625 refcount_inc(&skb->users);
1da177e4
LT		 626 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
627 if (echo)
628 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
629 return err;
630}
631
97c53cac 632int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 633{
97c53cac
DL		 634 struct sock *rtnl = net->rtnl;
635
2942e900
TG		 636 return nlmsg_unicast(rtnl, skb, pid);
637}
e0d087af 638EXPORT_SYMBOL(rtnl_unicast);
2942e900 639
1ce85fe4
PNA		 640void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
641 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 642{
97c53cac 643 struct sock *rtnl = net->rtnl;
97676b6b
TG		 644 int report = 0;
645
646 if (nlh)
647 report = nlmsg_report(nlh);
648
1ce85fe4 649 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 650}
e0d087af 651EXPORT_SYMBOL(rtnl_notify);
97676b6b 652
97c53cac 653void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 654{
97c53cac
DL		 655 struct sock *rtnl = net->rtnl;
656
97676b6b
TG		 657 netlink_set_err(rtnl, 0, group, error);
658}
e0d087af 659EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 660
1da177e4
LT		 661int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
662{
2d7202bf
TG		 663 struct nlattr *mx;
664 int i, valid = 0;
665
666 mx = nla_nest_start(skb, RTA_METRICS);
667 if (mx == NULL)
668 return -ENOBUFS;
669
670 for (i = 0; i < RTAX_MAX; i++) {
671 if (metrics[i]) {
ea697639
DB		 672 if (i == RTAX_CC_ALGO - 1) {
673 char tmp[TCP_CA_NAME_MAX], *name;
674
675 name = tcp_ca_get_name_by_key(metrics[i], tmp);
676 if (!name)
677 continue;
678 if (nla_put_string(skb, i + 1, name))
679 goto nla_put_failure;
c3a8d947
DB		 680 } else if (i == RTAX_FEATURES - 1) {
681 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
682
f8edcd12
PS		 683 if (!user_features)
684 continue;
c3a8d947
DB		 685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
686 if (nla_put_u32(skb, i + 1, user_features))
687 goto nla_put_failure;
ea697639
DB		 688 } else {
689 if (nla_put_u32(skb, i + 1, metrics[i]))
690 goto nla_put_failure;
691 }
2d7202bf 692 valid++;
2d7202bf 693 }
1da177e4 694 }
1da177e4 695
a57d27fc
DM		 696 if (!valid) {
697 nla_nest_cancel(skb, mx);
698 return 0;
699 }
2d7202bf
TG		 700
701 return nla_nest_end(skb, mx);
702
703nla_put_failure:
bc3ed28c
TG		 704 nla_nest_cancel(skb, mx);
705 return -EMSGSIZE;
1da177e4 706}
e0d087af 707EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 708
e3703b3d 709int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 710 long expires, u32 error)
e3703b3d
TG		 711{
712 struct rta_cacheinfo ci = {
a399a805 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 714 .rta_used = dst->__use,
715 .rta_clntref = atomic_read(&(dst->__refcnt)),
716 .rta_error = error,
717 .rta_id = id,
e3703b3d
TG		 718 };
719
8253947e
LW		 720 if (expires) {
721 unsigned long clock;
e3703b3d 722
8253947e
LW		 723 clock = jiffies_to_clock_t(abs(expires));
724 clock = min_t(unsigned long, clock, INT_MAX);
725 ci.rta_expires = (expires > 0) ? clock : -clock;
726 }
e3703b3d
TG		 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
728}
e3703b3d 729EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 730
93b2d4a2 731static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 732{
733 unsigned char operstate = dev->operstate;
734
e0d087af 735 switch (transition) {
b00055aa
SR		 736 case IF_OPER_UP:
737 if ((operstate == IF_OPER_DORMANT ||
738 operstate == IF_OPER_UNKNOWN) &&
739 !netif_dormant(dev))
740 operstate = IF_OPER_UP;
741 break;
742
743 case IF_OPER_DORMANT:
744 if (operstate == IF_OPER_UP ||
745 operstate == IF_OPER_UNKNOWN)
746 operstate = IF_OPER_DORMANT;
747 break;
3ff50b79 748 }
b00055aa
SR		 749
750 if (dev->operstate != operstate) {
751 write_lock_bh(&dev_base_lock);
752 dev->operstate = operstate;
753 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 754 netdev_state_change(dev);
755 }
b00055aa
SR		 756}
757
b1beb681
JB		 758static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
759{
760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
762}
763
3729d502
PM		 764static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
765 const struct ifinfomsg *ifm)
766{
767 unsigned int flags = ifm->ifi_flags;
768
769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
770 if (ifm->ifi_change)
771 flags = (flags & ifm->ifi_change) |
b1beb681 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 773
774 return flags;
775}
776
b60c5115 777static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 778 const struct rtnl_link_stats64 *b)
1da177e4 779{
b60c5115
TG		 780 a->rx_packets = b->rx_packets;
781 a->tx_packets = b->tx_packets;
782 a->rx_bytes = b->rx_bytes;
783 a->tx_bytes = b->tx_bytes;
784 a->rx_errors = b->rx_errors;
785 a->tx_errors = b->tx_errors;
786 a->rx_dropped = b->rx_dropped;
787 a->tx_dropped = b->tx_dropped;
788
789 a->multicast = b->multicast;
790 a->collisions = b->collisions;
791
792 a->rx_length_errors = b->rx_length_errors;
793 a->rx_over_errors = b->rx_over_errors;
794 a->rx_crc_errors = b->rx_crc_errors;
795 a->rx_frame_errors = b->rx_frame_errors;
796 a->rx_fifo_errors = b->rx_fifo_errors;
797 a->rx_missed_errors = b->rx_missed_errors;
798
799 a->tx_aborted_errors = b->tx_aborted_errors;
800 a->tx_carrier_errors = b->tx_carrier_errors;
801 a->tx_fifo_errors = b->tx_fifo_errors;
802 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
803 a->tx_window_errors = b->tx_window_errors;
804
805 a->rx_compressed = b->rx_compressed;
806 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 807
808 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 809}
810
c02db8c6 811/* All VF info */
115c9b81
GR		 812static inline int rtnl_vfinfo_size(const struct net_device *dev,
813 u32 ext_filter_mask)
ebc08a6f 814{
9af15c38 815 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 816 int num_vfs = dev_num_vf(dev->dev.parent);
7e75f74a 817 size_t size = nla_total_size(0);
045de01a 818 size += num_vfs *
7e75f74a
SD		 819 (nla_total_size(0) +
820 nla_total_size(sizeof(struct ifla_vf_mac)) +
821 nla_total_size(sizeof(struct ifla_vf_vlan)) +
822 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
79aab093
MS		 823 nla_total_size(MAX_VLAN_LIST_LEN *
824 sizeof(struct ifla_vf_vlan_info)) +
ed616689 825 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
7e75f74a 826 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
945a3676 827 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 828 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8 829 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
7e75f74a 830 nla_total_size(0) + /* nest IFLA_VF_STATS */
3b766cd8 831 /* IFLA_VF_STATS_RX_PACKETS */
343a6d8e 832 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 833 /* IFLA_VF_STATS_TX_PACKETS */
343a6d8e 834 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 835 /* IFLA_VF_STATS_RX_BYTES */
343a6d8e 836 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 837 /* IFLA_VF_STATS_TX_BYTES */
343a6d8e 838 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 839 /* IFLA_VF_STATS_BROADCAST */
343a6d8e 840 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 841 /* IFLA_VF_STATS_MULTICAST */
343a6d8e 842 nla_total_size_64bit(sizeof(__u64)) +
dd461d6a 843 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 844 return size;
845 } else
ebc08a6f
WM		 846 return 0;
847}
848
c53864fd
DG		 849static size_t rtnl_port_size(const struct net_device *dev,
850 u32 ext_filter_mask)
57b61080
SF		 851{
852 size_t port_size = nla_total_size(4) /* PORT_VF */
853 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
57b61080
SF		 854 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
855 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
856 + nla_total_size(1) /* PROT_VDP_REQUEST */
857 + nla_total_size(2); /* PORT_VDP_RESPONSE */
858 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
859 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
860 + port_size;
861 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
862 + port_size;
863
c53864fd
DG		 864 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
865 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 866 return 0;
867 if (dev_num_vf(dev->dev.parent))
868 return port_self_size + vf_ports_size +
869 vf_port_size * dev_num_vf(dev->dev.parent);
870 else
871 return port_self_size;
872}
873
b5cdae32 874static size_t rtnl_xdp_size(void)
d1fdd913 875{
b3cfaa31 876 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
58038695
MKL		 877 nla_total_size(1) + /* XDP_ATTACHED */
878 nla_total_size(4); /* XDP_PROG_ID */
d1fdd913 879
b5cdae32 880 return xdp_size;
d1fdd913
BB		 881}
882
115c9b81
GR		 883static noinline size_t if_nlmsg_size(const struct net_device *dev,
884 u32 ext_filter_mask)
339bf98f
TG		 885{
886 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
887 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 888 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 889 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 890 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 891 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 892 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 893 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
894 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
895 + nla_total_size(4) /* IFLA_TXQLEN */
896 + nla_total_size(4) /* IFLA_WEIGHT */
897 + nla_total_size(4) /* IFLA_MTU */
898 + nla_total_size(4) /* IFLA_LINK */
899 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 900 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 901 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 902 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
903 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
6919756c
TK		 904 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
905 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
339bf98f 906 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 907 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 908 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 909 + nla_total_size(4) /* IFLA_LINK_NETNSID */
db833d40 910 + nla_total_size(4) /* IFLA_GROUP */
115c9b81
GR		 911 + nla_total_size(ext_filter_mask
912 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
913 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 914 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 915 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 916 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 917 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 918 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 919 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
b5cdae32 920 + rtnl_xdp_size() /* IFLA_XDP */
3d3ea5af 921 + nla_total_size(4) /* IFLA_EVENT */
6621dd29 922 + nla_total_size(4) /* IFLA_NEW_NETNSID */
88d6378b
AK		 923 + nla_total_size(1); /* IFLA_PROTO_DOWN */
924
339bf98f
TG		 925}
926
57b61080
SF		 927static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
928{
929 struct nlattr *vf_ports;
930 struct nlattr *vf_port;
931 int vf;
932 int err;
933
934 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
935 if (!vf_ports)
936 return -EMSGSIZE;
937
938 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
939 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 940 if (!vf_port)
941 goto nla_put_failure;
a6574349
DM		 942 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
943 goto nla_put_failure;
57b61080 944 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 945 if (err == -EMSGSIZE)
946 goto nla_put_failure;
57b61080 947 if (err) {
57b61080
SF		 948 nla_nest_cancel(skb, vf_port);
949 continue;
950 }
951 nla_nest_end(skb, vf_port);
952 }
953
954 nla_nest_end(skb, vf_ports);
955
956 return 0;
8ca94183
SF		 957
958nla_put_failure:
959 nla_nest_cancel(skb, vf_ports);
960 return -EMSGSIZE;
57b61080
SF		 961}
962
963static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
964{
965 struct nlattr *port_self;
966 int err;
967
968 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
969 if (!port_self)
970 return -EMSGSIZE;
971
972 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
973 if (err) {
974 nla_nest_cancel(skb, port_self);
8ca94183 975 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 976 }
977
978 nla_nest_end(skb, port_self);
979
980 return 0;
981}
982
c53864fd
DG		 983static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
984 u32 ext_filter_mask)
57b61080
SF		 985{
986 int err;
987
c53864fd
DG		 988 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
989 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 990 return 0;
991
992 err = rtnl_port_self_fill(skb, dev);
993 if (err)
994 return err;
995
996 if (dev_num_vf(dev->dev.parent)) {
997 err = rtnl_vf_ports_fill(skb, dev);
998 if (err)
999 return err;
1000 }
1001
1002 return 0;
1003}
1004
66cae9ed
JP		 1005static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1006{
1007 int err;
02637fce 1008 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1009
1010 err = dev_get_phys_port_id(dev, &ppid);
1011 if (err) {
1012 if (err == -EOPNOTSUPP)
1013 return 0;
1014 return err;
1015 }
1016
1017 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1018 return -EMSGSIZE;
1019
1020 return 0;
1021}
1022
db24a904
DA		 1023static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1024{
1025 char name[IFNAMSIZ];
1026 int err;
1027
1028 err = dev_get_phys_port_name(dev, name, sizeof(name));
1029 if (err) {
1030 if (err == -EOPNOTSUPP)
1031 return 0;
1032 return err;
1033 }
1034
77ef033b 1035 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
db24a904
DA		 1036 return -EMSGSIZE;
1037
1038 return 0;
1039}
1040
82f28412
JP		 1041static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1042{
1043 int err;
f8e20a9f 1044 struct switchdev_attr attr = {
6ff64f6f 1045 .orig_dev = dev,
1f868398 1046 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1047 .flags = SWITCHDEV_F_NO_RECURSE,
1048 };
82f28412 1049
f8e20a9f 1050 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1051 if (err) {
1052 if (err == -EOPNOTSUPP)
1053 return 0;
1054 return err;
1055 }
1056
42275bd8
SF		 1057 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1058 attr.u.ppid.id))
82f28412
JP		 1059 return -EMSGSIZE;
1060
1061 return 0;
1062}
1063
b22b941b
HFS		 1064static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1065 struct net_device *dev)
1066{
550bce59 1067 struct rtnl_link_stats64 *sp;
b22b941b 1068 struct nlattr *attr;
18402843 1069
58414d32
ND		 1070 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1071 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1072 if (!attr)
1073 return -EMSGSIZE;
1074
550bce59
RP		 1075 sp = nla_data(attr);
1076 dev_get_stats(dev, sp);
b22b941b 1077
550bce59
RP		 1078 attr = nla_reserve(skb, IFLA_STATS,
1079 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1080 if (!attr)
1081 return -EMSGSIZE;
1082
550bce59 1083 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1084
1085 return 0;
1086}
1087
1088static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1089 struct net_device *dev,
1090 int vfs_num,
1091 struct nlattr *vfinfo)
1092{
1093 struct ifla_vf_rss_query_en vf_rss_query_en;
79aab093 1094 struct nlattr *vf, *vfstats, *vfvlanlist;
b22b941b 1095 struct ifla_vf_link_state vf_linkstate;
79aab093 1096 struct ifla_vf_vlan_info vf_vlan_info;
b22b941b
HFS		 1097 struct ifla_vf_spoofchk vf_spoofchk;
1098 struct ifla_vf_tx_rate vf_tx_rate;
1099 struct ifla_vf_stats vf_stats;
1100 struct ifla_vf_trust vf_trust;
1101 struct ifla_vf_vlan vf_vlan;
1102 struct ifla_vf_rate vf_rate;
b22b941b
HFS		 1103 struct ifla_vf_mac vf_mac;
1104 struct ifla_vf_info ivi;
1105
0eed9cf5
MY		 1106 memset(&ivi, 0, sizeof(ivi));
1107
b22b941b
HFS		 1108 /* Not all SR-IOV capable drivers support the
1109 * spoofcheck and "RSS query enable" query. Preset to
1110 * -1 so the user space tool can detect that the driver
1111 * didn't report anything.
1112 */
1113 ivi.spoofchk = -1;
1114 ivi.rss_query_en = -1;
1115 ivi.trusted = -1;
b22b941b
HFS		 1116 /* The default value for VF link state is "auto"
1117 * IFLA_VF_LINK_STATE_AUTO which equals zero
1118 */
1119 ivi.linkstate = 0;
79aab093
MS		 1120 /* VLAN Protocol by default is 802.1Q */
1121 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1122 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1123 return 0;
1124
775f4f05
DC		 1125 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1126
b22b941b
HFS		 1127 vf_mac.vf =
1128 vf_vlan.vf =
79aab093 1129 vf_vlan_info.vf =
b22b941b
HFS		 1130 vf_rate.vf =
1131 vf_tx_rate.vf =
1132 vf_spoofchk.vf =
1133 vf_linkstate.vf =
1134 vf_rss_query_en.vf =
1135 vf_trust.vf = ivi.vf;
1136
1137 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1138 vf_vlan.vlan = ivi.vlan;
1139 vf_vlan.qos = ivi.qos;
79aab093
MS		 1140 vf_vlan_info.vlan = ivi.vlan;
1141 vf_vlan_info.qos = ivi.qos;
1142 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1143 vf_tx_rate.rate = ivi.max_tx_rate;
1144 vf_rate.min_tx_rate = ivi.min_tx_rate;
1145 vf_rate.max_tx_rate = ivi.max_tx_rate;
1146 vf_spoofchk.setting = ivi.spoofchk;
1147 vf_linkstate.link_state = ivi.linkstate;
1148 vf_rss_query_en.setting = ivi.rss_query_en;
1149 vf_trust.setting = ivi.trusted;
1150 vf = nla_nest_start(skb, IFLA_VF_INFO);
79aab093
MS		 1151 if (!vf)
1152 goto nla_put_vfinfo_failure;
b22b941b
HFS		 1153 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1154 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1155 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1156 &vf_rate) ||
1157 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1158 &vf_tx_rate) ||
1159 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1160 &vf_spoofchk) ||
1161 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1162 &vf_linkstate) ||
1163 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1164 sizeof(vf_rss_query_en),
1165 &vf_rss_query_en) ||
1166 nla_put(skb, IFLA_VF_TRUST,
1167 sizeof(vf_trust), &vf_trust))
79aab093
MS		 1168 goto nla_put_vf_failure;
1169 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1170 if (!vfvlanlist)
1171 goto nla_put_vf_failure;
1172 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1173 &vf_vlan_info)) {
1174 nla_nest_cancel(skb, vfvlanlist);
1175 goto nla_put_vf_failure;
1176 }
1177 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1178 memset(&vf_stats, 0, sizeof(vf_stats));
1179 if (dev->netdev_ops->ndo_get_vf_stats)
1180 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1181 &vf_stats);
1182 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
79aab093
MS		 1183 if (!vfstats)
1184 goto nla_put_vf_failure;
343a6d8e
ND		 1185 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1186 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1187 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1188 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1189 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1190 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1191 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1192 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1193 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1194 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1195 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
79aab093
MS		 1196 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1197 nla_nest_cancel(skb, vfstats);
1198 goto nla_put_vf_failure;
1199 }
b22b941b
HFS		 1200 nla_nest_end(skb, vfstats);
1201 nla_nest_end(skb, vf);
1202 return 0;
79aab093
MS		 1203
1204nla_put_vf_failure:
1205 nla_nest_cancel(skb, vf);
1206nla_put_vfinfo_failure:
1207 nla_nest_cancel(skb, vfinfo);
1208 return -EMSGSIZE;
b22b941b
HFS		 1209}
1210
250fc3df
FW		 1211static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1212 struct net_device *dev,
1213 u32 ext_filter_mask)
1214{
1215 struct nlattr *vfinfo;
1216 int i, num_vfs;
1217
1218 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1219 return 0;
1220
1221 num_vfs = dev_num_vf(dev->dev.parent);
1222 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1223 return -EMSGSIZE;
1224
1225 if (!dev->netdev_ops->ndo_get_vf_config)
1226 return 0;
1227
1228 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1229 if (!vfinfo)
1230 return -EMSGSIZE;
1231
1232 for (i = 0; i < num_vfs; i++) {
1233 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1234 return -EMSGSIZE;
1235 }
1236
1237 nla_nest_end(skb, vfinfo);
1238 return 0;
1239}
1240
b22b941b
HFS		 1241static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1242{
5f8e4474
KL		 1243 struct rtnl_link_ifmap map;
1244
1245 memset(&map, 0, sizeof(map));
1246 map.mem_start = dev->mem_start;
1247 map.mem_end = dev->mem_end;
1248 map.base_addr = dev->base_addr;
1249 map.irq = dev->irq;
1250 map.dma = dev->dma;
1251 map.port = dev->if_port;
1252
270cb4d0 1253 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1254 return -EMSGSIZE;
1255
1256 return 0;
1257}
1258
58038695 1259static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id)
d67b9cd2
DB		 1260{
1261 const struct net_device_ops *ops = dev->netdev_ops;
58038695 1262 const struct bpf_prog *generic_xdp_prog;
d67b9cd2
DB		 1263
1264 ASSERT_RTNL();
1265
58038695
MKL		 1266 *prog_id = 0;
1267 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1268 if (generic_xdp_prog) {
1269 *prog_id = generic_xdp_prog->aux->id;
d67b9cd2 1270 return XDP_ATTACHED_SKB;
58038695 1271 }
ce158e58
JK		 1272 if (!ops->ndo_xdp)
1273 return XDP_ATTACHED_NONE;
d67b9cd2 1274
ce158e58 1275 return __dev_xdp_attached(dev, ops->ndo_xdp, prog_id);
d67b9cd2
DB		 1276}
1277
d1fdd913
BB		 1278static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1279{
d1fdd913 1280 struct nlattr *xdp;
58038695 1281 u32 prog_id;
d1fdd913
BB		 1282 int err;
1283
d1fdd913
BB		 1284 xdp = nla_nest_start(skb, IFLA_XDP);
1285 if (!xdp)
1286 return -EMSGSIZE;
d67b9cd2
DB		 1287
1288 err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
58038695 1289 rtnl_xdp_attached_mode(dev, &prog_id));
d1fdd913
BB		 1290 if (err)
1291 goto err_cancel;
1292
58038695
MKL		 1293 if (prog_id) {
1294 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1295 if (err)
1296 goto err_cancel;
1297 }
1298
d1fdd913
BB		 1299 nla_nest_end(skb, xdp);
1300 return 0;
1301
1302err_cancel:
1303 nla_nest_cancel(skb, xdp);
1304 return err;
1305}
1306
3d3ea5af
VY		 1307static u32 rtnl_get_event(unsigned long event)
1308{
1309 u32 rtnl_event_type = IFLA_EVENT_NONE;
1310
1311 switch (event) {
1312 case NETDEV_REBOOT:
1313 rtnl_event_type = IFLA_EVENT_REBOOT;
1314 break;
1315 case NETDEV_FEAT_CHANGE:
1316 rtnl_event_type = IFLA_EVENT_FEATURES;
1317 break;
1318 case NETDEV_BONDING_FAILOVER:
1319 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1320 break;
1321 case NETDEV_NOTIFY_PEERS:
1322 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1323 break;
1324 case NETDEV_RESEND_IGMP:
1325 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1326 break;
1327 case NETDEV_CHANGEINFODATA:
1328 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1329 break;
1330 default:
1331 break;
1332 }
1333
1334 return rtnl_event_type;
1335}
1336
79110a04
FW		 1337static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1338{
1339 const struct net_device *upper_dev;
1340 int ret = 0;
1341
1342 rcu_read_lock();
1343
1344 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1345 if (upper_dev)
1346 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1347
1348 rcu_read_unlock();
1349 return ret;
1350}
1351
1352static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev)
1353{
1354 int ifindex = dev_get_iflink(dev);
1355
1356 if (dev->ifindex == ifindex)
1357 return 0;
1358
1359 return nla_put_u32(skb, IFLA_LINK, ifindex);
1360}
1361
6c557001
FW		 1362static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1363 struct net_device *dev)
1364{
1365 char buf[IFALIASZ];
1366 int ret;
1367
1368 ret = dev_get_alias(dev, buf, sizeof(buf));
1369 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1370}
1371
b1e66b9a
FW		 1372static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1373 const struct net_device *dev)
1374{
1375 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1376 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1377
1378 if (!net_eq(dev_net(dev), link_net)) {
1379 int id = peernet2id_alloc(dev_net(dev), link_net);
1380
1381 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1382 return -EMSGSIZE;
1383 }
1384 }
1385
1386 return 0;
1387}
1388
070cbf5b
FW		 1389static int rtnl_fill_link_af(struct sk_buff *skb,
1390 const struct net_device *dev,
1391 u32 ext_filter_mask)
1392{
1393 const struct rtnl_af_ops *af_ops;
1394 struct nlattr *af_spec;
1395
1396 af_spec = nla_nest_start(skb, IFLA_AF_SPEC);
1397 if (!af_spec)
1398 return -EMSGSIZE;
1399
5fa85a09 1400 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
070cbf5b
FW		 1401 struct nlattr *af;
1402 int err;
1403
1404 if (!af_ops->fill_link_af)
1405 continue;
1406
1407 af = nla_nest_start(skb, af_ops->family);
1408 if (!af)
1409 return -EMSGSIZE;
1410
1411 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1412 /*
1413 * Caller may return ENODATA to indicate that there
1414 * was no data to be dumped. This is not an error, it
1415 * means we should trim the attribute header and
1416 * continue.
1417 */
1418 if (err == -ENODATA)
1419 nla_nest_cancel(skb, af);
1420 else if (err < 0)
1421 return -EMSGSIZE;
1422
1423 nla_nest_end(skb, af);
1424 }
1425
1426 nla_nest_end(skb, af_spec);
1427 return 0;
1428}
1429
b60c5115 1430static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1431 int type, u32 pid, u32 seq, u32 change,
3d3ea5af 1432 unsigned int flags, u32 ext_filter_mask,
6621dd29 1433 u32 event, int *new_nsid)
b60c5115
TG		 1434{
1435 struct ifinfomsg *ifm;
1436 struct nlmsghdr *nlh;
1da177e4 1437
2907c35f 1438 ASSERT_RTNL();
b60c5115
TG		 1439 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1440 if (nlh == NULL)
26932566 1441 return -EMSGSIZE;
1da177e4 1442
b60c5115
TG		 1443 ifm = nlmsg_data(nlh);
1444 ifm->ifi_family = AF_UNSPEC;
1445 ifm->__ifi_pad = 0;
1446 ifm->ifi_type = dev->type;
1447 ifm->ifi_index = dev->ifindex;
1448 ifm->ifi_flags = dev_get_flags(dev);
1449 ifm->ifi_change = change;
1450
a6574349
DM		 1451 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1452 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1453 nla_put_u8(skb, IFLA_OPERSTATE,
1454 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1455 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1456 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1457 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1458 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1459 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1460 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1461 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1462#ifdef CONFIG_RPS
76ff5cc9 1463 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1464#endif
79110a04
FW		 1465 nla_put_iflink(skb, dev) ||
1466 put_master_ifindex(skb, dev) ||
9a57247f 1467 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1468 (dev->qdisc &&
1469 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
6c557001 1470 nla_put_ifalias(skb, dev) ||
2d3b479d 1471 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1472 atomic_read(&dev->carrier_changes)) ||
1473 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1474 goto nla_put_failure;
0b815a1a 1475
3d3ea5af
VY		 1476 if (event != IFLA_EVENT_NONE) {
1477 if (nla_put_u32(skb, IFLA_EVENT, event))
1478 goto nla_put_failure;
1479 }
1480
b22b941b
HFS		 1481 if (rtnl_fill_link_ifmap(skb, dev))
1482 goto nla_put_failure;
1da177e4
LT		 1483
1484 if (dev->addr_len) {
a6574349
DM		 1485 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1486 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1487 goto nla_put_failure;
1da177e4
LT		 1488 }
1489
66cae9ed
JP		 1490 if (rtnl_phys_port_id_fill(skb, dev))
1491 goto nla_put_failure;
1492
db24a904
DA		 1493 if (rtnl_phys_port_name_fill(skb, dev))
1494 goto nla_put_failure;
1495
82f28412
JP		 1496 if (rtnl_phys_switch_id_fill(skb, dev))
1497 goto nla_put_failure;
1498
b22b941b 1499 if (rtnl_fill_stats(skb, dev))
10708f37 1500 goto nla_put_failure;
10708f37 1501
250fc3df 1502 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
a6574349 1503 goto nla_put_failure;
57b61080 1504
c53864fd 1505 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1506 goto nla_put_failure;
1507
d1fdd913
BB		 1508 if (rtnl_xdp_fill(skb, dev))
1509 goto nla_put_failure;
1510
ba7d49b1 1511 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1512 if (rtnl_link_fill(skb, dev) < 0)
1513 goto nla_put_failure;
1514 }
1515
b1e66b9a
FW		 1516 if (rtnl_fill_link_netnsid(skb, dev))
1517 goto nla_put_failure;
d37512a2 1518
6621dd29
ND		 1519 if (new_nsid &&
1520 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1521 goto nla_put_failure;
1522
5fa85a09 1523 rcu_read_lock();
070cbf5b 1524 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
5fa85a09
FW		 1525 goto nla_put_failure_rcu;
1526 rcu_read_unlock();
f8ff182c 1527
053c095a
JB		 1528 nlmsg_end(skb, nlh);
1529 return 0;
b60c5115 1530
5fa85a09
FW		 1531nla_put_failure_rcu:
1532 rcu_read_unlock();
b60c5115 1533nla_put_failure:
26932566
PM		 1534 nlmsg_cancel(skb, nlh);
1535 return -EMSGSIZE;
1da177e4
LT		 1536}
1537
f7b12606 1538static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1539 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1540 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1541 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1542 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1543 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1544 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1545 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1546 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1547 [IFLA_TXQLEN] = { .type = NLA_U32 },
1548 [IFLA_WEIGHT] = { .type = NLA_U32 },
1549 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1550 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1551 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1552 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1553 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1554 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1555 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1556 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1557 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1558 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1559 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1560 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1561 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1562 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1563 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1564 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1565 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1566 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1567 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1568 [IFLA_XDP] = { .type = NLA_NESTED },
3d3ea5af 1569 [IFLA_EVENT] = { .type = NLA_U32 },
db833d40 1570 [IFLA_GROUP] = { .type = NLA_U32 },
da5e0494
TG		 1571};
1572
38f7b870
PM		 1573static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1574 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1575 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1576 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1577 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1578};
1579
c02db8c6 1580static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1581 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1582 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1583 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1584 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1585 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1586 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1587 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1588 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1589 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1590 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1591 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1592 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1593};
1594
57b61080
SF		 1595static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1596 [IFLA_PORT_VF] = { .type = NLA_U32 },
1597 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1598 .len = PORT_PROFILE_MAX },
57b61080
SF		 1599 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1600 .len = PORT_UUID_MAX },
1601 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1602 .len = PORT_UUID_MAX },
1603 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1604 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 1605
1606 /* Unused, but we need to keep it here since user space could
1607 * fill it. It's also broken with regard to NLA_BINARY use in
1608 * combination with structs.
1609 */
1610 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1611 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 1612};
1613
d1fdd913
BB		 1614static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1615 [IFLA_XDP_FD] = { .type = NLA_S32 },
1616 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 1617 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
58038695 1618 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
d1fdd913
BB		 1619};
1620
dc599f76
DA		 1621static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1622{
1623 const struct rtnl_link_ops *ops = NULL;
1624 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1625
fceb6435
JB		 1626 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1627 ifla_info_policy, NULL) < 0)
dc599f76
DA		 1628 return NULL;
1629
1630 if (linfo[IFLA_INFO_KIND]) {
1631 char kind[MODULE_NAME_LEN];
1632
1633 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1634 ops = rtnl_link_ops_get(kind);
1635 }
1636
1637 return ops;
1638}
1639
1640static bool link_master_filtered(struct net_device *dev, int master_idx)
1641{
1642 struct net_device *master;
1643
1644 if (!master_idx)
1645 return false;
1646
1647 master = netdev_master_upper_dev_get(dev);
1648 if (!master || master->ifindex != master_idx)
1649 return true;
1650
1651 return false;
1652}
1653
1654static bool link_kind_filtered(const struct net_device *dev,
1655 const struct rtnl_link_ops *kind_ops)
1656{
1657 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1658 return true;
1659
1660 return false;
1661}
1662
1663static bool link_dump_filtered(struct net_device *dev,
1664 int master_idx,
1665 const struct rtnl_link_ops *kind_ops)
1666{
1667 if (link_master_filtered(dev, master_idx) ||
1668 link_kind_filtered(dev, kind_ops))
1669 return true;
1670
1671 return false;
1672}
1673
f7b12606
JP		 1674static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1675{
1676 struct net *net = sock_net(skb->sk);
1677 int h, s_h;
1678 int idx = 0, s_idx;
1679 struct net_device *dev;
1680 struct hlist_head *head;
1681 struct nlattr *tb[IFLA_MAX+1];
1682 u32 ext_filter_mask = 0;
dc599f76
DA		 1683 const struct rtnl_link_ops *kind_ops = NULL;
1684 unsigned int flags = NLM_F_MULTI;
1685 int master_idx = 0;
973462bb 1686 int err;
e5eca6d4 1687 int hdrlen;
f7b12606
JP		 1688
1689 s_h = cb->args[0];
1690 s_idx = cb->args[1];
1691
e5eca6d4
MS		 1692 /* A hack to preserve kernel<->userspace interface.
1693 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1694 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1695 * what iproute2 < v3.9.0 used.
1696 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1697 * attribute, its netlink message is shorter than struct ifinfomsg.
1698 */
1699 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1700 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1701
fceb6435
JB		 1702 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1703 ifla_policy, NULL) >= 0) {
f7b12606
JP		 1704 if (tb[IFLA_EXT_MASK])
1705 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1706
1707 if (tb[IFLA_MASTER])
1708 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1709
1710 if (tb[IFLA_LINKINFO])
1711 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1712
1713 if (master_idx || kind_ops)
1714 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1715 }
1716
1717 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1718 idx = 0;
1719 head = &net->dev_index_head[h];
cac5e65e 1720 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 1721 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 1722 goto cont;
f7b12606
JP		 1723 if (idx < s_idx)
1724 goto cont;
973462bb
DG		 1725 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1726 NETLINK_CB(cb->skb).portid,
1727 cb->nlh->nlmsg_seq, 0,
dc599f76 1728 flags,
6621dd29 1729 ext_filter_mask, 0, NULL);
973462bb 1730
f6c5775f
DA		 1731 if (err < 0) {
1732 if (likely(skb->len))
1733 goto out;
1734
1735 goto out_err;
1736 }
f7b12606
JP		 1737cont:
1738 idx++;
1739 }
1740 }
1741out:
f6c5775f
DA		 1742 err = skb->len;
1743out_err:
f7b12606
JP		 1744 cb->args[1] = idx;
1745 cb->args[0] = h;
d0225784
JS		 1746 cb->seq = net->dev_base_seq;
1747 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
f7b12606 1748
f6c5775f 1749 return err;
f7b12606
JP		 1750}
1751
fceb6435
JB		 1752int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1753 struct netlink_ext_ack *exterr)
f7b12606 1754{
fceb6435 1755 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
f7b12606
JP		 1756}
1757EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1758
81adee47
EB		 1759struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1760{
1761 struct net *net;
1762 /* Examine the link attributes and figure out which
1763 * network namespace we are talking about.
1764 */
1765 if (tb[IFLA_NET_NS_PID])
1766 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1767 else if (tb[IFLA_NET_NS_FD])
1768 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1769 else
1770 net = get_net(src_net);
1771 return net;
1772}
1773EXPORT_SYMBOL(rtnl_link_get_net);
1774
1840bb13
TG		 1775static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1776{
1777 if (dev) {
1778 if (tb[IFLA_ADDRESS] &&
1779 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1780 return -EINVAL;
1781
1782 if (tb[IFLA_BROADCAST] &&
1783 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1784 return -EINVAL;
1785 }
1786
cf7afbfe
TG		 1787 if (tb[IFLA_AF_SPEC]) {
1788 struct nlattr *af;
1789 int rem, err;
1790
1791 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1792 const struct rtnl_af_ops *af_ops;
1793
5fa85a09
FW		 1794 rcu_read_lock();
1795 af_ops = rtnl_af_lookup(nla_type(af));
1796 if (!af_ops) {
1797 rcu_read_unlock();
cf7afbfe 1798 return -EAFNOSUPPORT;
5fa85a09 1799 }
cf7afbfe 1800
5fa85a09
FW		 1801 if (!af_ops->set_link_af) {
1802 rcu_read_unlock();
cf7afbfe 1803 return -EOPNOTSUPP;
5fa85a09 1804 }
cf7afbfe
TG		 1805
1806 if (af_ops->validate_link_af) {
6d3a9a68 1807 err = af_ops->validate_link_af(dev, af);
5fa85a09
FW		 1808 if (err < 0) {
1809 rcu_read_unlock();
cf7afbfe 1810 return err;
5fa85a09 1811 }
cf7afbfe 1812 }
5fa85a09
FW		 1813
1814 rcu_read_unlock();
cf7afbfe
TG		 1815 }
1816 }
1817
1840bb13
TG		 1818 return 0;
1819}
1820
cc8e27cc
EC		 1821static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1822 int guid_type)
1823{
1824 const struct net_device_ops *ops = dev->netdev_ops;
1825
1826 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1827}
1828
1829static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1830{
1831 if (dev->type != ARPHRD_INFINIBAND)
1832 return -EOPNOTSUPP;
1833
1834 return handle_infiniband_guid(dev, ivt, guid_type);
1835}
1836
4f7d2cdf 1837static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1838{
c02db8c6 1839 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1840 int err = -EINVAL;
c02db8c6 1841
4f7d2cdf
DB		 1842 if (tb[IFLA_VF_MAC]) {
1843 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1844
4f7d2cdf
DB		 1845 err = -EOPNOTSUPP;
1846 if (ops->ndo_set_vf_mac)
1847 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1848 ivm->mac);
1849 if (err < 0)
1850 return err;
1851 }
1852
1853 if (tb[IFLA_VF_VLAN]) {
1854 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1855
1856 err = -EOPNOTSUPP;
1857 if (ops->ndo_set_vf_vlan)
1858 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 1859 ivv->qos,
1860 htons(ETH_P_8021Q));
1861 if (err < 0)
1862 return err;
1863 }
1864
1865 if (tb[IFLA_VF_VLAN_LIST]) {
1866 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1867 struct nlattr *attr;
1868 int rem, len = 0;
1869
1870 err = -EOPNOTSUPP;
1871 if (!ops->ndo_set_vf_vlan)
1872 return err;
1873
1874 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1875 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1876 nla_len(attr) < NLA_HDRLEN) {
1877 return -EINVAL;
1878 }
1879 if (len >= MAX_VLAN_LIST_LEN)
1880 return -EOPNOTSUPP;
1881 ivvl[len] = nla_data(attr);
1882
1883 len++;
1884 }
fa34cd94
AB		 1885 if (len == 0)
1886 return -EINVAL;
1887
79aab093
MS		 1888 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1889 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 1890 if (err < 0)
1891 return err;
c02db8c6 1892 }
4f7d2cdf
DB		 1893
1894 if (tb[IFLA_VF_TX_RATE]) {
1895 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1896 struct ifla_vf_info ivf;
1897
1898 err = -EOPNOTSUPP;
1899 if (ops->ndo_get_vf_config)
1900 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1901 if (err < 0)
1902 return err;
1903
1904 err = -EOPNOTSUPP;
1905 if (ops->ndo_set_vf_rate)
1906 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1907 ivf.min_tx_rate,
1908 ivt->rate);
1909 if (err < 0)
1910 return err;
1911 }
1912
1913 if (tb[IFLA_VF_RATE]) {
1914 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1915
1916 err = -EOPNOTSUPP;
1917 if (ops->ndo_set_vf_rate)
1918 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1919 ivt->min_tx_rate,
1920 ivt->max_tx_rate);
1921 if (err < 0)
1922 return err;
1923 }
1924
1925 if (tb[IFLA_VF_SPOOFCHK]) {
1926 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1927
1928 err = -EOPNOTSUPP;
1929 if (ops->ndo_set_vf_spoofchk)
1930 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1931 ivs->setting);
1932 if (err < 0)
1933 return err;
1934 }
1935
1936 if (tb[IFLA_VF_LINK_STATE]) {
1937 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1938
1939 err = -EOPNOTSUPP;
1940 if (ops->ndo_set_vf_link_state)
1941 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1942 ivl->link_state);
1943 if (err < 0)
1944 return err;
1945 }
1946
1947 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1948 struct ifla_vf_rss_query_en *ivrssq_en;
1949
1950 err = -EOPNOTSUPP;
1951 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1952 if (ops->ndo_set_vf_rss_query_en)
1953 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1954 ivrssq_en->setting);
1955 if (err < 0)
1956 return err;
1957 }
1958
dd461d6a
HS		 1959 if (tb[IFLA_VF_TRUST]) {
1960 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1961
1962 err = -EOPNOTSUPP;
1963 if (ops->ndo_set_vf_trust)
1964 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1965 if (err < 0)
1966 return err;
1967 }
1968
cc8e27cc
EC		 1969 if (tb[IFLA_VF_IB_NODE_GUID]) {
1970 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1971
1972 if (!ops->ndo_set_vf_guid)
1973 return -EOPNOTSUPP;
1974
1975 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1976 }
1977
1978 if (tb[IFLA_VF_IB_PORT_GUID]) {
1979 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1980
1981 if (!ops->ndo_set_vf_guid)
1982 return -EOPNOTSUPP;
1983
1984 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1985 }
1986
c02db8c6
CW		 1987 return err;
1988}
1989
33eaf2a6
DA		 1990static int do_set_master(struct net_device *dev, int ifindex,
1991 struct netlink_ext_ack *extack)
fbaec0ea 1992{
898e5061 1993 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1994 const struct net_device_ops *ops;
1995 int err;
1996
898e5061
JP		 1997 if (upper_dev) {
1998 if (upper_dev->ifindex == ifindex)
fbaec0ea 1999 return 0;
898e5061 2000 ops = upper_dev->netdev_ops;
fbaec0ea 2001 if (ops->ndo_del_slave) {
898e5061 2002 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 2003 if (err)
2004 return err;
2005 } else {
2006 return -EOPNOTSUPP;
2007 }
2008 }
2009
2010 if (ifindex) {
898e5061
JP		 2011 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2012 if (!upper_dev)
fbaec0ea 2013 return -EINVAL;
898e5061 2014 ops = upper_dev->netdev_ops;
fbaec0ea 2015 if (ops->ndo_add_slave) {
33eaf2a6 2016 err = ops->ndo_add_slave(upper_dev, dev, extack);
fbaec0ea
JP		 2017 if (err)
2018 return err;
2019 } else {
2020 return -EOPNOTSUPP;
2021 }
2022 }
2023 return 0;
2024}
2025
90c325e3 2026#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 2027/* notify flag means notify + modified. */
2028#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 2029static int do_setlink(const struct sk_buff *skb,
2030 struct net_device *dev, struct ifinfomsg *ifm,
ddf9f970 2031 struct netlink_ext_ack *extack,
90c325e3 2032 struct nlattr **tb, char *ifname, int status)
1da177e4 2033{
d314774c 2034 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 2035 int err;
1da177e4 2036
f0630529 2037 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 2038 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 2039 if (IS_ERR(net)) {
2040 err = PTR_ERR(net);
2041 goto errout;
2042 }
90f62cf3 2043 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 2044 put_net(net);
b51642f6
EB		 2045 err = -EPERM;
2046 goto errout;
2047 }
d8a5ec67
EB		 2048 err = dev_change_net_namespace(dev, net, ifname);
2049 put_net(net);
2050 if (err)
2051 goto errout;
90c325e3 2052 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 2053 }
2054
da5e0494 2055 if (tb[IFLA_MAP]) {
1da177e4
LT		 2056 struct rtnl_link_ifmap *u_map;
2057 struct ifmap k_map;
2058
d314774c 2059 if (!ops->ndo_set_config) {
1da177e4 2060 err = -EOPNOTSUPP;
0157f60c 2061 goto errout;
1da177e4
LT		 2062 }
2063
2064 if (!netif_device_present(dev)) {
2065 err = -ENODEV;
0157f60c 2066 goto errout;
1da177e4 2067 }
1da177e4 2068
da5e0494 2069 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 2070 k_map.mem_start = (unsigned long) u_map->mem_start;
2071 k_map.mem_end = (unsigned long) u_map->mem_end;
2072 k_map.base_addr = (unsigned short) u_map->base_addr;
2073 k_map.irq = (unsigned char) u_map->irq;
2074 k_map.dma = (unsigned char) u_map->dma;
2075 k_map.port = (unsigned char) u_map->port;
2076
d314774c 2077 err = ops->ndo_set_config(dev, &k_map);
da5e0494 2078 if (err < 0)
0157f60c 2079 goto errout;
1da177e4 2080
ba998906 2081 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 2082 }
2083
da5e0494 2084 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 2085 struct sockaddr *sa;
2086 int len;
2087
153711f9
WC		 2088 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2089 sizeof(*sa));
70f8e78e
DM		 2090 sa = kmalloc(len, GFP_KERNEL);
2091 if (!sa) {
2092 err = -ENOMEM;
0157f60c 2093 goto errout;
70f8e78e
DM		 2094 }
2095 sa->sa_family = dev->type;
da5e0494 2096 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 2097 dev->addr_len);
e7c3273e 2098 err = dev_set_mac_address(dev, sa);
70f8e78e 2099 kfree(sa);
1da177e4 2100 if (err)
0157f60c 2101 goto errout;
90c325e3 2102 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2103 }
2104
da5e0494
TG		 2105 if (tb[IFLA_MTU]) {
2106 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
2107 if (err < 0)
0157f60c 2108 goto errout;
90c325e3 2109 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2110 }
2111
cbda10fa
VD		 2112 if (tb[IFLA_GROUP]) {
2113 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 2114 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 2115 }
2116
da5e0494
TG		 2117 /*
2118 * Interface selected by interface index but interface
2119 * name provided implies that a name change has been
2120 * requested.
2121 */
51055be8 2122 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2123 err = dev_change_name(dev, ifname);
2124 if (err < 0)
0157f60c 2125 goto errout;
90c325e3 2126 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2127 }
2128
0b815a1a
SH		 2129 if (tb[IFLA_IFALIAS]) {
2130 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2131 nla_len(tb[IFLA_IFALIAS]));
2132 if (err < 0)
2133 goto errout;
ba998906 2134 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2135 }
2136
da5e0494
TG		 2137 if (tb[IFLA_BROADCAST]) {
2138 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2139 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2140 }
2141
83b496e9 2142 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 2143 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 2144 if (err < 0)
2145 goto errout;
83b496e9 2146 }
1da177e4 2147
fbaec0ea 2148 if (tb[IFLA_MASTER]) {
33eaf2a6 2149 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
fbaec0ea
JP		 2150 if (err)
2151 goto errout;
90c325e3 2152 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2153 }
2154
9a57247f
JP		 2155 if (tb[IFLA_CARRIER]) {
2156 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2157 if (err)
2158 goto errout;
90c325e3 2159 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2160 }
2161
5d1180fc 2162 if (tb[IFLA_TXQLEN]) {
0cd29503
AD		 2163 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2164 unsigned int orig_len = dev->tx_queue_len;
08294a26
JW		 2165
2166 if (dev->tx_queue_len ^ value) {
2167 dev->tx_queue_len = value;
2168 err = call_netdevice_notifiers(
2169 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2170 err = notifier_to_errno(err);
2171 if (err) {
2172 dev->tx_queue_len = orig_len;
2173 goto errout;
2174 }
ba998906 2175 status |= DO_SETLINK_NOTIFY;
08294a26 2176 }
5d1180fc 2177 }
b00055aa 2178
da5e0494 2179 if (tb[IFLA_OPERSTATE])
93b2d4a2 2180 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2181
da5e0494 2182 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2183 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2184
93b2d4a2 2185 write_lock_bh(&dev_base_lock);
1889b0e7 2186 if (dev->link_mode ^ value)
ba998906 2187 status |= DO_SETLINK_NOTIFY;
1889b0e7 2188 dev->link_mode = value;
93b2d4a2 2189 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 2190 }
2191
c02db8c6 2192 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2193 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2194 struct nlattr *attr;
2195 int rem;
4f7d2cdf 2196
c02db8c6 2197 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2198 if (nla_type(attr) != IFLA_VF_INFO ||
2199 nla_len(attr) < NLA_HDRLEN) {
253683bb 2200 err = -EINVAL;
c02db8c6 2201 goto errout;
253683bb 2202 }
4f7d2cdf 2203 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
fceb6435 2204 ifla_vf_policy, NULL);
4f7d2cdf
DB		 2205 if (err < 0)
2206 goto errout;
2207 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2208 if (err < 0)
2209 goto errout;
ba998906 2210 status |= DO_SETLINK_NOTIFY;
c02db8c6 2211 }
ebc08a6f 2212 }
1da177e4
LT		 2213 err = 0;
2214
57b61080
SF		 2215 if (tb[IFLA_VF_PORTS]) {
2216 struct nlattr *port[IFLA_PORT_MAX+1];
2217 struct nlattr *attr;
2218 int vf;
2219 int rem;
2220
2221 err = -EOPNOTSUPP;
2222 if (!ops->ndo_set_vf_port)
2223 goto errout;
2224
2225 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2226 if (nla_type(attr) != IFLA_VF_PORT ||
2227 nla_len(attr) < NLA_HDRLEN) {
2228 err = -EINVAL;
2229 goto errout;
2230 }
2231 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
fceb6435 2232 ifla_port_policy, NULL);
57b61080
SF		 2233 if (err < 0)
2234 goto errout;
2235 if (!port[IFLA_PORT_VF]) {
2236 err = -EOPNOTSUPP;
2237 goto errout;
2238 }
2239 vf = nla_get_u32(port[IFLA_PORT_VF]);
2240 err = ops->ndo_set_vf_port(dev, vf, port);
2241 if (err < 0)
2242 goto errout;
ba998906 2243 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2244 }
2245 }
2246 err = 0;
2247
2248 if (tb[IFLA_PORT_SELF]) {
2249 struct nlattr *port[IFLA_PORT_MAX+1];
2250
2251 err = nla_parse_nested(port, IFLA_PORT_MAX,
fceb6435
JB		 2252 tb[IFLA_PORT_SELF], ifla_port_policy,
2253 NULL);
57b61080
SF		 2254 if (err < 0)
2255 goto errout;
2256
2257 err = -EOPNOTSUPP;
2258 if (ops->ndo_set_vf_port)
2259 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2260 if (err < 0)
2261 goto errout;
ba998906 2262 status |= DO_SETLINK_NOTIFY;
57b61080 2263 }
f8ff182c
TG		 2264
2265 if (tb[IFLA_AF_SPEC]) {
2266 struct nlattr *af;
2267 int rem;
2268
2269 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2270 const struct rtnl_af_ops *af_ops;
2271
5fa85a09
FW		 2272 rcu_read_lock();
2273
f8ff182c 2274 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2275 BUG();
f8ff182c 2276
cf7afbfe 2277 err = af_ops->set_link_af(dev, af);
5fa85a09
FW		 2278 if (err < 0) {
2279 rcu_read_unlock();
f8ff182c 2280 goto errout;
5fa85a09 2281 }
f8ff182c 2282
5fa85a09 2283 rcu_read_unlock();
ba998906 2284 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2285 }
2286 }
57b61080
SF		 2287 err = 0;
2288
88d6378b
AK		 2289 if (tb[IFLA_PROTO_DOWN]) {
2290 err = dev_change_proto_down(dev,
2291 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2292 if (err)
2293 goto errout;
2294 status |= DO_SETLINK_NOTIFY;
2295 }
2296
d1fdd913
BB		 2297 if (tb[IFLA_XDP]) {
2298 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 2299 u32 xdp_flags = 0;
d1fdd913
BB		 2300
2301 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
fceb6435 2302 ifla_xdp_policy, NULL);
d1fdd913
BB		 2303 if (err < 0)
2304 goto errout;
2305
58038695 2306 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
262d8625
BB		 2307 err = -EINVAL;
2308 goto errout;
2309 }
85de8576
DB		 2310
2311 if (xdp[IFLA_XDP_FLAGS]) {
2312 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2313 if (xdp_flags & ~XDP_FLAGS_MASK) {
2314 err = -EINVAL;
2315 goto errout;
2316 }
ee5d032f 2317 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
0489df9a
DB		 2318 err = -EINVAL;
2319 goto errout;
2320 }
85de8576
DB		 2321 }
2322
d1fdd913 2323 if (xdp[IFLA_XDP_FD]) {
ddf9f970 2324 err = dev_change_xdp_fd(dev, extack,
85de8576
DB		 2325 nla_get_s32(xdp[IFLA_XDP_FD]),
2326 xdp_flags);
d1fdd913
BB		 2327 if (err)
2328 goto errout;
2329 status |= DO_SETLINK_NOTIFY;
2330 }
2331 }
2332
0157f60c 2333errout:
ba998906
ND		 2334 if (status & DO_SETLINK_MODIFIED) {
2335 if (status & DO_SETLINK_NOTIFY)
2336 netdev_state_change(dev);
2337
2338 if (err < 0)
2339 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",
2340 dev->name);
2341 }
da5e0494 2342
0157f60c
PM		 2343 return err;
2344}
1da177e4 2345
c21ef3e3
DA		 2346static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2347 struct netlink_ext_ack *extack)
0157f60c 2348{
3b1e0a65 2349 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2350 struct ifinfomsg *ifm;
2351 struct net_device *dev;
2352 int err;
2353 struct nlattr *tb[IFLA_MAX+1];
2354 char ifname[IFNAMSIZ];
2355
c21ef3e3
DA		 2356 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2357 extack);
0157f60c
PM		 2358 if (err < 0)
2359 goto errout;
2360
2361 if (tb[IFLA_IFNAME])
2362 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2363 else
2364 ifname[0] = '\0';
2365
2366 err = -EINVAL;
2367 ifm = nlmsg_data(nlh);
2368 if (ifm->ifi_index > 0)
a3d12891 2369 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2370 else if (tb[IFLA_IFNAME])
a3d12891 2371 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2372 else
2373 goto errout;
2374
2375 if (dev == NULL) {
2376 err = -ENODEV;
2377 goto errout;
2378 }
2379
e0d087af
ED		 2380 err = validate_linkmsg(dev, tb);
2381 if (err < 0)
a3d12891 2382 goto errout;
0157f60c 2383
ddf9f970 2384 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
da5e0494 2385errout:
1da177e4
LT		 2386 return err;
2387}
2388
66400d54
WC		 2389static int rtnl_group_dellink(const struct net *net, int group)
2390{
2391 struct net_device *dev, *aux;
2392 LIST_HEAD(list_kill);
2393 bool found = false;
2394
2395 if (!group)
2396 return -EPERM;
2397
2398 for_each_netdev(net, dev) {
2399 if (dev->group == group) {
2400 const struct rtnl_link_ops *ops;
2401
2402 found = true;
2403 ops = dev->rtnl_link_ops;
2404 if (!ops || !ops->dellink)
2405 return -EOPNOTSUPP;
2406 }
2407 }
2408
2409 if (!found)
2410 return -ENODEV;
2411
2412 for_each_netdev_safe(net, dev, aux) {
2413 if (dev->group == group) {
2414 const struct rtnl_link_ops *ops;
2415
2416 ops = dev->rtnl_link_ops;
2417 ops->dellink(dev, &list_kill);
2418 }
2419 }
2420 unregister_netdevice_many(&list_kill);
2421
2422 return 0;
2423}
2424
614732ea
TG		 2425int rtnl_delete_link(struct net_device *dev)
2426{
2427 const struct rtnl_link_ops *ops;
2428 LIST_HEAD(list_kill);
2429
2430 ops = dev->rtnl_link_ops;
2431 if (!ops || !ops->dellink)
2432 return -EOPNOTSUPP;
2433
2434 ops->dellink(dev, &list_kill);
2435 unregister_netdevice_many(&list_kill);
2436
2437 return 0;
2438}
2439EXPORT_SYMBOL_GPL(rtnl_delete_link);
2440
c21ef3e3
DA		 2441static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2442 struct netlink_ext_ack *extack)
38f7b870 2443{
3b1e0a65 2444 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2445 struct net_device *dev;
2446 struct ifinfomsg *ifm;
2447 char ifname[IFNAMSIZ];
2448 struct nlattr *tb[IFLA_MAX+1];
2449 int err;
2450
c21ef3e3 2451 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2452 if (err < 0)
2453 return err;
2454
2455 if (tb[IFLA_IFNAME])
2456 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2457
2458 ifm = nlmsg_data(nlh);
2459 if (ifm->ifi_index > 0)
881d966b 2460 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2461 else if (tb[IFLA_IFNAME])
881d966b 2462 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2463 else if (tb[IFLA_GROUP])
2464 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2465 else
2466 return -EINVAL;
2467
2468 if (!dev)
2469 return -ENODEV;
2470
614732ea 2471 return rtnl_delete_link(dev);
38f7b870
PM		 2472}
2473
3729d502
PM		 2474int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2475{
2476 unsigned int old_flags;
2477 int err;
2478
2479 old_flags = dev->flags;
2480 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2481 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2482 if (err < 0)
2483 return err;
2484 }
2485
2486 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2487
a528c219 2488 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2489 return 0;
2490}
2491EXPORT_SYMBOL(rtnl_configure_link);
2492
c0713563 2493struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2494 const char *ifname, unsigned char name_assign_type,
5517750f 2495 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288 2496{
e7199288 2497 struct net_device *dev;
d40156aa
JP		 2498 unsigned int num_tx_queues = 1;
2499 unsigned int num_rx_queues = 1;
e7199288 2500
76ff5cc9
JP		 2501 if (tb[IFLA_NUM_TX_QUEUES])
2502 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2503 else if (ops->get_num_tx_queues)
d40156aa 2504 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2505
2506 if (tb[IFLA_NUM_RX_QUEUES])
2507 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2508 else if (ops->get_num_rx_queues)
d40156aa 2509 num_rx_queues = ops->get_num_rx_queues();
efacb309 2510
5517750f 2511 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2512 ops->setup, num_tx_queues, num_rx_queues);
e7199288 2513 if (!dev)
d1892e4e 2514 return ERR_PTR(-ENOMEM);
e7199288 2515
81adee47
EB		 2516 dev_net_set(dev, net);
2517 dev->rtnl_link_ops = ops;
3729d502 2518 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2519
e7199288
PE		 2520 if (tb[IFLA_MTU])
2521 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2522 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2523 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2524 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2525 dev->addr_assign_type = NET_ADDR_SET;
2526 }
e7199288
PE		 2527 if (tb[IFLA_BROADCAST])
2528 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2529 nla_len(tb[IFLA_BROADCAST]));
2530 if (tb[IFLA_TXQLEN])
2531 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2532 if (tb[IFLA_OPERSTATE])
93b2d4a2 2533 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2534 if (tb[IFLA_LINKMODE])
2535 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2536 if (tb[IFLA_GROUP])
2537 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2538
2539 return dev;
e7199288 2540}
e0d087af 2541EXPORT_SYMBOL(rtnl_create_link);
e7199288 2542
90f62cf3
EB		 2543static int rtnl_group_changelink(const struct sk_buff *skb,
2544 struct net *net, int group,
e7ed828f 2545 struct ifinfomsg *ifm,
ddf9f970 2546 struct netlink_ext_ack *extack,
e7ed828f
VD		 2547 struct nlattr **tb)
2548{
d079535d 2549 struct net_device *dev, *aux;
e7ed828f
VD		 2550 int err;
2551
d079535d 2552 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2553 if (dev->group == group) {
ddf9f970 2554 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
e7ed828f
VD		 2555 if (err < 0)
2556 return err;
2557 }
2558 }
2559
2560 return 0;
2561}
2562
c21ef3e3
DA		 2563static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2564 struct netlink_ext_ack *extack)
38f7b870 2565{
3b1e0a65 2566 struct net *net = sock_net(skb->sk);
38f7b870 2567 const struct rtnl_link_ops *ops;
ba7d49b1 2568 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2569 struct net_device *dev;
ba7d49b1 2570 struct net_device *master_dev = NULL;
38f7b870
PM		 2571 struct ifinfomsg *ifm;
2572 char kind[MODULE_NAME_LEN];
2573 char ifname[IFNAMSIZ];
2574 struct nlattr *tb[IFLA_MAX+1];
2575 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2576 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2577 int err;
2578
95a5afca 2579#ifdef CONFIG_MODULES
38f7b870 2580replay:
8072f085 2581#endif
c21ef3e3 2582 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2583 if (err < 0)
2584 return err;
2585
2586 if (tb[IFLA_IFNAME])
2587 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2588 else
2589 ifname[0] = '\0';
2590
2591 ifm = nlmsg_data(nlh);
2592 if (ifm->ifi_index > 0)
881d966b 2593 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2594 else {
2595 if (ifname[0])
2596 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2597 else
2598 dev = NULL;
2599 }
38f7b870 2600
ba7d49b1
JP		 2601 if (dev) {
2602 master_dev = netdev_master_upper_dev_get(dev);
2603 if (master_dev)
2604 m_ops = master_dev->rtnl_link_ops;
2605 }
2606
e0d087af
ED		 2607 err = validate_linkmsg(dev, tb);
2608 if (err < 0)
1840bb13
TG		 2609 return err;
2610
38f7b870
PM		 2611 if (tb[IFLA_LINKINFO]) {
2612 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
fceb6435
JB		 2613 tb[IFLA_LINKINFO], ifla_info_policy,
2614 NULL);
38f7b870
PM		 2615 if (err < 0)
2616 return err;
2617 } else
2618 memset(linkinfo, 0, sizeof(linkinfo));
2619
2620 if (linkinfo[IFLA_INFO_KIND]) {
2621 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2622 ops = rtnl_link_ops_get(kind);
2623 } else {
2624 kind[0] = '\0';
2625 ops = NULL;
2626 }
2627
2628 if (1) {
4e10fd5b
SL		 2629 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2630 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2631 struct nlattr **data = NULL;
2632 struct nlattr **slave_data = NULL;
317f4810 2633 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2634
2635 if (ops) {
2636 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2637 err = nla_parse_nested(attr, ops->maxtype,
2638 linkinfo[IFLA_INFO_DATA],
fceb6435 2639 ops->policy, NULL);
38f7b870
PM		 2640 if (err < 0)
2641 return err;
2642 data = attr;
2643 }
2644 if (ops->validate) {
a8b8a889 2645 err = ops->validate(tb, data, extack);
38f7b870
PM		 2646 if (err < 0)
2647 return err;
2648 }
2649 }
2650
ba7d49b1
JP		 2651 if (m_ops) {
2652 if (m_ops->slave_maxtype &&
2653 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2654 err = nla_parse_nested(slave_attr,
2655 m_ops->slave_maxtype,
2656 linkinfo[IFLA_INFO_SLAVE_DATA],
fceb6435
JB		 2657 m_ops->slave_policy,
2658 NULL);
ba7d49b1
JP		 2659 if (err < 0)
2660 return err;
2661 slave_data = slave_attr;
2662 }
ba7d49b1
JP		 2663 }
2664
38f7b870 2665 if (dev) {
90c325e3 2666 int status = 0;
38f7b870
PM		 2667
2668 if (nlh->nlmsg_flags & NLM_F_EXCL)
2669 return -EEXIST;
2670 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2671 return -EOPNOTSUPP;
2672
2673 if (linkinfo[IFLA_INFO_DATA]) {
2674 if (!ops || ops != dev->rtnl_link_ops ||
2675 !ops->changelink)
2676 return -EOPNOTSUPP;
2677
ad744b22 2678 err = ops->changelink(dev, tb, data, extack);
38f7b870
PM		 2679 if (err < 0)
2680 return err;
ba998906 2681 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2682 }
2683
ba7d49b1
JP		 2684 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2685 if (!m_ops || !m_ops->slave_changelink)
2686 return -EOPNOTSUPP;
2687
2688 err = m_ops->slave_changelink(master_dev, dev,
17dd0ec4
MS		 2689 tb, slave_data,
2690 extack);
ba7d49b1
JP		 2691 if (err < 0)
2692 return err;
ba998906 2693 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2694 }
2695
ddf9f970
JK		 2696 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2697 status);
38f7b870
PM		 2698 }
2699
ffa934f1
PM		 2700 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2701 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2702 return rtnl_group_changelink(skb, net,
ffa934f1 2703 nla_get_u32(tb[IFLA_GROUP]),
ddf9f970 2704 ifm, extack, tb);
38f7b870 2705 return -ENODEV;
ffa934f1 2706 }
38f7b870 2707
160ca014 2708 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
38f7b870
PM		 2709 return -EOPNOTSUPP;
2710
2711 if (!ops) {
95a5afca 2712#ifdef CONFIG_MODULES
38f7b870
PM		 2713 if (kind[0]) {
2714 __rtnl_unlock();
2715 request_module("rtnl-link-%s", kind);
2716 rtnl_lock();
2717 ops = rtnl_link_ops_get(kind);
2718 if (ops)
2719 goto replay;
2720 }
2721#endif
2722 return -EOPNOTSUPP;
2723 }
2724
b0ab2fab
JP		 2725 if (!ops->setup)
2726 return -EOPNOTSUPP;
2727
5517750f 2728 if (!ifname[0]) {
38f7b870 2729 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2730 name_assign_type = NET_NAME_ENUM;
2731 }
e7199288 2732
81adee47 2733 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2734 if (IS_ERR(dest_net))
2735 return PTR_ERR(dest_net);
2736
505ce415
EB		 2737 err = -EPERM;
2738 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2739 goto out;
2740
317f4810
ND		 2741 if (tb[IFLA_LINK_NETNSID]) {
2742 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2743
2744 link_net = get_net_ns_by_id(dest_net, id);
2745 if (!link_net) {
2746 err = -EINVAL;
2747 goto out;
2748 }
06615bed
EB		 2749 err = -EPERM;
2750 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2751 goto out;
317f4810
ND		 2752 }
2753
2754 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2755 name_assign_type, ops, tb);
9c7dafbf 2756 if (IS_ERR(dev)) {
e7199288 2757 err = PTR_ERR(dev);
9c7dafbf
PE		 2758 goto out;
2759 }
2760
2761 dev->ifindex = ifm->ifi_index;
2762
0e0eee24 2763 if (ops->newlink) {
7a3f4a18
MS		 2764 err = ops->newlink(link_net ? : net, dev, tb, data,
2765 extack);
0e0eee24 2766 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2767 * and unregister it on failure after registration
2768 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2769 */
e51fb152
CW		 2770 if (err < 0) {
2771 /* If device is not registered at all, free it now */
2772 if (dev->reg_state == NETREG_UNINITIALIZED)
2773 free_netdev(dev);
0e0eee24 2774 goto out;
e51fb152 2775 }
0e0eee24 2776 } else {
2d85cba2 2777 err = register_netdevice(dev);
0e0eee24
CW		 2778 if (err < 0) {
2779 free_netdev(dev);
2780 goto out;
2781 }
fce9b9be 2782 }
3729d502 2783 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2784 if (err < 0)
2785 goto out_unregister;
bdef279b 2786 if (link_net) {
317f4810 2787 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2788 if (err < 0)
43638900 2789 goto out_unregister;
bdef279b 2790 }
160ca014 2791 if (tb[IFLA_MASTER]) {
33eaf2a6
DA		 2792 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]),
2793 extack);
160ca014
TV		 2794 if (err)
2795 goto out_unregister;
2796 }
3729d502 2797out:
317f4810
ND		 2798 if (link_net)
2799 put_net(link_net);
81adee47 2800 put_net(dest_net);
38f7b870 2801 return err;
43638900
DM		 2802out_unregister:
2803 if (ops->newlink) {
2804 LIST_HEAD(list_kill);
2805
2806 ops->dellink(dev, &list_kill);
2807 unregister_netdevice_many(&list_kill);
2808 } else {
2809 unregister_netdevice(dev);
2810 }
2811 goto out;
38f7b870
PM		 2812 }
2813}
2814
c21ef3e3
DA		 2815static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2816 struct netlink_ext_ack *extack)
711e2c33 2817{
3b1e0a65 2818 struct net *net = sock_net(skb->sk);
b60c5115 2819 struct ifinfomsg *ifm;
a3d12891 2820 char ifname[IFNAMSIZ];
b60c5115
TG		 2821 struct nlattr *tb[IFLA_MAX+1];
2822 struct net_device *dev = NULL;
2823 struct sk_buff *nskb;
339bf98f 2824 int err;
115c9b81 2825 u32 ext_filter_mask = 0;
711e2c33 2826
c21ef3e3 2827 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
b60c5115 2828 if (err < 0)
9918f230 2829 return err;
b60c5115 2830
a3d12891
ED		 2831 if (tb[IFLA_IFNAME])
2832 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2833
115c9b81
GR		 2834 if (tb[IFLA_EXT_MASK])
2835 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2836
b60c5115 2837 ifm = nlmsg_data(nlh);
a3d12891
ED		 2838 if (ifm->ifi_index > 0)
2839 dev = __dev_get_by_index(net, ifm->ifi_index);
2840 else if (tb[IFLA_IFNAME])
2841 dev = __dev_get_by_name(net, ifname);
2842 else
711e2c33 2843 return -EINVAL;
711e2c33 2844
a3d12891
ED		 2845 if (dev == NULL)
2846 return -ENODEV;
2847
115c9b81 2848 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2849 if (nskb == NULL)
2850 return -ENOBUFS;
b60c5115 2851
15e47304 2852 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
6621dd29 2853 nlh->nlmsg_seq, 0, 0, ext_filter_mask, 0, NULL);
26932566
PM		 2854 if (err < 0) {
2855 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2856 WARN_ON(err == -EMSGSIZE);
2857 kfree_skb(nskb);
a3d12891 2858 } else
15e47304 2859 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2860
b60c5115 2861 return err;
711e2c33 2862}
711e2c33 2863
115c9b81 2864static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2865{
115c9b81
GR		 2866 struct net *net = sock_net(skb->sk);
2867 struct net_device *dev;
2868 struct nlattr *tb[IFLA_MAX+1];
2869 u32 ext_filter_mask = 0;
2870 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2871 int hdrlen;
2872
2873 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2874 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2875 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2876
fceb6435 2877 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
a4b64fbe
ED		 2878 if (tb[IFLA_EXT_MASK])
2879 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2880 }
115c9b81
GR		 2881
2882 if (!ext_filter_mask)
2883 return NLMSG_GOODSIZE;
2884 /*
2885 * traverse the list of net devices and compute the minimum
2886 * buffer size based upon the filter mask.
2887 */
6853dd48
FW		 2888 rcu_read_lock();
2889 for_each_netdev_rcu(net, dev) {
115c9b81
GR		 2890 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2891 if_nlmsg_size(dev,
2892 ext_filter_mask));
2893 }
6853dd48 2894 rcu_read_unlock();
115c9b81 2895
93af2056 2896 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 2897}
2898
42bad1da 2899static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2900{
2901 int idx;
2902 int s_idx = cb->family;
2903
2904 if (s_idx == 0)
2905 s_idx = 1;
6853dd48 2906
25239cee 2907 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4 2908 int type = cb->nlh->nlmsg_type-RTM_BASE;
6853dd48
FW		 2909 struct rtnl_link *handlers;
2910 rtnl_dumpit_func dumpit;
2911
1da177e4
LT		 2912 if (idx < s_idx || idx == PF_PACKET)
2913 continue;
6853dd48
FW		 2914
2915 handlers = rtnl_dereference(rtnl_msg_handlers[idx]);
2916 if (!handlers)
1da177e4 2917 continue;
6853dd48
FW		 2918
2919 dumpit = READ_ONCE(handlers[type].dumpit);
2920 if (!dumpit)
2921 continue;
2922
0465277f 2923 if (idx > s_idx) {
1da177e4 2924 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2925 cb->prev_seq = 0;
2926 cb->seq = 0;
2927 }
6853dd48 2928 if (dumpit(skb, cb))
1da177e4
LT		 2929 break;
2930 }
2931 cb->family = idx;
2932
2933 return skb->len;
2934}
2935
395eea6c 2936struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3d3ea5af 2937 unsigned int change,
6621dd29 2938 u32 event, gfp_t flags, int *new_nsid)
1da177e4 2939{
c346dca1 2940 struct net *net = dev_net(dev);
1da177e4 2941 struct sk_buff *skb;
0ec6d3f4 2942 int err = -ENOBUFS;
c7ac8679 2943 size_t if_info_size;
1da177e4 2944
7f294054 2945 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2946 if (skb == NULL)
2947 goto errout;
1da177e4 2948
6621dd29
ND		 2949 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0, event,
2950 new_nsid);
26932566
PM		 2951 if (err < 0) {
2952 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2953 WARN_ON(err == -EMSGSIZE);
2954 kfree_skb(skb);
2955 goto errout;
2956 }
395eea6c 2957 return skb;
0ec6d3f4
TG		 2958errout:
2959 if (err < 0)
4b3da706 2960 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2961 return NULL;
2962}
2963
2964void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2965{
2966 struct net *net = dev_net(dev);
2967
2968 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2969}
2970
3d3ea5af
VY		 2971static void rtmsg_ifinfo_event(int type, struct net_device *dev,
2972 unsigned int change, u32 event,
6621dd29 2973 gfp_t flags, int *new_nsid)
395eea6c
MB		 2974{
2975 struct sk_buff *skb;
2976
ed2a80ab
ND		 2977 if (dev->reg_state != NETREG_REGISTERED)
2978 return;
2979
6621dd29 2980 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid);
395eea6c
MB		 2981 if (skb)
2982 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2983}
3d3ea5af
VY		 2984
2985void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2986 gfp_t flags)
2987{
6621dd29 2988 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, NULL);
3d3ea5af 2989}
471cb5a3 2990EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2991
6621dd29
ND		 2992void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
2993 gfp_t flags, int *new_nsid)
2994{
2995 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
2996 new_nsid);
2997}
2998
d83b0603
JF		 2999static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3000 struct net_device *dev,
1e53d5bb 3001 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 3002 int type, unsigned int flags,
b3379041 3003 int nlflags, u16 ndm_state)
d83b0603
JF		 3004{
3005 struct nlmsghdr *nlh;
3006 struct ndmsg *ndm;
3007
1c104a6b 3008 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 3009 if (!nlh)
3010 return -EMSGSIZE;
3011
3012 ndm = nlmsg_data(nlh);
3013 ndm->ndm_family = AF_BRIDGE;
3014 ndm->ndm_pad1 = 0;
3015 ndm->ndm_pad2 = 0;
3016 ndm->ndm_flags = flags;
3017 ndm->ndm_type = 0;
3018 ndm->ndm_ifindex = dev->ifindex;
b3379041 3019 ndm->ndm_state = ndm_state;
d83b0603
JF		 3020
3021 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3022 goto nla_put_failure;
1e53d5bb
HS		 3023 if (vid)
3024 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3025 goto nla_put_failure;
d83b0603 3026
053c095a
JB		 3027 nlmsg_end(skb, nlh);
3028 return 0;
d83b0603
JF		 3029
3030nla_put_failure:
3031 nlmsg_cancel(skb, nlh);
3032 return -EMSGSIZE;
3033}
3034
3ff661c3
JF		 3035static inline size_t rtnl_fdb_nlmsg_size(void)
3036{
f82ef3e1
SD		 3037 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3038 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3039 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3040 0;
3ff661c3
JF		 3041}
3042
b3379041
HS		 3043static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3044 u16 ndm_state)
3ff661c3
JF		 3045{
3046 struct net *net = dev_net(dev);
3047 struct sk_buff *skb;
3048 int err = -ENOBUFS;
3049
3050 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3051 if (!skb)
3052 goto errout;
3053
1e53d5bb 3054 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 3055 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 3056 if (err < 0) {
3057 kfree_skb(skb);
3058 goto errout;
3059 }
3060
3061 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3062 return;
3063errout:
3064 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3065}
3066
090096bf
VY		 3067/**
3068 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3069 */
3070int ndo_dflt_fdb_add(struct ndmsg *ndm,
3071 struct nlattr *tb[],
3072 struct net_device *dev,
f6f6424b 3073 const unsigned char *addr, u16 vid,
090096bf
VY		 3074 u16 flags)
3075{
3076 int err = -EINVAL;
3077
3078 /* If aging addresses are supported device will need to
3079 * implement its own handler for this.
3080 */
3081 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3082 pr_info("%s: FDB only supports static addresses\n", dev->name);
3083 return err;
3084 }
3085
65891fea
OG		 3086 if (vid) {
3087 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3088 return err;
3089 }
3090
090096bf
VY		 3091 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3092 err = dev_uc_add_excl(dev, addr);
3093 else if (is_multicast_ether_addr(addr))
3094 err = dev_mc_add_excl(dev, addr);
3095
3096 /* Only return duplicate errors if NLM_F_EXCL is set */
3097 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3098 err = 0;
3099
3100 return err;
3101}
3102EXPORT_SYMBOL(ndo_dflt_fdb_add);
3103
b88d12e4
FW		 3104static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3105 struct netlink_ext_ack *extack)
f6f6424b
JP		 3106{
3107 u16 vid = 0;
3108
3109 if (vlan_attr) {
3110 if (nla_len(vlan_attr) != sizeof(u16)) {
b88d12e4 3111 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
f6f6424b
JP		 3112 return -EINVAL;
3113 }
3114
3115 vid = nla_get_u16(vlan_attr);
3116
3117 if (!vid || vid >= VLAN_VID_MASK) {
b88d12e4 3118 NL_SET_ERR_MSG(extack, "invalid vlan id");
f6f6424b
JP		 3119 return -EINVAL;
3120 }
3121 }
3122 *p_vid = vid;
3123 return 0;
3124}
3125
c21ef3e3
DA		 3126static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3127 struct netlink_ext_ack *extack)
77162022
JF		 3128{
3129 struct net *net = sock_net(skb->sk);
77162022
JF		 3130 struct ndmsg *ndm;
3131 struct nlattr *tb[NDA_MAX+1];
3132 struct net_device *dev;
3133 u8 *addr;
f6f6424b 3134 u16 vid;
77162022
JF		 3135 int err;
3136
c21ef3e3 3137 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
77162022
JF		 3138 if (err < 0)
3139 return err;
3140
3141 ndm = nlmsg_data(nlh);
3142 if (ndm->ndm_ifindex == 0) {
b88d12e4 3143 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 3144 return -EINVAL;
3145 }
3146
3147 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3148 if (dev == NULL) {
b88d12e4 3149 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 3150 return -ENODEV;
3151 }
3152
3153 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 3154 NL_SET_ERR_MSG(extack, "invalid address");
77162022
JF		 3155 return -EINVAL;
3156 }
3157
3158 addr = nla_data(tb[NDA_LLADDR]);
77162022 3159
b88d12e4 3160 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 3161 if (err)
3162 return err;
3163
77162022
JF		 3164 err = -EOPNOTSUPP;
3165
3166 /* Support fdb on master device the net/bridge default case */
3167 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3168 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3169 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3170 const struct net_device_ops *ops = br_dev->netdev_ops;
3171
f6f6424b
JP		 3172 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3173 nlh->nlmsg_flags);
77162022
JF		 3174 if (err)
3175 goto out;
3176 else
3177 ndm->ndm_flags &= ~NTF_MASTER;
3178 }
3179
3180 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3181 if ((ndm->ndm_flags & NTF_SELF)) {
3182 if (dev->netdev_ops->ndo_fdb_add)
3183 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 3184 vid,
090096bf
VY		 3185 nlh->nlmsg_flags);
3186 else
f6f6424b 3187 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 3188 nlh->nlmsg_flags);
77162022 3189
3ff661c3 3190 if (!err) {
b3379041
HS		 3191 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3192 ndm->ndm_state);
77162022 3193 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3194 }
77162022
JF		 3195 }
3196out:
3197 return err;
3198}
3199
090096bf
VY		 3200/**
3201 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3202 */
3203int ndo_dflt_fdb_del(struct ndmsg *ndm,
3204 struct nlattr *tb[],
3205 struct net_device *dev,
f6f6424b 3206 const unsigned char *addr, u16 vid)
090096bf 3207{
c8a89c4a 3208 int err = -EINVAL;
090096bf
VY		 3209
3210 /* If aging addresses are supported device will need to
3211 * implement its own handler for this.
3212 */
64535993 3213 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 3214 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 3215 return err;
090096bf
VY		 3216 }
3217
3218 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3219 err = dev_uc_del(dev, addr);
3220 else if (is_multicast_ether_addr(addr))
3221 err = dev_mc_del(dev, addr);
090096bf
VY		 3222
3223 return err;
3224}
3225EXPORT_SYMBOL(ndo_dflt_fdb_del);
3226
c21ef3e3
DA		 3227static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3228 struct netlink_ext_ack *extack)
77162022
JF		 3229{
3230 struct net *net = sock_net(skb->sk);
3231 struct ndmsg *ndm;
1690be63 3232 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 3233 struct net_device *dev;
3234 int err = -EINVAL;
3235 __u8 *addr;
f6f6424b 3236 u16 vid;
77162022 3237
90f62cf3 3238 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 3239 return -EPERM;
3240
c21ef3e3 3241 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
1690be63
VY		 3242 if (err < 0)
3243 return err;
77162022
JF		 3244
3245 ndm = nlmsg_data(nlh);
3246 if (ndm->ndm_ifindex == 0) {
b88d12e4 3247 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 3248 return -EINVAL;
3249 }
3250
3251 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3252 if (dev == NULL) {
b88d12e4 3253 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 3254 return -ENODEV;
3255 }
3256
1690be63 3257 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 3258 NL_SET_ERR_MSG(extack, "invalid address");
1690be63
VY		 3259 return -EINVAL;
3260 }
3261
3262 addr = nla_data(tb[NDA_LLADDR]);
77162022 3263
b88d12e4 3264 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 3265 if (err)
3266 return err;
3267
77162022
JF		 3268 err = -EOPNOTSUPP;
3269
3270 /* Support fdb on master device the net/bridge default case */
3271 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3272 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3273 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3274 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 3275
898e5061 3276 if (ops->ndo_fdb_del)
f6f6424b 3277 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 3278
3279 if (err)
3280 goto out;
3281 else
3282 ndm->ndm_flags &= ~NTF_MASTER;
3283 }
3284
3285 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3286 if (ndm->ndm_flags & NTF_SELF) {
3287 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 3288 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3289 vid);
090096bf 3290 else
f6f6424b 3291 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 3292
3ff661c3 3293 if (!err) {
b3379041
HS		 3294 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3295 ndm->ndm_state);
77162022 3296 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3297 }
77162022
JF		 3298 }
3299out:
3300 return err;
3301}
3302
d83b0603
JF		 3303static int nlmsg_populate_fdb(struct sk_buff *skb,
3304 struct netlink_callback *cb,
3305 struct net_device *dev,
3306 int *idx,
3307 struct netdev_hw_addr_list *list)
3308{
3309 struct netdev_hw_addr *ha;
3310 int err;
15e47304 3311 u32 portid, seq;
d83b0603 3312
15e47304 3313 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 3314 seq = cb->nlh->nlmsg_seq;
3315
3316 list_for_each_entry(ha, &list->list, list) {
d297653d 3317 if (*idx < cb->args[2])
d83b0603
JF		 3318 goto skip;
3319
1e53d5bb 3320 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 3321 portid, seq,
1c104a6b 3322 RTM_NEWNEIGH, NTF_SELF,
b3379041 3323 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 3324 if (err < 0)
3325 return err;
3326skip:
3327 *idx += 1;
3328 }
3329 return 0;
3330}
3331
3332/**
2c53040f 3333 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 3334 * @nlh: netlink message header
3335 * @dev: netdevice
3336 *
3337 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 3338 * Returns number of addresses from list put in skb.
d83b0603
JF		 3339 */
3340int ndo_dflt_fdb_dump(struct sk_buff *skb,
3341 struct netlink_callback *cb,
3342 struct net_device *dev,
5d5eacb3 3343 struct net_device *filter_dev,
d297653d 3344 int *idx)
d83b0603
JF		 3345{
3346 int err;
3347
3348 netif_addr_lock_bh(dev);
d297653d 3349 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 3350 if (err)
3351 goto out;
2934c9db 3352 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 3353out:
3354 netif_addr_unlock_bh(dev);
d297653d 3355 return err;
d83b0603
JF		 3356}
3357EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3358
77162022
JF		 3359static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3360{
77162022 3361 struct net_device *dev;
5e6d2435 3362 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3363 struct net_device *br_dev = NULL;
3364 const struct net_device_ops *ops = NULL;
3365 const struct net_device_ops *cops = NULL;
3366 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3367 struct net *net = sock_net(skb->sk);
d297653d 3368 struct hlist_head *head;
5e6d2435
JHS		 3369 int brport_idx = 0;
3370 int br_idx = 0;
d297653d
RP		 3371 int h, s_h;
3372 int idx = 0, s_idx;
3373 int err = 0;
3374 int fidx = 0;
5e6d2435 3375
0ff50e83
AP		 3376 err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3377 IFLA_MAX, ifla_policy, NULL);
3378 if (err < 0) {
3379 return -EINVAL;
3380 } else if (err == 0) {
5e6d2435
JHS		 3381 if (tb[IFLA_MASTER])
3382 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3383 }
3384
3385 brport_idx = ifm->ifi_index;
3386
3387 if (br_idx) {
3388 br_dev = __dev_get_by_index(net, br_idx);
3389 if (!br_dev)
3390 return -ENODEV;
3391
3392 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3393 }
3394
d297653d
RP		 3395 s_h = cb->args[0];
3396 s_idx = cb->args[1];
5e6d2435 3397
d297653d
RP		 3398 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3399 idx = 0;
3400 head = &net->dev_index_head[h];
3401 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 3402
d297653d 3403 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 3404 continue;
3405
d297653d
RP		 3406 if (!br_idx) { /* user did not specify a specific bridge */
3407 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3408 br_dev = netdev_master_upper_dev_get(dev);
3409 cops = br_dev->netdev_ops;
3410 }
3411 } else {
3412 if (dev != br_dev &&
3413 !(dev->priv_flags & IFF_BRIDGE_PORT))
3414 continue;
5e6d2435 3415
d297653d
RP		 3416 if (br_dev != netdev_master_upper_dev_get(dev) &&
3417 !(dev->priv_flags & IFF_EBRIDGE))
3418 continue;
3419 cops = ops;
3420 }
77162022 3421
d297653d
RP		 3422 if (idx < s_idx)
3423 goto cont;
77162022 3424
d297653d
RP		 3425 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3426 if (cops && cops->ndo_fdb_dump) {
3427 err = cops->ndo_fdb_dump(skb, cb,
3428 br_dev, dev,
3429 &fidx);
3430 if (err == -EMSGSIZE)
3431 goto out;
3432 }
3433 }
5e6d2435 3434
d297653d
RP		 3435 if (dev->netdev_ops->ndo_fdb_dump)
3436 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3437 dev, NULL,
3438 &fidx);
3439 else
3440 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3441 &fidx);
3442 if (err == -EMSGSIZE)
3443 goto out;
3444
3445 cops = NULL;
3446
3447 /* reset fdb offset to 0 for rest of the interfaces */
3448 cb->args[2] = 0;
3449 fidx = 0;
3450cont:
3451 idx++;
3452 }
77162022 3453 }
77162022 3454
d297653d
RP		 3455out:
3456 cb->args[0] = h;
3457 cb->args[1] = idx;
3458 cb->args[2] = fidx;
3459
77162022
JF		 3460 return skb->len;
3461}
3462
2c3c031c
SF		 3463static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3464 unsigned int attrnum, unsigned int flag)
3465{
3466 if (mask & flag)
3467 return nla_put_u8(skb, attrnum, !!(flags & flag));
3468 return 0;
3469}
3470
815cccbf 3471int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3472 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3473 u32 flags, u32 mask, int nlflags,
3474 u32 filter_mask,
3475 int (*vlan_fill)(struct sk_buff *skb,
3476 struct net_device *dev,
3477 u32 filter_mask))
815cccbf
JF		 3478{
3479 struct nlmsghdr *nlh;
3480 struct ifinfomsg *ifm;
3481 struct nlattr *br_afspec;
2c3c031c 3482 struct nlattr *protinfo;
815cccbf 3483 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3484 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3485 int err = 0;
815cccbf 3486
46c264da 3487 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3488 if (nlh == NULL)
3489 return -EMSGSIZE;
3490
3491 ifm = nlmsg_data(nlh);
3492 ifm->ifi_family = AF_BRIDGE;
3493 ifm->__ifi_pad = 0;
3494 ifm->ifi_type = dev->type;
3495 ifm->ifi_index = dev->ifindex;
3496 ifm->ifi_flags = dev_get_flags(dev);
3497 ifm->ifi_change = 0;
3498
3499
3500 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3501 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3502 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3503 (br_dev &&
3504 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3505 (dev->addr_len &&
3506 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3507 (dev->ifindex != dev_get_iflink(dev) &&
3508 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3509 goto nla_put_failure;
3510
3511 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3512 if (!br_afspec)
3513 goto nla_put_failure;
3514
1d460b98 3515 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3516 nla_nest_cancel(skb, br_afspec);
3517 goto nla_put_failure;
3518 }
1d460b98
RP		 3519
3520 if (mode != BRIDGE_MODE_UNDEF) {
3521 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3522 nla_nest_cancel(skb, br_afspec);
3523 goto nla_put_failure;
3524 }
3525 }
7d4f8d87
SF		 3526 if (vlan_fill) {
3527 err = vlan_fill(skb, dev, filter_mask);
3528 if (err) {
3529 nla_nest_cancel(skb, br_afspec);
3530 goto nla_put_failure;
3531 }
3532 }
815cccbf
JF		 3533 nla_nest_end(skb, br_afspec);
3534
2c3c031c
SF		 3535 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3536 if (!protinfo)
3537 goto nla_put_failure;
3538
3539 if (brport_nla_put_flag(skb, flags, mask,
3540 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3541 brport_nla_put_flag(skb, flags, mask,
3542 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3543 brport_nla_put_flag(skb, flags, mask,
3544 IFLA_BRPORT_FAST_LEAVE,
3545 BR_MULTICAST_FAST_LEAVE) ||
3546 brport_nla_put_flag(skb, flags, mask,
3547 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3548 brport_nla_put_flag(skb, flags, mask,
3549 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3550 brport_nla_put_flag(skb, flags, mask,
3551 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3552 brport_nla_put_flag(skb, flags, mask,
3553 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3554 brport_nla_put_flag(skb, flags, mask,
3555 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3556 nla_nest_cancel(skb, protinfo);
3557 goto nla_put_failure;
3558 }
3559
3560 nla_nest_end(skb, protinfo);
3561
053c095a
JB		 3562 nlmsg_end(skb, nlh);
3563 return 0;
815cccbf
JF		 3564nla_put_failure:
3565 nlmsg_cancel(skb, nlh);
7d4f8d87 3566 return err ? err : -EMSGSIZE;
815cccbf 3567}
7d4f8d87 3568EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3569
e5a55a89
JF		 3570static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3571{
3572 struct net *net = sock_net(skb->sk);
3573 struct net_device *dev;
3574 int idx = 0;
3575 u32 portid = NETLINK_CB(cb->skb).portid;
3576 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3577 u32 filter_mask = 0;
d64f69b0 3578 int err;
6cbdceeb 3579
aa68c20f
TG		 3580 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3581 struct nlattr *extfilt;
3582
3583 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3584 IFLA_EXT_MASK);
3585 if (extfilt) {
3586 if (nla_len(extfilt) < sizeof(filter_mask))
3587 return -EINVAL;
3588
3589 filter_mask = nla_get_u32(extfilt);
3590 }
3591 }
e5a55a89
JF		 3592
3593 rcu_read_lock();
3594 for_each_netdev_rcu(net, dev) {
3595 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3596 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3597
898e5061 3598 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3599 if (idx >= cb->args[0]) {
3600 err = br_dev->netdev_ops->ndo_bridge_getlink(
3601 skb, portid, seq, dev,
3602 filter_mask, NLM_F_MULTI);
f6c5775f
DA		 3603 if (err < 0 && err != -EOPNOTSUPP) {
3604 if (likely(skb->len))
3605 break;
3606
3607 goto out_err;
3608 }
d64f69b0 3609 }
25b1e679 3610 idx++;
e5a55a89
JF		 3611 }
3612
3613 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3614 if (idx >= cb->args[0]) {
3615 err = ops->ndo_bridge_getlink(skb, portid,
3616 seq, dev,
3617 filter_mask,
3618 NLM_F_MULTI);
f6c5775f
DA		 3619 if (err < 0 && err != -EOPNOTSUPP) {
3620 if (likely(skb->len))
3621 break;
3622
3623 goto out_err;
3624 }
d64f69b0 3625 }
25b1e679 3626 idx++;
e5a55a89
JF		 3627 }
3628 }
f6c5775f
DA		 3629 err = skb->len;
3630out_err:
e5a55a89
JF		 3631 rcu_read_unlock();
3632 cb->args[0] = idx;
3633
f6c5775f 3634 return err;
e5a55a89
JF		 3635}
3636
2469ffd7
JF		 3637static inline size_t bridge_nlmsg_size(void)
3638{
3639 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3640 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3641 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3642 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3643 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3644 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3645 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3646 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3647 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3648 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3649 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3650}
3651
02dba438 3652static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3653{
3654 struct net *net = dev_net(dev);
2469ffd7
JF		 3655 struct sk_buff *skb;
3656 int err = -EOPNOTSUPP;
3657
02dba438
RP		 3658 if (!dev->netdev_ops->ndo_bridge_getlink)
3659 return 0;
3660
2469ffd7
JF		 3661 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3662 if (!skb) {
3663 err = -ENOMEM;
3664 goto errout;
3665 }
3666
46c264da 3667 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3668 if (err < 0)
3669 goto errout;
2469ffd7 3670
59ccaaaa
RP		 3671 if (!skb->len)
3672 goto errout;
3673
2469ffd7
JF		 3674 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3675 return 0;
3676errout:
3677 WARN_ON(err == -EMSGSIZE);
3678 kfree_skb(skb);
59ccaaaa
RP		 3679 if (err)
3680 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3681 return err;
3682}
3683
c21ef3e3
DA		 3684static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3685 struct netlink_ext_ack *extack)
e5a55a89
JF		 3686{
3687 struct net *net = sock_net(skb->sk);
3688 struct ifinfomsg *ifm;
3689 struct net_device *dev;
2469ffd7
JF		 3690 struct nlattr *br_spec, *attr = NULL;
3691 int rem, err = -EOPNOTSUPP;
4de8b413 3692 u16 flags = 0;
c38e01b8 3693 bool have_flags = false;
e5a55a89
JF		 3694
3695 if (nlmsg_len(nlh) < sizeof(*ifm))
3696 return -EINVAL;
3697
3698 ifm = nlmsg_data(nlh);
3699 if (ifm->ifi_family != AF_BRIDGE)
3700 return -EPFNOSUPPORT;
3701
3702 dev = __dev_get_by_index(net, ifm->ifi_index);
3703 if (!dev) {
b88d12e4 3704 NL_SET_ERR_MSG(extack, "unknown ifindex");
e5a55a89
JF		 3705 return -ENODEV;
3706 }
3707
2469ffd7
JF		 3708 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3709 if (br_spec) {
3710 nla_for_each_nested(attr, br_spec, rem) {
3711 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3712 if (nla_len(attr) < sizeof(flags))
3713 return -EINVAL;
3714
c38e01b8 3715 have_flags = true;
2469ffd7
JF		 3716 flags = nla_get_u16(attr);
3717 break;
3718 }
3719 }
3720 }
3721
3722 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3723 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3724
3725 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3726 err = -EOPNOTSUPP;
3727 goto out;
3728 }
3729
add511b3 3730 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3731 if (err)
3732 goto out;
2469ffd7
JF		 3733
3734 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3735 }
3736
2469ffd7
JF		 3737 if ((flags & BRIDGE_FLAGS_SELF)) {
3738 if (!dev->netdev_ops->ndo_bridge_setlink)
3739 err = -EOPNOTSUPP;
3740 else
add511b3
RP		 3741 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3742 flags);
02dba438 3743 if (!err) {
2469ffd7 3744 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3745
3746 /* Generate event to notify upper layer of bridge
3747 * change
3748 */
3749 err = rtnl_bridge_notify(dev);
3750 }
2469ffd7 3751 }
e5a55a89 3752
c38e01b8 3753 if (have_flags)
2469ffd7 3754 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3755out:
3756 return err;
3757}
3758
c21ef3e3
DA		 3759static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3760 struct netlink_ext_ack *extack)
407af329
VY		 3761{
3762 struct net *net = sock_net(skb->sk);
3763 struct ifinfomsg *ifm;
3764 struct net_device *dev;
3765 struct nlattr *br_spec, *attr = NULL;
3766 int rem, err = -EOPNOTSUPP;
4de8b413 3767 u16 flags = 0;
407af329
VY		 3768 bool have_flags = false;
3769
3770 if (nlmsg_len(nlh) < sizeof(*ifm))
3771 return -EINVAL;
3772
3773 ifm = nlmsg_data(nlh);
3774 if (ifm->ifi_family != AF_BRIDGE)
3775 return -EPFNOSUPPORT;
3776
3777 dev = __dev_get_by_index(net, ifm->ifi_index);
3778 if (!dev) {
b88d12e4 3779 NL_SET_ERR_MSG(extack, "unknown ifindex");
407af329
VY		 3780 return -ENODEV;
3781 }
3782
3783 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3784 if (br_spec) {
3785 nla_for_each_nested(attr, br_spec, rem) {
3786 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3787 if (nla_len(attr) < sizeof(flags))
3788 return -EINVAL;
3789
407af329
VY		 3790 have_flags = true;
3791 flags = nla_get_u16(attr);
3792 break;
3793 }
3794 }
3795 }
3796
407af329
VY		 3797 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3798 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3799
3800 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3801 err = -EOPNOTSUPP;
3802 goto out;
3803 }
3804
add511b3 3805 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3806 if (err)
3807 goto out;
3808
3809 flags &= ~BRIDGE_FLAGS_MASTER;
3810 }
3811
3812 if ((flags & BRIDGE_FLAGS_SELF)) {
3813 if (!dev->netdev_ops->ndo_bridge_dellink)
3814 err = -EOPNOTSUPP;
3815 else
add511b3
RP		 3816 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3817 flags);
407af329 3818
02dba438 3819 if (!err) {
407af329 3820 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3821
3822 /* Generate event to notify upper layer of bridge
3823 * change
3824 */
3825 err = rtnl_bridge_notify(dev);
3826 }
407af329
VY		 3827 }
3828
3829 if (have_flags)
3830 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3831out:
3832 return err;
3833}
3834
e8872a25
NA		 3835static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3836{
3837 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3838 (!idxattr || idxattr == attrid);
3839}
3840
69ae6ad2
NF		 3841#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3842static int rtnl_get_offload_stats_attr_size(int attr_id)
3843{
3844 switch (attr_id) {
3845 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3846 return sizeof(struct rtnl_link_stats64);
3847 }
3848
3849 return 0;
3850}
3851
3852static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3853 int *prividx)
3854{
3855 struct nlattr *attr = NULL;
3856 int attr_id, size;
3857 void *attr_data;
3858 int err;
3859
3860 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3861 dev->netdev_ops->ndo_get_offload_stats))
3862 return -ENODATA;
3863
3864 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3865 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3866 if (attr_id < *prividx)
3867 continue;
3868
3869 size = rtnl_get_offload_stats_attr_size(attr_id);
3870 if (!size)
3871 continue;
3872
3df5b3c6 3873 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 3874 continue;
3875
3876 attr = nla_reserve_64bit(skb, attr_id, size,
3877 IFLA_OFFLOAD_XSTATS_UNSPEC);
3878 if (!attr)
3879 goto nla_put_failure;
3880
3881 attr_data = nla_data(attr);
3882 memset(attr_data, 0, size);
3883 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3884 attr_data);
3885 if (err)
3886 goto get_offload_stats_failure;
3887 }
3888
3889 if (!attr)
3890 return -ENODATA;
3891
3892 *prividx = 0;
3893 return 0;
3894
3895nla_put_failure:
3896 err = -EMSGSIZE;
3897get_offload_stats_failure:
3898 *prividx = attr_id;
3899 return err;
3900}
3901
3902static int rtnl_get_offload_stats_size(const struct net_device *dev)
3903{
3904 int nla_size = 0;
3905 int attr_id;
3906 int size;
3907
3908 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3909 dev->netdev_ops->ndo_get_offload_stats))
3910 return 0;
3911
3912 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3913 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3df5b3c6 3914 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 3915 continue;
3916 size = rtnl_get_offload_stats_attr_size(attr_id);
3917 nla_size += nla_total_size_64bit(size);
3918 }
3919
3920 if (nla_size != 0)
3921 nla_size += nla_total_size(0);
3922
3923 return nla_size;
3924}
3925
10c9ead9
RP		 3926static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3927 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 3928 unsigned int flags, unsigned int filter_mask,
3929 int *idxattr, int *prividx)
10c9ead9
RP		 3930{
3931 struct if_stats_msg *ifsm;
3932 struct nlmsghdr *nlh;
3933 struct nlattr *attr;
e8872a25 3934 int s_prividx = *prividx;
69ae6ad2 3935 int err;
10c9ead9
RP		 3936
3937 ASSERT_RTNL();
3938
3939 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3940 if (!nlh)
3941 return -EMSGSIZE;
3942
3943 ifsm = nlmsg_data(nlh);
ce024f42
NA		 3944 ifsm->family = PF_UNSPEC;
3945 ifsm->pad1 = 0;
3946 ifsm->pad2 = 0;
10c9ead9
RP		 3947 ifsm->ifindex = dev->ifindex;
3948 ifsm->filter_mask = filter_mask;
3949
e8872a25 3950 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 3951 struct rtnl_link_stats64 *sp;
10c9ead9 3952
58414d32
ND		 3953 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3954 sizeof(struct rtnl_link_stats64),
3955 IFLA_STATS_UNSPEC);
10c9ead9
RP		 3956 if (!attr)
3957 goto nla_put_failure;
3958
3959 sp = nla_data(attr);
3960 dev_get_stats(dev, sp);
3961 }
3962
97a47fac
NA		 3963 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3964 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3965
3966 if (ops && ops->fill_linkxstats) {
97a47fac
NA		 3967 *idxattr = IFLA_STATS_LINK_XSTATS;
3968 attr = nla_nest_start(skb,
3969 IFLA_STATS_LINK_XSTATS);
3970 if (!attr)
3971 goto nla_put_failure;
3972
80e73cc5
NA		 3973 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3974 nla_nest_end(skb, attr);
3975 if (err)
3976 goto nla_put_failure;
3977 *idxattr = 0;
3978 }
3979 }
3980
3981 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3982 *idxattr)) {
3983 const struct rtnl_link_ops *ops = NULL;
3984 const struct net_device *master;
3985
3986 master = netdev_master_upper_dev_get(dev);
3987 if (master)
3988 ops = master->rtnl_link_ops;
3989 if (ops && ops->fill_linkxstats) {
80e73cc5
NA		 3990 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3991 attr = nla_nest_start(skb,
3992 IFLA_STATS_LINK_XSTATS_SLAVE);
3993 if (!attr)
3994 goto nla_put_failure;
3995
3996 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 3997 nla_nest_end(skb, attr);
3998 if (err)
3999 goto nla_put_failure;
4000 *idxattr = 0;
4001 }
4002 }
4003
69ae6ad2
NF		 4004 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
4005 *idxattr)) {
4006 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
4007 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
4008 if (!attr)
4009 goto nla_put_failure;
4010
4011 err = rtnl_get_offload_stats(skb, dev, prividx);
4012 if (err == -ENODATA)
4013 nla_nest_cancel(skb, attr);
4014 else
4015 nla_nest_end(skb, attr);
4016
4017 if (err && err != -ENODATA)
4018 goto nla_put_failure;
4019 *idxattr = 0;
4020 }
4021
aefb4d4a
RS		 4022 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
4023 struct rtnl_af_ops *af_ops;
4024
4025 *idxattr = IFLA_STATS_AF_SPEC;
4026 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
4027 if (!attr)
4028 goto nla_put_failure;
4029
5fa85a09
FW		 4030 rcu_read_lock();
4031 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 4032 if (af_ops->fill_stats_af) {
4033 struct nlattr *af;
4034 int err;
4035
4036 af = nla_nest_start(skb, af_ops->family);
5fa85a09
FW		 4037 if (!af) {
4038 rcu_read_unlock();
aefb4d4a 4039 goto nla_put_failure;
5fa85a09 4040 }
aefb4d4a
RS		 4041 err = af_ops->fill_stats_af(skb, dev);
4042
5fa85a09 4043 if (err == -ENODATA) {
aefb4d4a 4044 nla_nest_cancel(skb, af);
5fa85a09
FW		 4045 } else if (err < 0) {
4046 rcu_read_unlock();
aefb4d4a 4047 goto nla_put_failure;
5fa85a09 4048 }
aefb4d4a
RS		 4049
4050 nla_nest_end(skb, af);
4051 }
4052 }
5fa85a09 4053 rcu_read_unlock();
aefb4d4a
RS		 4054
4055 nla_nest_end(skb, attr);
4056
4057 *idxattr = 0;
4058 }
4059
10c9ead9
RP		 4060 nlmsg_end(skb, nlh);
4061
4062 return 0;
4063
4064nla_put_failure:
e8872a25
NA		 4065 /* not a multi message or no progress mean a real error */
4066 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
4067 nlmsg_cancel(skb, nlh);
4068 else
4069 nlmsg_end(skb, nlh);
10c9ead9
RP		 4070
4071 return -EMSGSIZE;
4072}
4073
10c9ead9
RP		 4074static size_t if_nlmsg_stats_size(const struct net_device *dev,
4075 u32 filter_mask)
4076{
4077 size_t size = 0;
4078
e8872a25 4079 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 4080 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
4081
97a47fac
NA		 4082 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
4083 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 4084 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 4085
4086 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 4087 size += nla_total_size(ops->get_linkxstats_size(dev,
4088 attr));
97a47fac
NA		 4089 /* for IFLA_STATS_LINK_XSTATS */
4090 size += nla_total_size(0);
4091 }
4092 }
4093
80e73cc5
NA		 4094 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
4095 struct net_device *_dev = (struct net_device *)dev;
4096 const struct rtnl_link_ops *ops = NULL;
4097 const struct net_device *master;
4098
4099 /* netdev_master_upper_dev_get can't take const */
4100 master = netdev_master_upper_dev_get(_dev);
4101 if (master)
4102 ops = master->rtnl_link_ops;
4103 if (ops && ops->get_linkxstats_size) {
4104 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4105
4106 size += nla_total_size(ops->get_linkxstats_size(dev,
4107 attr));
4108 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4109 size += nla_total_size(0);
4110 }
4111 }
4112
69ae6ad2
NF		 4113 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4114 size += rtnl_get_offload_stats_size(dev);
4115
aefb4d4a
RS		 4116 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4117 struct rtnl_af_ops *af_ops;
4118
4119 /* for IFLA_STATS_AF_SPEC */
4120 size += nla_total_size(0);
4121
5fa85a09
FW		 4122 rcu_read_lock();
4123 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 4124 if (af_ops->get_stats_af_size) {
4125 size += nla_total_size(
4126 af_ops->get_stats_af_size(dev));
4127
4128 /* for AF_* */
4129 size += nla_total_size(0);
4130 }
4131 }
5fa85a09 4132 rcu_read_unlock();
aefb4d4a
RS		 4133 }
4134
10c9ead9
RP		 4135 return size;
4136}
4137
c21ef3e3
DA		 4138static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
4139 struct netlink_ext_ack *extack)
10c9ead9
RP		 4140{
4141 struct net *net = sock_net(skb->sk);
10c9ead9 4142 struct net_device *dev = NULL;
e8872a25
NA		 4143 int idxattr = 0, prividx = 0;
4144 struct if_stats_msg *ifsm;
10c9ead9
RP		 4145 struct sk_buff *nskb;
4146 u32 filter_mask;
4147 int err;
4148
4775cc1f
MK		 4149 if (nlmsg_len(nlh) < sizeof(*ifsm))
4150 return -EINVAL;
4151
10c9ead9
RP		 4152 ifsm = nlmsg_data(nlh);
4153 if (ifsm->ifindex > 0)
4154 dev = __dev_get_by_index(net, ifsm->ifindex);
4155 else
4156 return -EINVAL;
4157
4158 if (!dev)
4159 return -ENODEV;
4160
4161 filter_mask = ifsm->filter_mask;
4162 if (!filter_mask)
4163 return -EINVAL;
4164
4165 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4166 if (!nskb)
4167 return -ENOBUFS;
4168
4169 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4170 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 4171 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 4172 if (err < 0) {
4173 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4174 WARN_ON(err == -EMSGSIZE);
4175 kfree_skb(nskb);
4176 } else {
4177 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4178 }
4179
4180 return err;
4181}
4182
4183static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4184{
e8872a25 4185 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 4186 struct net *net = sock_net(skb->sk);
e8872a25 4187 unsigned int flags = NLM_F_MULTI;
10c9ead9 4188 struct if_stats_msg *ifsm;
10c9ead9 4189 struct hlist_head *head;
e8872a25 4190 struct net_device *dev;
10c9ead9 4191 u32 filter_mask = 0;
e8872a25 4192 int idx = 0;
10c9ead9
RP		 4193
4194 s_h = cb->args[0];
4195 s_idx = cb->args[1];
e8872a25
NA		 4196 s_idxattr = cb->args[2];
4197 s_prividx = cb->args[3];
10c9ead9
RP		 4198
4199 cb->seq = net->dev_base_seq;
4200
4775cc1f
MK		 4201 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4202 return -EINVAL;
4203
10c9ead9
RP		 4204 ifsm = nlmsg_data(cb->nlh);
4205 filter_mask = ifsm->filter_mask;
4206 if (!filter_mask)
4207 return -EINVAL;
4208
4209 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4210 idx = 0;
4211 head = &net->dev_index_head[h];
4212 hlist_for_each_entry(dev, head, index_hlist) {
4213 if (idx < s_idx)
4214 goto cont;
4215 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4216 NETLINK_CB(cb->skb).portid,
4217 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 4218 flags, filter_mask,
4219 &s_idxattr, &s_prividx);
10c9ead9
RP		 4220 /* If we ran out of room on the first message,
4221 * we're in trouble
4222 */
4223 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4224
4225 if (err < 0)
4226 goto out;
e8872a25
NA		 4227 s_prividx = 0;
4228 s_idxattr = 0;
10c9ead9
RP		 4229 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4230cont:
4231 idx++;
4232 }
4233 }
4234out:
e8872a25
NA		 4235 cb->args[3] = s_prividx;
4236 cb->args[2] = s_idxattr;
10c9ead9
RP		 4237 cb->args[1] = idx;
4238 cb->args[0] = h;
4239
4240 return skb->len;
4241}
4242
1da177e4
LT		 4243/* Process one rtnetlink message. */
4244
2d4bc933
JB		 4245static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4246 struct netlink_ext_ack *extack)
1da177e4 4247{
3b1e0a65 4248 struct net *net = sock_net(skb->sk);
6853dd48
FW		 4249 struct rtnl_link *handlers;
4250 int err = -EOPNOTSUPP;
e2849863 4251 rtnl_doit_func doit;
62256f98 4252 unsigned int flags;
617cfc75 4253 int kind;
1da177e4
LT		 4254 int family;
4255 int type;
1da177e4 4256
1da177e4 4257 type = nlh->nlmsg_type;
1da177e4 4258 if (type > RTM_MAX)
038890fe 4259 return -EOPNOTSUPP;
1da177e4
LT		 4260
4261 type -= RTM_BASE;
4262
4263 /* All the messages must have at least 1 byte length */
573ce260 4264 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 4265 return 0;
4266
573ce260 4267 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 4268 kind = type&3;
4269
90f62cf3 4270 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 4271 return -EPERM;
1da177e4 4272
5c2bb9b6 4273 if (family >= ARRAY_SIZE(rtnl_msg_handlers))
6853dd48
FW		 4274 family = PF_UNSPEC;
4275
4276 rcu_read_lock();
4277 handlers = rcu_dereference(rtnl_msg_handlers[family]);
4278 if (!handlers) {
4279 family = PF_UNSPEC;
4280 handlers = rcu_dereference(rtnl_msg_handlers[family]);
4281 }
4282
b8f3ab42 4283 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 4284 struct sock *rtnl;
e2849863 4285 rtnl_dumpit_func dumpit;
c7ac8679 4286 u16 min_dump_alloc = 0;
1da177e4 4287
6853dd48
FW		 4288 dumpit = READ_ONCE(handlers[type].dumpit);
4289 if (!dumpit) {
4290 family = PF_UNSPEC;
4291 handlers = rcu_dereference(rtnl_msg_handlers[PF_UNSPEC]);
4292 if (!handlers)
4293 goto err_unlock;
0cc09020 4294
6853dd48
FW		 4295 dumpit = READ_ONCE(handlers[type].dumpit);
4296 if (!dumpit)
4297 goto err_unlock;
4298 }
e1fa6d21 4299
019a3169
FW		 4300 refcount_inc(&rtnl_msg_handlers_ref[family]);
4301
5c2bb9b6 4302 if (type == RTM_GETLINK - RTM_BASE)
e1fa6d21 4303 min_dump_alloc = rtnl_calcit(skb, nlh);
9ac4a169 4304
6853dd48
FW		 4305 rcu_read_unlock();
4306
97c53cac 4307 rtnl = net->rtnl;
80d326fa
PNA		 4308 {
4309 struct netlink_dump_control c = {
4310 .dump = dumpit,
4311 .min_dump_alloc = min_dump_alloc,
4312 };
4313 err = netlink_dump_start(rtnl, skb, nlh, &c);
4314 }
019a3169 4315 refcount_dec(&rtnl_msg_handlers_ref[family]);
2907c35f 4316 return err;
1da177e4
LT		 4317 }
4318
8caa38b5
FW		 4319 doit = READ_ONCE(handlers[type].doit);
4320 if (!doit) {
4321 family = PF_UNSPEC;
4322 handlers = rcu_dereference(rtnl_msg_handlers[family]);
4323 }
4324
62256f98
FW		 4325 flags = READ_ONCE(handlers[type].flags);
4326 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
4327 refcount_inc(&rtnl_msg_handlers_ref[family]);
4328 doit = READ_ONCE(handlers[type].doit);
4329 rcu_read_unlock();
4330 if (doit)
4331 err = doit(skb, nlh, extack);
4332 refcount_dec(&rtnl_msg_handlers_ref[family]);
4333 return err;
4334 }
4335
6853dd48 4336 rcu_read_unlock();
1da177e4 4337
6853dd48
FW		 4338 rtnl_lock();
4339 handlers = rtnl_dereference(rtnl_msg_handlers[family]);
4340 if (handlers) {
4341 doit = READ_ONCE(handlers[type].doit);
4342 if (doit)
4343 err = doit(skb, nlh, extack);
4344 }
0cc09020 4345 rtnl_unlock();
0cc09020
FW		 4346 return err;
4347
4348err_unlock:
6853dd48 4349 rcu_read_unlock();
0cc09020 4350 return -EOPNOTSUPP;
1da177e4
LT		 4351}
4352
cd40b7d3 4353static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 4354{
cd40b7d3 4355 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1da177e4
LT		 4356}
4357
5f729eaa
JG		 4358static int rtnetlink_bind(struct net *net, int group)
4359{
4360 switch (group) {
4361 case RTNLGRP_IPV4_MROUTE_R:
4362 case RTNLGRP_IPV6_MROUTE_R:
4363 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
4364 return -EPERM;
4365 break;
4366 }
4367 return 0;
4368}
4369
1da177e4
LT		 4370static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4371{
351638e7 4372 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 4373
1da177e4 4374 switch (event) {
5138e86f 4375 case NETDEV_REBOOT:
3753654e 4376 case NETDEV_CHANGEADDR:
5138e86f
VY		 4377 case NETDEV_CHANGENAME:
4378 case NETDEV_FEAT_CHANGE:
4379 case NETDEV_BONDING_FAILOVER:
5138e86f 4380 case NETDEV_NOTIFY_PEERS:
5138e86f 4381 case NETDEV_RESEND_IGMP:
5138e86f 4382 case NETDEV_CHANGEINFODATA:
3d3ea5af 4383 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
6621dd29 4384 GFP_KERNEL, NULL);
1da177e4
LT		 4385 break;
4386 default:
1da177e4
LT		 4387 break;
4388 }
4389 return NOTIFY_DONE;
4390}
4391
4392static struct notifier_block rtnetlink_dev_notifier = {
4393 .notifier_call = rtnetlink_event,
4394};
4395
97c53cac 4396
2c8c1e72 4397static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 4398{
4399 struct sock *sk;
a31f2d17
PNA		 4400 struct netlink_kernel_cfg cfg = {
4401 .groups = RTNLGRP_MAX,
4402 .input = rtnetlink_rcv,
4403 .cb_mutex = &rtnl_mutex,
9785e10a 4404 .flags = NL_CFG_F_NONROOT_RECV,
5f729eaa 4405 .bind = rtnetlink_bind,
a31f2d17
PNA		 4406 };
4407
9f00d977 4408 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 4409 if (!sk)
4410 return -ENOMEM;
97c53cac
DL		 4411 net->rtnl = sk;
4412 return 0;
4413}
4414
2c8c1e72 4415static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 4416{
775516bf
DL		 4417 netlink_kernel_release(net->rtnl);
4418 net->rtnl = NULL;
97c53cac
DL		 4419}
4420
4421static struct pernet_operations rtnetlink_net_ops = {
4422 .init = rtnetlink_net_init,
4423 .exit = rtnetlink_net_exit,
4424};
4425
1da177e4
LT		 4426void __init rtnetlink_init(void)
4427{
d38a6512
FW		 4428 int i;
4429
4430 for (i = 0; i < ARRAY_SIZE(rtnl_msg_handlers_ref); i++)
4431 refcount_set(&rtnl_msg_handlers_ref[i], 1);
4432
97c53cac 4433 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 4434 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 4435
1da177e4 4436 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 4437
c7ac8679 4438 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
b97bac64
FW		 4439 rtnl_dump_ifinfo, 0);
4440 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
4441 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
4442 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
687ad8cc 4443
b97bac64
FW		 4444 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
4445 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
4446 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
77162022 4447
b97bac64
FW		 4448 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
4449 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
4450 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, 0);
e5a55a89 4451
b97bac64
FW		 4452 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
4453 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
4454 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
10c9ead9
RP		 4455
4456 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
b97bac64 4457 0);
1da177e4 4458}
Linux 6.x block layer and io_uring tree(s)