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UBUNTU: Ubuntu-4.15.0-96.97
[mirror_ubuntu-bionic-kernel.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 */
2177db43 923 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
03ac738d 924 + nla_total_size(1) /* IFLA_PROTO_DOWN */
79e1ad14 925 + nla_total_size(4) /* IFLA_IF_NETNSID */
5e7f6597
DD		 926 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
927 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
79e1ad14 928 + 0;
339bf98f
TG		 929}
930
57b61080
SF		 931static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
932{
933 struct nlattr *vf_ports;
934 struct nlattr *vf_port;
935 int vf;
936 int err;
937
938 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
939 if (!vf_ports)
940 return -EMSGSIZE;
941
942 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
943 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 944 if (!vf_port)
945 goto nla_put_failure;
a6574349
DM		 946 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
947 goto nla_put_failure;
57b61080 948 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 949 if (err == -EMSGSIZE)
950 goto nla_put_failure;
57b61080 951 if (err) {
57b61080
SF		 952 nla_nest_cancel(skb, vf_port);
953 continue;
954 }
955 nla_nest_end(skb, vf_port);
956 }
957
958 nla_nest_end(skb, vf_ports);
959
960 return 0;
8ca94183
SF		 961
962nla_put_failure:
963 nla_nest_cancel(skb, vf_ports);
964 return -EMSGSIZE;
57b61080
SF		 965}
966
967static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
968{
969 struct nlattr *port_self;
970 int err;
971
972 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
973 if (!port_self)
974 return -EMSGSIZE;
975
976 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
977 if (err) {
978 nla_nest_cancel(skb, port_self);
8ca94183 979 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 980 }
981
982 nla_nest_end(skb, port_self);
983
984 return 0;
985}
986
c53864fd
DG		 987static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
988 u32 ext_filter_mask)
57b61080
SF		 989{
990 int err;
991
c53864fd
DG		 992 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
993 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 994 return 0;
995
996 err = rtnl_port_self_fill(skb, dev);
997 if (err)
998 return err;
999
1000 if (dev_num_vf(dev->dev.parent)) {
1001 err = rtnl_vf_ports_fill(skb, dev);
1002 if (err)
1003 return err;
1004 }
1005
1006 return 0;
1007}
1008
66cae9ed
JP		 1009static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1010{
1011 int err;
02637fce 1012 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1013
1014 err = dev_get_phys_port_id(dev, &ppid);
1015 if (err) {
1016 if (err == -EOPNOTSUPP)
1017 return 0;
1018 return err;
1019 }
1020
1021 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1022 return -EMSGSIZE;
1023
1024 return 0;
1025}
1026
db24a904
DA		 1027static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1028{
1029 char name[IFNAMSIZ];
1030 int err;
1031
1032 err = dev_get_phys_port_name(dev, name, sizeof(name));
1033 if (err) {
1034 if (err == -EOPNOTSUPP)
1035 return 0;
1036 return err;
1037 }
1038
77ef033b 1039 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
db24a904
DA		 1040 return -EMSGSIZE;
1041
1042 return 0;
1043}
1044
82f28412
JP		 1045static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1046{
1047 int err;
f8e20a9f 1048 struct switchdev_attr attr = {
6ff64f6f 1049 .orig_dev = dev,
1f868398 1050 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1051 .flags = SWITCHDEV_F_NO_RECURSE,
1052 };
82f28412 1053
f8e20a9f 1054 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1055 if (err) {
1056 if (err == -EOPNOTSUPP)
1057 return 0;
1058 return err;
1059 }
1060
42275bd8
SF		 1061 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1062 attr.u.ppid.id))
82f28412
JP		 1063 return -EMSGSIZE;
1064
1065 return 0;
1066}
1067
b22b941b
HFS		 1068static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1069 struct net_device *dev)
1070{
550bce59 1071 struct rtnl_link_stats64 *sp;
b22b941b 1072 struct nlattr *attr;
18402843 1073
58414d32
ND		 1074 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1075 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1076 if (!attr)
1077 return -EMSGSIZE;
1078
550bce59
RP		 1079 sp = nla_data(attr);
1080 dev_get_stats(dev, sp);
b22b941b 1081
550bce59
RP		 1082 attr = nla_reserve(skb, IFLA_STATS,
1083 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1084 if (!attr)
1085 return -EMSGSIZE;
1086
550bce59 1087 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1088
1089 return 0;
1090}
1091
1092static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1093 struct net_device *dev,
1094 int vfs_num,
1095 struct nlattr *vfinfo)
1096{
1097 struct ifla_vf_rss_query_en vf_rss_query_en;
79aab093 1098 struct nlattr *vf, *vfstats, *vfvlanlist;
b22b941b 1099 struct ifla_vf_link_state vf_linkstate;
79aab093 1100 struct ifla_vf_vlan_info vf_vlan_info;
b22b941b
HFS		 1101 struct ifla_vf_spoofchk vf_spoofchk;
1102 struct ifla_vf_tx_rate vf_tx_rate;
1103 struct ifla_vf_stats vf_stats;
1104 struct ifla_vf_trust vf_trust;
1105 struct ifla_vf_vlan vf_vlan;
1106 struct ifla_vf_rate vf_rate;
b22b941b
HFS		 1107 struct ifla_vf_mac vf_mac;
1108 struct ifla_vf_info ivi;
1109
0eed9cf5
MY		 1110 memset(&ivi, 0, sizeof(ivi));
1111
b22b941b
HFS		 1112 /* Not all SR-IOV capable drivers support the
1113 * spoofcheck and "RSS query enable" query. Preset to
1114 * -1 so the user space tool can detect that the driver
1115 * didn't report anything.
1116 */
1117 ivi.spoofchk = -1;
1118 ivi.rss_query_en = -1;
1119 ivi.trusted = -1;
b22b941b
HFS		 1120 /* The default value for VF link state is "auto"
1121 * IFLA_VF_LINK_STATE_AUTO which equals zero
1122 */
1123 ivi.linkstate = 0;
79aab093
MS		 1124 /* VLAN Protocol by default is 802.1Q */
1125 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1126 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1127 return 0;
1128
775f4f05
DC		 1129 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1130
b22b941b
HFS		 1131 vf_mac.vf =
1132 vf_vlan.vf =
79aab093 1133 vf_vlan_info.vf =
b22b941b
HFS		 1134 vf_rate.vf =
1135 vf_tx_rate.vf =
1136 vf_spoofchk.vf =
1137 vf_linkstate.vf =
1138 vf_rss_query_en.vf =
1139 vf_trust.vf = ivi.vf;
1140
1141 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1142 vf_vlan.vlan = ivi.vlan;
1143 vf_vlan.qos = ivi.qos;
79aab093
MS		 1144 vf_vlan_info.vlan = ivi.vlan;
1145 vf_vlan_info.qos = ivi.qos;
1146 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1147 vf_tx_rate.rate = ivi.max_tx_rate;
1148 vf_rate.min_tx_rate = ivi.min_tx_rate;
1149 vf_rate.max_tx_rate = ivi.max_tx_rate;
1150 vf_spoofchk.setting = ivi.spoofchk;
1151 vf_linkstate.link_state = ivi.linkstate;
1152 vf_rss_query_en.setting = ivi.rss_query_en;
1153 vf_trust.setting = ivi.trusted;
1154 vf = nla_nest_start(skb, IFLA_VF_INFO);
79aab093
MS		 1155 if (!vf)
1156 goto nla_put_vfinfo_failure;
b22b941b
HFS		 1157 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1158 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1159 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1160 &vf_rate) ||
1161 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1162 &vf_tx_rate) ||
1163 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1164 &vf_spoofchk) ||
1165 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1166 &vf_linkstate) ||
1167 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1168 sizeof(vf_rss_query_en),
1169 &vf_rss_query_en) ||
1170 nla_put(skb, IFLA_VF_TRUST,
1171 sizeof(vf_trust), &vf_trust))
79aab093
MS		 1172 goto nla_put_vf_failure;
1173 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1174 if (!vfvlanlist)
1175 goto nla_put_vf_failure;
1176 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1177 &vf_vlan_info)) {
1178 nla_nest_cancel(skb, vfvlanlist);
1179 goto nla_put_vf_failure;
1180 }
1181 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1182 memset(&vf_stats, 0, sizeof(vf_stats));
1183 if (dev->netdev_ops->ndo_get_vf_stats)
1184 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1185 &vf_stats);
1186 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
79aab093
MS		 1187 if (!vfstats)
1188 goto nla_put_vf_failure;
343a6d8e
ND		 1189 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1190 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1191 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1192 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1193 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1194 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1195 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1196 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1197 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1198 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1199 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
79aab093
MS		 1200 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1201 nla_nest_cancel(skb, vfstats);
1202 goto nla_put_vf_failure;
1203 }
b22b941b
HFS		 1204 nla_nest_end(skb, vfstats);
1205 nla_nest_end(skb, vf);
1206 return 0;
79aab093
MS		 1207
1208nla_put_vf_failure:
1209 nla_nest_cancel(skb, vf);
1210nla_put_vfinfo_failure:
1211 nla_nest_cancel(skb, vfinfo);
1212 return -EMSGSIZE;
b22b941b
HFS		 1213}
1214
250fc3df
FW		 1215static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1216 struct net_device *dev,
1217 u32 ext_filter_mask)
1218{
1219 struct nlattr *vfinfo;
1220 int i, num_vfs;
1221
1222 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1223 return 0;
1224
1225 num_vfs = dev_num_vf(dev->dev.parent);
1226 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1227 return -EMSGSIZE;
1228
1229 if (!dev->netdev_ops->ndo_get_vf_config)
1230 return 0;
1231
1232 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1233 if (!vfinfo)
1234 return -EMSGSIZE;
1235
1236 for (i = 0; i < num_vfs; i++) {
1237 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1238 return -EMSGSIZE;
1239 }
1240
1241 nla_nest_end(skb, vfinfo);
1242 return 0;
1243}
1244
b22b941b
HFS		 1245static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1246{
5f8e4474
KL		 1247 struct rtnl_link_ifmap map;
1248
1249 memset(&map, 0, sizeof(map));
1250 map.mem_start = dev->mem_start;
1251 map.mem_end = dev->mem_end;
1252 map.base_addr = dev->base_addr;
1253 map.irq = dev->irq;
1254 map.dma = dev->dma;
1255 map.port = dev->if_port;
1256
270cb4d0 1257 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1258 return -EMSGSIZE;
1259
1260 return 0;
1261}
1262
58038695 1263static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id)
d67b9cd2
DB		 1264{
1265 const struct net_device_ops *ops = dev->netdev_ops;
58038695 1266 const struct bpf_prog *generic_xdp_prog;
d67b9cd2
DB		 1267
1268 ASSERT_RTNL();
1269
58038695
MKL		 1270 *prog_id = 0;
1271 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1272 if (generic_xdp_prog) {
1273 *prog_id = generic_xdp_prog->aux->id;
d67b9cd2 1274 return XDP_ATTACHED_SKB;
58038695 1275 }
f4e63525 1276 if (!ops->ndo_bpf)
ce158e58 1277 return XDP_ATTACHED_NONE;
d67b9cd2 1278
f4e63525 1279 return __dev_xdp_attached(dev, ops->ndo_bpf, prog_id);
d67b9cd2
DB		 1280}
1281
d1fdd913
BB		 1282static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1283{
d1fdd913 1284 struct nlattr *xdp;
58038695 1285 u32 prog_id;
d1fdd913
BB		 1286 int err;
1287
d1fdd913
BB		 1288 xdp = nla_nest_start(skb, IFLA_XDP);
1289 if (!xdp)
1290 return -EMSGSIZE;
d67b9cd2
DB		 1291
1292 err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
58038695 1293 rtnl_xdp_attached_mode(dev, &prog_id));
d1fdd913
BB		 1294 if (err)
1295 goto err_cancel;
1296
58038695
MKL		 1297 if (prog_id) {
1298 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1299 if (err)
1300 goto err_cancel;
1301 }
1302
d1fdd913
BB		 1303 nla_nest_end(skb, xdp);
1304 return 0;
1305
1306err_cancel:
1307 nla_nest_cancel(skb, xdp);
1308 return err;
1309}
1310
3d3ea5af
VY		 1311static u32 rtnl_get_event(unsigned long event)
1312{
1313 u32 rtnl_event_type = IFLA_EVENT_NONE;
1314
1315 switch (event) {
1316 case NETDEV_REBOOT:
1317 rtnl_event_type = IFLA_EVENT_REBOOT;
1318 break;
1319 case NETDEV_FEAT_CHANGE:
1320 rtnl_event_type = IFLA_EVENT_FEATURES;
1321 break;
1322 case NETDEV_BONDING_FAILOVER:
1323 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1324 break;
1325 case NETDEV_NOTIFY_PEERS:
1326 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1327 break;
1328 case NETDEV_RESEND_IGMP:
1329 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1330 break;
1331 case NETDEV_CHANGEINFODATA:
1332 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1333 break;
1334 default:
1335 break;
1336 }
1337
1338 return rtnl_event_type;
1339}
1340
79110a04
FW		 1341static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1342{
1343 const struct net_device *upper_dev;
1344 int ret = 0;
1345
1346 rcu_read_lock();
1347
1348 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1349 if (upper_dev)
1350 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1351
1352 rcu_read_unlock();
1353 return ret;
1354}
1355
6c21082e
SD		 1356static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1357 bool force)
79110a04
FW		 1358{
1359 int ifindex = dev_get_iflink(dev);
1360
6c21082e
SD		 1361 if (force || dev->ifindex != ifindex)
1362 return nla_put_u32(skb, IFLA_LINK, ifindex);
79110a04 1363
6c21082e 1364 return 0;
79110a04
FW		 1365}
1366
6c557001
FW		 1367static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1368 struct net_device *dev)
1369{
1370 char buf[IFALIASZ];
1371 int ret;
1372
1373 ret = dev_get_alias(dev, buf, sizeof(buf));
1374 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1375}
1376
b1e66b9a 1377static int rtnl_fill_link_netnsid(struct sk_buff *skb,
79e1ad14 1378 const struct net_device *dev,
bb4a4d49 1379 struct net *src_net, gfp_t gfp)
b1e66b9a 1380{
6c21082e
SD		 1381 bool put_iflink = false;
1382
b1e66b9a
FW		 1383 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1384 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1385
1386 if (!net_eq(dev_net(dev), link_net)) {
bb4a4d49 1387 int id = peernet2id_alloc(src_net, link_net, gfp);
b1e66b9a
FW		 1388
1389 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1390 return -EMSGSIZE;
6c21082e
SD		 1391
1392 put_iflink = true;
b1e66b9a
FW		 1393 }
1394 }
1395
6c21082e 1396 return nla_put_iflink(skb, dev, put_iflink);
b1e66b9a
FW		 1397}
1398
070cbf5b
FW		 1399static int rtnl_fill_link_af(struct sk_buff *skb,
1400 const struct net_device *dev,
1401 u32 ext_filter_mask)
1402{
1403 const struct rtnl_af_ops *af_ops;
1404 struct nlattr *af_spec;
1405
1406 af_spec = nla_nest_start(skb, IFLA_AF_SPEC);
1407 if (!af_spec)
1408 return -EMSGSIZE;
1409
5fa85a09 1410 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
070cbf5b
FW		 1411 struct nlattr *af;
1412 int err;
1413
1414 if (!af_ops->fill_link_af)
1415 continue;
1416
1417 af = nla_nest_start(skb, af_ops->family);
1418 if (!af)
1419 return -EMSGSIZE;
1420
1421 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1422 /*
1423 * Caller may return ENODATA to indicate that there
1424 * was no data to be dumped. This is not an error, it
1425 * means we should trim the attribute header and
1426 * continue.
1427 */
1428 if (err == -ENODATA)
1429 nla_nest_cancel(skb, af);
1430 else if (err < 0)
1431 return -EMSGSIZE;
1432
1433 nla_nest_end(skb, af);
1434 }
1435
1436 nla_nest_end(skb, af_spec);
1437 return 0;
1438}
1439
79e1ad14
JB		 1440static int rtnl_fill_ifinfo(struct sk_buff *skb,
1441 struct net_device *dev, struct net *src_net,
575c3e2a 1442 int type, u32 pid, u32 seq, u32 change,
3d3ea5af 1443 unsigned int flags, u32 ext_filter_mask,
2177db43 1444 u32 event, int *new_nsid, int new_ifindex,
bb4a4d49 1445 int tgt_netnsid, gfp_t gfp)
b60c5115
TG		 1446{
1447 struct ifinfomsg *ifm;
1448 struct nlmsghdr *nlh;
1da177e4 1449
2907c35f 1450 ASSERT_RTNL();
b60c5115
TG		 1451 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1452 if (nlh == NULL)
26932566 1453 return -EMSGSIZE;
1da177e4 1454
b60c5115
TG		 1455 ifm = nlmsg_data(nlh);
1456 ifm->ifi_family = AF_UNSPEC;
1457 ifm->__ifi_pad = 0;
1458 ifm->ifi_type = dev->type;
1459 ifm->ifi_index = dev->ifindex;
1460 ifm->ifi_flags = dev_get_flags(dev);
1461 ifm->ifi_change = change;
1462
79e1ad14
JB		 1463 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_IF_NETNSID, tgt_netnsid))
1464 goto nla_put_failure;
1465
a6574349
DM		 1466 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1467 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1468 nla_put_u8(skb, IFLA_OPERSTATE,
1469 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1470 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1471 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1472 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1473 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1474 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1475 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1476 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1477#ifdef CONFIG_RPS
76ff5cc9 1478 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1479#endif
79110a04 1480 put_master_ifindex(skb, dev) ||
9a57247f 1481 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1482 (dev->qdisc &&
1483 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
6c557001 1484 nla_put_ifalias(skb, dev) ||
2d3b479d 1485 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
5e7f6597
DD		 1486 atomic_read(&dev->carrier_up_count) +
1487 atomic_read(&dev->carrier_down_count)) ||
1488 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) ||
1489 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1490 atomic_read(&dev->carrier_up_count)) ||
1491 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1492 atomic_read(&dev->carrier_down_count)))
a6574349 1493 goto nla_put_failure;
0b815a1a 1494
3d3ea5af
VY		 1495 if (event != IFLA_EVENT_NONE) {
1496 if (nla_put_u32(skb, IFLA_EVENT, event))
1497 goto nla_put_failure;
1498 }
1499
b22b941b
HFS		 1500 if (rtnl_fill_link_ifmap(skb, dev))
1501 goto nla_put_failure;
1da177e4
LT		 1502
1503 if (dev->addr_len) {
a6574349
DM		 1504 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1505 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1506 goto nla_put_failure;
1da177e4
LT		 1507 }
1508
66cae9ed
JP		 1509 if (rtnl_phys_port_id_fill(skb, dev))
1510 goto nla_put_failure;
1511
db24a904
DA		 1512 if (rtnl_phys_port_name_fill(skb, dev))
1513 goto nla_put_failure;
1514
82f28412
JP		 1515 if (rtnl_phys_switch_id_fill(skb, dev))
1516 goto nla_put_failure;
1517
b22b941b 1518 if (rtnl_fill_stats(skb, dev))
10708f37 1519 goto nla_put_failure;
10708f37 1520
250fc3df 1521 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
a6574349 1522 goto nla_put_failure;
57b61080 1523
c53864fd 1524 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1525 goto nla_put_failure;
1526
d1fdd913
BB		 1527 if (rtnl_xdp_fill(skb, dev))
1528 goto nla_put_failure;
1529
ba7d49b1 1530 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1531 if (rtnl_link_fill(skb, dev) < 0)
1532 goto nla_put_failure;
1533 }
1534
bb4a4d49 1535 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
b1e66b9a 1536 goto nla_put_failure;
d37512a2 1537
6621dd29
ND		 1538 if (new_nsid &&
1539 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1540 goto nla_put_failure;
2177db43
ND		 1541 if (new_ifindex &&
1542 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1543 goto nla_put_failure;
1544
6621dd29 1545
5fa85a09 1546 rcu_read_lock();
070cbf5b 1547 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
5fa85a09
FW		 1548 goto nla_put_failure_rcu;
1549 rcu_read_unlock();
f8ff182c 1550
053c095a
JB		 1551 nlmsg_end(skb, nlh);
1552 return 0;
b60c5115 1553
5fa85a09
FW		 1554nla_put_failure_rcu:
1555 rcu_read_unlock();
b60c5115 1556nla_put_failure:
26932566
PM		 1557 nlmsg_cancel(skb, nlh);
1558 return -EMSGSIZE;
1da177e4
LT		 1559}
1560
f7b12606 1561static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1562 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1563 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1564 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1565 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1566 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1567 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1568 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1569 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1570 [IFLA_TXQLEN] = { .type = NLA_U32 },
1571 [IFLA_WEIGHT] = { .type = NLA_U32 },
1572 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1573 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1574 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1575 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1576 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
2459b4c6
ND		 1577 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1578 * allow 0-length string (needed to remove an alias).
1579 */
1580 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
c02db8c6 1581 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1582 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1583 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1584 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1585 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1586 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1587 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1588 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1589 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1590 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1591 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1592 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1593 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1594 [IFLA_XDP] = { .type = NLA_NESTED },
3d3ea5af 1595 [IFLA_EVENT] = { .type = NLA_U32 },
db833d40 1596 [IFLA_GROUP] = { .type = NLA_U32 },
79e1ad14 1597 [IFLA_IF_NETNSID] = { .type = NLA_S32 },
5e7f6597
DD		 1598 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1599 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
da5e0494
TG		 1600};
1601
38f7b870
PM		 1602static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1603 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1604 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1605 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1606 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1607};
1608
c02db8c6 1609static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1610 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1611 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1612 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1613 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1614 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1615 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1616 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1617 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1618 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1619 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1620 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1621 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1622};
1623
57b61080
SF		 1624static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1625 [IFLA_PORT_VF] = { .type = NLA_U32 },
1626 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1627 .len = PORT_PROFILE_MAX },
57b61080
SF		 1628 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1629 .len = PORT_UUID_MAX },
1630 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1631 .len = PORT_UUID_MAX },
1632 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1633 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 1634
1635 /* Unused, but we need to keep it here since user space could
1636 * fill it. It's also broken with regard to NLA_BINARY use in
1637 * combination with structs.
1638 */
1639 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1640 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 1641};
1642
d1fdd913
BB		 1643static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1644 [IFLA_XDP_FD] = { .type = NLA_S32 },
1645 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 1646 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
58038695 1647 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
d1fdd913
BB		 1648};
1649
dc599f76
DA		 1650static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1651{
1652 const struct rtnl_link_ops *ops = NULL;
1653 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1654
fceb6435
JB		 1655 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1656 ifla_info_policy, NULL) < 0)
dc599f76
DA		 1657 return NULL;
1658
1659 if (linfo[IFLA_INFO_KIND]) {
1660 char kind[MODULE_NAME_LEN];
1661
1662 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1663 ops = rtnl_link_ops_get(kind);
1664 }
1665
1666 return ops;
1667}
1668
1669static bool link_master_filtered(struct net_device *dev, int master_idx)
1670{
1671 struct net_device *master;
1672
1673 if (!master_idx)
1674 return false;
1675
1676 master = netdev_master_upper_dev_get(dev);
1677 if (!master || master->ifindex != master_idx)
1678 return true;
1679
1680 return false;
1681}
1682
1683static bool link_kind_filtered(const struct net_device *dev,
1684 const struct rtnl_link_ops *kind_ops)
1685{
1686 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1687 return true;
1688
1689 return false;
1690}
1691
1692static bool link_dump_filtered(struct net_device *dev,
1693 int master_idx,
1694 const struct rtnl_link_ops *kind_ops)
1695{
1696 if (link_master_filtered(dev, master_idx) ||
1697 link_kind_filtered(dev, kind_ops))
1698 return true;
1699
1700 return false;
1701}
1702
f428fe4a 1703static struct net *get_target_net(struct sock *sk, int netnsid)
79e1ad14
JB		 1704{
1705 struct net *net;
1706
f428fe4a 1707 net = get_net_ns_by_id(sock_net(sk), netnsid);
79e1ad14
JB		 1708 if (!net)
1709 return ERR_PTR(-EINVAL);
1710
1711 /* For now, the caller is required to have CAP_NET_ADMIN in
1712 * the user namespace owning the target net ns.
1713 */
f428fe4a 1714 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
79e1ad14
JB		 1715 put_net(net);
1716 return ERR_PTR(-EACCES);
1717 }
1718 return net;
1719}
1720
f7b12606
JP		 1721static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1722{
1723 struct net *net = sock_net(skb->sk);
79e1ad14 1724 struct net *tgt_net = net;
f7b12606
JP		 1725 int h, s_h;
1726 int idx = 0, s_idx;
1727 struct net_device *dev;
1728 struct hlist_head *head;
1729 struct nlattr *tb[IFLA_MAX+1];
1730 u32 ext_filter_mask = 0;
dc599f76
DA		 1731 const struct rtnl_link_ops *kind_ops = NULL;
1732 unsigned int flags = NLM_F_MULTI;
1733 int master_idx = 0;
79e1ad14 1734 int netnsid = -1;
973462bb 1735 int err;
e5eca6d4 1736 int hdrlen;
f7b12606
JP		 1737
1738 s_h = cb->args[0];
1739 s_idx = cb->args[1];
1740
e5eca6d4
MS		 1741 /* A hack to preserve kernel<->userspace interface.
1742 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1743 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1744 * what iproute2 < v3.9.0 used.
1745 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1746 * attribute, its netlink message is shorter than struct ifinfomsg.
1747 */
1748 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1749 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1750
fceb6435
JB		 1751 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1752 ifla_policy, NULL) >= 0) {
79e1ad14
JB		 1753 if (tb[IFLA_IF_NETNSID]) {
1754 netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
f428fe4a 1755 tgt_net = get_target_net(skb->sk, netnsid);
215f5a5b
DA		 1756 if (IS_ERR(tgt_net))
1757 return PTR_ERR(tgt_net);
79e1ad14
JB		 1758 }
1759
f7b12606
JP		 1760 if (tb[IFLA_EXT_MASK])
1761 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1762
1763 if (tb[IFLA_MASTER])
1764 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1765
1766 if (tb[IFLA_LINKINFO])
1767 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1768
1769 if (master_idx || kind_ops)
1770 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1771 }
1772
1773 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1774 idx = 0;
79e1ad14 1775 head = &tgt_net->dev_index_head[h];
cac5e65e 1776 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 1777 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 1778 goto cont;
f7b12606
JP		 1779 if (idx < s_idx)
1780 goto cont;
79e1ad14
JB		 1781 err = rtnl_fill_ifinfo(skb, dev, net,
1782 RTM_NEWLINK,
973462bb
DG		 1783 NETLINK_CB(cb->skb).portid,
1784 cb->nlh->nlmsg_seq, 0,
dc599f76 1785 flags,
2177db43 1786 ext_filter_mask, 0, NULL, 0,
bb4a4d49 1787 netnsid, GFP_KERNEL);
973462bb 1788
f6c5775f
DA		 1789 if (err < 0) {
1790 if (likely(skb->len))
1791 goto out;
1792
1793 goto out_err;
1794 }
f7b12606
JP		 1795cont:
1796 idx++;
1797 }
1798 }
1799out:
f6c5775f
DA		 1800 err = skb->len;
1801out_err:
f7b12606
JP		 1802 cb->args[1] = idx;
1803 cb->args[0] = h;
d0225784
JS		 1804 cb->seq = net->dev_base_seq;
1805 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
79e1ad14
JB		 1806 if (netnsid >= 0)
1807 put_net(tgt_net);
f7b12606 1808
f6c5775f 1809 return err;
f7b12606
JP		 1810}
1811
fceb6435
JB		 1812int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1813 struct netlink_ext_ack *exterr)
f7b12606 1814{
fceb6435 1815 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
f7b12606
JP		 1816}
1817EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1818
81adee47
EB		 1819struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1820{
1821 struct net *net;
1822 /* Examine the link attributes and figure out which
1823 * network namespace we are talking about.
1824 */
1825 if (tb[IFLA_NET_NS_PID])
1826 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1827 else if (tb[IFLA_NET_NS_FD])
1828 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1829 else
1830 net = get_net(src_net);
1831 return net;
1832}
1833EXPORT_SYMBOL(rtnl_link_get_net);
1834
cc2fbdc7
CB		 1835/* Figure out which network namespace we are talking about by
1836 * examining the link attributes in the following order:
1837 *
1838 * 1. IFLA_NET_NS_PID
1839 * 2. IFLA_NET_NS_FD
1840 * 3. IFLA_IF_NETNSID
1841 */
1842static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
1843 struct nlattr *tb[])
1844{
1845 struct net *net;
1846
1847 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
1848 return rtnl_link_get_net(src_net, tb);
1849
1850 if (!tb[IFLA_IF_NETNSID])
1851 return get_net(src_net);
1852
1853 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_IF_NETNSID]));
1854 if (!net)
1855 return ERR_PTR(-EINVAL);
1856
1857 return net;
1858}
1859
1860static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
1861 struct net *src_net,
1862 struct nlattr *tb[], int cap)
1863{
1864 struct net *net;
1865
1866 net = rtnl_link_get_net_by_nlattr(src_net, tb);
1867 if (IS_ERR(net))
1868 return net;
1869
1870 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
1871 put_net(net);
1872 return ERR_PTR(-EPERM);
1873 }
1874
1875 return net;
1876}
1877
a5a1a12d
CB		 1878/* Verify that rtnetlink requests do not pass additional properties
1879 * potentially referring to different network namespaces.
1880 */
1881static int rtnl_ensure_unique_netns(struct nlattr *tb[],
1882 struct netlink_ext_ack *extack,
1883 bool netns_id_only)
1884{
1885
1886 if (netns_id_only) {
1887 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
1888 return 0;
1889
1890 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
1891 return -EOPNOTSUPP;
1892 }
1893
1894 if (tb[IFLA_IF_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
1895 goto invalid_attr;
1896
1897 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_IF_NETNSID] || tb[IFLA_NET_NS_FD]))
1898 goto invalid_attr;
1899
1900 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_IF_NETNSID] || tb[IFLA_NET_NS_PID]))
1901 goto invalid_attr;
1902
1903 return 0;
1904
1905invalid_attr:
1906 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
1907 return -EINVAL;
1908}
1909
1840bb13
TG		 1910static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1911{
1912 if (dev) {
1913 if (tb[IFLA_ADDRESS] &&
1914 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1915 return -EINVAL;
1916
1917 if (tb[IFLA_BROADCAST] &&
1918 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1919 return -EINVAL;
1920 }
1921
cf7afbfe
TG		 1922 if (tb[IFLA_AF_SPEC]) {
1923 struct nlattr *af;
1924 int rem, err;
1925
1926 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1927 const struct rtnl_af_ops *af_ops;
1928
5fa85a09
FW		 1929 rcu_read_lock();
1930 af_ops = rtnl_af_lookup(nla_type(af));
1931 if (!af_ops) {
1932 rcu_read_unlock();
cf7afbfe 1933 return -EAFNOSUPPORT;
5fa85a09 1934 }
cf7afbfe 1935
5fa85a09
FW		 1936 if (!af_ops->set_link_af) {
1937 rcu_read_unlock();
cf7afbfe 1938 return -EOPNOTSUPP;
5fa85a09 1939 }
cf7afbfe
TG		 1940
1941 if (af_ops->validate_link_af) {
6d3a9a68 1942 err = af_ops->validate_link_af(dev, af);
5fa85a09
FW		 1943 if (err < 0) {
1944 rcu_read_unlock();
cf7afbfe 1945 return err;
5fa85a09 1946 }
cf7afbfe 1947 }
5fa85a09
FW		 1948
1949 rcu_read_unlock();
cf7afbfe
TG		 1950 }
1951 }
1952
1840bb13
TG		 1953 return 0;
1954}
1955
cc8e27cc
EC		 1956static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1957 int guid_type)
1958{
1959 const struct net_device_ops *ops = dev->netdev_ops;
1960
1961 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1962}
1963
1964static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1965{
1966 if (dev->type != ARPHRD_INFINIBAND)
1967 return -EOPNOTSUPP;
1968
1969 return handle_infiniband_guid(dev, ivt, guid_type);
1970}
1971
4f7d2cdf 1972static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1973{
c02db8c6 1974 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1975 int err = -EINVAL;
c02db8c6 1976
4f7d2cdf
DB		 1977 if (tb[IFLA_VF_MAC]) {
1978 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1979
1b303569
DC		 1980 if (ivm->vf >= INT_MAX)
1981 return -EINVAL;
4f7d2cdf
DB		 1982 err = -EOPNOTSUPP;
1983 if (ops->ndo_set_vf_mac)
1984 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1985 ivm->mac);
1986 if (err < 0)
1987 return err;
1988 }
1989
1990 if (tb[IFLA_VF_VLAN]) {
1991 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1992
1b303569
DC		 1993 if (ivv->vf >= INT_MAX)
1994 return -EINVAL;
4f7d2cdf
DB		 1995 err = -EOPNOTSUPP;
1996 if (ops->ndo_set_vf_vlan)
1997 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 1998 ivv->qos,
1999 htons(ETH_P_8021Q));
2000 if (err < 0)
2001 return err;
2002 }
2003
2004 if (tb[IFLA_VF_VLAN_LIST]) {
2005 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2006 struct nlattr *attr;
2007 int rem, len = 0;
2008
2009 err = -EOPNOTSUPP;
2010 if (!ops->ndo_set_vf_vlan)
2011 return err;
2012
2013 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2014 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2015 nla_len(attr) < NLA_HDRLEN) {
2016 return -EINVAL;
2017 }
2018 if (len >= MAX_VLAN_LIST_LEN)
2019 return -EOPNOTSUPP;
2020 ivvl[len] = nla_data(attr);
2021
2022 len++;
2023 }
fa34cd94
AB		 2024 if (len == 0)
2025 return -EINVAL;
2026
1b303569
DC		 2027 if (ivvl[0]->vf >= INT_MAX)
2028 return -EINVAL;
79aab093
MS		 2029 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2030 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 2031 if (err < 0)
2032 return err;
c02db8c6 2033 }
4f7d2cdf
DB		 2034
2035 if (tb[IFLA_VF_TX_RATE]) {
2036 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2037 struct ifla_vf_info ivf;
2038
1b303569
DC		 2039 if (ivt->vf >= INT_MAX)
2040 return -EINVAL;
4f7d2cdf
DB		 2041 err = -EOPNOTSUPP;
2042 if (ops->ndo_get_vf_config)
2043 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2044 if (err < 0)
2045 return err;
2046
2047 err = -EOPNOTSUPP;
2048 if (ops->ndo_set_vf_rate)
2049 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2050 ivf.min_tx_rate,
2051 ivt->rate);
2052 if (err < 0)
2053 return err;
2054 }
2055
2056 if (tb[IFLA_VF_RATE]) {
2057 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2058
1b303569
DC		 2059 if (ivt->vf >= INT_MAX)
2060 return -EINVAL;
4f7d2cdf
DB		 2061 err = -EOPNOTSUPP;
2062 if (ops->ndo_set_vf_rate)
2063 err = ops->ndo_set_vf_rate(dev, ivt->vf,
2064 ivt->min_tx_rate,
2065 ivt->max_tx_rate);
2066 if (err < 0)
2067 return err;
2068 }
2069
2070 if (tb[IFLA_VF_SPOOFCHK]) {
2071 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2072
1b303569
DC		 2073 if (ivs->vf >= INT_MAX)
2074 return -EINVAL;
4f7d2cdf
DB		 2075 err = -EOPNOTSUPP;
2076 if (ops->ndo_set_vf_spoofchk)
2077 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2078 ivs->setting);
2079 if (err < 0)
2080 return err;
2081 }
2082
2083 if (tb[IFLA_VF_LINK_STATE]) {
2084 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2085
1b303569
DC		 2086 if (ivl->vf >= INT_MAX)
2087 return -EINVAL;
4f7d2cdf
DB		 2088 err = -EOPNOTSUPP;
2089 if (ops->ndo_set_vf_link_state)
2090 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2091 ivl->link_state);
2092 if (err < 0)
2093 return err;
2094 }
2095
2096 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2097 struct ifla_vf_rss_query_en *ivrssq_en;
2098
2099 err = -EOPNOTSUPP;
2100 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1b303569
DC		 2101 if (ivrssq_en->vf >= INT_MAX)
2102 return -EINVAL;
4f7d2cdf
DB		 2103 if (ops->ndo_set_vf_rss_query_en)
2104 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2105 ivrssq_en->setting);
2106 if (err < 0)
2107 return err;
2108 }
2109
dd461d6a
HS		 2110 if (tb[IFLA_VF_TRUST]) {
2111 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2112
1b303569
DC		 2113 if (ivt->vf >= INT_MAX)
2114 return -EINVAL;
dd461d6a
HS		 2115 err = -EOPNOTSUPP;
2116 if (ops->ndo_set_vf_trust)
2117 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2118 if (err < 0)
2119 return err;
2120 }
2121
cc8e27cc
EC		 2122 if (tb[IFLA_VF_IB_NODE_GUID]) {
2123 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2124
1b303569
DC		 2125 if (ivt->vf >= INT_MAX)
2126 return -EINVAL;
cc8e27cc
EC		 2127 if (!ops->ndo_set_vf_guid)
2128 return -EOPNOTSUPP;
cc8e27cc
EC		 2129 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2130 }
2131
2132 if (tb[IFLA_VF_IB_PORT_GUID]) {
2133 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2134
1b303569
DC		 2135 if (ivt->vf >= INT_MAX)
2136 return -EINVAL;
cc8e27cc
EC		 2137 if (!ops->ndo_set_vf_guid)
2138 return -EOPNOTSUPP;
2139
2140 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2141 }
2142
c02db8c6
CW		 2143 return err;
2144}
2145
33eaf2a6
DA		 2146static int do_set_master(struct net_device *dev, int ifindex,
2147 struct netlink_ext_ack *extack)
fbaec0ea 2148{
898e5061 2149 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 2150 const struct net_device_ops *ops;
2151 int err;
2152
898e5061
JP		 2153 if (upper_dev) {
2154 if (upper_dev->ifindex == ifindex)
fbaec0ea 2155 return 0;
898e5061 2156 ops = upper_dev->netdev_ops;
fbaec0ea 2157 if (ops->ndo_del_slave) {
898e5061 2158 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 2159 if (err)
2160 return err;
2161 } else {
2162 return -EOPNOTSUPP;
2163 }
2164 }
2165
2166 if (ifindex) {
898e5061
JP		 2167 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2168 if (!upper_dev)
fbaec0ea 2169 return -EINVAL;
898e5061 2170 ops = upper_dev->netdev_ops;
fbaec0ea 2171 if (ops->ndo_add_slave) {
33eaf2a6 2172 err = ops->ndo_add_slave(upper_dev, dev, extack);
fbaec0ea
JP		 2173 if (err)
2174 return err;
2175 } else {
2176 return -EOPNOTSUPP;
2177 }
2178 }
2179 return 0;
2180}
2181
90c325e3 2182#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 2183/* notify flag means notify + modified. */
2184#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 2185static int do_setlink(const struct sk_buff *skb,
2186 struct net_device *dev, struct ifinfomsg *ifm,
ddf9f970 2187 struct netlink_ext_ack *extack,
90c325e3 2188 struct nlattr **tb, char *ifname, int status)
1da177e4 2189{
d314774c 2190 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 2191 int err;
1da177e4 2192
1a915669
ED		 2193 err = validate_linkmsg(dev, tb);
2194 if (err < 0)
2195 return err;
2196
cc2fbdc7
CB		 2197 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_IF_NETNSID]) {
2198 struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2199 tb, CAP_NET_ADMIN);
d8a5ec67
EB		 2200 if (IS_ERR(net)) {
2201 err = PTR_ERR(net);
2202 goto errout;
2203 }
cc2fbdc7 2204
d8a5ec67
EB		 2205 err = dev_change_net_namespace(dev, net, ifname);
2206 put_net(net);
2207 if (err)
2208 goto errout;
90c325e3 2209 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 2210 }
2211
da5e0494 2212 if (tb[IFLA_MAP]) {
1da177e4
LT		 2213 struct rtnl_link_ifmap *u_map;
2214 struct ifmap k_map;
2215
d314774c 2216 if (!ops->ndo_set_config) {
1da177e4 2217 err = -EOPNOTSUPP;
0157f60c 2218 goto errout;
1da177e4
LT		 2219 }
2220
2221 if (!netif_device_present(dev)) {
2222 err = -ENODEV;
0157f60c 2223 goto errout;
1da177e4 2224 }
1da177e4 2225
da5e0494 2226 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 2227 k_map.mem_start = (unsigned long) u_map->mem_start;
2228 k_map.mem_end = (unsigned long) u_map->mem_end;
2229 k_map.base_addr = (unsigned short) u_map->base_addr;
2230 k_map.irq = (unsigned char) u_map->irq;
2231 k_map.dma = (unsigned char) u_map->dma;
2232 k_map.port = (unsigned char) u_map->port;
2233
d314774c 2234 err = ops->ndo_set_config(dev, &k_map);
da5e0494 2235 if (err < 0)
0157f60c 2236 goto errout;
1da177e4 2237
ba998906 2238 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 2239 }
2240
da5e0494 2241 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 2242 struct sockaddr *sa;
2243 int len;
2244
153711f9
WC		 2245 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2246 sizeof(*sa));
70f8e78e
DM		 2247 sa = kmalloc(len, GFP_KERNEL);
2248 if (!sa) {
2249 err = -ENOMEM;
0157f60c 2250 goto errout;
70f8e78e
DM		 2251 }
2252 sa->sa_family = dev->type;
da5e0494 2253 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 2254 dev->addr_len);
e7c3273e 2255 err = dev_set_mac_address(dev, sa);
70f8e78e 2256 kfree(sa);
1da177e4 2257 if (err)
0157f60c 2258 goto errout;
90c325e3 2259 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2260 }
2261
da5e0494
TG		 2262 if (tb[IFLA_MTU]) {
2263 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
2264 if (err < 0)
0157f60c 2265 goto errout;
90c325e3 2266 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2267 }
2268
cbda10fa
VD		 2269 if (tb[IFLA_GROUP]) {
2270 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 2271 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 2272 }
2273
da5e0494
TG		 2274 /*
2275 * Interface selected by interface index but interface
2276 * name provided implies that a name change has been
2277 * requested.
2278 */
51055be8 2279 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2280 err = dev_change_name(dev, ifname);
2281 if (err < 0)
0157f60c 2282 goto errout;
90c325e3 2283 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2284 }
2285
0b815a1a
SH		 2286 if (tb[IFLA_IFALIAS]) {
2287 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2288 nla_len(tb[IFLA_IFALIAS]));
2289 if (err < 0)
2290 goto errout;
ba998906 2291 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2292 }
2293
da5e0494
TG		 2294 if (tb[IFLA_BROADCAST]) {
2295 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2296 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2297 }
2298
83b496e9 2299 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 2300 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 2301 if (err < 0)
2302 goto errout;
83b496e9 2303 }
1da177e4 2304
fbaec0ea 2305 if (tb[IFLA_MASTER]) {
33eaf2a6 2306 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
fbaec0ea
JP		 2307 if (err)
2308 goto errout;
90c325e3 2309 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2310 }
2311
9a57247f
JP		 2312 if (tb[IFLA_CARRIER]) {
2313 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2314 if (err)
2315 goto errout;
90c325e3 2316 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2317 }
2318
5d1180fc 2319 if (tb[IFLA_TXQLEN]) {
0cd29503
AD		 2320 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2321 unsigned int orig_len = dev->tx_queue_len;
08294a26
JW		 2322
2323 if (dev->tx_queue_len ^ value) {
2324 dev->tx_queue_len = value;
2325 err = call_netdevice_notifiers(
2326 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2327 err = notifier_to_errno(err);
2328 if (err) {
2329 dev->tx_queue_len = orig_len;
2330 goto errout;
2331 }
2d7f669b 2332 status |= DO_SETLINK_MODIFIED;
08294a26 2333 }
5d1180fc 2334 }
b00055aa 2335
da5e0494 2336 if (tb[IFLA_OPERSTATE])
93b2d4a2 2337 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2338
da5e0494 2339 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2340 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2341
93b2d4a2 2342 write_lock_bh(&dev_base_lock);
1889b0e7 2343 if (dev->link_mode ^ value)
ba998906 2344 status |= DO_SETLINK_NOTIFY;
1889b0e7 2345 dev->link_mode = value;
93b2d4a2 2346 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 2347 }
2348
c02db8c6 2349 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2350 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2351 struct nlattr *attr;
2352 int rem;
4f7d2cdf 2353
c02db8c6 2354 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2355 if (nla_type(attr) != IFLA_VF_INFO ||
2356 nla_len(attr) < NLA_HDRLEN) {
253683bb 2357 err = -EINVAL;
c02db8c6 2358 goto errout;
253683bb 2359 }
4f7d2cdf 2360 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
fceb6435 2361 ifla_vf_policy, NULL);
4f7d2cdf
DB		 2362 if (err < 0)
2363 goto errout;
2364 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2365 if (err < 0)
2366 goto errout;
ba998906 2367 status |= DO_SETLINK_NOTIFY;
c02db8c6 2368 }
ebc08a6f 2369 }
1da177e4
LT		 2370 err = 0;
2371
57b61080
SF		 2372 if (tb[IFLA_VF_PORTS]) {
2373 struct nlattr *port[IFLA_PORT_MAX+1];
2374 struct nlattr *attr;
2375 int vf;
2376 int rem;
2377
2378 err = -EOPNOTSUPP;
2379 if (!ops->ndo_set_vf_port)
2380 goto errout;
2381
2382 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2383 if (nla_type(attr) != IFLA_VF_PORT ||
2384 nla_len(attr) < NLA_HDRLEN) {
2385 err = -EINVAL;
2386 goto errout;
2387 }
2388 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
fceb6435 2389 ifla_port_policy, NULL);
57b61080
SF		 2390 if (err < 0)
2391 goto errout;
2392 if (!port[IFLA_PORT_VF]) {
2393 err = -EOPNOTSUPP;
2394 goto errout;
2395 }
2396 vf = nla_get_u32(port[IFLA_PORT_VF]);
2397 err = ops->ndo_set_vf_port(dev, vf, port);
2398 if (err < 0)
2399 goto errout;
ba998906 2400 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2401 }
2402 }
2403 err = 0;
2404
2405 if (tb[IFLA_PORT_SELF]) {
2406 struct nlattr *port[IFLA_PORT_MAX+1];
2407
2408 err = nla_parse_nested(port, IFLA_PORT_MAX,
fceb6435
JB		 2409 tb[IFLA_PORT_SELF], ifla_port_policy,
2410 NULL);
57b61080
SF		 2411 if (err < 0)
2412 goto errout;
2413
2414 err = -EOPNOTSUPP;
2415 if (ops->ndo_set_vf_port)
2416 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2417 if (err < 0)
2418 goto errout;
ba998906 2419 status |= DO_SETLINK_NOTIFY;
57b61080 2420 }
f8ff182c
TG		 2421
2422 if (tb[IFLA_AF_SPEC]) {
2423 struct nlattr *af;
2424 int rem;
2425
2426 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2427 const struct rtnl_af_ops *af_ops;
2428
5fa85a09
FW		 2429 rcu_read_lock();
2430
058c8d59 2431 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
f8ff182c 2432
cf7afbfe 2433 err = af_ops->set_link_af(dev, af);
5fa85a09
FW		 2434 if (err < 0) {
2435 rcu_read_unlock();
f8ff182c 2436 goto errout;
5fa85a09 2437 }
f8ff182c 2438
5fa85a09 2439 rcu_read_unlock();
ba998906 2440 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2441 }
2442 }
57b61080
SF		 2443 err = 0;
2444
88d6378b
AK		 2445 if (tb[IFLA_PROTO_DOWN]) {
2446 err = dev_change_proto_down(dev,
2447 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2448 if (err)
2449 goto errout;
2450 status |= DO_SETLINK_NOTIFY;
2451 }
2452
d1fdd913
BB		 2453 if (tb[IFLA_XDP]) {
2454 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 2455 u32 xdp_flags = 0;
d1fdd913
BB		 2456
2457 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
fceb6435 2458 ifla_xdp_policy, NULL);
d1fdd913
BB		 2459 if (err < 0)
2460 goto errout;
2461
58038695 2462 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
262d8625
BB		 2463 err = -EINVAL;
2464 goto errout;
2465 }
85de8576
DB		 2466
2467 if (xdp[IFLA_XDP_FLAGS]) {
2468 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2469 if (xdp_flags & ~XDP_FLAGS_MASK) {
2470 err = -EINVAL;
2471 goto errout;
2472 }
ee5d032f 2473 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
0489df9a
DB		 2474 err = -EINVAL;
2475 goto errout;
2476 }
85de8576
DB		 2477 }
2478
d1fdd913 2479 if (xdp[IFLA_XDP_FD]) {
ddf9f970 2480 err = dev_change_xdp_fd(dev, extack,
85de8576
DB		 2481 nla_get_s32(xdp[IFLA_XDP_FD]),
2482 xdp_flags);
d1fdd913
BB		 2483 if (err)
2484 goto errout;
2485 status |= DO_SETLINK_NOTIFY;
2486 }
2487 }
2488
0157f60c 2489errout:
ba998906 2490 if (status & DO_SETLINK_MODIFIED) {
64ff90cc 2491 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
ba998906
ND		 2492 netdev_state_change(dev);
2493
2494 if (err < 0)
2495 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",
2496 dev->name);
2497 }
da5e0494 2498
0157f60c
PM		 2499 return err;
2500}
1da177e4 2501
c21ef3e3
DA		 2502static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2503 struct netlink_ext_ack *extack)
0157f60c 2504{
3b1e0a65 2505 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2506 struct ifinfomsg *ifm;
2507 struct net_device *dev;
2508 int err;
2509 struct nlattr *tb[IFLA_MAX+1];
2510 char ifname[IFNAMSIZ];
2511
c21ef3e3
DA		 2512 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2513 extack);
0157f60c
PM		 2514 if (err < 0)
2515 goto errout;
2516
a5a1a12d
CB		 2517 err = rtnl_ensure_unique_netns(tb, extack, false);
2518 if (err < 0)
2519 goto errout;
2520
0157f60c
PM		 2521 if (tb[IFLA_IFNAME])
2522 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2523 else
2524 ifname[0] = '\0';
2525
2526 err = -EINVAL;
2527 ifm = nlmsg_data(nlh);
2528 if (ifm->ifi_index > 0)
a3d12891 2529 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2530 else if (tb[IFLA_IFNAME])
a3d12891 2531 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2532 else
2533 goto errout;
2534
2535 if (dev == NULL) {
2536 err = -ENODEV;
2537 goto errout;
2538 }
2539
ddf9f970 2540 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
da5e0494 2541errout:
1da177e4
LT		 2542 return err;
2543}
2544
66400d54
WC		 2545static int rtnl_group_dellink(const struct net *net, int group)
2546{
2547 struct net_device *dev, *aux;
2548 LIST_HEAD(list_kill);
2549 bool found = false;
2550
2551 if (!group)
2552 return -EPERM;
2553
2554 for_each_netdev(net, dev) {
2555 if (dev->group == group) {
2556 const struct rtnl_link_ops *ops;
2557
2558 found = true;
2559 ops = dev->rtnl_link_ops;
2560 if (!ops || !ops->dellink)
2561 return -EOPNOTSUPP;
2562 }
2563 }
2564
2565 if (!found)
2566 return -ENODEV;
2567
2568 for_each_netdev_safe(net, dev, aux) {
2569 if (dev->group == group) {
2570 const struct rtnl_link_ops *ops;
2571
2572 ops = dev->rtnl_link_ops;
2573 ops->dellink(dev, &list_kill);
2574 }
2575 }
2576 unregister_netdevice_many(&list_kill);
2577
2578 return 0;
2579}
2580
614732ea
TG		 2581int rtnl_delete_link(struct net_device *dev)
2582{
2583 const struct rtnl_link_ops *ops;
2584 LIST_HEAD(list_kill);
2585
2586 ops = dev->rtnl_link_ops;
2587 if (!ops || !ops->dellink)
2588 return -EOPNOTSUPP;
2589
2590 ops->dellink(dev, &list_kill);
2591 unregister_netdevice_many(&list_kill);
2592
2593 return 0;
2594}
2595EXPORT_SYMBOL_GPL(rtnl_delete_link);
2596
c21ef3e3
DA		 2597static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2598 struct netlink_ext_ack *extack)
38f7b870 2599{
3b1e0a65 2600 struct net *net = sock_net(skb->sk);
d238af80
CB		 2601 struct net *tgt_net = net;
2602 struct net_device *dev = NULL;
38f7b870
PM		 2603 struct ifinfomsg *ifm;
2604 char ifname[IFNAMSIZ];
2605 struct nlattr *tb[IFLA_MAX+1];
2606 int err;
d238af80 2607 int netnsid = -1;
38f7b870 2608
c21ef3e3 2609 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2610 if (err < 0)
2611 return err;
2612
a5a1a12d
CB		 2613 err = rtnl_ensure_unique_netns(tb, extack, true);
2614 if (err < 0)
2615 return err;
2616
38f7b870
PM		 2617 if (tb[IFLA_IFNAME])
2618 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2619
d238af80
CB		 2620 if (tb[IFLA_IF_NETNSID]) {
2621 netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
2622 tgt_net = get_target_net(NETLINK_CB(skb).sk, netnsid);
2623 if (IS_ERR(tgt_net))
2624 return PTR_ERR(tgt_net);
2625 }
2626
2627 err = -EINVAL;
38f7b870
PM		 2628 ifm = nlmsg_data(nlh);
2629 if (ifm->ifi_index > 0)
d238af80 2630 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
38f7b870 2631 else if (tb[IFLA_IFNAME])
d238af80 2632 dev = __dev_get_by_name(tgt_net, ifname);
66400d54 2633 else if (tb[IFLA_GROUP])
d238af80 2634 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870 2635 else
d238af80 2636 goto out;
38f7b870 2637
d238af80
CB		 2638 if (!dev) {
2639 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
2640 err = -ENODEV;
2641
2642 goto out;
2643 }
2644
2645 err = rtnl_delete_link(dev);
38f7b870 2646
d238af80
CB		 2647out:
2648 if (netnsid >= 0)
2649 put_net(tgt_net);
2650
2651 return err;
38f7b870
PM		 2652}
2653
3729d502
PM		 2654int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2655{
2656 unsigned int old_flags;
2657 int err;
2658
2659 old_flags = dev->flags;
2660 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2661 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2662 if (err < 0)
2663 return err;
2664 }
2665
3a95050d 2666 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
bc108d95 2667 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
3a95050d
RP		 2668 } else {
2669 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
2670 __dev_notify_flags(dev, old_flags, ~0U);
2671 }
3729d502
PM		 2672 return 0;
2673}
2674EXPORT_SYMBOL(rtnl_configure_link);
2675
c0713563 2676struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2677 const char *ifname, unsigned char name_assign_type,
5517750f 2678 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288 2679{
e7199288 2680 struct net_device *dev;
d40156aa
JP		 2681 unsigned int num_tx_queues = 1;
2682 unsigned int num_rx_queues = 1;
e7199288 2683
76ff5cc9
JP		 2684 if (tb[IFLA_NUM_TX_QUEUES])
2685 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2686 else if (ops->get_num_tx_queues)
d40156aa 2687 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2688
2689 if (tb[IFLA_NUM_RX_QUEUES])
2690 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2691 else if (ops->get_num_rx_queues)
d40156aa 2692 num_rx_queues = ops->get_num_rx_queues();
efacb309 2693
f939fd75
ED		 2694 if (num_tx_queues < 1 || num_tx_queues > 4096)
2695 return ERR_PTR(-EINVAL);
2696
2697 if (num_rx_queues < 1 || num_rx_queues > 4096)
2698 return ERR_PTR(-EINVAL);
2699
5517750f 2700 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2701 ops->setup, num_tx_queues, num_rx_queues);
e7199288 2702 if (!dev)
d1892e4e 2703 return ERR_PTR(-ENOMEM);
e7199288 2704
81adee47
EB		 2705 dev_net_set(dev, net);
2706 dev->rtnl_link_ops = ops;
3729d502 2707 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2708
19cdeabd
ED		 2709 if (tb[IFLA_MTU]) {
2710 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
2711 int err;
2712
2713 err = dev_validate_mtu(dev, mtu);
2714 if (err) {
2715 free_netdev(dev);
2716 return ERR_PTR(err);
2717 }
2718 dev->mtu = mtu;
2719 }
2afb9b53 2720 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2721 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2722 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2723 dev->addr_assign_type = NET_ADDR_SET;
2724 }
e7199288
PE		 2725 if (tb[IFLA_BROADCAST])
2726 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2727 nla_len(tb[IFLA_BROADCAST]));
2728 if (tb[IFLA_TXQLEN])
2729 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2730 if (tb[IFLA_OPERSTATE])
93b2d4a2 2731 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2732 if (tb[IFLA_LINKMODE])
2733 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2734 if (tb[IFLA_GROUP])
2735 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2736
2737 return dev;
e7199288 2738}
e0d087af 2739EXPORT_SYMBOL(rtnl_create_link);
e7199288 2740
90f62cf3
EB		 2741static int rtnl_group_changelink(const struct sk_buff *skb,
2742 struct net *net, int group,
e7ed828f 2743 struct ifinfomsg *ifm,
ddf9f970 2744 struct netlink_ext_ack *extack,
e7ed828f
VD		 2745 struct nlattr **tb)
2746{
d079535d 2747 struct net_device *dev, *aux;
e7ed828f
VD		 2748 int err;
2749
d079535d 2750 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2751 if (dev->group == group) {
ddf9f970 2752 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
e7ed828f
VD		 2753 if (err < 0)
2754 return err;
2755 }
2756 }
2757
2758 return 0;
2759}
2760
c21ef3e3
DA		 2761static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2762 struct netlink_ext_ack *extack)
38f7b870 2763{
3b1e0a65 2764 struct net *net = sock_net(skb->sk);
38f7b870 2765 const struct rtnl_link_ops *ops;
ba7d49b1 2766 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2767 struct net_device *dev;
ba7d49b1 2768 struct net_device *master_dev = NULL;
38f7b870
PM		 2769 struct ifinfomsg *ifm;
2770 char kind[MODULE_NAME_LEN];
2771 char ifname[IFNAMSIZ];
2772 struct nlattr *tb[IFLA_MAX+1];
2773 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2774 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2775 int err;
2776
95a5afca 2777#ifdef CONFIG_MODULES
38f7b870 2778replay:
8072f085 2779#endif
c21ef3e3 2780 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2781 if (err < 0)
2782 return err;
2783
a5a1a12d
CB		 2784 err = rtnl_ensure_unique_netns(tb, extack, false);
2785 if (err < 0)
2786 return err;
2787
38f7b870
PM		 2788 if (tb[IFLA_IFNAME])
2789 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2790 else
2791 ifname[0] = '\0';
2792
2793 ifm = nlmsg_data(nlh);
2794 if (ifm->ifi_index > 0)
881d966b 2795 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2796 else {
2797 if (ifname[0])
2798 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2799 else
2800 dev = NULL;
2801 }
38f7b870 2802
ba7d49b1
JP		 2803 if (dev) {
2804 master_dev = netdev_master_upper_dev_get(dev);
2805 if (master_dev)
2806 m_ops = master_dev->rtnl_link_ops;
2807 }
2808
e0d087af
ED		 2809 err = validate_linkmsg(dev, tb);
2810 if (err < 0)
1840bb13
TG		 2811 return err;
2812
38f7b870
PM		 2813 if (tb[IFLA_LINKINFO]) {
2814 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
fceb6435
JB		 2815 tb[IFLA_LINKINFO], ifla_info_policy,
2816 NULL);
38f7b870
PM		 2817 if (err < 0)
2818 return err;
2819 } else
2820 memset(linkinfo, 0, sizeof(linkinfo));
2821
2822 if (linkinfo[IFLA_INFO_KIND]) {
2823 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2824 ops = rtnl_link_ops_get(kind);
2825 } else {
2826 kind[0] = '\0';
2827 ops = NULL;
2828 }
2829
2830 if (1) {
4e10fd5b
SL		 2831 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2832 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2833 struct nlattr **data = NULL;
2834 struct nlattr **slave_data = NULL;
317f4810 2835 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2836
2837 if (ops) {
2838 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2839 err = nla_parse_nested(attr, ops->maxtype,
2840 linkinfo[IFLA_INFO_DATA],
fceb6435 2841 ops->policy, NULL);
38f7b870
PM		 2842 if (err < 0)
2843 return err;
2844 data = attr;
2845 }
2846 if (ops->validate) {
a8b8a889 2847 err = ops->validate(tb, data, extack);
38f7b870
PM		 2848 if (err < 0)
2849 return err;
2850 }
2851 }
2852
ba7d49b1
JP		 2853 if (m_ops) {
2854 if (m_ops->slave_maxtype &&
2855 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2856 err = nla_parse_nested(slave_attr,
2857 m_ops->slave_maxtype,
2858 linkinfo[IFLA_INFO_SLAVE_DATA],
fceb6435
JB		 2859 m_ops->slave_policy,
2860 NULL);
ba7d49b1
JP		 2861 if (err < 0)
2862 return err;
2863 slave_data = slave_attr;
2864 }
ba7d49b1
JP		 2865 }
2866
38f7b870 2867 if (dev) {
90c325e3 2868 int status = 0;
38f7b870
PM		 2869
2870 if (nlh->nlmsg_flags & NLM_F_EXCL)
2871 return -EEXIST;
2872 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2873 return -EOPNOTSUPP;
2874
2875 if (linkinfo[IFLA_INFO_DATA]) {
2876 if (!ops || ops != dev->rtnl_link_ops ||
2877 !ops->changelink)
2878 return -EOPNOTSUPP;
2879
ad744b22 2880 err = ops->changelink(dev, tb, data, extack);
38f7b870
PM		 2881 if (err < 0)
2882 return err;
ba998906 2883 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2884 }
2885
ba7d49b1
JP		 2886 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2887 if (!m_ops || !m_ops->slave_changelink)
2888 return -EOPNOTSUPP;
2889
2890 err = m_ops->slave_changelink(master_dev, dev,
17dd0ec4
MS		 2891 tb, slave_data,
2892 extack);
ba7d49b1
JP		 2893 if (err < 0)
2894 return err;
ba998906 2895 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2896 }
2897
ddf9f970
JK		 2898 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2899 status);
38f7b870
PM		 2900 }
2901
ffa934f1
PM		 2902 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2903 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2904 return rtnl_group_changelink(skb, net,
ffa934f1 2905 nla_get_u32(tb[IFLA_GROUP]),
ddf9f970 2906 ifm, extack, tb);
38f7b870 2907 return -ENODEV;
ffa934f1 2908 }
38f7b870 2909
160ca014 2910 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
38f7b870
PM		 2911 return -EOPNOTSUPP;
2912
2913 if (!ops) {
95a5afca 2914#ifdef CONFIG_MODULES
38f7b870
PM		 2915 if (kind[0]) {
2916 __rtnl_unlock();
2917 request_module("rtnl-link-%s", kind);
2918 rtnl_lock();
2919 ops = rtnl_link_ops_get(kind);
2920 if (ops)
2921 goto replay;
2922 }
2923#endif
2924 return -EOPNOTSUPP;
2925 }
2926
b0ab2fab
JP		 2927 if (!ops->setup)
2928 return -EOPNOTSUPP;
2929
5517750f 2930 if (!ifname[0]) {
38f7b870 2931 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2932 name_assign_type = NET_NAME_ENUM;
2933 }
e7199288 2934
3a5f32cf 2935 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
13ad1774
EB		 2936 if (IS_ERR(dest_net))
2937 return PTR_ERR(dest_net);
2938
317f4810
ND		 2939 if (tb[IFLA_LINK_NETNSID]) {
2940 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2941
2942 link_net = get_net_ns_by_id(dest_net, id);
2943 if (!link_net) {
2944 err = -EINVAL;
2945 goto out;
2946 }
06615bed
EB		 2947 err = -EPERM;
2948 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2949 goto out;
317f4810
ND		 2950 }
2951
2952 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2953 name_assign_type, ops, tb);
9c7dafbf 2954 if (IS_ERR(dev)) {
e7199288 2955 err = PTR_ERR(dev);
9c7dafbf
PE		 2956 goto out;
2957 }
2958
2959 dev->ifindex = ifm->ifi_index;
2960
0e0eee24 2961 if (ops->newlink) {
7a3f4a18
MS		 2962 err = ops->newlink(link_net ? : net, dev, tb, data,
2963 extack);
0e0eee24 2964 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2965 * and unregister it on failure after registration
2966 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2967 */
e51fb152
CW		 2968 if (err < 0) {
2969 /* If device is not registered at all, free it now */
2970 if (dev->reg_state == NETREG_UNINITIALIZED)
2971 free_netdev(dev);
0e0eee24 2972 goto out;
e51fb152 2973 }
0e0eee24 2974 } else {
2d85cba2 2975 err = register_netdevice(dev);
0e0eee24
CW		 2976 if (err < 0) {
2977 free_netdev(dev);
2978 goto out;
2979 }
fce9b9be 2980 }
3729d502 2981 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2982 if (err < 0)
2983 goto out_unregister;
bdef279b 2984 if (link_net) {
317f4810 2985 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2986 if (err < 0)
43638900 2987 goto out_unregister;
bdef279b 2988 }
160ca014 2989 if (tb[IFLA_MASTER]) {
33eaf2a6
DA		 2990 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]),
2991 extack);
160ca014
TV		 2992 if (err)
2993 goto out_unregister;
2994 }
3729d502 2995out:
317f4810
ND		 2996 if (link_net)
2997 put_net(link_net);
81adee47 2998 put_net(dest_net);
38f7b870 2999 return err;
43638900
DM		 3000out_unregister:
3001 if (ops->newlink) {
3002 LIST_HEAD(list_kill);
3003
3004 ops->dellink(dev, &list_kill);
3005 unregister_netdevice_many(&list_kill);
3006 } else {
3007 unregister_netdevice(dev);
3008 }
3009 goto out;
38f7b870
PM		 3010 }
3011}
3012
c21ef3e3
DA		 3013static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3014 struct netlink_ext_ack *extack)
711e2c33 3015{
3b1e0a65 3016 struct net *net = sock_net(skb->sk);
79e1ad14 3017 struct net *tgt_net = net;
b60c5115 3018 struct ifinfomsg *ifm;
a3d12891 3019 char ifname[IFNAMSIZ];
b60c5115
TG		 3020 struct nlattr *tb[IFLA_MAX+1];
3021 struct net_device *dev = NULL;
3022 struct sk_buff *nskb;
79e1ad14 3023 int netnsid = -1;
339bf98f 3024 int err;
115c9b81 3025 u32 ext_filter_mask = 0;
711e2c33 3026
c21ef3e3 3027 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
b60c5115 3028 if (err < 0)
9918f230 3029 return err;
b60c5115 3030
a5a1a12d
CB		 3031 err = rtnl_ensure_unique_netns(tb, extack, true);
3032 if (err < 0)
3033 return err;
3034
79e1ad14
JB		 3035 if (tb[IFLA_IF_NETNSID]) {
3036 netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]);
f428fe4a 3037 tgt_net = get_target_net(NETLINK_CB(skb).sk, netnsid);
79e1ad14
JB		 3038 if (IS_ERR(tgt_net))
3039 return PTR_ERR(tgt_net);
3040 }
3041
a3d12891
ED		 3042 if (tb[IFLA_IFNAME])
3043 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3044
115c9b81
GR		 3045 if (tb[IFLA_EXT_MASK])
3046 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3047
79e1ad14 3048 err = -EINVAL;
b60c5115 3049 ifm = nlmsg_data(nlh);
a3d12891 3050 if (ifm->ifi_index > 0)
79e1ad14 3051 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
a3d12891 3052 else if (tb[IFLA_IFNAME])
79e1ad14 3053 dev = __dev_get_by_name(tgt_net, ifname);
a3d12891 3054 else
79e1ad14 3055 goto out;
711e2c33 3056
79e1ad14 3057 err = -ENODEV;
a3d12891 3058 if (dev == NULL)
79e1ad14 3059 goto out;
a3d12891 3060
79e1ad14 3061 err = -ENOBUFS;
115c9b81 3062 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891 3063 if (nskb == NULL)
79e1ad14 3064 goto out;
b60c5115 3065
79e1ad14
JB		 3066 err = rtnl_fill_ifinfo(nskb, dev, net,
3067 RTM_NEWLINK, NETLINK_CB(skb).portid,
3068 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
bb4a4d49 3069 0, NULL, 0, netnsid, GFP_KERNEL);
26932566
PM		 3070 if (err < 0) {
3071 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3072 WARN_ON(err == -EMSGSIZE);
3073 kfree_skb(nskb);
a3d12891 3074 } else
15e47304 3075 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
79e1ad14
JB		 3076out:
3077 if (netnsid >= 0)
3078 put_net(tgt_net);
711e2c33 3079
b60c5115 3080 return err;
711e2c33 3081}
711e2c33 3082
115c9b81 3083static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 3084{
115c9b81
GR		 3085 struct net *net = sock_net(skb->sk);
3086 struct net_device *dev;
3087 struct nlattr *tb[IFLA_MAX+1];
3088 u32 ext_filter_mask = 0;
3089 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 3090 int hdrlen;
3091
3092 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3093 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3094 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 3095
fceb6435 3096 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
a4b64fbe
ED		 3097 if (tb[IFLA_EXT_MASK])
3098 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3099 }
115c9b81
GR		 3100
3101 if (!ext_filter_mask)
3102 return NLMSG_GOODSIZE;
3103 /*
3104 * traverse the list of net devices and compute the minimum
3105 * buffer size based upon the filter mask.
3106 */
6853dd48
FW		 3107 rcu_read_lock();
3108 for_each_netdev_rcu(net, dev) {
115c9b81
GR		 3109 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
3110 if_nlmsg_size(dev,
3111 ext_filter_mask));
3112 }
6853dd48 3113 rcu_read_unlock();
115c9b81 3114
93af2056 3115 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 3116}
3117
42bad1da 3118static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 3119{
3120 int idx;
3121 int s_idx = cb->family;
4b488f08 3122 int type = cb->nlh->nlmsg_type - RTM_BASE;
1da177e4
LT		 3123
3124 if (s_idx == 0)
3125 s_idx = 1;
6853dd48 3126
25239cee 3127 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
6853dd48
FW		 3128 struct rtnl_link *handlers;
3129 rtnl_dumpit_func dumpit;
3130
1da177e4
LT		 3131 if (idx < s_idx || idx == PF_PACKET)
3132 continue;
6853dd48
FW		 3133
3134 handlers = rtnl_dereference(rtnl_msg_handlers[idx]);
3135 if (!handlers)
1da177e4 3136 continue;
6853dd48
FW		 3137
3138 dumpit = READ_ONCE(handlers[type].dumpit);
3139 if (!dumpit)
3140 continue;
3141
0465277f 3142 if (idx > s_idx) {
1da177e4 3143 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 3144 cb->prev_seq = 0;
3145 cb->seq = 0;
3146 }
6853dd48 3147 if (dumpit(skb, cb))
1da177e4
LT		 3148 break;
3149 }
3150 cb->family = idx;
3151
3152 return skb->len;
3153}
3154
395eea6c 3155struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3d3ea5af 3156 unsigned int change,
2177db43
ND		 3157 u32 event, gfp_t flags, int *new_nsid,
3158 int new_ifindex)
1da177e4 3159{
c346dca1 3160 struct net *net = dev_net(dev);
1da177e4 3161 struct sk_buff *skb;
0ec6d3f4 3162 int err = -ENOBUFS;
c7ac8679 3163 size_t if_info_size;
1da177e4 3164
7f294054 3165 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 3166 if (skb == NULL)
3167 goto errout;
1da177e4 3168
79e1ad14
JB		 3169 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3170 type, 0, 0, change, 0, 0, event,
bb4a4d49 3171 new_nsid, new_ifindex, -1, flags);
26932566
PM		 3172 if (err < 0) {
3173 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3174 WARN_ON(err == -EMSGSIZE);
3175 kfree_skb(skb);
3176 goto errout;
3177 }
395eea6c 3178 return skb;
0ec6d3f4
TG		 3179errout:
3180 if (err < 0)
4b3da706 3181 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 3182 return NULL;
3183}
3184
3185void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3186{
3187 struct net *net = dev_net(dev);
3188
3189 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3190}
3191
3d3ea5af
VY		 3192static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3193 unsigned int change, u32 event,
2177db43 3194 gfp_t flags, int *new_nsid, int new_ifindex)
395eea6c
MB		 3195{
3196 struct sk_buff *skb;
3197
ed2a80ab
ND		 3198 if (dev->reg_state != NETREG_REGISTERED)
3199 return;
3200
2177db43
ND		 3201 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3202 new_ifindex);
395eea6c
MB		 3203 if (skb)
3204 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 3205}
3d3ea5af
VY		 3206
3207void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3208 gfp_t flags)
3209{
2177db43
ND		 3210 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3211 NULL, 0);
3d3ea5af 3212}
1da177e4 3213
6621dd29 3214void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
2177db43 3215 gfp_t flags, int *new_nsid, int new_ifindex)
6621dd29
ND		 3216{
3217 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
2177db43 3218 new_nsid, new_ifindex);
6621dd29
ND		 3219}
3220
d83b0603
JF		 3221static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3222 struct net_device *dev,
1e53d5bb 3223 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 3224 int type, unsigned int flags,
b3379041 3225 int nlflags, u16 ndm_state)
d83b0603
JF		 3226{
3227 struct nlmsghdr *nlh;
3228 struct ndmsg *ndm;
3229
1c104a6b 3230 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 3231 if (!nlh)
3232 return -EMSGSIZE;
3233
3234 ndm = nlmsg_data(nlh);
3235 ndm->ndm_family = AF_BRIDGE;
3236 ndm->ndm_pad1 = 0;
3237 ndm->ndm_pad2 = 0;
3238 ndm->ndm_flags = flags;
3239 ndm->ndm_type = 0;
3240 ndm->ndm_ifindex = dev->ifindex;
b3379041 3241 ndm->ndm_state = ndm_state;
d83b0603
JF		 3242
3243 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3244 goto nla_put_failure;
1e53d5bb
HS		 3245 if (vid)
3246 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3247 goto nla_put_failure;
d83b0603 3248
053c095a
JB		 3249 nlmsg_end(skb, nlh);
3250 return 0;
d83b0603
JF		 3251
3252nla_put_failure:
3253 nlmsg_cancel(skb, nlh);
3254 return -EMSGSIZE;
3255}
3256
3ff661c3
JF		 3257static inline size_t rtnl_fdb_nlmsg_size(void)
3258{
f82ef3e1
SD		 3259 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3260 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3261 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3262 0;
3ff661c3
JF		 3263}
3264
b3379041
HS		 3265static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3266 u16 ndm_state)
3ff661c3
JF		 3267{
3268 struct net *net = dev_net(dev);
3269 struct sk_buff *skb;
3270 int err = -ENOBUFS;
3271
3272 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3273 if (!skb)
3274 goto errout;
3275
1e53d5bb 3276 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 3277 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 3278 if (err < 0) {
3279 kfree_skb(skb);
3280 goto errout;
3281 }
3282
3283 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3284 return;
3285errout:
3286 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3287}
3288
090096bf
VY		 3289/**
3290 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3291 */
3292int ndo_dflt_fdb_add(struct ndmsg *ndm,
3293 struct nlattr *tb[],
3294 struct net_device *dev,
f6f6424b 3295 const unsigned char *addr, u16 vid,
090096bf
VY		 3296 u16 flags)
3297{
3298 int err = -EINVAL;
3299
3300 /* If aging addresses are supported device will need to
3301 * implement its own handler for this.
3302 */
3303 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3304 pr_info("%s: FDB only supports static addresses\n", dev->name);
3305 return err;
3306 }
3307
65891fea
OG		 3308 if (vid) {
3309 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3310 return err;
3311 }
3312
090096bf
VY		 3313 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3314 err = dev_uc_add_excl(dev, addr);
3315 else if (is_multicast_ether_addr(addr))
3316 err = dev_mc_add_excl(dev, addr);
3317
3318 /* Only return duplicate errors if NLM_F_EXCL is set */
3319 if (err == -EEXIST && !(flags & NLM_F_EXCL))
3320 err = 0;
3321
3322 return err;
3323}
3324EXPORT_SYMBOL(ndo_dflt_fdb_add);
3325
b88d12e4
FW		 3326static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3327 struct netlink_ext_ack *extack)
f6f6424b
JP		 3328{
3329 u16 vid = 0;
3330
3331 if (vlan_attr) {
3332 if (nla_len(vlan_attr) != sizeof(u16)) {
b88d12e4 3333 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
f6f6424b
JP		 3334 return -EINVAL;
3335 }
3336
3337 vid = nla_get_u16(vlan_attr);
3338
3339 if (!vid || vid >= VLAN_VID_MASK) {
b88d12e4 3340 NL_SET_ERR_MSG(extack, "invalid vlan id");
f6f6424b
JP		 3341 return -EINVAL;
3342 }
3343 }
3344 *p_vid = vid;
3345 return 0;
3346}
3347
c21ef3e3
DA		 3348static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3349 struct netlink_ext_ack *extack)
77162022
JF		 3350{
3351 struct net *net = sock_net(skb->sk);
77162022
JF		 3352 struct ndmsg *ndm;
3353 struct nlattr *tb[NDA_MAX+1];
3354 struct net_device *dev;
3355 u8 *addr;
f6f6424b 3356 u16 vid;
77162022
JF		 3357 int err;
3358
c21ef3e3 3359 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
77162022
JF		 3360 if (err < 0)
3361 return err;
3362
3363 ndm = nlmsg_data(nlh);
3364 if (ndm->ndm_ifindex == 0) {
b88d12e4 3365 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 3366 return -EINVAL;
3367 }
3368
3369 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3370 if (dev == NULL) {
b88d12e4 3371 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 3372 return -ENODEV;
3373 }
3374
3375 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 3376 NL_SET_ERR_MSG(extack, "invalid address");
77162022
JF		 3377 return -EINVAL;
3378 }
3379
3fc00f1c
IS		 3380 if (dev->type != ARPHRD_ETHER) {
3381 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
3382 return -EINVAL;
3383 }
3384
77162022 3385 addr = nla_data(tb[NDA_LLADDR]);
77162022 3386
b88d12e4 3387 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 3388 if (err)
3389 return err;
3390
77162022
JF		 3391 err = -EOPNOTSUPP;
3392
3393 /* Support fdb on master device the net/bridge default case */
3394 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3395 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3396 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3397 const struct net_device_ops *ops = br_dev->netdev_ops;
3398
f6f6424b
JP		 3399 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3400 nlh->nlmsg_flags);
77162022
JF		 3401 if (err)
3402 goto out;
3403 else
3404 ndm->ndm_flags &= ~NTF_MASTER;
3405 }
3406
3407 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3408 if ((ndm->ndm_flags & NTF_SELF)) {
3409 if (dev->netdev_ops->ndo_fdb_add)
3410 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 3411 vid,
090096bf
VY		 3412 nlh->nlmsg_flags);
3413 else
f6f6424b 3414 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 3415 nlh->nlmsg_flags);
77162022 3416
3ff661c3 3417 if (!err) {
b3379041
HS		 3418 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3419 ndm->ndm_state);
77162022 3420 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3421 }
77162022
JF		 3422 }
3423out:
3424 return err;
3425}
3426
090096bf
VY		 3427/**
3428 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3429 */
3430int ndo_dflt_fdb_del(struct ndmsg *ndm,
3431 struct nlattr *tb[],
3432 struct net_device *dev,
f6f6424b 3433 const unsigned char *addr, u16 vid)
090096bf 3434{
c8a89c4a 3435 int err = -EINVAL;
090096bf
VY		 3436
3437 /* If aging addresses are supported device will need to
3438 * implement its own handler for this.
3439 */
64535993 3440 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 3441 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 3442 return err;
090096bf
VY		 3443 }
3444
3445 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3446 err = dev_uc_del(dev, addr);
3447 else if (is_multicast_ether_addr(addr))
3448 err = dev_mc_del(dev, addr);
090096bf
VY		 3449
3450 return err;
3451}
3452EXPORT_SYMBOL(ndo_dflt_fdb_del);
3453
c21ef3e3
DA		 3454static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3455 struct netlink_ext_ack *extack)
77162022
JF		 3456{
3457 struct net *net = sock_net(skb->sk);
3458 struct ndmsg *ndm;
1690be63 3459 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 3460 struct net_device *dev;
3461 int err = -EINVAL;
3462 __u8 *addr;
f6f6424b 3463 u16 vid;
77162022 3464
90f62cf3 3465 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 3466 return -EPERM;
3467
c21ef3e3 3468 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
1690be63
VY		 3469 if (err < 0)
3470 return err;
77162022
JF		 3471
3472 ndm = nlmsg_data(nlh);
3473 if (ndm->ndm_ifindex == 0) {
b88d12e4 3474 NL_SET_ERR_MSG(extack, "invalid ifindex");
77162022
JF		 3475 return -EINVAL;
3476 }
3477
3478 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3479 if (dev == NULL) {
b88d12e4 3480 NL_SET_ERR_MSG(extack, "unknown ifindex");
77162022
JF		 3481 return -ENODEV;
3482 }
3483
1690be63 3484 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
b88d12e4 3485 NL_SET_ERR_MSG(extack, "invalid address");
1690be63
VY		 3486 return -EINVAL;
3487 }
3488
3fc00f1c
IS		 3489 if (dev->type != ARPHRD_ETHER) {
3490 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
3491 return -EINVAL;
3492 }
3493
1690be63 3494 addr = nla_data(tb[NDA_LLADDR]);
77162022 3495
b88d12e4 3496 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
f6f6424b
JP		 3497 if (err)
3498 return err;
3499
77162022
JF		 3500 err = -EOPNOTSUPP;
3501
3502 /* Support fdb on master device the net/bridge default case */
3503 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3504 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3505 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3506 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 3507
898e5061 3508 if (ops->ndo_fdb_del)
f6f6424b 3509 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 3510
3511 if (err)
3512 goto out;
3513 else
3514 ndm->ndm_flags &= ~NTF_MASTER;
3515 }
3516
3517 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3518 if (ndm->ndm_flags & NTF_SELF) {
3519 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 3520 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3521 vid);
090096bf 3522 else
f6f6424b 3523 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 3524
3ff661c3 3525 if (!err) {
b3379041
HS		 3526 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3527 ndm->ndm_state);
77162022 3528 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3529 }
77162022
JF		 3530 }
3531out:
3532 return err;
3533}
3534
d83b0603
JF		 3535static int nlmsg_populate_fdb(struct sk_buff *skb,
3536 struct netlink_callback *cb,
3537 struct net_device *dev,
3538 int *idx,
3539 struct netdev_hw_addr_list *list)
3540{
3541 struct netdev_hw_addr *ha;
3542 int err;
15e47304 3543 u32 portid, seq;
d83b0603 3544
15e47304 3545 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 3546 seq = cb->nlh->nlmsg_seq;
3547
3548 list_for_each_entry(ha, &list->list, list) {
d297653d 3549 if (*idx < cb->args[2])
d83b0603
JF		 3550 goto skip;
3551
1e53d5bb 3552 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 3553 portid, seq,
1c104a6b 3554 RTM_NEWNEIGH, NTF_SELF,
b3379041 3555 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 3556 if (err < 0)
3557 return err;
3558skip:
3559 *idx += 1;
3560 }
3561 return 0;
3562}
3563
3564/**
2c53040f 3565 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 3566 * @nlh: netlink message header
3567 * @dev: netdevice
3568 *
3569 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 3570 * Returns number of addresses from list put in skb.
d83b0603
JF		 3571 */
3572int ndo_dflt_fdb_dump(struct sk_buff *skb,
3573 struct netlink_callback *cb,
3574 struct net_device *dev,
5d5eacb3 3575 struct net_device *filter_dev,
d297653d 3576 int *idx)
d83b0603
JF		 3577{
3578 int err;
3579
57291cc6
ED		 3580 if (dev->type != ARPHRD_ETHER)
3581 return -EINVAL;
3582
d83b0603 3583 netif_addr_lock_bh(dev);
d297653d 3584 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 3585 if (err)
3586 goto out;
2934c9db 3587 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 3588out:
3589 netif_addr_unlock_bh(dev);
d297653d 3590 return err;
d83b0603
JF		 3591}
3592EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3593
77162022
JF		 3594static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3595{
77162022 3596 struct net_device *dev;
5e6d2435 3597 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3598 struct net_device *br_dev = NULL;
3599 const struct net_device_ops *ops = NULL;
3600 const struct net_device_ops *cops = NULL;
3601 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3602 struct net *net = sock_net(skb->sk);
d297653d 3603 struct hlist_head *head;
5e6d2435
JHS		 3604 int brport_idx = 0;
3605 int br_idx = 0;
d297653d
RP		 3606 int h, s_h;
3607 int idx = 0, s_idx;
3608 int err = 0;
3609 int fidx = 0;
5e6d2435 3610
afd6c7e0
MFO		 3611 /* A hack to preserve kernel<->userspace interface.
3612 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
3613 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
3614 * So, check for ndmsg with an optional u32 attribute (not used here).
3615 * Fortunately these sizes don't conflict with the size of ifinfomsg
3616 * with an optional attribute.
3617 */
3618 if (nlmsg_len(cb->nlh) != sizeof(struct ndmsg) &&
3619 (nlmsg_len(cb->nlh) != sizeof(struct ndmsg) +
3620 nla_attr_size(sizeof(u32)))) {
3621 err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3622 IFLA_MAX, ifla_policy, NULL);
3623 if (err < 0) {
3624 return -EINVAL;
3625 } else if (err == 0) {
3626 if (tb[IFLA_MASTER])
3627 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3628 }
5e6d2435 3629
afd6c7e0
MFO		 3630 brport_idx = ifm->ifi_index;
3631 }
5e6d2435
JHS		 3632
3633 if (br_idx) {
3634 br_dev = __dev_get_by_index(net, br_idx);
3635 if (!br_dev)
3636 return -ENODEV;
3637
3638 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3639 }
3640
d297653d
RP		 3641 s_h = cb->args[0];
3642 s_idx = cb->args[1];
5e6d2435 3643
d297653d
RP		 3644 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3645 idx = 0;
3646 head = &net->dev_index_head[h];
3647 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 3648
d297653d 3649 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 3650 continue;
3651
d297653d
RP		 3652 if (!br_idx) { /* user did not specify a specific bridge */
3653 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3654 br_dev = netdev_master_upper_dev_get(dev);
3655 cops = br_dev->netdev_ops;
3656 }
3657 } else {
3658 if (dev != br_dev &&
3659 !(dev->priv_flags & IFF_BRIDGE_PORT))
3660 continue;
5e6d2435 3661
d297653d
RP		 3662 if (br_dev != netdev_master_upper_dev_get(dev) &&
3663 !(dev->priv_flags & IFF_EBRIDGE))
3664 continue;
3665 cops = ops;
3666 }
77162022 3667
d297653d
RP		 3668 if (idx < s_idx)
3669 goto cont;
77162022 3670
d297653d
RP		 3671 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3672 if (cops && cops->ndo_fdb_dump) {
3673 err = cops->ndo_fdb_dump(skb, cb,
3674 br_dev, dev,
3675 &fidx);
3676 if (err == -EMSGSIZE)
3677 goto out;
3678 }
3679 }
5e6d2435 3680
d297653d
RP		 3681 if (dev->netdev_ops->ndo_fdb_dump)
3682 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3683 dev, NULL,
3684 &fidx);
3685 else
3686 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3687 &fidx);
3688 if (err == -EMSGSIZE)
3689 goto out;
3690
3691 cops = NULL;
3692
3693 /* reset fdb offset to 0 for rest of the interfaces */
3694 cb->args[2] = 0;
3695 fidx = 0;
3696cont:
3697 idx++;
3698 }
77162022 3699 }
77162022 3700
d297653d
RP		 3701out:
3702 cb->args[0] = h;
3703 cb->args[1] = idx;
3704 cb->args[2] = fidx;
3705
77162022
JF		 3706 return skb->len;
3707}
3708
2c3c031c
SF		 3709static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3710 unsigned int attrnum, unsigned int flag)
3711{
3712 if (mask & flag)
3713 return nla_put_u8(skb, attrnum, !!(flags & flag));
3714 return 0;
3715}
3716
815cccbf 3717int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3718 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3719 u32 flags, u32 mask, int nlflags,
3720 u32 filter_mask,
3721 int (*vlan_fill)(struct sk_buff *skb,
3722 struct net_device *dev,
3723 u32 filter_mask))
815cccbf
JF		 3724{
3725 struct nlmsghdr *nlh;
3726 struct ifinfomsg *ifm;
3727 struct nlattr *br_afspec;
2c3c031c 3728 struct nlattr *protinfo;
815cccbf 3729 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3730 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3731 int err = 0;
815cccbf 3732
46c264da 3733 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3734 if (nlh == NULL)
3735 return -EMSGSIZE;
3736
3737 ifm = nlmsg_data(nlh);
3738 ifm->ifi_family = AF_BRIDGE;
3739 ifm->__ifi_pad = 0;
3740 ifm->ifi_type = dev->type;
3741 ifm->ifi_index = dev->ifindex;
3742 ifm->ifi_flags = dev_get_flags(dev);
3743 ifm->ifi_change = 0;
3744
3745
3746 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3747 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3748 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3749 (br_dev &&
3750 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3751 (dev->addr_len &&
3752 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3753 (dev->ifindex != dev_get_iflink(dev) &&
3754 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3755 goto nla_put_failure;
3756
3757 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3758 if (!br_afspec)
3759 goto nla_put_failure;
3760
1d460b98 3761 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3762 nla_nest_cancel(skb, br_afspec);
3763 goto nla_put_failure;
3764 }
1d460b98
RP		 3765
3766 if (mode != BRIDGE_MODE_UNDEF) {
3767 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3768 nla_nest_cancel(skb, br_afspec);
3769 goto nla_put_failure;
3770 }
3771 }
7d4f8d87
SF		 3772 if (vlan_fill) {
3773 err = vlan_fill(skb, dev, filter_mask);
3774 if (err) {
3775 nla_nest_cancel(skb, br_afspec);
3776 goto nla_put_failure;
3777 }
3778 }
815cccbf
JF		 3779 nla_nest_end(skb, br_afspec);
3780
2c3c031c
SF		 3781 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3782 if (!protinfo)
3783 goto nla_put_failure;
3784
3785 if (brport_nla_put_flag(skb, flags, mask,
3786 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3787 brport_nla_put_flag(skb, flags, mask,
3788 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3789 brport_nla_put_flag(skb, flags, mask,
3790 IFLA_BRPORT_FAST_LEAVE,
3791 BR_MULTICAST_FAST_LEAVE) ||
3792 brport_nla_put_flag(skb, flags, mask,
3793 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3794 brport_nla_put_flag(skb, flags, mask,
3795 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3796 brport_nla_put_flag(skb, flags, mask,
3797 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3798 brport_nla_put_flag(skb, flags, mask,
3799 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3800 brport_nla_put_flag(skb, flags, mask,
3801 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3802 nla_nest_cancel(skb, protinfo);
3803 goto nla_put_failure;
3804 }
3805
3806 nla_nest_end(skb, protinfo);
3807
053c095a
JB		 3808 nlmsg_end(skb, nlh);
3809 return 0;
815cccbf
JF		 3810nla_put_failure:
3811 nlmsg_cancel(skb, nlh);
7d4f8d87 3812 return err ? err : -EMSGSIZE;
815cccbf 3813}
7d4f8d87 3814EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3815
e5a55a89
JF		 3816static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3817{
3818 struct net *net = sock_net(skb->sk);
3819 struct net_device *dev;
3820 int idx = 0;
3821 u32 portid = NETLINK_CB(cb->skb).portid;
3822 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3823 u32 filter_mask = 0;
d64f69b0 3824 int err;
6cbdceeb 3825
aa68c20f
TG		 3826 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3827 struct nlattr *extfilt;
3828
3829 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3830 IFLA_EXT_MASK);
3831 if (extfilt) {
3832 if (nla_len(extfilt) < sizeof(filter_mask))
3833 return -EINVAL;
3834
3835 filter_mask = nla_get_u32(extfilt);
3836 }
3837 }
e5a55a89
JF		 3838
3839 rcu_read_lock();
3840 for_each_netdev_rcu(net, dev) {
3841 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3842 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3843
898e5061 3844 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3845 if (idx >= cb->args[0]) {
3846 err = br_dev->netdev_ops->ndo_bridge_getlink(
3847 skb, portid, seq, dev,
3848 filter_mask, NLM_F_MULTI);
f6c5775f
DA		 3849 if (err < 0 && err != -EOPNOTSUPP) {
3850 if (likely(skb->len))
3851 break;
3852
3853 goto out_err;
3854 }
d64f69b0 3855 }
25b1e679 3856 idx++;
e5a55a89
JF		 3857 }
3858
3859 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3860 if (idx >= cb->args[0]) {
3861 err = ops->ndo_bridge_getlink(skb, portid,
3862 seq, dev,
3863 filter_mask,
3864 NLM_F_MULTI);
f6c5775f
DA		 3865 if (err < 0 && err != -EOPNOTSUPP) {
3866 if (likely(skb->len))
3867 break;
3868
3869 goto out_err;
3870 }
d64f69b0 3871 }
25b1e679 3872 idx++;
e5a55a89
JF		 3873 }
3874 }
f6c5775f
DA		 3875 err = skb->len;
3876out_err:
e5a55a89
JF		 3877 rcu_read_unlock();
3878 cb->args[0] = idx;
3879
f6c5775f 3880 return err;
e5a55a89
JF		 3881}
3882
2469ffd7
JF		 3883static inline size_t bridge_nlmsg_size(void)
3884{
3885 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3886 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3887 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3888 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3889 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3890 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3891 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3892 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3893 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3894 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3895 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3896}
3897
02dba438 3898static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3899{
3900 struct net *net = dev_net(dev);
2469ffd7
JF		 3901 struct sk_buff *skb;
3902 int err = -EOPNOTSUPP;
3903
02dba438
RP		 3904 if (!dev->netdev_ops->ndo_bridge_getlink)
3905 return 0;
3906
2469ffd7
JF		 3907 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3908 if (!skb) {
3909 err = -ENOMEM;
3910 goto errout;
3911 }
3912
46c264da 3913 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3914 if (err < 0)
3915 goto errout;
2469ffd7 3916
59ccaaaa
RP		 3917 if (!skb->len)
3918 goto errout;
3919
2469ffd7
JF		 3920 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3921 return 0;
3922errout:
3923 WARN_ON(err == -EMSGSIZE);
3924 kfree_skb(skb);
59ccaaaa
RP		 3925 if (err)
3926 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3927 return err;
3928}
3929
c21ef3e3
DA		 3930static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3931 struct netlink_ext_ack *extack)
e5a55a89
JF		 3932{
3933 struct net *net = sock_net(skb->sk);
3934 struct ifinfomsg *ifm;
3935 struct net_device *dev;
2469ffd7
JF		 3936 struct nlattr *br_spec, *attr = NULL;
3937 int rem, err = -EOPNOTSUPP;
4de8b413 3938 u16 flags = 0;
c38e01b8 3939 bool have_flags = false;
e5a55a89
JF		 3940
3941 if (nlmsg_len(nlh) < sizeof(*ifm))
3942 return -EINVAL;
3943
3944 ifm = nlmsg_data(nlh);
3945 if (ifm->ifi_family != AF_BRIDGE)
3946 return -EPFNOSUPPORT;
3947
3948 dev = __dev_get_by_index(net, ifm->ifi_index);
3949 if (!dev) {
b88d12e4 3950 NL_SET_ERR_MSG(extack, "unknown ifindex");
e5a55a89
JF		 3951 return -ENODEV;
3952 }
3953
2469ffd7
JF		 3954 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3955 if (br_spec) {
3956 nla_for_each_nested(attr, br_spec, rem) {
3957 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3958 if (nla_len(attr) < sizeof(flags))
3959 return -EINVAL;
3960
c38e01b8 3961 have_flags = true;
2469ffd7
JF		 3962 flags = nla_get_u16(attr);
3963 break;
3964 }
3965 }
3966 }
3967
3968 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3969 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3970
3971 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3972 err = -EOPNOTSUPP;
3973 goto out;
3974 }
3975
add511b3 3976 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3977 if (err)
3978 goto out;
2469ffd7
JF		 3979
3980 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3981 }
3982
2469ffd7
JF		 3983 if ((flags & BRIDGE_FLAGS_SELF)) {
3984 if (!dev->netdev_ops->ndo_bridge_setlink)
3985 err = -EOPNOTSUPP;
3986 else
add511b3
RP		 3987 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3988 flags);
02dba438 3989 if (!err) {
2469ffd7 3990 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3991
3992 /* Generate event to notify upper layer of bridge
3993 * change
3994 */
3995 err = rtnl_bridge_notify(dev);
3996 }
2469ffd7 3997 }
e5a55a89 3998
c38e01b8 3999 if (have_flags)
2469ffd7 4000 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 4001out:
4002 return err;
4003}
4004
c21ef3e3
DA		 4005static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4006 struct netlink_ext_ack *extack)
407af329
VY		 4007{
4008 struct net *net = sock_net(skb->sk);
4009 struct ifinfomsg *ifm;
4010 struct net_device *dev;
4011 struct nlattr *br_spec, *attr = NULL;
4012 int rem, err = -EOPNOTSUPP;
4de8b413 4013 u16 flags = 0;
407af329
VY		 4014 bool have_flags = false;
4015
4016 if (nlmsg_len(nlh) < sizeof(*ifm))
4017 return -EINVAL;
4018
4019 ifm = nlmsg_data(nlh);
4020 if (ifm->ifi_family != AF_BRIDGE)
4021 return -EPFNOSUPPORT;
4022
4023 dev = __dev_get_by_index(net, ifm->ifi_index);
4024 if (!dev) {
b88d12e4 4025 NL_SET_ERR_MSG(extack, "unknown ifindex");
407af329
VY		 4026 return -ENODEV;
4027 }
4028
4029 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4030 if (br_spec) {
4031 nla_for_each_nested(attr, br_spec, rem) {
4032 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 4033 if (nla_len(attr) < sizeof(flags))
4034 return -EINVAL;
4035
407af329
VY		 4036 have_flags = true;
4037 flags = nla_get_u16(attr);
4038 break;
4039 }
4040 }
4041 }
4042
407af329
VY		 4043 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4044 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4045
4046 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4047 err = -EOPNOTSUPP;
4048 goto out;
4049 }
4050
add511b3 4051 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 4052 if (err)
4053 goto out;
4054
4055 flags &= ~BRIDGE_FLAGS_MASTER;
4056 }
4057
4058 if ((flags & BRIDGE_FLAGS_SELF)) {
4059 if (!dev->netdev_ops->ndo_bridge_dellink)
4060 err = -EOPNOTSUPP;
4061 else
add511b3
RP		 4062 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4063 flags);
407af329 4064
02dba438 4065 if (!err) {
407af329 4066 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 4067
4068 /* Generate event to notify upper layer of bridge
4069 * change
4070 */
4071 err = rtnl_bridge_notify(dev);
4072 }
407af329
VY		 4073 }
4074
4075 if (have_flags)
4076 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 4077out:
4078 return err;
4079}
4080
e8872a25
NA		 4081static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
4082{
4083 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
4084 (!idxattr || idxattr == attrid);
4085}
4086
69ae6ad2
NF		 4087#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
4088static int rtnl_get_offload_stats_attr_size(int attr_id)
4089{
4090 switch (attr_id) {
4091 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
4092 return sizeof(struct rtnl_link_stats64);
4093 }
4094
4095 return 0;
4096}
4097
4098static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
4099 int *prividx)
4100{
4101 struct nlattr *attr = NULL;
4102 int attr_id, size;
4103 void *attr_data;
4104 int err;
4105
4106 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4107 dev->netdev_ops->ndo_get_offload_stats))
4108 return -ENODATA;
4109
4110 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4111 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
4112 if (attr_id < *prividx)
4113 continue;
4114
4115 size = rtnl_get_offload_stats_attr_size(attr_id);
4116 if (!size)
4117 continue;
4118
3df5b3c6 4119 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 4120 continue;
4121
4122 attr = nla_reserve_64bit(skb, attr_id, size,
4123 IFLA_OFFLOAD_XSTATS_UNSPEC);
4124 if (!attr)
4125 goto nla_put_failure;
4126
4127 attr_data = nla_data(attr);
4128 memset(attr_data, 0, size);
4129 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
4130 attr_data);
4131 if (err)
4132 goto get_offload_stats_failure;
4133 }
4134
4135 if (!attr)
4136 return -ENODATA;
4137
4138 *prividx = 0;
4139 return 0;
4140
4141nla_put_failure:
4142 err = -EMSGSIZE;
4143get_offload_stats_failure:
4144 *prividx = attr_id;
4145 return err;
4146}
4147
4148static int rtnl_get_offload_stats_size(const struct net_device *dev)
4149{
4150 int nla_size = 0;
4151 int attr_id;
4152 int size;
4153
4154 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
4155 dev->netdev_ops->ndo_get_offload_stats))
4156 return 0;
4157
4158 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
4159 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3df5b3c6 4160 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 4161 continue;
4162 size = rtnl_get_offload_stats_attr_size(attr_id);
4163 nla_size += nla_total_size_64bit(size);
4164 }
4165
4166 if (nla_size != 0)
4167 nla_size += nla_total_size(0);
4168
4169 return nla_size;
4170}
4171
10c9ead9
RP		 4172static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
4173 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 4174 unsigned int flags, unsigned int filter_mask,
4175 int *idxattr, int *prividx)
10c9ead9
RP		 4176{
4177 struct if_stats_msg *ifsm;
4178 struct nlmsghdr *nlh;
4179 struct nlattr *attr;
e8872a25 4180 int s_prividx = *prividx;
69ae6ad2 4181 int err;
10c9ead9
RP		 4182
4183 ASSERT_RTNL();
4184
4185 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
4186 if (!nlh)
4187 return -EMSGSIZE;
4188
4189 ifsm = nlmsg_data(nlh);
ce024f42
NA		 4190 ifsm->family = PF_UNSPEC;
4191 ifsm->pad1 = 0;
4192 ifsm->pad2 = 0;
10c9ead9
RP		 4193 ifsm->ifindex = dev->ifindex;
4194 ifsm->filter_mask = filter_mask;
4195
e8872a25 4196 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 4197 struct rtnl_link_stats64 *sp;
10c9ead9 4198
58414d32
ND		 4199 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
4200 sizeof(struct rtnl_link_stats64),
4201 IFLA_STATS_UNSPEC);
10c9ead9
RP		 4202 if (!attr)
4203 goto nla_put_failure;
4204
4205 sp = nla_data(attr);
4206 dev_get_stats(dev, sp);
4207 }
4208
97a47fac
NA		 4209 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
4210 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
4211
4212 if (ops && ops->fill_linkxstats) {
97a47fac
NA		 4213 *idxattr = IFLA_STATS_LINK_XSTATS;
4214 attr = nla_nest_start(skb,
4215 IFLA_STATS_LINK_XSTATS);
4216 if (!attr)
4217 goto nla_put_failure;
4218
80e73cc5
NA		 4219 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
4220 nla_nest_end(skb, attr);
4221 if (err)
4222 goto nla_put_failure;
4223 *idxattr = 0;
4224 }
4225 }
4226
4227 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
4228 *idxattr)) {
4229 const struct rtnl_link_ops *ops = NULL;
4230 const struct net_device *master;
4231
4232 master = netdev_master_upper_dev_get(dev);
4233 if (master)
4234 ops = master->rtnl_link_ops;
4235 if (ops && ops->fill_linkxstats) {
80e73cc5
NA		 4236 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
4237 attr = nla_nest_start(skb,
4238 IFLA_STATS_LINK_XSTATS_SLAVE);
4239 if (!attr)
4240 goto nla_put_failure;
4241
4242 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 4243 nla_nest_end(skb, attr);
4244 if (err)
4245 goto nla_put_failure;
4246 *idxattr = 0;
4247 }
4248 }
4249
69ae6ad2
NF		 4250 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
4251 *idxattr)) {
4252 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
4253 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
4254 if (!attr)
4255 goto nla_put_failure;
4256
4257 err = rtnl_get_offload_stats(skb, dev, prividx);
4258 if (err == -ENODATA)
4259 nla_nest_cancel(skb, attr);
4260 else
4261 nla_nest_end(skb, attr);
4262
4263 if (err && err != -ENODATA)
4264 goto nla_put_failure;
4265 *idxattr = 0;
4266 }
4267
aefb4d4a
RS		 4268 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
4269 struct rtnl_af_ops *af_ops;
4270
4271 *idxattr = IFLA_STATS_AF_SPEC;
4272 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
4273 if (!attr)
4274 goto nla_put_failure;
4275
5fa85a09
FW		 4276 rcu_read_lock();
4277 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 4278 if (af_ops->fill_stats_af) {
4279 struct nlattr *af;
4280 int err;
4281
4282 af = nla_nest_start(skb, af_ops->family);
5fa85a09
FW		 4283 if (!af) {
4284 rcu_read_unlock();
aefb4d4a 4285 goto nla_put_failure;
5fa85a09 4286 }
aefb4d4a
RS		 4287 err = af_ops->fill_stats_af(skb, dev);
4288
5fa85a09 4289 if (err == -ENODATA) {
aefb4d4a 4290 nla_nest_cancel(skb, af);
5fa85a09
FW		 4291 } else if (err < 0) {
4292 rcu_read_unlock();
aefb4d4a 4293 goto nla_put_failure;
5fa85a09 4294 }
aefb4d4a
RS		 4295
4296 nla_nest_end(skb, af);
4297 }
4298 }
5fa85a09 4299 rcu_read_unlock();
aefb4d4a
RS		 4300
4301 nla_nest_end(skb, attr);
4302
4303 *idxattr = 0;
4304 }
4305
10c9ead9
RP		 4306 nlmsg_end(skb, nlh);
4307
4308 return 0;
4309
4310nla_put_failure:
e8872a25
NA		 4311 /* not a multi message or no progress mean a real error */
4312 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
4313 nlmsg_cancel(skb, nlh);
4314 else
4315 nlmsg_end(skb, nlh);
10c9ead9
RP		 4316
4317 return -EMSGSIZE;
4318}
4319
10c9ead9
RP		 4320static size_t if_nlmsg_stats_size(const struct net_device *dev,
4321 u32 filter_mask)
4322{
4323 size_t size = 0;
4324
e8872a25 4325 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 4326 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
4327
97a47fac
NA		 4328 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
4329 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 4330 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 4331
4332 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 4333 size += nla_total_size(ops->get_linkxstats_size(dev,
4334 attr));
97a47fac
NA		 4335 /* for IFLA_STATS_LINK_XSTATS */
4336 size += nla_total_size(0);
4337 }
4338 }
4339
80e73cc5
NA		 4340 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
4341 struct net_device *_dev = (struct net_device *)dev;
4342 const struct rtnl_link_ops *ops = NULL;
4343 const struct net_device *master;
4344
4345 /* netdev_master_upper_dev_get can't take const */
4346 master = netdev_master_upper_dev_get(_dev);
4347 if (master)
4348 ops = master->rtnl_link_ops;
4349 if (ops && ops->get_linkxstats_size) {
4350 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
4351
4352 size += nla_total_size(ops->get_linkxstats_size(dev,
4353 attr));
4354 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
4355 size += nla_total_size(0);
4356 }
4357 }
4358
69ae6ad2
NF		 4359 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
4360 size += rtnl_get_offload_stats_size(dev);
4361
aefb4d4a
RS		 4362 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
4363 struct rtnl_af_ops *af_ops;
4364
4365 /* for IFLA_STATS_AF_SPEC */
4366 size += nla_total_size(0);
4367
5fa85a09
FW		 4368 rcu_read_lock();
4369 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
aefb4d4a
RS		 4370 if (af_ops->get_stats_af_size) {
4371 size += nla_total_size(
4372 af_ops->get_stats_af_size(dev));
4373
4374 /* for AF_* */
4375 size += nla_total_size(0);
4376 }
4377 }
5fa85a09 4378 rcu_read_unlock();
aefb4d4a
RS		 4379 }
4380
10c9ead9
RP		 4381 return size;
4382}
4383
c21ef3e3
DA		 4384static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
4385 struct netlink_ext_ack *extack)
10c9ead9
RP		 4386{
4387 struct net *net = sock_net(skb->sk);
10c9ead9 4388 struct net_device *dev = NULL;
e8872a25
NA		 4389 int idxattr = 0, prividx = 0;
4390 struct if_stats_msg *ifsm;
10c9ead9
RP		 4391 struct sk_buff *nskb;
4392 u32 filter_mask;
4393 int err;
4394
4775cc1f
MK		 4395 if (nlmsg_len(nlh) < sizeof(*ifsm))
4396 return -EINVAL;
4397
10c9ead9
RP		 4398 ifsm = nlmsg_data(nlh);
4399 if (ifsm->ifindex > 0)
4400 dev = __dev_get_by_index(net, ifsm->ifindex);
4401 else
4402 return -EINVAL;
4403
4404 if (!dev)
4405 return -ENODEV;
4406
4407 filter_mask = ifsm->filter_mask;
4408 if (!filter_mask)
4409 return -EINVAL;
4410
4411 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4412 if (!nskb)
4413 return -ENOBUFS;
4414
4415 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4416 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 4417 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 4418 if (err < 0) {
4419 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4420 WARN_ON(err == -EMSGSIZE);
4421 kfree_skb(nskb);
4422 } else {
4423 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4424 }
4425
4426 return err;
4427}
4428
4429static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4430{
e8872a25 4431 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 4432 struct net *net = sock_net(skb->sk);
e8872a25 4433 unsigned int flags = NLM_F_MULTI;
10c9ead9 4434 struct if_stats_msg *ifsm;
10c9ead9 4435 struct hlist_head *head;
e8872a25 4436 struct net_device *dev;
10c9ead9 4437 u32 filter_mask = 0;
e8872a25 4438 int idx = 0;
10c9ead9
RP		 4439
4440 s_h = cb->args[0];
4441 s_idx = cb->args[1];
e8872a25
NA		 4442 s_idxattr = cb->args[2];
4443 s_prividx = cb->args[3];
10c9ead9
RP		 4444
4445 cb->seq = net->dev_base_seq;
4446
4775cc1f
MK		 4447 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4448 return -EINVAL;
4449
10c9ead9
RP		 4450 ifsm = nlmsg_data(cb->nlh);
4451 filter_mask = ifsm->filter_mask;
4452 if (!filter_mask)
4453 return -EINVAL;
4454
4455 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4456 idx = 0;
4457 head = &net->dev_index_head[h];
4458 hlist_for_each_entry(dev, head, index_hlist) {
4459 if (idx < s_idx)
4460 goto cont;
4461 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4462 NETLINK_CB(cb->skb).portid,
4463 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 4464 flags, filter_mask,
4465 &s_idxattr, &s_prividx);
10c9ead9
RP		 4466 /* If we ran out of room on the first message,
4467 * we're in trouble
4468 */
4469 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4470
4471 if (err < 0)
4472 goto out;
e8872a25
NA		 4473 s_prividx = 0;
4474 s_idxattr = 0;
10c9ead9
RP		 4475 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4476cont:
4477 idx++;
4478 }
4479 }
4480out:
e8872a25
NA		 4481 cb->args[3] = s_prividx;
4482 cb->args[2] = s_idxattr;
10c9ead9
RP		 4483 cb->args[1] = idx;
4484 cb->args[0] = h;
4485
4486 return skb->len;
4487}
4488
1da177e4
LT		 4489/* Process one rtnetlink message. */
4490
2d4bc933
JB		 4491static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4492 struct netlink_ext_ack *extack)
1da177e4 4493{
3b1e0a65 4494 struct net *net = sock_net(skb->sk);
6853dd48
FW		 4495 struct rtnl_link *handlers;
4496 int err = -EOPNOTSUPP;
e2849863 4497 rtnl_doit_func doit;
62256f98 4498 unsigned int flags;
617cfc75 4499 int kind;
1da177e4
LT		 4500 int family;
4501 int type;
1da177e4 4502
1da177e4 4503 type = nlh->nlmsg_type;
1da177e4 4504 if (type > RTM_MAX)
038890fe 4505 return -EOPNOTSUPP;
1da177e4
LT		 4506
4507 type -= RTM_BASE;
4508
4509 /* All the messages must have at least 1 byte length */
573ce260 4510 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 4511 return 0;
4512
573ce260 4513 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 4514 kind = type&3;
4515
90f62cf3 4516 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 4517 return -EPERM;
1da177e4 4518
5c2bb9b6 4519 if (family >= ARRAY_SIZE(rtnl_msg_handlers))
6853dd48
FW		 4520 family = PF_UNSPEC;
4521
4522 rcu_read_lock();
4523 handlers = rcu_dereference(rtnl_msg_handlers[family]);
4524 if (!handlers) {
4525 family = PF_UNSPEC;
4526 handlers = rcu_dereference(rtnl_msg_handlers[family]);
4527 }
4528
b8f3ab42 4529 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 4530 struct sock *rtnl;
e2849863 4531 rtnl_dumpit_func dumpit;
c7ac8679 4532 u16 min_dump_alloc = 0;
1da177e4 4533
6853dd48
FW		 4534 dumpit = READ_ONCE(handlers[type].dumpit);
4535 if (!dumpit) {
4536 family = PF_UNSPEC;
4537 handlers = rcu_dereference(rtnl_msg_handlers[PF_UNSPEC]);
4538 if (!handlers)
4539 goto err_unlock;
0cc09020 4540
6853dd48
FW		 4541 dumpit = READ_ONCE(handlers[type].dumpit);
4542 if (!dumpit)
4543 goto err_unlock;
4544 }
e1fa6d21 4545
019a3169
FW		 4546 refcount_inc(&rtnl_msg_handlers_ref[family]);
4547
5c2bb9b6 4548 if (type == RTM_GETLINK - RTM_BASE)
e1fa6d21 4549 min_dump_alloc = rtnl_calcit(skb, nlh);
9ac4a169 4550
6853dd48
FW		 4551 rcu_read_unlock();
4552
97c53cac 4553 rtnl = net->rtnl;
80d326fa
PNA		 4554 {
4555 struct netlink_dump_control c = {
4556 .dump = dumpit,
4557 .min_dump_alloc = min_dump_alloc,
4558 };
4559 err = netlink_dump_start(rtnl, skb, nlh, &c);
4560 }
019a3169 4561 refcount_dec(&rtnl_msg_handlers_ref[family]);
2907c35f 4562 return err;
1da177e4
LT		 4563 }
4564
8caa38b5
FW		 4565 doit = READ_ONCE(handlers[type].doit);
4566 if (!doit) {
4567 family = PF_UNSPEC;
4568 handlers = rcu_dereference(rtnl_msg_handlers[family]);
4569 }
4570
62256f98
FW		 4571 flags = READ_ONCE(handlers[type].flags);
4572 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
4573 refcount_inc(&rtnl_msg_handlers_ref[family]);
4574 doit = READ_ONCE(handlers[type].doit);
4575 rcu_read_unlock();
4576 if (doit)
4577 err = doit(skb, nlh, extack);
4578 refcount_dec(&rtnl_msg_handlers_ref[family]);
4579 return err;
4580 }
4581
6853dd48 4582 rcu_read_unlock();
1da177e4 4583
6853dd48
FW		 4584 rtnl_lock();
4585 handlers = rtnl_dereference(rtnl_msg_handlers[family]);
4586 if (handlers) {
4587 doit = READ_ONCE(handlers[type].doit);
4588 if (doit)
4589 err = doit(skb, nlh, extack);
4590 }
0cc09020 4591 rtnl_unlock();
0cc09020
FW		 4592 return err;
4593
4594err_unlock:
6853dd48 4595 rcu_read_unlock();
0cc09020 4596 return -EOPNOTSUPP;
1da177e4
LT		 4597}
4598
cd40b7d3 4599static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 4600{
cd40b7d3 4601 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
1da177e4
LT		 4602}
4603
5f729eaa
JG		 4604static int rtnetlink_bind(struct net *net, int group)
4605{
4606 switch (group) {
4607 case RTNLGRP_IPV4_MROUTE_R:
4608 case RTNLGRP_IPV6_MROUTE_R:
4609 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
4610 return -EPERM;
4611 break;
4612 }
4613 return 0;
4614}
4615
1da177e4
LT		 4616static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4617{
351638e7 4618 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 4619
1da177e4 4620 switch (event) {
5138e86f 4621 case NETDEV_REBOOT:
8a212589 4622 case NETDEV_CHANGEMTU:
3753654e 4623 case NETDEV_CHANGEADDR:
5138e86f
VY		 4624 case NETDEV_CHANGENAME:
4625 case NETDEV_FEAT_CHANGE:
4626 case NETDEV_BONDING_FAILOVER:
e6e66594 4627 case NETDEV_POST_TYPE_CHANGE:
5138e86f 4628 case NETDEV_NOTIFY_PEERS:
dc709f37 4629 case NETDEV_CHANGEUPPER:
5138e86f 4630 case NETDEV_RESEND_IGMP:
5138e86f 4631 case NETDEV_CHANGEINFODATA:
eeda3fb9 4632 case NETDEV_CHANGELOWERSTATE:
ebdcf045 4633 case NETDEV_CHANGE_TX_QUEUE_LEN:
3d3ea5af 4634 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
2177db43 4635 GFP_KERNEL, NULL, 0);
1da177e4
LT		 4636 break;
4637 default:
1da177e4
LT		 4638 break;
4639 }
4640 return NOTIFY_DONE;
4641}
4642
4643static struct notifier_block rtnetlink_dev_notifier = {
4644 .notifier_call = rtnetlink_event,
4645};
4646
97c53cac 4647
2c8c1e72 4648static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 4649{
4650 struct sock *sk;
a31f2d17
PNA		 4651 struct netlink_kernel_cfg cfg = {
4652 .groups = RTNLGRP_MAX,
4653 .input = rtnetlink_rcv,
4654 .cb_mutex = &rtnl_mutex,
9785e10a 4655 .flags = NL_CFG_F_NONROOT_RECV,
5f729eaa 4656 .bind = rtnetlink_bind,
a31f2d17
PNA		 4657 };
4658
9f00d977 4659 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 4660 if (!sk)
4661 return -ENOMEM;
97c53cac
DL		 4662 net->rtnl = sk;
4663 return 0;
4664}
4665
2c8c1e72 4666static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 4667{
775516bf
DL		 4668 netlink_kernel_release(net->rtnl);
4669 net->rtnl = NULL;
97c53cac
DL		 4670}
4671
4672static struct pernet_operations rtnetlink_net_ops = {
4673 .init = rtnetlink_net_init,
4674 .exit = rtnetlink_net_exit,
4675};
4676
1da177e4
LT		 4677void __init rtnetlink_init(void)
4678{
d38a6512
FW		 4679 int i;
4680
4681 for (i = 0; i < ARRAY_SIZE(rtnl_msg_handlers_ref); i++)
4682 refcount_set(&rtnl_msg_handlers_ref[i], 1);
4683
97c53cac 4684 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 4685 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 4686
1da177e4 4687 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 4688
c7ac8679 4689 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
b97bac64
FW		 4690 rtnl_dump_ifinfo, 0);
4691 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
4692 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
4693 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
687ad8cc 4694
b97bac64
FW		 4695 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
4696 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
4697 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
77162022 4698
b97bac64
FW		 4699 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
4700 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
4701 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, 0);
e5a55a89 4702
b97bac64
FW		 4703 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
4704 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
4705 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
10c9ead9
RP		 4706
4707 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
b97bac64 4708 0);
1da177e4 4709}
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