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Merge tag 'iio-for-4.13b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23...
[mirror_ubuntu-artful-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
1da177e4
LT		 19#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
1da177e4
LT		 24#include <linux/timer.h>
25#include <linux/string.h>
26#include <linux/sockios.h>
27#include <linux/net.h>
28#include <linux/fcntl.h>
29#include <linux/mm.h>
30#include <linux/slab.h>
31#include <linux/interrupt.h>
32#include <linux/capability.h>
33#include <linux/skbuff.h>
34#include <linux/init.h>
35#include <linux/security.h>
6756ae4b 36#include <linux/mutex.h>
1823730f 37#include <linux/if_addr.h>
77162022 38#include <linux/if_bridge.h>
f6f6424b 39#include <linux/if_vlan.h>
ebc08a6f 40#include <linux/pci.h>
77162022 41#include <linux/etherdevice.h>
1da177e4 42
7c0f6ba6 43#include <linux/uaccess.h>
1da177e4
LT		 44
45#include <linux/inet.h>
46#include <linux/netdevice.h>
82f28412 47#include <net/switchdev.h>
1da177e4
LT		 48#include <net/ip.h>
49#include <net/protocol.h>
50#include <net/arp.h>
51#include <net/route.h>
52#include <net/udp.h>
ea697639 53#include <net/tcp.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/pkt_sched.h>
14c0b97d 56#include <net/fib_rules.h>
e2849863 57#include <net/rtnetlink.h>
30ffee84 58#include <net/net_namespace.h>
1da177e4 59
e0d087af 60struct rtnl_link {
e2849863
TG		 61 rtnl_doit_func doit;
62 rtnl_dumpit_func dumpit;
c7ac8679 63 rtnl_calcit_func calcit;
e2849863
TG		 64};
65
6756ae4b 66static DEFINE_MUTEX(rtnl_mutex);
1da177e4
LT		 67
68void rtnl_lock(void)
69{
6756ae4b 70 mutex_lock(&rtnl_mutex);
1da177e4 71}
e0d087af 72EXPORT_SYMBOL(rtnl_lock);
1da177e4 73
1b5c5493
ED		 74static struct sk_buff *defer_kfree_skb_list;
75void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
76{
77 if (head && tail) {
78 tail->next = defer_kfree_skb_list;
79 defer_kfree_skb_list = head;
80 }
81}
82EXPORT_SYMBOL(rtnl_kfree_skbs);
83
6756ae4b 84void __rtnl_unlock(void)
1da177e4 85{
1b5c5493
ED		 86 struct sk_buff *head = defer_kfree_skb_list;
87
88 defer_kfree_skb_list = NULL;
89
6756ae4b 90 mutex_unlock(&rtnl_mutex);
1b5c5493
ED		 91
92 while (head) {
93 struct sk_buff *next = head->next;
94
95 kfree_skb(head);
96 cond_resched();
97 head = next;
98 }
1da177e4 99}
6756ae4b 100
1da177e4
LT		 101void rtnl_unlock(void)
102{
58ec3b4d 103 /* This fellow will unlock it for us. */
1da177e4
LT		 104 netdev_run_todo();
105}
e0d087af 106EXPORT_SYMBOL(rtnl_unlock);
1da177e4 107
6756ae4b
SH		 108int rtnl_trylock(void)
109{
110 return mutex_trylock(&rtnl_mutex);
111}
e0d087af 112EXPORT_SYMBOL(rtnl_trylock);
6756ae4b 113
c9c1014b
PM		 114int rtnl_is_locked(void)
115{
116 return mutex_is_locked(&rtnl_mutex);
117}
e0d087af 118EXPORT_SYMBOL(rtnl_is_locked);
c9c1014b 119
a898def2 120#ifdef CONFIG_PROVE_LOCKING
0cbf3343 121bool lockdep_rtnl_is_held(void)
a898def2
PM		 122{
123 return lockdep_is_held(&rtnl_mutex);
124}
125EXPORT_SYMBOL(lockdep_rtnl_is_held);
126#endif /* #ifdef CONFIG_PROVE_LOCKING */
127
25239cee 128static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
e2849863
TG		 129
130static inline int rtm_msgindex(int msgtype)
131{
132 int msgindex = msgtype - RTM_BASE;
133
134 /*
135 * msgindex < 0 implies someone tried to register a netlink
136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
137 * the message type has not been added to linux/rtnetlink.h
138 */
139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
140
141 return msgindex;
142}
143
144static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
145{
146 struct rtnl_link *tab;
147
25239cee 148 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 149 tab = rtnl_msg_handlers[protocol];
150 else
151 tab = NULL;
152
51057f2f 153 if (tab == NULL || tab[msgindex].doit == NULL)
e2849863
TG		 154 tab = rtnl_msg_handlers[PF_UNSPEC];
155
c80bbeae 156 return tab[msgindex].doit;
e2849863
TG		 157}
158
159static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
160{
161 struct rtnl_link *tab;
162
25239cee 163 if (protocol <= RTNL_FAMILY_MAX)
0f87b1dd
PM		 164 tab = rtnl_msg_handlers[protocol];
165 else
166 tab = NULL;
167
51057f2f 168 if (tab == NULL || tab[msgindex].dumpit == NULL)
e2849863
TG		 169 tab = rtnl_msg_handlers[PF_UNSPEC];
170
c80bbeae 171 return tab[msgindex].dumpit;
e2849863
TG		 172}
173
c7ac8679
GR		 174static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex)
175{
176 struct rtnl_link *tab;
177
178 if (protocol <= RTNL_FAMILY_MAX)
179 tab = rtnl_msg_handlers[protocol];
180 else
181 tab = NULL;
182
183 if (tab == NULL || tab[msgindex].calcit == NULL)
184 tab = rtnl_msg_handlers[PF_UNSPEC];
185
c80bbeae 186 return tab[msgindex].calcit;
c7ac8679
GR		 187}
188
e2849863
TG		 189/**
190 * __rtnl_register - Register a rtnetlink message type
191 * @protocol: Protocol family or PF_UNSPEC
192 * @msgtype: rtnetlink message type
193 * @doit: Function pointer called for each request message
194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
c7ac8679 195 * @calcit: Function pointer to calc size of dump message
e2849863
TG		 196 *
197 * Registers the specified function pointers (at least one of them has
198 * to be non-NULL) to be called whenever a request message for the
199 * specified protocol family and message type is received.
200 *
201 * The special protocol family PF_UNSPEC may be used to define fallback
202 * function pointers for the case when no entry for the specific protocol
203 * family exists.
204 *
205 * Returns 0 on success or a negative error code.
206 */
207int __rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 208 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
209 rtnl_calcit_func calcit)
e2849863
TG		 210{
211 struct rtnl_link *tab;
212 int msgindex;
213
25239cee 214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 215 msgindex = rtm_msgindex(msgtype);
216
217 tab = rtnl_msg_handlers[protocol];
218 if (tab == NULL) {
219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
220 if (tab == NULL)
221 return -ENOBUFS;
222
223 rtnl_msg_handlers[protocol] = tab;
224 }
225
226 if (doit)
227 tab[msgindex].doit = doit;
228
229 if (dumpit)
230 tab[msgindex].dumpit = dumpit;
231
c7ac8679
GR		 232 if (calcit)
233 tab[msgindex].calcit = calcit;
234
e2849863
TG		 235 return 0;
236}
e2849863
TG		 237EXPORT_SYMBOL_GPL(__rtnl_register);
238
239/**
240 * rtnl_register - Register a rtnetlink message type
241 *
242 * Identical to __rtnl_register() but panics on failure. This is useful
243 * as failure of this function is very unlikely, it can only happen due
244 * to lack of memory when allocating the chain to store all message
245 * handlers for a protocol. Meant for use in init functions where lack
25985edc 246 * of memory implies no sense in continuing.
e2849863
TG		 247 */
248void rtnl_register(int protocol, int msgtype,
c7ac8679
GR		 249 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
250 rtnl_calcit_func calcit)
e2849863 251{
c7ac8679 252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0)
e2849863
TG		 253 panic("Unable to register rtnetlink message handler, "
254 "protocol = %d, message type = %d\n",
255 protocol, msgtype);
256}
e2849863
TG		 257EXPORT_SYMBOL_GPL(rtnl_register);
258
259/**
260 * rtnl_unregister - Unregister a rtnetlink message type
261 * @protocol: Protocol family or PF_UNSPEC
262 * @msgtype: rtnetlink message type
263 *
264 * Returns 0 on success or a negative error code.
265 */
266int rtnl_unregister(int protocol, int msgtype)
267{
268 int msgindex;
269
25239cee 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 271 msgindex = rtm_msgindex(msgtype);
272
273 if (rtnl_msg_handlers[protocol] == NULL)
274 return -ENOENT;
275
276 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
f567e950 278 rtnl_msg_handlers[protocol][msgindex].calcit = NULL;
e2849863
TG		 279
280 return 0;
281}
e2849863
TG		 282EXPORT_SYMBOL_GPL(rtnl_unregister);
283
284/**
285 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
286 * @protocol : Protocol family or PF_UNSPEC
287 *
288 * Identical to calling rtnl_unregster() for all registered message types
289 * of a certain protocol family.
290 */
291void rtnl_unregister_all(int protocol)
292{
25239cee 293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
e2849863
TG		 294
295 kfree(rtnl_msg_handlers[protocol]);
296 rtnl_msg_handlers[protocol] = NULL;
297}
e2849863 298EXPORT_SYMBOL_GPL(rtnl_unregister_all);
1da177e4 299
38f7b870
PM		 300static LIST_HEAD(link_ops);
301
c63044f0
ED		 302static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
303{
304 const struct rtnl_link_ops *ops;
305
306 list_for_each_entry(ops, &link_ops, list) {
307 if (!strcmp(ops->kind, kind))
308 return ops;
309 }
310 return NULL;
311}
312
38f7b870
PM		 313/**
314 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
315 * @ops: struct rtnl_link_ops * to register
316 *
317 * The caller must hold the rtnl_mutex. This function should be used
318 * by drivers that create devices during module initialization. It
319 * must be called before registering the devices.
320 *
321 * Returns 0 on success or a negative error code.
322 */
323int __rtnl_link_register(struct rtnl_link_ops *ops)
324{
c63044f0
ED		 325 if (rtnl_link_ops_get(ops->kind))
326 return -EEXIST;
327
b0ab2fab
JP		 328 /* The check for setup is here because if ops
329 * does not have that filled up, it is not possible
330 * to use the ops for creating device. So do not
331 * fill up dellink as well. That disables rtnl_dellink.
332 */
333 if (ops->setup && !ops->dellink)
23289a37 334 ops->dellink = unregister_netdevice_queue;
2d85cba2 335
38f7b870
PM		 336 list_add_tail(&ops->list, &link_ops);
337 return 0;
338}
38f7b870
PM		 339EXPORT_SYMBOL_GPL(__rtnl_link_register);
340
341/**
342 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
343 * @ops: struct rtnl_link_ops * to register
344 *
345 * Returns 0 on success or a negative error code.
346 */
347int rtnl_link_register(struct rtnl_link_ops *ops)
348{
349 int err;
350
351 rtnl_lock();
352 err = __rtnl_link_register(ops);
353 rtnl_unlock();
354 return err;
355}
38f7b870
PM		 356EXPORT_SYMBOL_GPL(rtnl_link_register);
357
669f87ba
PE		 358static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
359{
360 struct net_device *dev;
23289a37
ED		 361 LIST_HEAD(list_kill);
362
669f87ba 363 for_each_netdev(net, dev) {
23289a37
ED		 364 if (dev->rtnl_link_ops == ops)
365 ops->dellink(dev, &list_kill);
669f87ba 366 }
23289a37 367 unregister_netdevice_many(&list_kill);
669f87ba
PE		 368}
369
38f7b870
PM		 370/**
371 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
372 * @ops: struct rtnl_link_ops * to unregister
373 *
2d85cba2 374 * The caller must hold the rtnl_mutex.
38f7b870
PM		 375 */
376void __rtnl_link_unregister(struct rtnl_link_ops *ops)
377{
881d966b 378 struct net *net;
2d85cba2 379
881d966b 380 for_each_net(net) {
669f87ba 381 __rtnl_kill_links(net, ops);
2d85cba2 382 }
38f7b870
PM		 383 list_del(&ops->list);
384}
38f7b870
PM		 385EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
386
200b916f
CW		 387/* Return with the rtnl_lock held when there are no network
388 * devices unregistering in any network namespace.
389 */
390static void rtnl_lock_unregistering_all(void)
391{
392 struct net *net;
393 bool unregistering;
ff960a73 394 DEFINE_WAIT_FUNC(wait, woken_wake_function);
200b916f 395
ff960a73 396 add_wait_queue(&netdev_unregistering_wq, &wait);
200b916f 397 for (;;) {
200b916f
CW		 398 unregistering = false;
399 rtnl_lock();
400 for_each_net(net) {
401 if (net->dev_unreg_count > 0) {
402 unregistering = true;
403 break;
404 }
405 }
406 if (!unregistering)
407 break;
408 __rtnl_unlock();
ff960a73
PZ		 409
410 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
200b916f 411 }
ff960a73 412 remove_wait_queue(&netdev_unregistering_wq, &wait);
200b916f
CW		 413}
414
38f7b870
PM		 415/**
416 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
417 * @ops: struct rtnl_link_ops * to unregister
418 */
419void rtnl_link_unregister(struct rtnl_link_ops *ops)
420{
200b916f
CW		 421 /* Close the race with cleanup_net() */
422 mutex_lock(&net_mutex);
423 rtnl_lock_unregistering_all();
38f7b870
PM		 424 __rtnl_link_unregister(ops);
425 rtnl_unlock();
200b916f 426 mutex_unlock(&net_mutex);
38f7b870 427}
38f7b870
PM		 428EXPORT_SYMBOL_GPL(rtnl_link_unregister);
429
ba7d49b1
JP		 430static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
431{
432 struct net_device *master_dev;
433 const struct rtnl_link_ops *ops;
434
435 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
436 if (!master_dev)
437 return 0;
438 ops = master_dev->rtnl_link_ops;
6049f253 439 if (!ops || !ops->get_slave_size)
ba7d49b1
JP		 440 return 0;
441 /* IFLA_INFO_SLAVE_DATA + nested data */
442 return nla_total_size(sizeof(struct nlattr)) +
443 ops->get_slave_size(master_dev, dev);
444}
445
38f7b870
PM		 446static size_t rtnl_link_get_size(const struct net_device *dev)
447{
448 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
449 size_t size;
450
451 if (!ops)
452 return 0;
453
369cf77a
TG		 454 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
455 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
38f7b870
PM		 456
457 if (ops->get_size)
458 /* IFLA_INFO_DATA + nested data */
369cf77a 459 size += nla_total_size(sizeof(struct nlattr)) +
38f7b870
PM		 460 ops->get_size(dev);
461
462 if (ops->get_xstats_size)
369cf77a
TG		 463 /* IFLA_INFO_XSTATS */
464 size += nla_total_size(ops->get_xstats_size(dev));
38f7b870 465
ba7d49b1
JP		 466 size += rtnl_link_get_slave_info_data_size(dev);
467
38f7b870
PM		 468 return size;
469}
470
f8ff182c
TG		 471static LIST_HEAD(rtnl_af_ops);
472
473static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
474{
475 const struct rtnl_af_ops *ops;
476
477 list_for_each_entry(ops, &rtnl_af_ops, list) {
478 if (ops->family == family)
479 return ops;
480 }
481
482 return NULL;
483}
484
f8ff182c
TG		 485/**
486 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
487 * @ops: struct rtnl_af_ops * to register
488 *
489 * Returns 0 on success or a negative error code.
490 */
3678a9d8 491void rtnl_af_register(struct rtnl_af_ops *ops)
f8ff182c 492{
f8ff182c 493 rtnl_lock();
3678a9d8 494 list_add_tail(&ops->list, &rtnl_af_ops);
f8ff182c 495 rtnl_unlock();
f8ff182c
TG		 496}
497EXPORT_SYMBOL_GPL(rtnl_af_register);
498
499/**
500 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
501 * @ops: struct rtnl_af_ops * to unregister
502 *
503 * The caller must hold the rtnl_mutex.
504 */
505void __rtnl_af_unregister(struct rtnl_af_ops *ops)
506{
507 list_del(&ops->list);
508}
509EXPORT_SYMBOL_GPL(__rtnl_af_unregister);
510
511/**
512 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
513 * @ops: struct rtnl_af_ops * to unregister
514 */
515void rtnl_af_unregister(struct rtnl_af_ops *ops)
516{
517 rtnl_lock();
518 __rtnl_af_unregister(ops);
519 rtnl_unlock();
520}
521EXPORT_SYMBOL_GPL(rtnl_af_unregister);
522
b1974ed0
AR		 523static size_t rtnl_link_get_af_size(const struct net_device *dev,
524 u32 ext_filter_mask)
f8ff182c
TG		 525{
526 struct rtnl_af_ops *af_ops;
527 size_t size;
528
529 /* IFLA_AF_SPEC */
530 size = nla_total_size(sizeof(struct nlattr));
531
532 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
533 if (af_ops->get_link_af_size) {
534 /* AF_* + nested data */
535 size += nla_total_size(sizeof(struct nlattr)) +
b1974ed0 536 af_ops->get_link_af_size(dev, ext_filter_mask);
f8ff182c
TG		 537 }
538 }
539
540 return size;
541}
542
ba7d49b1 543static bool rtnl_have_link_slave_info(const struct net_device *dev)
38f7b870 544{
ba7d49b1 545 struct net_device *master_dev;
38f7b870 546
ba7d49b1 547 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
813f020c 548 if (master_dev && master_dev->rtnl_link_ops)
ba7d49b1
JP		 549 return true;
550 return false;
551}
552
553static int rtnl_link_slave_info_fill(struct sk_buff *skb,
554 const struct net_device *dev)
555{
556 struct net_device *master_dev;
557 const struct rtnl_link_ops *ops;
558 struct nlattr *slave_data;
559 int err;
38f7b870 560
ba7d49b1
JP		 561 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
562 if (!master_dev)
563 return 0;
564 ops = master_dev->rtnl_link_ops;
565 if (!ops)
566 return 0;
567 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
568 return -EMSGSIZE;
569 if (ops->fill_slave_info) {
570 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA);
571 if (!slave_data)
572 return -EMSGSIZE;
573 err = ops->fill_slave_info(skb, master_dev, dev);
574 if (err < 0)
575 goto err_cancel_slave_data;
576 nla_nest_end(skb, slave_data);
577 }
578 return 0;
579
580err_cancel_slave_data:
581 nla_nest_cancel(skb, slave_data);
582 return err;
583}
584
585static int rtnl_link_info_fill(struct sk_buff *skb,
586 const struct net_device *dev)
587{
588 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
589 struct nlattr *data;
590 int err;
591
592 if (!ops)
593 return 0;
38f7b870 594 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
ba7d49b1 595 return -EMSGSIZE;
38f7b870
PM		 596 if (ops->fill_xstats) {
597 err = ops->fill_xstats(skb, dev);
598 if (err < 0)
ba7d49b1 599 return err;
38f7b870
PM		 600 }
601 if (ops->fill_info) {
602 data = nla_nest_start(skb, IFLA_INFO_DATA);
ba7d49b1
JP		 603 if (data == NULL)
604 return -EMSGSIZE;
38f7b870
PM		 605 err = ops->fill_info(skb, dev);
606 if (err < 0)
607 goto err_cancel_data;
608 nla_nest_end(skb, data);
609 }
38f7b870
PM		 610 return 0;
611
612err_cancel_data:
613 nla_nest_cancel(skb, data);
ba7d49b1
JP		 614 return err;
615}
616
617static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
618{
619 struct nlattr *linkinfo;
620 int err = -EMSGSIZE;
621
622 linkinfo = nla_nest_start(skb, IFLA_LINKINFO);
623 if (linkinfo == NULL)
624 goto out;
625
626 err = rtnl_link_info_fill(skb, dev);
627 if (err < 0)
628 goto err_cancel_link;
629
630 err = rtnl_link_slave_info_fill(skb, dev);
631 if (err < 0)
632 goto err_cancel_link;
633
634 nla_nest_end(skb, linkinfo);
635 return 0;
636
38f7b870
PM		 637err_cancel_link:
638 nla_nest_cancel(skb, linkinfo);
639out:
640 return err;
641}
642
95c96174 643int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
1da177e4 644{
97c53cac 645 struct sock *rtnl = net->rtnl;
1da177e4
LT		 646 int err = 0;
647
ac6d439d 648 NETLINK_CB(skb).dst_group = group;
1da177e4
LT		 649 if (echo)
650 atomic_inc(&skb->users);
651 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
652 if (echo)
653 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
654 return err;
655}
656
97c53cac 657int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
2942e900 658{
97c53cac
DL		 659 struct sock *rtnl = net->rtnl;
660
2942e900
TG		 661 return nlmsg_unicast(rtnl, skb, pid);
662}
e0d087af 663EXPORT_SYMBOL(rtnl_unicast);
2942e900 664
1ce85fe4
PNA		 665void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
666 struct nlmsghdr *nlh, gfp_t flags)
97676b6b 667{
97c53cac 668 struct sock *rtnl = net->rtnl;
97676b6b
TG		 669 int report = 0;
670
671 if (nlh)
672 report = nlmsg_report(nlh);
673
1ce85fe4 674 nlmsg_notify(rtnl, skb, pid, group, report, flags);
97676b6b 675}
e0d087af 676EXPORT_SYMBOL(rtnl_notify);
97676b6b 677
97c53cac 678void rtnl_set_sk_err(struct net *net, u32 group, int error)
97676b6b 679{
97c53cac
DL		 680 struct sock *rtnl = net->rtnl;
681
97676b6b
TG		 682 netlink_set_err(rtnl, 0, group, error);
683}
e0d087af 684EXPORT_SYMBOL(rtnl_set_sk_err);
97676b6b 685
1da177e4
LT		 686int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
687{
2d7202bf
TG		 688 struct nlattr *mx;
689 int i, valid = 0;
690
691 mx = nla_nest_start(skb, RTA_METRICS);
692 if (mx == NULL)
693 return -ENOBUFS;
694
695 for (i = 0; i < RTAX_MAX; i++) {
696 if (metrics[i]) {
ea697639
DB		 697 if (i == RTAX_CC_ALGO - 1) {
698 char tmp[TCP_CA_NAME_MAX], *name;
699
700 name = tcp_ca_get_name_by_key(metrics[i], tmp);
701 if (!name)
702 continue;
703 if (nla_put_string(skb, i + 1, name))
704 goto nla_put_failure;
c3a8d947
DB		 705 } else if (i == RTAX_FEATURES - 1) {
706 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
707
f8edcd12
PS		 708 if (!user_features)
709 continue;
c3a8d947
DB		 710 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
711 if (nla_put_u32(skb, i + 1, user_features))
712 goto nla_put_failure;
ea697639
DB		 713 } else {
714 if (nla_put_u32(skb, i + 1, metrics[i]))
715 goto nla_put_failure;
716 }
2d7202bf 717 valid++;
2d7202bf 718 }
1da177e4 719 }
1da177e4 720
a57d27fc
DM		 721 if (!valid) {
722 nla_nest_cancel(skb, mx);
723 return 0;
724 }
2d7202bf
TG		 725
726 return nla_nest_end(skb, mx);
727
728nla_put_failure:
bc3ed28c
TG		 729 nla_nest_cancel(skb, mx);
730 return -EMSGSIZE;
1da177e4 731}
e0d087af 732EXPORT_SYMBOL(rtnetlink_put_metrics);
1da177e4 733
e3703b3d 734int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
87a50699 735 long expires, u32 error)
e3703b3d
TG		 736{
737 struct rta_cacheinfo ci = {
a399a805 738 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse),
e3703b3d
TG		 739 .rta_used = dst->__use,
740 .rta_clntref = atomic_read(&(dst->__refcnt)),
741 .rta_error = error,
742 .rta_id = id,
e3703b3d
TG		 743 };
744
8253947e
LW		 745 if (expires) {
746 unsigned long clock;
e3703b3d 747
8253947e
LW		 748 clock = jiffies_to_clock_t(abs(expires));
749 clock = min_t(unsigned long, clock, INT_MAX);
750 ci.rta_expires = (expires > 0) ? clock : -clock;
751 }
e3703b3d
TG		 752 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
753}
e3703b3d 754EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
1da177e4 755
93b2d4a2 756static void set_operstate(struct net_device *dev, unsigned char transition)
b00055aa
SR		 757{
758 unsigned char operstate = dev->operstate;
759
e0d087af 760 switch (transition) {
b00055aa
SR		 761 case IF_OPER_UP:
762 if ((operstate == IF_OPER_DORMANT ||
763 operstate == IF_OPER_UNKNOWN) &&
764 !netif_dormant(dev))
765 operstate = IF_OPER_UP;
766 break;
767
768 case IF_OPER_DORMANT:
769 if (operstate == IF_OPER_UP ||
770 operstate == IF_OPER_UNKNOWN)
771 operstate = IF_OPER_DORMANT;
772 break;
3ff50b79 773 }
b00055aa
SR		 774
775 if (dev->operstate != operstate) {
776 write_lock_bh(&dev_base_lock);
777 dev->operstate = operstate;
778 write_unlock_bh(&dev_base_lock);
93b2d4a2
DM		 779 netdev_state_change(dev);
780 }
b00055aa
SR		 781}
782
b1beb681
JB		 783static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
784{
785 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
786 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
787}
788
3729d502
PM		 789static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
790 const struct ifinfomsg *ifm)
791{
792 unsigned int flags = ifm->ifi_flags;
793
794 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
795 if (ifm->ifi_change)
796 flags = (flags & ifm->ifi_change) |
b1beb681 797 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
3729d502
PM		 798
799 return flags;
800}
801
b60c5115 802static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
be1f3c2c 803 const struct rtnl_link_stats64 *b)
1da177e4 804{
b60c5115
TG		 805 a->rx_packets = b->rx_packets;
806 a->tx_packets = b->tx_packets;
807 a->rx_bytes = b->rx_bytes;
808 a->tx_bytes = b->tx_bytes;
809 a->rx_errors = b->rx_errors;
810 a->tx_errors = b->tx_errors;
811 a->rx_dropped = b->rx_dropped;
812 a->tx_dropped = b->tx_dropped;
813
814 a->multicast = b->multicast;
815 a->collisions = b->collisions;
816
817 a->rx_length_errors = b->rx_length_errors;
818 a->rx_over_errors = b->rx_over_errors;
819 a->rx_crc_errors = b->rx_crc_errors;
820 a->rx_frame_errors = b->rx_frame_errors;
821 a->rx_fifo_errors = b->rx_fifo_errors;
822 a->rx_missed_errors = b->rx_missed_errors;
823
824 a->tx_aborted_errors = b->tx_aborted_errors;
825 a->tx_carrier_errors = b->tx_carrier_errors;
826 a->tx_fifo_errors = b->tx_fifo_errors;
827 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
828 a->tx_window_errors = b->tx_window_errors;
829
830 a->rx_compressed = b->rx_compressed;
831 a->tx_compressed = b->tx_compressed;
6e7333d3
JW		 832
833 a->rx_nohandler = b->rx_nohandler;
10708f37
JE		 834}
835
c02db8c6 836/* All VF info */
115c9b81
GR		 837static inline int rtnl_vfinfo_size(const struct net_device *dev,
838 u32 ext_filter_mask)
ebc08a6f 839{
9af15c38 840 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
c02db8c6 841 int num_vfs = dev_num_vf(dev->dev.parent);
7e75f74a 842 size_t size = nla_total_size(0);
045de01a 843 size += num_vfs *
7e75f74a
SD		 844 (nla_total_size(0) +
845 nla_total_size(sizeof(struct ifla_vf_mac)) +
846 nla_total_size(sizeof(struct ifla_vf_vlan)) +
847 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
79aab093
MS		 848 nla_total_size(MAX_VLAN_LIST_LEN *
849 sizeof(struct ifla_vf_vlan_info)) +
ed616689 850 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
7e75f74a 851 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
945a3676 852 nla_total_size(sizeof(struct ifla_vf_rate)) +
01a3d796 853 nla_total_size(sizeof(struct ifla_vf_link_state)) +
3b766cd8 854 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
7e75f74a 855 nla_total_size(0) + /* nest IFLA_VF_STATS */
3b766cd8 856 /* IFLA_VF_STATS_RX_PACKETS */
343a6d8e 857 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 858 /* IFLA_VF_STATS_TX_PACKETS */
343a6d8e 859 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 860 /* IFLA_VF_STATS_RX_BYTES */
343a6d8e 861 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 862 /* IFLA_VF_STATS_TX_BYTES */
343a6d8e 863 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 864 /* IFLA_VF_STATS_BROADCAST */
343a6d8e 865 nla_total_size_64bit(sizeof(__u64)) +
3b766cd8 866 /* IFLA_VF_STATS_MULTICAST */
343a6d8e 867 nla_total_size_64bit(sizeof(__u64)) +
dd461d6a 868 nla_total_size(sizeof(struct ifla_vf_trust)));
c02db8c6
CW		 869 return size;
870 } else
ebc08a6f
WM		 871 return 0;
872}
873
c53864fd
DG		 874static size_t rtnl_port_size(const struct net_device *dev,
875 u32 ext_filter_mask)
57b61080
SF		 876{
877 size_t port_size = nla_total_size(4) /* PORT_VF */
878 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
57b61080
SF		 879 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
880 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
881 + nla_total_size(1) /* PROT_VDP_REQUEST */
882 + nla_total_size(2); /* PORT_VDP_RESPONSE */
883 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
884 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
885 + port_size;
886 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
887 + port_size;
888
c53864fd
DG		 889 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
890 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 891 return 0;
892 if (dev_num_vf(dev->dev.parent))
893 return port_self_size + vf_ports_size +
894 vf_port_size * dev_num_vf(dev->dev.parent);
895 else
896 return port_self_size;
897}
898
b5cdae32 899static size_t rtnl_xdp_size(void)
d1fdd913 900{
b3cfaa31 901 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
d67b9cd2 902 nla_total_size(1); /* XDP_ATTACHED */
d1fdd913 903
b5cdae32 904 return xdp_size;
d1fdd913
BB		 905}
906
115c9b81
GR		 907static noinline size_t if_nlmsg_size(const struct net_device *dev,
908 u32 ext_filter_mask)
339bf98f
TG		 909{
910 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
911 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 912 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 913 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 914 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 915 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 916 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 917 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
918 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
919 + nla_total_size(4) /* IFLA_TXQLEN */
920 + nla_total_size(4) /* IFLA_WEIGHT */
921 + nla_total_size(4) /* IFLA_MTU */
922 + nla_total_size(4) /* IFLA_LINK */
923 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 924 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 925 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 926 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
927 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
6919756c
TK		 928 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
929 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
339bf98f 930 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 931 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 932 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 933 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 934 + nla_total_size(ext_filter_mask
935 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
936 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 937 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 938 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 939 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 940 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 941 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 942 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
b5cdae32 943 + rtnl_xdp_size() /* IFLA_XDP */
88d6378b
AK		 944 + nla_total_size(1); /* IFLA_PROTO_DOWN */
945
339bf98f
TG		 946}
947
57b61080
SF		 948static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
949{
950 struct nlattr *vf_ports;
951 struct nlattr *vf_port;
952 int vf;
953 int err;
954
955 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
956 if (!vf_ports)
957 return -EMSGSIZE;
958
959 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
960 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 961 if (!vf_port)
962 goto nla_put_failure;
a6574349
DM		 963 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
964 goto nla_put_failure;
57b61080 965 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 966 if (err == -EMSGSIZE)
967 goto nla_put_failure;
57b61080 968 if (err) {
57b61080
SF		 969 nla_nest_cancel(skb, vf_port);
970 continue;
971 }
972 nla_nest_end(skb, vf_port);
973 }
974
975 nla_nest_end(skb, vf_ports);
976
977 return 0;
8ca94183
SF		 978
979nla_put_failure:
980 nla_nest_cancel(skb, vf_ports);
981 return -EMSGSIZE;
57b61080
SF		 982}
983
984static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
985{
986 struct nlattr *port_self;
987 int err;
988
989 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
990 if (!port_self)
991 return -EMSGSIZE;
992
993 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
994 if (err) {
995 nla_nest_cancel(skb, port_self);
8ca94183 996 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 997 }
998
999 nla_nest_end(skb, port_self);
1000
1001 return 0;
1002}
1003
c53864fd
DG		 1004static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1005 u32 ext_filter_mask)
57b61080
SF		 1006{
1007 int err;
1008
c53864fd
DG		 1009 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1010 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1011 return 0;
1012
1013 err = rtnl_port_self_fill(skb, dev);
1014 if (err)
1015 return err;
1016
1017 if (dev_num_vf(dev->dev.parent)) {
1018 err = rtnl_vf_ports_fill(skb, dev);
1019 if (err)
1020 return err;
1021 }
1022
1023 return 0;
1024}
1025
66cae9ed
JP		 1026static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1027{
1028 int err;
02637fce 1029 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1030
1031 err = dev_get_phys_port_id(dev, &ppid);
1032 if (err) {
1033 if (err == -EOPNOTSUPP)
1034 return 0;
1035 return err;
1036 }
1037
1038 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1039 return -EMSGSIZE;
1040
1041 return 0;
1042}
1043
db24a904
DA		 1044static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1045{
1046 char name[IFNAMSIZ];
1047 int err;
1048
1049 err = dev_get_phys_port_name(dev, name, sizeof(name));
1050 if (err) {
1051 if (err == -EOPNOTSUPP)
1052 return 0;
1053 return err;
1054 }
1055
77ef033b 1056 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
db24a904
DA		 1057 return -EMSGSIZE;
1058
1059 return 0;
1060}
1061
82f28412
JP		 1062static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1063{
1064 int err;
f8e20a9f 1065 struct switchdev_attr attr = {
6ff64f6f 1066 .orig_dev = dev,
1f868398 1067 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1068 .flags = SWITCHDEV_F_NO_RECURSE,
1069 };
82f28412 1070
f8e20a9f 1071 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1072 if (err) {
1073 if (err == -EOPNOTSUPP)
1074 return 0;
1075 return err;
1076 }
1077
42275bd8
SF		 1078 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1079 attr.u.ppid.id))
82f28412
JP		 1080 return -EMSGSIZE;
1081
1082 return 0;
1083}
1084
b22b941b
HFS		 1085static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1086 struct net_device *dev)
1087{
550bce59 1088 struct rtnl_link_stats64 *sp;
b22b941b 1089 struct nlattr *attr;
18402843 1090
58414d32
ND		 1091 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1092 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1093 if (!attr)
1094 return -EMSGSIZE;
1095
550bce59
RP		 1096 sp = nla_data(attr);
1097 dev_get_stats(dev, sp);
b22b941b 1098
550bce59
RP		 1099 attr = nla_reserve(skb, IFLA_STATS,
1100 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1101 if (!attr)
1102 return -EMSGSIZE;
1103
550bce59 1104 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1105
1106 return 0;
1107}
1108
1109static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1110 struct net_device *dev,
1111 int vfs_num,
1112 struct nlattr *vfinfo)
1113{
1114 struct ifla_vf_rss_query_en vf_rss_query_en;
79aab093 1115 struct nlattr *vf, *vfstats, *vfvlanlist;
b22b941b 1116 struct ifla_vf_link_state vf_linkstate;
79aab093 1117 struct ifla_vf_vlan_info vf_vlan_info;
b22b941b
HFS		 1118 struct ifla_vf_spoofchk vf_spoofchk;
1119 struct ifla_vf_tx_rate vf_tx_rate;
1120 struct ifla_vf_stats vf_stats;
1121 struct ifla_vf_trust vf_trust;
1122 struct ifla_vf_vlan vf_vlan;
1123 struct ifla_vf_rate vf_rate;
b22b941b
HFS		 1124 struct ifla_vf_mac vf_mac;
1125 struct ifla_vf_info ivi;
1126
0eed9cf5
MY		 1127 memset(&ivi, 0, sizeof(ivi));
1128
b22b941b
HFS		 1129 /* Not all SR-IOV capable drivers support the
1130 * spoofcheck and "RSS query enable" query. Preset to
1131 * -1 so the user space tool can detect that the driver
1132 * didn't report anything.
1133 */
1134 ivi.spoofchk = -1;
1135 ivi.rss_query_en = -1;
1136 ivi.trusted = -1;
b22b941b
HFS		 1137 /* The default value for VF link state is "auto"
1138 * IFLA_VF_LINK_STATE_AUTO which equals zero
1139 */
1140 ivi.linkstate = 0;
79aab093
MS		 1141 /* VLAN Protocol by default is 802.1Q */
1142 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1143 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1144 return 0;
1145
775f4f05
DC		 1146 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1147
b22b941b
HFS		 1148 vf_mac.vf =
1149 vf_vlan.vf =
79aab093 1150 vf_vlan_info.vf =
b22b941b
HFS		 1151 vf_rate.vf =
1152 vf_tx_rate.vf =
1153 vf_spoofchk.vf =
1154 vf_linkstate.vf =
1155 vf_rss_query_en.vf =
1156 vf_trust.vf = ivi.vf;
1157
1158 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1159 vf_vlan.vlan = ivi.vlan;
1160 vf_vlan.qos = ivi.qos;
79aab093
MS		 1161 vf_vlan_info.vlan = ivi.vlan;
1162 vf_vlan_info.qos = ivi.qos;
1163 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1164 vf_tx_rate.rate = ivi.max_tx_rate;
1165 vf_rate.min_tx_rate = ivi.min_tx_rate;
1166 vf_rate.max_tx_rate = ivi.max_tx_rate;
1167 vf_spoofchk.setting = ivi.spoofchk;
1168 vf_linkstate.link_state = ivi.linkstate;
1169 vf_rss_query_en.setting = ivi.rss_query_en;
1170 vf_trust.setting = ivi.trusted;
1171 vf = nla_nest_start(skb, IFLA_VF_INFO);
79aab093
MS		 1172 if (!vf)
1173 goto nla_put_vfinfo_failure;
b22b941b
HFS		 1174 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1175 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1176 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1177 &vf_rate) ||
1178 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1179 &vf_tx_rate) ||
1180 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1181 &vf_spoofchk) ||
1182 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1183 &vf_linkstate) ||
1184 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1185 sizeof(vf_rss_query_en),
1186 &vf_rss_query_en) ||
1187 nla_put(skb, IFLA_VF_TRUST,
1188 sizeof(vf_trust), &vf_trust))
79aab093
MS		 1189 goto nla_put_vf_failure;
1190 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1191 if (!vfvlanlist)
1192 goto nla_put_vf_failure;
1193 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1194 &vf_vlan_info)) {
1195 nla_nest_cancel(skb, vfvlanlist);
1196 goto nla_put_vf_failure;
1197 }
1198 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1199 memset(&vf_stats, 0, sizeof(vf_stats));
1200 if (dev->netdev_ops->ndo_get_vf_stats)
1201 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1202 &vf_stats);
1203 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
79aab093
MS		 1204 if (!vfstats)
1205 goto nla_put_vf_failure;
343a6d8e
ND		 1206 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1207 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1208 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1209 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1210 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1211 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1212 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1213 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1214 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1215 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1216 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
79aab093
MS		 1217 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1218 nla_nest_cancel(skb, vfstats);
1219 goto nla_put_vf_failure;
1220 }
b22b941b
HFS		 1221 nla_nest_end(skb, vfstats);
1222 nla_nest_end(skb, vf);
1223 return 0;
79aab093
MS		 1224
1225nla_put_vf_failure:
1226 nla_nest_cancel(skb, vf);
1227nla_put_vfinfo_failure:
1228 nla_nest_cancel(skb, vfinfo);
1229 return -EMSGSIZE;
b22b941b
HFS		 1230}
1231
1232static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1233{
5f8e4474
KL		 1234 struct rtnl_link_ifmap map;
1235
1236 memset(&map, 0, sizeof(map));
1237 map.mem_start = dev->mem_start;
1238 map.mem_end = dev->mem_end;
1239 map.base_addr = dev->base_addr;
1240 map.irq = dev->irq;
1241 map.dma = dev->dma;
1242 map.port = dev->if_port;
1243
270cb4d0 1244 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1245 return -EMSGSIZE;
1246
1247 return 0;
1248}
1249
d67b9cd2
DB		 1250static u8 rtnl_xdp_attached_mode(struct net_device *dev)
1251{
1252 const struct net_device_ops *ops = dev->netdev_ops;
1253
1254 ASSERT_RTNL();
1255
1256 if (rcu_access_pointer(dev->xdp_prog))
1257 return XDP_ATTACHED_SKB;
1258 if (ops->ndo_xdp && __dev_xdp_attached(dev, ops->ndo_xdp))
1259 return XDP_ATTACHED_DRV;
1260
1261 return XDP_ATTACHED_NONE;
1262}
1263
d1fdd913
BB		 1264static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1265{
d1fdd913
BB		 1266 struct nlattr *xdp;
1267 int err;
1268
d1fdd913
BB		 1269 xdp = nla_nest_start(skb, IFLA_XDP);
1270 if (!xdp)
1271 return -EMSGSIZE;
d67b9cd2
DB		 1272
1273 err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
1274 rtnl_xdp_attached_mode(dev));
d1fdd913
BB		 1275 if (err)
1276 goto err_cancel;
1277
1278 nla_nest_end(skb, xdp);
1279 return 0;
1280
1281err_cancel:
1282 nla_nest_cancel(skb, xdp);
1283 return err;
1284}
1285
b60c5115 1286static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1287 int type, u32 pid, u32 seq, u32 change,
bf74b20d 1288 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1289{
1290 struct ifinfomsg *ifm;
1291 struct nlmsghdr *nlh;
b22b941b 1292 struct nlattr *af_spec;
f8ff182c 1293 struct rtnl_af_ops *af_ops;
898e5061 1294 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1295
2907c35f 1296 ASSERT_RTNL();
b60c5115
TG		 1297 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1298 if (nlh == NULL)
26932566 1299 return -EMSGSIZE;
1da177e4 1300
b60c5115
TG		 1301 ifm = nlmsg_data(nlh);
1302 ifm->ifi_family = AF_UNSPEC;
1303 ifm->__ifi_pad = 0;
1304 ifm->ifi_type = dev->type;
1305 ifm->ifi_index = dev->ifindex;
1306 ifm->ifi_flags = dev_get_flags(dev);
1307 ifm->ifi_change = change;
1308
a6574349
DM		 1309 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1310 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1311 nla_put_u8(skb, IFLA_OPERSTATE,
1312 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1313 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1314 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1315 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1316 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1317 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1318 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1319 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1320#ifdef CONFIG_RPS
76ff5cc9 1321 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1322#endif
a54acb3a
ND		 1323 (dev->ifindex != dev_get_iflink(dev) &&
1324 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1325 (upper_dev &&
1326 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1327 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1328 (dev->qdisc &&
1329 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1330 (dev->ifalias &&
2d3b479d 1331 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1332 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1333 atomic_read(&dev->carrier_changes)) ||
1334 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1335 goto nla_put_failure;
0b815a1a 1336
b22b941b
HFS		 1337 if (rtnl_fill_link_ifmap(skb, dev))
1338 goto nla_put_failure;
1da177e4
LT		 1339
1340 if (dev->addr_len) {
a6574349
DM		 1341 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1342 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1343 goto nla_put_failure;
1da177e4
LT		 1344 }
1345
66cae9ed
JP		 1346 if (rtnl_phys_port_id_fill(skb, dev))
1347 goto nla_put_failure;
1348
db24a904
DA		 1349 if (rtnl_phys_port_name_fill(skb, dev))
1350 goto nla_put_failure;
1351
82f28412
JP		 1352 if (rtnl_phys_switch_id_fill(skb, dev))
1353 goto nla_put_failure;
1354
b22b941b 1355 if (rtnl_fill_stats(skb, dev))
10708f37 1356 goto nla_put_failure;
10708f37 1357
a6574349
DM		 1358 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1359 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1360 goto nla_put_failure;
57b61080 1361
b22b941b
HFS		 1362 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1363 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1364 int i;
b22b941b 1365 struct nlattr *vfinfo;
c02db8c6
CW		 1366 int num_vfs = dev_num_vf(dev->dev.parent);
1367
c02db8c6
CW		 1368 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1369 if (!vfinfo)
1370 goto nla_put_failure;
1371 for (i = 0; i < num_vfs; i++) {
b22b941b 1372 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1373 goto nla_put_failure;
ebc08a6f 1374 }
b22b941b 1375
c02db8c6 1376 nla_nest_end(skb, vfinfo);
ebc08a6f 1377 }
57b61080 1378
c53864fd 1379 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1380 goto nla_put_failure;
1381
d1fdd913
BB		 1382 if (rtnl_xdp_fill(skb, dev))
1383 goto nla_put_failure;
1384
ba7d49b1 1385 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1386 if (rtnl_link_fill(skb, dev) < 0)
1387 goto nla_put_failure;
1388 }
1389
d37512a2
ND		 1390 if (dev->rtnl_link_ops &&
1391 dev->rtnl_link_ops->get_link_net) {
1392 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1393
1394 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1395 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1396
1397 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1398 goto nla_put_failure;
1399 }
1400 }
1401
f8ff182c
TG		 1402 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1403 goto nla_put_failure;
1404
1405 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1406 if (af_ops->fill_link_af) {
1407 struct nlattr *af;
1408 int err;
1409
1410 if (!(af = nla_nest_start(skb, af_ops->family)))
1411 goto nla_put_failure;
1412
d5566fd7 1413 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1414
1415 /*
1416 * Caller may return ENODATA to indicate that there
1417 * was no data to be dumped. This is not an error, it
1418 * means we should trim the attribute header and
1419 * continue.
1420 */
1421 if (err == -ENODATA)
1422 nla_nest_cancel(skb, af);
1423 else if (err < 0)
1424 goto nla_put_failure;
1425
1426 nla_nest_end(skb, af);
1427 }
1428 }
1429
1430 nla_nest_end(skb, af_spec);
1431
053c095a
JB		 1432 nlmsg_end(skb, nlh);
1433 return 0;
b60c5115
TG		 1434
1435nla_put_failure:
26932566
PM		 1436 nlmsg_cancel(skb, nlh);
1437 return -EMSGSIZE;
1da177e4
LT		 1438}
1439
f7b12606 1440static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1441 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1442 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1443 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1444 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1445 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1446 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1447 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1448 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1449 [IFLA_TXQLEN] = { .type = NLA_U32 },
1450 [IFLA_WEIGHT] = { .type = NLA_U32 },
1451 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1452 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1453 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1454 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1455 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1456 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1457 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1458 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1459 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1460 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1461 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1462 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1463 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1464 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1465 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1466 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1467 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1468 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1469 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1470 [IFLA_XDP] = { .type = NLA_NESTED },
da5e0494
TG		 1471};
1472
38f7b870
PM		 1473static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1474 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1475 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1476 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1477 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1478};
1479
c02db8c6 1480static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1481 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1482 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1483 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1484 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1485 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1486 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1487 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1488 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1489 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1490 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1491 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1492 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1493};
1494
57b61080
SF		 1495static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1496 [IFLA_PORT_VF] = { .type = NLA_U32 },
1497 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1498 .len = PORT_PROFILE_MAX },
57b61080
SF		 1499 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1500 .len = PORT_UUID_MAX },
1501 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1502 .len = PORT_UUID_MAX },
1503 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1504 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 1505
1506 /* Unused, but we need to keep it here since user space could
1507 * fill it. It's also broken with regard to NLA_BINARY use in
1508 * combination with structs.
1509 */
1510 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1511 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 1512};
1513
d1fdd913
BB		 1514static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1515 [IFLA_XDP_FD] = { .type = NLA_S32 },
1516 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 1517 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
d1fdd913
BB		 1518};
1519
dc599f76
DA		 1520static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1521{
1522 const struct rtnl_link_ops *ops = NULL;
1523 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1524
fceb6435
JB		 1525 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1526 ifla_info_policy, NULL) < 0)
dc599f76
DA		 1527 return NULL;
1528
1529 if (linfo[IFLA_INFO_KIND]) {
1530 char kind[MODULE_NAME_LEN];
1531
1532 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1533 ops = rtnl_link_ops_get(kind);
1534 }
1535
1536 return ops;
1537}
1538
1539static bool link_master_filtered(struct net_device *dev, int master_idx)
1540{
1541 struct net_device *master;
1542
1543 if (!master_idx)
1544 return false;
1545
1546 master = netdev_master_upper_dev_get(dev);
1547 if (!master || master->ifindex != master_idx)
1548 return true;
1549
1550 return false;
1551}
1552
1553static bool link_kind_filtered(const struct net_device *dev,
1554 const struct rtnl_link_ops *kind_ops)
1555{
1556 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1557 return true;
1558
1559 return false;
1560}
1561
1562static bool link_dump_filtered(struct net_device *dev,
1563 int master_idx,
1564 const struct rtnl_link_ops *kind_ops)
1565{
1566 if (link_master_filtered(dev, master_idx) ||
1567 link_kind_filtered(dev, kind_ops))
1568 return true;
1569
1570 return false;
1571}
1572
f7b12606
JP		 1573static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1574{
1575 struct net *net = sock_net(skb->sk);
1576 int h, s_h;
1577 int idx = 0, s_idx;
1578 struct net_device *dev;
1579 struct hlist_head *head;
1580 struct nlattr *tb[IFLA_MAX+1];
1581 u32 ext_filter_mask = 0;
dc599f76
DA		 1582 const struct rtnl_link_ops *kind_ops = NULL;
1583 unsigned int flags = NLM_F_MULTI;
1584 int master_idx = 0;
973462bb 1585 int err;
e5eca6d4 1586 int hdrlen;
f7b12606
JP		 1587
1588 s_h = cb->args[0];
1589 s_idx = cb->args[1];
1590
f7b12606
JP		 1591 cb->seq = net->dev_base_seq;
1592
e5eca6d4
MS		 1593 /* A hack to preserve kernel<->userspace interface.
1594 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1595 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1596 * what iproute2 < v3.9.0 used.
1597 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1598 * attribute, its netlink message is shorter than struct ifinfomsg.
1599 */
1600 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1601 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1602
fceb6435
JB		 1603 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1604 ifla_policy, NULL) >= 0) {
f7b12606
JP		 1605 if (tb[IFLA_EXT_MASK])
1606 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1607
1608 if (tb[IFLA_MASTER])
1609 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1610
1611 if (tb[IFLA_LINKINFO])
1612 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1613
1614 if (master_idx || kind_ops)
1615 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1616 }
1617
1618 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1619 idx = 0;
1620 head = &net->dev_index_head[h];
cac5e65e 1621 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 1622 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 1623 goto cont;
f7b12606
JP		 1624 if (idx < s_idx)
1625 goto cont;
973462bb
DG		 1626 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1627 NETLINK_CB(cb->skb).portid,
1628 cb->nlh->nlmsg_seq, 0,
dc599f76 1629 flags,
bf74b20d 1630 ext_filter_mask);
973462bb 1631
f6c5775f
DA		 1632 if (err < 0) {
1633 if (likely(skb->len))
1634 goto out;
1635
1636 goto out_err;
1637 }
f7b12606
JP		 1638
1639 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1640cont:
1641 idx++;
1642 }
1643 }
1644out:
f6c5775f
DA		 1645 err = skb->len;
1646out_err:
f7b12606
JP		 1647 cb->args[1] = idx;
1648 cb->args[0] = h;
1649
f6c5775f 1650 return err;
f7b12606
JP		 1651}
1652
fceb6435
JB		 1653int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1654 struct netlink_ext_ack *exterr)
f7b12606 1655{
fceb6435 1656 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
f7b12606
JP		 1657}
1658EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1659
81adee47
EB		 1660struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1661{
1662 struct net *net;
1663 /* Examine the link attributes and figure out which
1664 * network namespace we are talking about.
1665 */
1666 if (tb[IFLA_NET_NS_PID])
1667 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1668 else if (tb[IFLA_NET_NS_FD])
1669 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1670 else
1671 net = get_net(src_net);
1672 return net;
1673}
1674EXPORT_SYMBOL(rtnl_link_get_net);
1675
1840bb13
TG		 1676static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1677{
1678 if (dev) {
1679 if (tb[IFLA_ADDRESS] &&
1680 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1681 return -EINVAL;
1682
1683 if (tb[IFLA_BROADCAST] &&
1684 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1685 return -EINVAL;
1686 }
1687
cf7afbfe
TG		 1688 if (tb[IFLA_AF_SPEC]) {
1689 struct nlattr *af;
1690 int rem, err;
1691
1692 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1693 const struct rtnl_af_ops *af_ops;
1694
1695 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1696 return -EAFNOSUPPORT;
1697
1698 if (!af_ops->set_link_af)
1699 return -EOPNOTSUPP;
1700
1701 if (af_ops->validate_link_af) {
6d3a9a68 1702 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1703 if (err < 0)
1704 return err;
1705 }
1706 }
1707 }
1708
1840bb13
TG		 1709 return 0;
1710}
1711
cc8e27cc
EC		 1712static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1713 int guid_type)
1714{
1715 const struct net_device_ops *ops = dev->netdev_ops;
1716
1717 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1718}
1719
1720static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1721{
1722 if (dev->type != ARPHRD_INFINIBAND)
1723 return -EOPNOTSUPP;
1724
1725 return handle_infiniband_guid(dev, ivt, guid_type);
1726}
1727
4f7d2cdf 1728static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1729{
c02db8c6 1730 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1731 int err = -EINVAL;
c02db8c6 1732
4f7d2cdf
DB		 1733 if (tb[IFLA_VF_MAC]) {
1734 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1735
4f7d2cdf
DB		 1736 err = -EOPNOTSUPP;
1737 if (ops->ndo_set_vf_mac)
1738 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1739 ivm->mac);
1740 if (err < 0)
1741 return err;
1742 }
1743
1744 if (tb[IFLA_VF_VLAN]) {
1745 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1746
1747 err = -EOPNOTSUPP;
1748 if (ops->ndo_set_vf_vlan)
1749 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 1750 ivv->qos,
1751 htons(ETH_P_8021Q));
1752 if (err < 0)
1753 return err;
1754 }
1755
1756 if (tb[IFLA_VF_VLAN_LIST]) {
1757 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1758 struct nlattr *attr;
1759 int rem, len = 0;
1760
1761 err = -EOPNOTSUPP;
1762 if (!ops->ndo_set_vf_vlan)
1763 return err;
1764
1765 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1766 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1767 nla_len(attr) < NLA_HDRLEN) {
1768 return -EINVAL;
1769 }
1770 if (len >= MAX_VLAN_LIST_LEN)
1771 return -EOPNOTSUPP;
1772 ivvl[len] = nla_data(attr);
1773
1774 len++;
1775 }
fa34cd94
AB		 1776 if (len == 0)
1777 return -EINVAL;
1778
79aab093
MS		 1779 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1780 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 1781 if (err < 0)
1782 return err;
c02db8c6 1783 }
4f7d2cdf
DB		 1784
1785 if (tb[IFLA_VF_TX_RATE]) {
1786 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1787 struct ifla_vf_info ivf;
1788
1789 err = -EOPNOTSUPP;
1790 if (ops->ndo_get_vf_config)
1791 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1792 if (err < 0)
1793 return err;
1794
1795 err = -EOPNOTSUPP;
1796 if (ops->ndo_set_vf_rate)
1797 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1798 ivf.min_tx_rate,
1799 ivt->rate);
1800 if (err < 0)
1801 return err;
1802 }
1803
1804 if (tb[IFLA_VF_RATE]) {
1805 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1806
1807 err = -EOPNOTSUPP;
1808 if (ops->ndo_set_vf_rate)
1809 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1810 ivt->min_tx_rate,
1811 ivt->max_tx_rate);
1812 if (err < 0)
1813 return err;
1814 }
1815
1816 if (tb[IFLA_VF_SPOOFCHK]) {
1817 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1818
1819 err = -EOPNOTSUPP;
1820 if (ops->ndo_set_vf_spoofchk)
1821 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1822 ivs->setting);
1823 if (err < 0)
1824 return err;
1825 }
1826
1827 if (tb[IFLA_VF_LINK_STATE]) {
1828 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1829
1830 err = -EOPNOTSUPP;
1831 if (ops->ndo_set_vf_link_state)
1832 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1833 ivl->link_state);
1834 if (err < 0)
1835 return err;
1836 }
1837
1838 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1839 struct ifla_vf_rss_query_en *ivrssq_en;
1840
1841 err = -EOPNOTSUPP;
1842 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1843 if (ops->ndo_set_vf_rss_query_en)
1844 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1845 ivrssq_en->setting);
1846 if (err < 0)
1847 return err;
1848 }
1849
dd461d6a
HS		 1850 if (tb[IFLA_VF_TRUST]) {
1851 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1852
1853 err = -EOPNOTSUPP;
1854 if (ops->ndo_set_vf_trust)
1855 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1856 if (err < 0)
1857 return err;
1858 }
1859
cc8e27cc
EC		 1860 if (tb[IFLA_VF_IB_NODE_GUID]) {
1861 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1862
1863 if (!ops->ndo_set_vf_guid)
1864 return -EOPNOTSUPP;
1865
1866 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1867 }
1868
1869 if (tb[IFLA_VF_IB_PORT_GUID]) {
1870 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1871
1872 if (!ops->ndo_set_vf_guid)
1873 return -EOPNOTSUPP;
1874
1875 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1876 }
1877
c02db8c6
CW		 1878 return err;
1879}
1880
fbaec0ea
JP		 1881static int do_set_master(struct net_device *dev, int ifindex)
1882{
898e5061 1883 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1884 const struct net_device_ops *ops;
1885 int err;
1886
898e5061
JP		 1887 if (upper_dev) {
1888 if (upper_dev->ifindex == ifindex)
fbaec0ea 1889 return 0;
898e5061 1890 ops = upper_dev->netdev_ops;
fbaec0ea 1891 if (ops->ndo_del_slave) {
898e5061 1892 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1893 if (err)
1894 return err;
1895 } else {
1896 return -EOPNOTSUPP;
1897 }
1898 }
1899
1900 if (ifindex) {
898e5061
JP		 1901 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1902 if (!upper_dev)
fbaec0ea 1903 return -EINVAL;
898e5061 1904 ops = upper_dev->netdev_ops;
fbaec0ea 1905 if (ops->ndo_add_slave) {
898e5061 1906 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1907 if (err)
1908 return err;
1909 } else {
1910 return -EOPNOTSUPP;
1911 }
1912 }
1913 return 0;
1914}
1915
90c325e3 1916#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1917/* notify flag means notify + modified. */
1918#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1919static int do_setlink(const struct sk_buff *skb,
1920 struct net_device *dev, struct ifinfomsg *ifm,
ddf9f970 1921 struct netlink_ext_ack *extack,
90c325e3 1922 struct nlattr **tb, char *ifname, int status)
1da177e4 1923{
d314774c 1924 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1925 int err;
1da177e4 1926
f0630529 1927 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1928 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1929 if (IS_ERR(net)) {
1930 err = PTR_ERR(net);
1931 goto errout;
1932 }
90f62cf3 1933 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1934 put_net(net);
b51642f6
EB		 1935 err = -EPERM;
1936 goto errout;
1937 }
d8a5ec67
EB		 1938 err = dev_change_net_namespace(dev, net, ifname);
1939 put_net(net);
1940 if (err)
1941 goto errout;
90c325e3 1942 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1943 }
1944
da5e0494 1945 if (tb[IFLA_MAP]) {
1da177e4
LT		 1946 struct rtnl_link_ifmap *u_map;
1947 struct ifmap k_map;
1948
d314774c 1949 if (!ops->ndo_set_config) {
1da177e4 1950 err = -EOPNOTSUPP;
0157f60c 1951 goto errout;
1da177e4
LT		 1952 }
1953
1954 if (!netif_device_present(dev)) {
1955 err = -ENODEV;
0157f60c 1956 goto errout;
1da177e4 1957 }
1da177e4 1958
da5e0494 1959 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1960 k_map.mem_start = (unsigned long) u_map->mem_start;
1961 k_map.mem_end = (unsigned long) u_map->mem_end;
1962 k_map.base_addr = (unsigned short) u_map->base_addr;
1963 k_map.irq = (unsigned char) u_map->irq;
1964 k_map.dma = (unsigned char) u_map->dma;
1965 k_map.port = (unsigned char) u_map->port;
1966
d314774c 1967 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1968 if (err < 0)
0157f60c 1969 goto errout;
1da177e4 1970
ba998906 1971 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1972 }
1973
da5e0494 1974 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1975 struct sockaddr *sa;
1976 int len;
1977
70f8e78e
DM		 1978 len = sizeof(sa_family_t) + dev->addr_len;
1979 sa = kmalloc(len, GFP_KERNEL);
1980 if (!sa) {
1981 err = -ENOMEM;
0157f60c 1982 goto errout;
70f8e78e
DM		 1983 }
1984 sa->sa_family = dev->type;
da5e0494 1985 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1986 dev->addr_len);
e7c3273e 1987 err = dev_set_mac_address(dev, sa);
70f8e78e 1988 kfree(sa);
1da177e4 1989 if (err)
0157f60c 1990 goto errout;
90c325e3 1991 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1992 }
1993
da5e0494
TG		 1994 if (tb[IFLA_MTU]) {
1995 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1996 if (err < 0)
0157f60c 1997 goto errout;
90c325e3 1998 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1999 }
2000
cbda10fa
VD		 2001 if (tb[IFLA_GROUP]) {
2002 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 2003 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 2004 }
2005
da5e0494
TG		 2006 /*
2007 * Interface selected by interface index but interface
2008 * name provided implies that a name change has been
2009 * requested.
2010 */
51055be8 2011 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2012 err = dev_change_name(dev, ifname);
2013 if (err < 0)
0157f60c 2014 goto errout;
90c325e3 2015 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2016 }
2017
0b815a1a
SH		 2018 if (tb[IFLA_IFALIAS]) {
2019 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2020 nla_len(tb[IFLA_IFALIAS]));
2021 if (err < 0)
2022 goto errout;
ba998906 2023 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2024 }
2025
da5e0494
TG		 2026 if (tb[IFLA_BROADCAST]) {
2027 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2028 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2029 }
2030
83b496e9 2031 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 2032 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 2033 if (err < 0)
2034 goto errout;
83b496e9 2035 }
1da177e4 2036
fbaec0ea
JP		 2037 if (tb[IFLA_MASTER]) {
2038 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2039 if (err)
2040 goto errout;
90c325e3 2041 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2042 }
2043
9a57247f
JP		 2044 if (tb[IFLA_CARRIER]) {
2045 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2046 if (err)
2047 goto errout;
90c325e3 2048 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2049 }
2050
5d1180fc
ND		 2051 if (tb[IFLA_TXQLEN]) {
2052 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
08294a26
JW		 2053 unsigned long orig_len = dev->tx_queue_len;
2054
2055 if (dev->tx_queue_len ^ value) {
2056 dev->tx_queue_len = value;
2057 err = call_netdevice_notifiers(
2058 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2059 err = notifier_to_errno(err);
2060 if (err) {
2061 dev->tx_queue_len = orig_len;
2062 goto errout;
2063 }
ba998906 2064 status |= DO_SETLINK_NOTIFY;
08294a26 2065 }
5d1180fc 2066 }
b00055aa 2067
da5e0494 2068 if (tb[IFLA_OPERSTATE])
93b2d4a2 2069 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2070
da5e0494 2071 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2072 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2073
93b2d4a2 2074 write_lock_bh(&dev_base_lock);
1889b0e7 2075 if (dev->link_mode ^ value)
ba998906 2076 status |= DO_SETLINK_NOTIFY;
1889b0e7 2077 dev->link_mode = value;
93b2d4a2 2078 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 2079 }
2080
c02db8c6 2081 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2082 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2083 struct nlattr *attr;
2084 int rem;
4f7d2cdf 2085
c02db8c6 2086 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2087 if (nla_type(attr) != IFLA_VF_INFO ||
2088 nla_len(attr) < NLA_HDRLEN) {
253683bb 2089 err = -EINVAL;
c02db8c6 2090 goto errout;
253683bb 2091 }
4f7d2cdf 2092 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
fceb6435 2093 ifla_vf_policy, NULL);
4f7d2cdf
DB		 2094 if (err < 0)
2095 goto errout;
2096 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2097 if (err < 0)
2098 goto errout;
ba998906 2099 status |= DO_SETLINK_NOTIFY;
c02db8c6 2100 }
ebc08a6f 2101 }
1da177e4
LT		 2102 err = 0;
2103
57b61080
SF		 2104 if (tb[IFLA_VF_PORTS]) {
2105 struct nlattr *port[IFLA_PORT_MAX+1];
2106 struct nlattr *attr;
2107 int vf;
2108 int rem;
2109
2110 err = -EOPNOTSUPP;
2111 if (!ops->ndo_set_vf_port)
2112 goto errout;
2113
2114 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2115 if (nla_type(attr) != IFLA_VF_PORT ||
2116 nla_len(attr) < NLA_HDRLEN) {
2117 err = -EINVAL;
2118 goto errout;
2119 }
2120 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
fceb6435 2121 ifla_port_policy, NULL);
57b61080
SF		 2122 if (err < 0)
2123 goto errout;
2124 if (!port[IFLA_PORT_VF]) {
2125 err = -EOPNOTSUPP;
2126 goto errout;
2127 }
2128 vf = nla_get_u32(port[IFLA_PORT_VF]);
2129 err = ops->ndo_set_vf_port(dev, vf, port);
2130 if (err < 0)
2131 goto errout;
ba998906 2132 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2133 }
2134 }
2135 err = 0;
2136
2137 if (tb[IFLA_PORT_SELF]) {
2138 struct nlattr *port[IFLA_PORT_MAX+1];
2139
2140 err = nla_parse_nested(port, IFLA_PORT_MAX,
fceb6435
JB		 2141 tb[IFLA_PORT_SELF], ifla_port_policy,
2142 NULL);
57b61080
SF		 2143 if (err < 0)
2144 goto errout;
2145
2146 err = -EOPNOTSUPP;
2147 if (ops->ndo_set_vf_port)
2148 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2149 if (err < 0)
2150 goto errout;
ba998906 2151 status |= DO_SETLINK_NOTIFY;
57b61080 2152 }
f8ff182c
TG		 2153
2154 if (tb[IFLA_AF_SPEC]) {
2155 struct nlattr *af;
2156 int rem;
2157
2158 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2159 const struct rtnl_af_ops *af_ops;
2160
2161 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2162 BUG();
f8ff182c 2163
cf7afbfe 2164 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 2165 if (err < 0)
2166 goto errout;
2167
ba998906 2168 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2169 }
2170 }
57b61080
SF		 2171 err = 0;
2172
88d6378b
AK		 2173 if (tb[IFLA_PROTO_DOWN]) {
2174 err = dev_change_proto_down(dev,
2175 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2176 if (err)
2177 goto errout;
2178 status |= DO_SETLINK_NOTIFY;
2179 }
2180
d1fdd913
BB		 2181 if (tb[IFLA_XDP]) {
2182 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 2183 u32 xdp_flags = 0;
d1fdd913
BB		 2184
2185 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
fceb6435 2186 ifla_xdp_policy, NULL);
d1fdd913
BB		 2187 if (err < 0)
2188 goto errout;
2189
262d8625
BB		 2190 if (xdp[IFLA_XDP_ATTACHED]) {
2191 err = -EINVAL;
2192 goto errout;
2193 }
85de8576
DB		 2194
2195 if (xdp[IFLA_XDP_FLAGS]) {
2196 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2197 if (xdp_flags & ~XDP_FLAGS_MASK) {
2198 err = -EINVAL;
2199 goto errout;
2200 }
0489df9a
DB		 2201 if ((xdp_flags & XDP_FLAGS_SKB_MODE) &&
2202 (xdp_flags & XDP_FLAGS_DRV_MODE)) {
2203 err = -EINVAL;
2204 goto errout;
2205 }
85de8576
DB		 2206 }
2207
d1fdd913 2208 if (xdp[IFLA_XDP_FD]) {
ddf9f970 2209 err = dev_change_xdp_fd(dev, extack,
85de8576
DB		 2210 nla_get_s32(xdp[IFLA_XDP_FD]),
2211 xdp_flags);
d1fdd913
BB		 2212 if (err)
2213 goto errout;
2214 status |= DO_SETLINK_NOTIFY;
2215 }
2216 }
2217
0157f60c 2218errout:
ba998906
ND		 2219 if (status & DO_SETLINK_MODIFIED) {
2220 if (status & DO_SETLINK_NOTIFY)
2221 netdev_state_change(dev);
2222
2223 if (err < 0)
2224 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",
2225 dev->name);
2226 }
da5e0494 2227
0157f60c
PM		 2228 return err;
2229}
1da177e4 2230
c21ef3e3
DA		 2231static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2232 struct netlink_ext_ack *extack)
0157f60c 2233{
3b1e0a65 2234 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2235 struct ifinfomsg *ifm;
2236 struct net_device *dev;
2237 int err;
2238 struct nlattr *tb[IFLA_MAX+1];
2239 char ifname[IFNAMSIZ];
2240
c21ef3e3
DA		 2241 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2242 extack);
0157f60c
PM		 2243 if (err < 0)
2244 goto errout;
2245
2246 if (tb[IFLA_IFNAME])
2247 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2248 else
2249 ifname[0] = '\0';
2250
2251 err = -EINVAL;
2252 ifm = nlmsg_data(nlh);
2253 if (ifm->ifi_index > 0)
a3d12891 2254 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2255 else if (tb[IFLA_IFNAME])
a3d12891 2256 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2257 else
2258 goto errout;
2259
2260 if (dev == NULL) {
2261 err = -ENODEV;
2262 goto errout;
2263 }
2264
e0d087af
ED		 2265 err = validate_linkmsg(dev, tb);
2266 if (err < 0)
a3d12891 2267 goto errout;
0157f60c 2268
ddf9f970 2269 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
da5e0494 2270errout:
1da177e4
LT		 2271 return err;
2272}
2273
66400d54
WC		 2274static int rtnl_group_dellink(const struct net *net, int group)
2275{
2276 struct net_device *dev, *aux;
2277 LIST_HEAD(list_kill);
2278 bool found = false;
2279
2280 if (!group)
2281 return -EPERM;
2282
2283 for_each_netdev(net, dev) {
2284 if (dev->group == group) {
2285 const struct rtnl_link_ops *ops;
2286
2287 found = true;
2288 ops = dev->rtnl_link_ops;
2289 if (!ops || !ops->dellink)
2290 return -EOPNOTSUPP;
2291 }
2292 }
2293
2294 if (!found)
2295 return -ENODEV;
2296
2297 for_each_netdev_safe(net, dev, aux) {
2298 if (dev->group == group) {
2299 const struct rtnl_link_ops *ops;
2300
2301 ops = dev->rtnl_link_ops;
2302 ops->dellink(dev, &list_kill);
2303 }
2304 }
2305 unregister_netdevice_many(&list_kill);
2306
2307 return 0;
2308}
2309
614732ea
TG		 2310int rtnl_delete_link(struct net_device *dev)
2311{
2312 const struct rtnl_link_ops *ops;
2313 LIST_HEAD(list_kill);
2314
2315 ops = dev->rtnl_link_ops;
2316 if (!ops || !ops->dellink)
2317 return -EOPNOTSUPP;
2318
2319 ops->dellink(dev, &list_kill);
2320 unregister_netdevice_many(&list_kill);
2321
2322 return 0;
2323}
2324EXPORT_SYMBOL_GPL(rtnl_delete_link);
2325
c21ef3e3
DA		 2326static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2327 struct netlink_ext_ack *extack)
38f7b870 2328{
3b1e0a65 2329 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2330 struct net_device *dev;
2331 struct ifinfomsg *ifm;
2332 char ifname[IFNAMSIZ];
2333 struct nlattr *tb[IFLA_MAX+1];
2334 int err;
2335
c21ef3e3 2336 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2337 if (err < 0)
2338 return err;
2339
2340 if (tb[IFLA_IFNAME])
2341 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2342
2343 ifm = nlmsg_data(nlh);
2344 if (ifm->ifi_index > 0)
881d966b 2345 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2346 else if (tb[IFLA_IFNAME])
881d966b 2347 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2348 else if (tb[IFLA_GROUP])
2349 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2350 else
2351 return -EINVAL;
2352
2353 if (!dev)
2354 return -ENODEV;
2355
614732ea 2356 return rtnl_delete_link(dev);
38f7b870
PM		 2357}
2358
3729d502
PM		 2359int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2360{
2361 unsigned int old_flags;
2362 int err;
2363
2364 old_flags = dev->flags;
2365 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2366 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2367 if (err < 0)
2368 return err;
2369 }
2370
2371 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2372
a528c219 2373 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2374 return 0;
2375}
2376EXPORT_SYMBOL(rtnl_configure_link);
2377
c0713563 2378struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2379 const char *ifname, unsigned char name_assign_type,
5517750f 2380 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288 2381{
e7199288 2382 struct net_device *dev;
d40156aa
JP		 2383 unsigned int num_tx_queues = 1;
2384 unsigned int num_rx_queues = 1;
e7199288 2385
76ff5cc9
JP		 2386 if (tb[IFLA_NUM_TX_QUEUES])
2387 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2388 else if (ops->get_num_tx_queues)
d40156aa 2389 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2390
2391 if (tb[IFLA_NUM_RX_QUEUES])
2392 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2393 else if (ops->get_num_rx_queues)
d40156aa 2394 num_rx_queues = ops->get_num_rx_queues();
efacb309 2395
5517750f 2396 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2397 ops->setup, num_tx_queues, num_rx_queues);
e7199288 2398 if (!dev)
d1892e4e 2399 return ERR_PTR(-ENOMEM);
e7199288 2400
81adee47
EB		 2401 dev_net_set(dev, net);
2402 dev->rtnl_link_ops = ops;
3729d502 2403 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2404
e7199288
PE		 2405 if (tb[IFLA_MTU])
2406 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2407 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2408 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2409 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2410 dev->addr_assign_type = NET_ADDR_SET;
2411 }
e7199288
PE		 2412 if (tb[IFLA_BROADCAST])
2413 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2414 nla_len(tb[IFLA_BROADCAST]));
2415 if (tb[IFLA_TXQLEN])
2416 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2417 if (tb[IFLA_OPERSTATE])
93b2d4a2 2418 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2419 if (tb[IFLA_LINKMODE])
2420 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2421 if (tb[IFLA_GROUP])
2422 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2423
2424 return dev;
e7199288 2425}
e0d087af 2426EXPORT_SYMBOL(rtnl_create_link);
e7199288 2427
90f62cf3
EB		 2428static int rtnl_group_changelink(const struct sk_buff *skb,
2429 struct net *net, int group,
e7ed828f 2430 struct ifinfomsg *ifm,
ddf9f970 2431 struct netlink_ext_ack *extack,
e7ed828f
VD		 2432 struct nlattr **tb)
2433{
d079535d 2434 struct net_device *dev, *aux;
e7ed828f
VD		 2435 int err;
2436
d079535d 2437 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2438 if (dev->group == group) {
ddf9f970 2439 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
e7ed828f
VD		 2440 if (err < 0)
2441 return err;
2442 }
2443 }
2444
2445 return 0;
2446}
2447
c21ef3e3
DA		 2448static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2449 struct netlink_ext_ack *extack)
38f7b870 2450{
3b1e0a65 2451 struct net *net = sock_net(skb->sk);
38f7b870 2452 const struct rtnl_link_ops *ops;
ba7d49b1 2453 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2454 struct net_device *dev;
ba7d49b1 2455 struct net_device *master_dev = NULL;
38f7b870
PM		 2456 struct ifinfomsg *ifm;
2457 char kind[MODULE_NAME_LEN];
2458 char ifname[IFNAMSIZ];
2459 struct nlattr *tb[IFLA_MAX+1];
2460 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2461 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2462 int err;
2463
95a5afca 2464#ifdef CONFIG_MODULES
38f7b870 2465replay:
8072f085 2466#endif
c21ef3e3 2467 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2468 if (err < 0)
2469 return err;
2470
2471 if (tb[IFLA_IFNAME])
2472 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2473 else
2474 ifname[0] = '\0';
2475
2476 ifm = nlmsg_data(nlh);
2477 if (ifm->ifi_index > 0)
881d966b 2478 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2479 else {
2480 if (ifname[0])
2481 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2482 else
2483 dev = NULL;
2484 }
38f7b870 2485
ba7d49b1
JP		 2486 if (dev) {
2487 master_dev = netdev_master_upper_dev_get(dev);
2488 if (master_dev)
2489 m_ops = master_dev->rtnl_link_ops;
2490 }
2491
e0d087af
ED		 2492 err = validate_linkmsg(dev, tb);
2493 if (err < 0)
1840bb13
TG		 2494 return err;
2495
38f7b870
PM		 2496 if (tb[IFLA_LINKINFO]) {
2497 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
fceb6435
JB		 2498 tb[IFLA_LINKINFO], ifla_info_policy,
2499 NULL);
38f7b870
PM		 2500 if (err < 0)
2501 return err;
2502 } else
2503 memset(linkinfo, 0, sizeof(linkinfo));
2504
2505 if (linkinfo[IFLA_INFO_KIND]) {
2506 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2507 ops = rtnl_link_ops_get(kind);
2508 } else {
2509 kind[0] = '\0';
2510 ops = NULL;
2511 }
2512
2513 if (1) {
4e10fd5b
SL		 2514 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2515 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2516 struct nlattr **data = NULL;
2517 struct nlattr **slave_data = NULL;
317f4810 2518 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2519
2520 if (ops) {
2521 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2522 err = nla_parse_nested(attr, ops->maxtype,
2523 linkinfo[IFLA_INFO_DATA],
fceb6435 2524 ops->policy, NULL);
38f7b870
PM		 2525 if (err < 0)
2526 return err;
2527 data = attr;
2528 }
2529 if (ops->validate) {
2530 err = ops->validate(tb, data);
2531 if (err < 0)
2532 return err;
2533 }
2534 }
2535
ba7d49b1
JP		 2536 if (m_ops) {
2537 if (m_ops->slave_maxtype &&
2538 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2539 err = nla_parse_nested(slave_attr,
2540 m_ops->slave_maxtype,
2541 linkinfo[IFLA_INFO_SLAVE_DATA],
fceb6435
JB		 2542 m_ops->slave_policy,
2543 NULL);
ba7d49b1
JP		 2544 if (err < 0)
2545 return err;
2546 slave_data = slave_attr;
2547 }
2548 if (m_ops->slave_validate) {
2549 err = m_ops->slave_validate(tb, slave_data);
2550 if (err < 0)
2551 return err;
2552 }
2553 }
2554
38f7b870 2555 if (dev) {
90c325e3 2556 int status = 0;
38f7b870
PM		 2557
2558 if (nlh->nlmsg_flags & NLM_F_EXCL)
2559 return -EEXIST;
2560 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2561 return -EOPNOTSUPP;
2562
2563 if (linkinfo[IFLA_INFO_DATA]) {
2564 if (!ops || ops != dev->rtnl_link_ops ||
2565 !ops->changelink)
2566 return -EOPNOTSUPP;
2567
2568 err = ops->changelink(dev, tb, data);
2569 if (err < 0)
2570 return err;
ba998906 2571 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2572 }
2573
ba7d49b1
JP		 2574 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2575 if (!m_ops || !m_ops->slave_changelink)
2576 return -EOPNOTSUPP;
2577
2578 err = m_ops->slave_changelink(master_dev, dev,
2579 tb, slave_data);
2580 if (err < 0)
2581 return err;
ba998906 2582 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2583 }
2584
ddf9f970
JK		 2585 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2586 status);
38f7b870
PM		 2587 }
2588
ffa934f1
PM		 2589 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2590 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2591 return rtnl_group_changelink(skb, net,
ffa934f1 2592 nla_get_u32(tb[IFLA_GROUP]),
ddf9f970 2593 ifm, extack, tb);
38f7b870 2594 return -ENODEV;
ffa934f1 2595 }
38f7b870 2596
160ca014 2597 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
38f7b870
PM		 2598 return -EOPNOTSUPP;
2599
2600 if (!ops) {
95a5afca 2601#ifdef CONFIG_MODULES
38f7b870
PM		 2602 if (kind[0]) {
2603 __rtnl_unlock();
2604 request_module("rtnl-link-%s", kind);
2605 rtnl_lock();
2606 ops = rtnl_link_ops_get(kind);
2607 if (ops)
2608 goto replay;
2609 }
2610#endif
2611 return -EOPNOTSUPP;
2612 }
2613
b0ab2fab
JP		 2614 if (!ops->setup)
2615 return -EOPNOTSUPP;
2616
5517750f 2617 if (!ifname[0]) {
38f7b870 2618 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2619 name_assign_type = NET_NAME_ENUM;
2620 }
e7199288 2621
81adee47 2622 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2623 if (IS_ERR(dest_net))
2624 return PTR_ERR(dest_net);
2625
505ce415
EB		 2626 err = -EPERM;
2627 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2628 goto out;
2629
317f4810
ND		 2630 if (tb[IFLA_LINK_NETNSID]) {
2631 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2632
2633 link_net = get_net_ns_by_id(dest_net, id);
2634 if (!link_net) {
2635 err = -EINVAL;
2636 goto out;
2637 }
06615bed
EB		 2638 err = -EPERM;
2639 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2640 goto out;
317f4810
ND		 2641 }
2642
2643 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2644 name_assign_type, ops, tb);
9c7dafbf 2645 if (IS_ERR(dev)) {
e7199288 2646 err = PTR_ERR(dev);
9c7dafbf
PE		 2647 goto out;
2648 }
2649
2650 dev->ifindex = ifm->ifi_index;
2651
0e0eee24 2652 if (ops->newlink) {
7b4ce694 2653 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2654 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2655 * and unregister it on failure after registration
2656 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2657 */
e51fb152
CW		 2658 if (err < 0) {
2659 /* If device is not registered at all, free it now */
2660 if (dev->reg_state == NETREG_UNINITIALIZED)
2661 free_netdev(dev);
0e0eee24 2662 goto out;
e51fb152 2663 }
0e0eee24 2664 } else {
2d85cba2 2665 err = register_netdevice(dev);
0e0eee24
CW		 2666 if (err < 0) {
2667 free_netdev(dev);
2668 goto out;
2669 }
fce9b9be 2670 }
3729d502 2671 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2672 if (err < 0)
2673 goto out_unregister;
bdef279b 2674 if (link_net) {
317f4810 2675 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2676 if (err < 0)
43638900 2677 goto out_unregister;
bdef279b 2678 }
160ca014
TV		 2679 if (tb[IFLA_MASTER]) {
2680 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2681 if (err)
2682 goto out_unregister;
2683 }
3729d502 2684out:
317f4810
ND		 2685 if (link_net)
2686 put_net(link_net);
81adee47 2687 put_net(dest_net);
38f7b870 2688 return err;
43638900
DM		 2689out_unregister:
2690 if (ops->newlink) {
2691 LIST_HEAD(list_kill);
2692
2693 ops->dellink(dev, &list_kill);
2694 unregister_netdevice_many(&list_kill);
2695 } else {
2696 unregister_netdevice(dev);
2697 }
2698 goto out;
38f7b870
PM		 2699 }
2700}
2701
c21ef3e3
DA		 2702static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2703 struct netlink_ext_ack *extack)
711e2c33 2704{
3b1e0a65 2705 struct net *net = sock_net(skb->sk);
b60c5115 2706 struct ifinfomsg *ifm;
a3d12891 2707 char ifname[IFNAMSIZ];
b60c5115
TG		 2708 struct nlattr *tb[IFLA_MAX+1];
2709 struct net_device *dev = NULL;
2710 struct sk_buff *nskb;
339bf98f 2711 int err;
115c9b81 2712 u32 ext_filter_mask = 0;
711e2c33 2713
c21ef3e3 2714 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
b60c5115 2715 if (err < 0)
9918f230 2716 return err;
b60c5115 2717
a3d12891
ED		 2718 if (tb[IFLA_IFNAME])
2719 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2720
115c9b81
GR		 2721 if (tb[IFLA_EXT_MASK])
2722 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2723
b60c5115 2724 ifm = nlmsg_data(nlh);
a3d12891
ED		 2725 if (ifm->ifi_index > 0)
2726 dev = __dev_get_by_index(net, ifm->ifi_index);
2727 else if (tb[IFLA_IFNAME])
2728 dev = __dev_get_by_name(net, ifname);
2729 else
711e2c33 2730 return -EINVAL;
711e2c33 2731
a3d12891
ED		 2732 if (dev == NULL)
2733 return -ENODEV;
2734
115c9b81 2735 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2736 if (nskb == NULL)
2737 return -ENOBUFS;
b60c5115 2738
15e47304 2739 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
bf74b20d 2740 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2741 if (err < 0) {
2742 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2743 WARN_ON(err == -EMSGSIZE);
2744 kfree_skb(nskb);
a3d12891 2745 } else
15e47304 2746 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2747
b60c5115 2748 return err;
711e2c33 2749}
711e2c33 2750
115c9b81 2751static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2752{
115c9b81
GR		 2753 struct net *net = sock_net(skb->sk);
2754 struct net_device *dev;
2755 struct nlattr *tb[IFLA_MAX+1];
2756 u32 ext_filter_mask = 0;
2757 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2758 int hdrlen;
2759
2760 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2761 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2762 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2763
fceb6435 2764 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
a4b64fbe
ED		 2765 if (tb[IFLA_EXT_MASK])
2766 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2767 }
115c9b81
GR		 2768
2769 if (!ext_filter_mask)
2770 return NLMSG_GOODSIZE;
2771 /*
2772 * traverse the list of net devices and compute the minimum
2773 * buffer size based upon the filter mask.
2774 */
2775 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2776 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2777 if_nlmsg_size(dev,
2778 ext_filter_mask));
2779 }
2780
93af2056 2781 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 2782}
2783
42bad1da 2784static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2785{
2786 int idx;
2787 int s_idx = cb->family;
2788
2789 if (s_idx == 0)
2790 s_idx = 1;
25239cee 2791 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2792 int type = cb->nlh->nlmsg_type-RTM_BASE;
2793 if (idx < s_idx || idx == PF_PACKET)
2794 continue;
e2849863
TG		 2795 if (rtnl_msg_handlers[idx] == NULL ||
2796 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2797 continue;
0465277f 2798 if (idx > s_idx) {
1da177e4 2799 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2800 cb->prev_seq = 0;
2801 cb->seq = 0;
2802 }
e2849863 2803 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2804 break;
2805 }
2806 cb->family = idx;
2807
2808 return skb->len;
2809}
2810
395eea6c 2811struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
bf74b20d 2812 unsigned int change, gfp_t flags)
1da177e4 2813{
c346dca1 2814 struct net *net = dev_net(dev);
1da177e4 2815 struct sk_buff *skb;
0ec6d3f4 2816 int err = -ENOBUFS;
c7ac8679 2817 size_t if_info_size;
1da177e4 2818
7f294054 2819 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2820 if (skb == NULL)
2821 goto errout;
1da177e4 2822
bf74b20d 2823 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2824 if (err < 0) {
2825 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2826 WARN_ON(err == -EMSGSIZE);
2827 kfree_skb(skb);
2828 goto errout;
2829 }
395eea6c 2830 return skb;
0ec6d3f4
TG		 2831errout:
2832 if (err < 0)
4b3da706 2833 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2834 return NULL;
2835}
2836
2837void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2838{
2839 struct net *net = dev_net(dev);
2840
2841 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2842}
2843
bf74b20d
DM		 2844void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2845 gfp_t flags)
395eea6c
MB		 2846{
2847 struct sk_buff *skb;
2848
ed2a80ab
ND		 2849 if (dev->reg_state != NETREG_REGISTERED)
2850 return;
2851
bf74b20d 2852 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
395eea6c
MB		 2853 if (skb)
2854 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2855}
471cb5a3 2856EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2857
d83b0603
JF		 2858static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2859 struct net_device *dev,
1e53d5bb 2860 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2861 int type, unsigned int flags,
b3379041 2862 int nlflags, u16 ndm_state)
d83b0603
JF		 2863{
2864 struct nlmsghdr *nlh;
2865 struct ndmsg *ndm;
2866
1c104a6b 2867 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2868 if (!nlh)
2869 return -EMSGSIZE;
2870
2871 ndm = nlmsg_data(nlh);
2872 ndm->ndm_family = AF_BRIDGE;
2873 ndm->ndm_pad1 = 0;
2874 ndm->ndm_pad2 = 0;
2875 ndm->ndm_flags = flags;
2876 ndm->ndm_type = 0;
2877 ndm->ndm_ifindex = dev->ifindex;
b3379041 2878 ndm->ndm_state = ndm_state;
d83b0603
JF		 2879
2880 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2881 goto nla_put_failure;
1e53d5bb
HS		 2882 if (vid)
2883 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2884 goto nla_put_failure;
d83b0603 2885
053c095a
JB		 2886 nlmsg_end(skb, nlh);
2887 return 0;
d83b0603
JF		 2888
2889nla_put_failure:
2890 nlmsg_cancel(skb, nlh);
2891 return -EMSGSIZE;
2892}
2893
3ff661c3
JF		 2894static inline size_t rtnl_fdb_nlmsg_size(void)
2895{
f82ef3e1
SD		 2896 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2897 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2898 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2899 0;
3ff661c3
JF		 2900}
2901
b3379041
HS		 2902static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2903 u16 ndm_state)
3ff661c3
JF		 2904{
2905 struct net *net = dev_net(dev);
2906 struct sk_buff *skb;
2907 int err = -ENOBUFS;
2908
2909 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2910 if (!skb)
2911 goto errout;
2912
1e53d5bb 2913 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2914 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2915 if (err < 0) {
2916 kfree_skb(skb);
2917 goto errout;
2918 }
2919
2920 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2921 return;
2922errout:
2923 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2924}
2925
090096bf
VY		 2926/**
2927 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2928 */
2929int ndo_dflt_fdb_add(struct ndmsg *ndm,
2930 struct nlattr *tb[],
2931 struct net_device *dev,
f6f6424b 2932 const unsigned char *addr, u16 vid,
090096bf
VY		 2933 u16 flags)
2934{
2935 int err = -EINVAL;
2936
2937 /* If aging addresses are supported device will need to
2938 * implement its own handler for this.
2939 */
2940 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2941 pr_info("%s: FDB only supports static addresses\n", dev->name);
2942 return err;
2943 }
2944
65891fea
OG		 2945 if (vid) {
2946 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2947 return err;
2948 }
2949
090096bf
VY		 2950 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2951 err = dev_uc_add_excl(dev, addr);
2952 else if (is_multicast_ether_addr(addr))
2953 err = dev_mc_add_excl(dev, addr);
2954
2955 /* Only return duplicate errors if NLM_F_EXCL is set */
2956 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2957 err = 0;
2958
2959 return err;
2960}
2961EXPORT_SYMBOL(ndo_dflt_fdb_add);
2962
f6f6424b
JP		 2963static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2964{
2965 u16 vid = 0;
2966
2967 if (vlan_attr) {
2968 if (nla_len(vlan_attr) != sizeof(u16)) {
2969 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2970 return -EINVAL;
2971 }
2972
2973 vid = nla_get_u16(vlan_attr);
2974
2975 if (!vid || vid >= VLAN_VID_MASK) {
2976 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2977 vid);
2978 return -EINVAL;
2979 }
2980 }
2981 *p_vid = vid;
2982 return 0;
2983}
2984
c21ef3e3
DA		 2985static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
2986 struct netlink_ext_ack *extack)
77162022
JF		 2987{
2988 struct net *net = sock_net(skb->sk);
77162022
JF		 2989 struct ndmsg *ndm;
2990 struct nlattr *tb[NDA_MAX+1];
2991 struct net_device *dev;
2992 u8 *addr;
f6f6424b 2993 u16 vid;
77162022
JF		 2994 int err;
2995
c21ef3e3 2996 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
77162022
JF		 2997 if (err < 0)
2998 return err;
2999
3000 ndm = nlmsg_data(nlh);
3001 if (ndm->ndm_ifindex == 0) {
3002 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
3003 return -EINVAL;
3004 }
3005
3006 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3007 if (dev == NULL) {
3008 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
3009 return -ENODEV;
3010 }
3011
3012 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3013 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
3014 return -EINVAL;
3015 }
3016
3017 addr = nla_data(tb[NDA_LLADDR]);
77162022 3018
f6f6424b
JP		 3019 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3020 if (err)
3021 return err;
3022
77162022
JF		 3023 err = -EOPNOTSUPP;
3024
3025 /* Support fdb on master device the net/bridge default case */
3026 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3027 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3028 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3029 const struct net_device_ops *ops = br_dev->netdev_ops;
3030
f6f6424b
JP		 3031 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3032 nlh->nlmsg_flags);
77162022
JF		 3033 if (err)
3034 goto out;
3035 else
3036 ndm->ndm_flags &= ~NTF_MASTER;
3037 }
3038
3039 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3040 if ((ndm->ndm_flags & NTF_SELF)) {
3041 if (dev->netdev_ops->ndo_fdb_add)
3042 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 3043 vid,
090096bf
VY		 3044 nlh->nlmsg_flags);
3045 else
f6f6424b 3046 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 3047 nlh->nlmsg_flags);
77162022 3048
3ff661c3 3049 if (!err) {
b3379041
HS		 3050 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3051 ndm->ndm_state);
77162022 3052 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3053 }
77162022
JF		 3054 }
3055out:
3056 return err;
3057}
3058
090096bf
VY		 3059/**
3060 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3061 */
3062int ndo_dflt_fdb_del(struct ndmsg *ndm,
3063 struct nlattr *tb[],
3064 struct net_device *dev,
f6f6424b 3065 const unsigned char *addr, u16 vid)
090096bf 3066{
c8a89c4a 3067 int err = -EINVAL;
090096bf
VY		 3068
3069 /* If aging addresses are supported device will need to
3070 * implement its own handler for this.
3071 */
64535993 3072 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 3073 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 3074 return err;
090096bf
VY		 3075 }
3076
3077 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3078 err = dev_uc_del(dev, addr);
3079 else if (is_multicast_ether_addr(addr))
3080 err = dev_mc_del(dev, addr);
090096bf
VY		 3081
3082 return err;
3083}
3084EXPORT_SYMBOL(ndo_dflt_fdb_del);
3085
c21ef3e3
DA		 3086static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3087 struct netlink_ext_ack *extack)
77162022
JF		 3088{
3089 struct net *net = sock_net(skb->sk);
3090 struct ndmsg *ndm;
1690be63 3091 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 3092 struct net_device *dev;
3093 int err = -EINVAL;
3094 __u8 *addr;
f6f6424b 3095 u16 vid;
77162022 3096
90f62cf3 3097 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 3098 return -EPERM;
3099
c21ef3e3 3100 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
1690be63
VY		 3101 if (err < 0)
3102 return err;
77162022
JF		 3103
3104 ndm = nlmsg_data(nlh);
3105 if (ndm->ndm_ifindex == 0) {
3106 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3107 return -EINVAL;
3108 }
3109
3110 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3111 if (dev == NULL) {
3112 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3113 return -ENODEV;
3114 }
3115
1690be63
VY		 3116 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3117 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3118 return -EINVAL;
3119 }
3120
3121 addr = nla_data(tb[NDA_LLADDR]);
77162022 3122
f6f6424b
JP		 3123 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3124 if (err)
3125 return err;
3126
77162022
JF		 3127 err = -EOPNOTSUPP;
3128
3129 /* Support fdb on master device the net/bridge default case */
3130 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3131 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3132 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3133 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 3134
898e5061 3135 if (ops->ndo_fdb_del)
f6f6424b 3136 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 3137
3138 if (err)
3139 goto out;
3140 else
3141 ndm->ndm_flags &= ~NTF_MASTER;
3142 }
3143
3144 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3145 if (ndm->ndm_flags & NTF_SELF) {
3146 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 3147 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3148 vid);
090096bf 3149 else
f6f6424b 3150 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 3151
3ff661c3 3152 if (!err) {
b3379041
HS		 3153 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3154 ndm->ndm_state);
77162022 3155 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3156 }
77162022
JF		 3157 }
3158out:
3159 return err;
3160}
3161
d83b0603
JF		 3162static int nlmsg_populate_fdb(struct sk_buff *skb,
3163 struct netlink_callback *cb,
3164 struct net_device *dev,
3165 int *idx,
3166 struct netdev_hw_addr_list *list)
3167{
3168 struct netdev_hw_addr *ha;
3169 int err;
15e47304 3170 u32 portid, seq;
d83b0603 3171
15e47304 3172 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 3173 seq = cb->nlh->nlmsg_seq;
3174
3175 list_for_each_entry(ha, &list->list, list) {
d297653d 3176 if (*idx < cb->args[2])
d83b0603
JF		 3177 goto skip;
3178
1e53d5bb 3179 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 3180 portid, seq,
1c104a6b 3181 RTM_NEWNEIGH, NTF_SELF,
b3379041 3182 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 3183 if (err < 0)
3184 return err;
3185skip:
3186 *idx += 1;
3187 }
3188 return 0;
3189}
3190
3191/**
2c53040f 3192 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 3193 * @nlh: netlink message header
3194 * @dev: netdevice
3195 *
3196 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 3197 * Returns number of addresses from list put in skb.
d83b0603
JF		 3198 */
3199int ndo_dflt_fdb_dump(struct sk_buff *skb,
3200 struct netlink_callback *cb,
3201 struct net_device *dev,
5d5eacb3 3202 struct net_device *filter_dev,
d297653d 3203 int *idx)
d83b0603
JF		 3204{
3205 int err;
3206
3207 netif_addr_lock_bh(dev);
d297653d 3208 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 3209 if (err)
3210 goto out;
2934c9db 3211 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 3212out:
3213 netif_addr_unlock_bh(dev);
d297653d 3214 return err;
d83b0603
JF		 3215}
3216EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3217
77162022
JF		 3218static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3219{
77162022 3220 struct net_device *dev;
5e6d2435 3221 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3222 struct net_device *br_dev = NULL;
3223 const struct net_device_ops *ops = NULL;
3224 const struct net_device_ops *cops = NULL;
3225 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3226 struct net *net = sock_net(skb->sk);
d297653d 3227 struct hlist_head *head;
5e6d2435
JHS		 3228 int brport_idx = 0;
3229 int br_idx = 0;
d297653d
RP		 3230 int h, s_h;
3231 int idx = 0, s_idx;
3232 int err = 0;
3233 int fidx = 0;
5e6d2435 3234
0ff50e83
AP		 3235 err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3236 IFLA_MAX, ifla_policy, NULL);
3237 if (err < 0) {
3238 return -EINVAL;
3239 } else if (err == 0) {
5e6d2435
JHS		 3240 if (tb[IFLA_MASTER])
3241 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3242 }
3243
3244 brport_idx = ifm->ifi_index;
3245
3246 if (br_idx) {
3247 br_dev = __dev_get_by_index(net, br_idx);
3248 if (!br_dev)
3249 return -ENODEV;
3250
3251 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3252 }
3253
d297653d
RP		 3254 s_h = cb->args[0];
3255 s_idx = cb->args[1];
5e6d2435 3256
d297653d
RP		 3257 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3258 idx = 0;
3259 head = &net->dev_index_head[h];
3260 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 3261
d297653d 3262 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 3263 continue;
3264
d297653d
RP		 3265 if (!br_idx) { /* user did not specify a specific bridge */
3266 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3267 br_dev = netdev_master_upper_dev_get(dev);
3268 cops = br_dev->netdev_ops;
3269 }
3270 } else {
3271 if (dev != br_dev &&
3272 !(dev->priv_flags & IFF_BRIDGE_PORT))
3273 continue;
5e6d2435 3274
d297653d
RP		 3275 if (br_dev != netdev_master_upper_dev_get(dev) &&
3276 !(dev->priv_flags & IFF_EBRIDGE))
3277 continue;
3278 cops = ops;
3279 }
77162022 3280
d297653d
RP		 3281 if (idx < s_idx)
3282 goto cont;
77162022 3283
d297653d
RP		 3284 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3285 if (cops && cops->ndo_fdb_dump) {
3286 err = cops->ndo_fdb_dump(skb, cb,
3287 br_dev, dev,
3288 &fidx);
3289 if (err == -EMSGSIZE)
3290 goto out;
3291 }
3292 }
5e6d2435 3293
d297653d
RP		 3294 if (dev->netdev_ops->ndo_fdb_dump)
3295 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3296 dev, NULL,
3297 &fidx);
3298 else
3299 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3300 &fidx);
3301 if (err == -EMSGSIZE)
3302 goto out;
3303
3304 cops = NULL;
3305
3306 /* reset fdb offset to 0 for rest of the interfaces */
3307 cb->args[2] = 0;
3308 fidx = 0;
3309cont:
3310 idx++;
3311 }
77162022 3312 }
77162022 3313
d297653d
RP		 3314out:
3315 cb->args[0] = h;
3316 cb->args[1] = idx;
3317 cb->args[2] = fidx;
3318
77162022
JF		 3319 return skb->len;
3320}
3321
2c3c031c
SF		 3322static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3323 unsigned int attrnum, unsigned int flag)
3324{
3325 if (mask & flag)
3326 return nla_put_u8(skb, attrnum, !!(flags & flag));
3327 return 0;
3328}
3329
815cccbf 3330int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3331 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3332 u32 flags, u32 mask, int nlflags,
3333 u32 filter_mask,
3334 int (*vlan_fill)(struct sk_buff *skb,
3335 struct net_device *dev,
3336 u32 filter_mask))
815cccbf
JF		 3337{
3338 struct nlmsghdr *nlh;
3339 struct ifinfomsg *ifm;
3340 struct nlattr *br_afspec;
2c3c031c 3341 struct nlattr *protinfo;
815cccbf 3342 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3343 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3344 int err = 0;
815cccbf 3345
46c264da 3346 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3347 if (nlh == NULL)
3348 return -EMSGSIZE;
3349
3350 ifm = nlmsg_data(nlh);
3351 ifm->ifi_family = AF_BRIDGE;
3352 ifm->__ifi_pad = 0;
3353 ifm->ifi_type = dev->type;
3354 ifm->ifi_index = dev->ifindex;
3355 ifm->ifi_flags = dev_get_flags(dev);
3356 ifm->ifi_change = 0;
3357
3358
3359 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3360 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3361 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3362 (br_dev &&
3363 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3364 (dev->addr_len &&
3365 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3366 (dev->ifindex != dev_get_iflink(dev) &&
3367 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3368 goto nla_put_failure;
3369
3370 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3371 if (!br_afspec)
3372 goto nla_put_failure;
3373
1d460b98 3374 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3375 nla_nest_cancel(skb, br_afspec);
3376 goto nla_put_failure;
3377 }
1d460b98
RP		 3378
3379 if (mode != BRIDGE_MODE_UNDEF) {
3380 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3381 nla_nest_cancel(skb, br_afspec);
3382 goto nla_put_failure;
3383 }
3384 }
7d4f8d87
SF		 3385 if (vlan_fill) {
3386 err = vlan_fill(skb, dev, filter_mask);
3387 if (err) {
3388 nla_nest_cancel(skb, br_afspec);
3389 goto nla_put_failure;
3390 }
3391 }
815cccbf
JF		 3392 nla_nest_end(skb, br_afspec);
3393
2c3c031c
SF		 3394 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3395 if (!protinfo)
3396 goto nla_put_failure;
3397
3398 if (brport_nla_put_flag(skb, flags, mask,
3399 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3400 brport_nla_put_flag(skb, flags, mask,
3401 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3402 brport_nla_put_flag(skb, flags, mask,
3403 IFLA_BRPORT_FAST_LEAVE,
3404 BR_MULTICAST_FAST_LEAVE) ||
3405 brport_nla_put_flag(skb, flags, mask,
3406 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3407 brport_nla_put_flag(skb, flags, mask,
3408 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3409 brport_nla_put_flag(skb, flags, mask,
3410 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3411 brport_nla_put_flag(skb, flags, mask,
3412 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3413 brport_nla_put_flag(skb, flags, mask,
3414 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3415 nla_nest_cancel(skb, protinfo);
3416 goto nla_put_failure;
3417 }
3418
3419 nla_nest_end(skb, protinfo);
3420
053c095a
JB		 3421 nlmsg_end(skb, nlh);
3422 return 0;
815cccbf
JF		 3423nla_put_failure:
3424 nlmsg_cancel(skb, nlh);
7d4f8d87 3425 return err ? err : -EMSGSIZE;
815cccbf 3426}
7d4f8d87 3427EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3428
e5a55a89
JF		 3429static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3430{
3431 struct net *net = sock_net(skb->sk);
3432 struct net_device *dev;
3433 int idx = 0;
3434 u32 portid = NETLINK_CB(cb->skb).portid;
3435 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3436 u32 filter_mask = 0;
d64f69b0 3437 int err;
6cbdceeb 3438
aa68c20f
TG		 3439 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3440 struct nlattr *extfilt;
3441
3442 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3443 IFLA_EXT_MASK);
3444 if (extfilt) {
3445 if (nla_len(extfilt) < sizeof(filter_mask))
3446 return -EINVAL;
3447
3448 filter_mask = nla_get_u32(extfilt);
3449 }
3450 }
e5a55a89
JF		 3451
3452 rcu_read_lock();
3453 for_each_netdev_rcu(net, dev) {
3454 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3455 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3456
898e5061 3457 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3458 if (idx >= cb->args[0]) {
3459 err = br_dev->netdev_ops->ndo_bridge_getlink(
3460 skb, portid, seq, dev,
3461 filter_mask, NLM_F_MULTI);
f6c5775f
DA		 3462 if (err < 0 && err != -EOPNOTSUPP) {
3463 if (likely(skb->len))
3464 break;
3465
3466 goto out_err;
3467 }
d64f69b0 3468 }
25b1e679 3469 idx++;
e5a55a89
JF		 3470 }
3471
3472 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3473 if (idx >= cb->args[0]) {
3474 err = ops->ndo_bridge_getlink(skb, portid,
3475 seq, dev,
3476 filter_mask,
3477 NLM_F_MULTI);
f6c5775f
DA		 3478 if (err < 0 && err != -EOPNOTSUPP) {
3479 if (likely(skb->len))
3480 break;
3481
3482 goto out_err;
3483 }
d64f69b0 3484 }
25b1e679 3485 idx++;
e5a55a89
JF		 3486 }
3487 }
f6c5775f
DA		 3488 err = skb->len;
3489out_err:
e5a55a89
JF		 3490 rcu_read_unlock();
3491 cb->args[0] = idx;
3492
f6c5775f 3493 return err;
e5a55a89
JF		 3494}
3495
2469ffd7
JF		 3496static inline size_t bridge_nlmsg_size(void)
3497{
3498 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3499 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3500 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3501 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3502 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3503 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3504 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3505 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3506 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3507 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3508 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3509}
3510
02dba438 3511static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3512{
3513 struct net *net = dev_net(dev);
2469ffd7
JF		 3514 struct sk_buff *skb;
3515 int err = -EOPNOTSUPP;
3516
02dba438
RP		 3517 if (!dev->netdev_ops->ndo_bridge_getlink)
3518 return 0;
3519
2469ffd7
JF		 3520 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3521 if (!skb) {
3522 err = -ENOMEM;
3523 goto errout;
3524 }
3525
46c264da 3526 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3527 if (err < 0)
3528 goto errout;
2469ffd7 3529
59ccaaaa
RP		 3530 if (!skb->len)
3531 goto errout;
3532
2469ffd7
JF		 3533 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3534 return 0;
3535errout:
3536 WARN_ON(err == -EMSGSIZE);
3537 kfree_skb(skb);
59ccaaaa
RP		 3538 if (err)
3539 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3540 return err;
3541}
3542
c21ef3e3
DA		 3543static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3544 struct netlink_ext_ack *extack)
e5a55a89
JF		 3545{
3546 struct net *net = sock_net(skb->sk);
3547 struct ifinfomsg *ifm;
3548 struct net_device *dev;
2469ffd7
JF		 3549 struct nlattr *br_spec, *attr = NULL;
3550 int rem, err = -EOPNOTSUPP;
4de8b413 3551 u16 flags = 0;
c38e01b8 3552 bool have_flags = false;
e5a55a89
JF		 3553
3554 if (nlmsg_len(nlh) < sizeof(*ifm))
3555 return -EINVAL;
3556
3557 ifm = nlmsg_data(nlh);
3558 if (ifm->ifi_family != AF_BRIDGE)
3559 return -EPFNOSUPPORT;
3560
3561 dev = __dev_get_by_index(net, ifm->ifi_index);
3562 if (!dev) {
3563 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3564 return -ENODEV;
3565 }
3566
2469ffd7
JF		 3567 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3568 if (br_spec) {
3569 nla_for_each_nested(attr, br_spec, rem) {
3570 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3571 if (nla_len(attr) < sizeof(flags))
3572 return -EINVAL;
3573
c38e01b8 3574 have_flags = true;
2469ffd7
JF		 3575 flags = nla_get_u16(attr);
3576 break;
3577 }
3578 }
3579 }
3580
3581 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3582 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3583
3584 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3585 err = -EOPNOTSUPP;
3586 goto out;
3587 }
3588
add511b3 3589 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3590 if (err)
3591 goto out;
2469ffd7
JF		 3592
3593 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3594 }
3595
2469ffd7
JF		 3596 if ((flags & BRIDGE_FLAGS_SELF)) {
3597 if (!dev->netdev_ops->ndo_bridge_setlink)
3598 err = -EOPNOTSUPP;
3599 else
add511b3
RP		 3600 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3601 flags);
02dba438 3602 if (!err) {
2469ffd7 3603 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3604
3605 /* Generate event to notify upper layer of bridge
3606 * change
3607 */
3608 err = rtnl_bridge_notify(dev);
3609 }
2469ffd7 3610 }
e5a55a89 3611
c38e01b8 3612 if (have_flags)
2469ffd7 3613 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3614out:
3615 return err;
3616}
3617
c21ef3e3
DA		 3618static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3619 struct netlink_ext_ack *extack)
407af329
VY		 3620{
3621 struct net *net = sock_net(skb->sk);
3622 struct ifinfomsg *ifm;
3623 struct net_device *dev;
3624 struct nlattr *br_spec, *attr = NULL;
3625 int rem, err = -EOPNOTSUPP;
4de8b413 3626 u16 flags = 0;
407af329
VY		 3627 bool have_flags = false;
3628
3629 if (nlmsg_len(nlh) < sizeof(*ifm))
3630 return -EINVAL;
3631
3632 ifm = nlmsg_data(nlh);
3633 if (ifm->ifi_family != AF_BRIDGE)
3634 return -EPFNOSUPPORT;
3635
3636 dev = __dev_get_by_index(net, ifm->ifi_index);
3637 if (!dev) {
3638 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3639 return -ENODEV;
3640 }
3641
3642 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3643 if (br_spec) {
3644 nla_for_each_nested(attr, br_spec, rem) {
3645 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3646 if (nla_len(attr) < sizeof(flags))
3647 return -EINVAL;
3648
407af329
VY		 3649 have_flags = true;
3650 flags = nla_get_u16(attr);
3651 break;
3652 }
3653 }
3654 }
3655
407af329
VY		 3656 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3657 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3658
3659 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3660 err = -EOPNOTSUPP;
3661 goto out;
3662 }
3663
add511b3 3664 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3665 if (err)
3666 goto out;
3667
3668 flags &= ~BRIDGE_FLAGS_MASTER;
3669 }
3670
3671 if ((flags & BRIDGE_FLAGS_SELF)) {
3672 if (!dev->netdev_ops->ndo_bridge_dellink)
3673 err = -EOPNOTSUPP;
3674 else
add511b3
RP		 3675 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3676 flags);
407af329 3677
02dba438 3678 if (!err) {
407af329 3679 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3680
3681 /* Generate event to notify upper layer of bridge
3682 * change
3683 */
3684 err = rtnl_bridge_notify(dev);
3685 }
407af329
VY		 3686 }
3687
3688 if (have_flags)
3689 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3690out:
3691 return err;
3692}
3693
e8872a25
NA		 3694static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3695{
3696 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3697 (!idxattr || idxattr == attrid);
3698}
3699
69ae6ad2
NF		 3700#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3701static int rtnl_get_offload_stats_attr_size(int attr_id)
3702{
3703 switch (attr_id) {
3704 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3705 return sizeof(struct rtnl_link_stats64);
3706 }
3707
3708 return 0;
3709}
3710
3711static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3712 int *prividx)
3713{
3714 struct nlattr *attr = NULL;
3715 int attr_id, size;
3716 void *attr_data;
3717 int err;
3718
3719 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3720 dev->netdev_ops->ndo_get_offload_stats))
3721 return -ENODATA;
3722
3723 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3724 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3725 if (attr_id < *prividx)
3726 continue;
3727
3728 size = rtnl_get_offload_stats_attr_size(attr_id);
3729 if (!size)
3730 continue;
3731
3df5b3c6 3732 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 3733 continue;
3734
3735 attr = nla_reserve_64bit(skb, attr_id, size,
3736 IFLA_OFFLOAD_XSTATS_UNSPEC);
3737 if (!attr)
3738 goto nla_put_failure;
3739
3740 attr_data = nla_data(attr);
3741 memset(attr_data, 0, size);
3742 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3743 attr_data);
3744 if (err)
3745 goto get_offload_stats_failure;
3746 }
3747
3748 if (!attr)
3749 return -ENODATA;
3750
3751 *prividx = 0;
3752 return 0;
3753
3754nla_put_failure:
3755 err = -EMSGSIZE;
3756get_offload_stats_failure:
3757 *prividx = attr_id;
3758 return err;
3759}
3760
3761static int rtnl_get_offload_stats_size(const struct net_device *dev)
3762{
3763 int nla_size = 0;
3764 int attr_id;
3765 int size;
3766
3767 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3768 dev->netdev_ops->ndo_get_offload_stats))
3769 return 0;
3770
3771 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3772 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3df5b3c6 3773 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 3774 continue;
3775 size = rtnl_get_offload_stats_attr_size(attr_id);
3776 nla_size += nla_total_size_64bit(size);
3777 }
3778
3779 if (nla_size != 0)
3780 nla_size += nla_total_size(0);
3781
3782 return nla_size;
3783}
3784
10c9ead9
RP		 3785static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3786 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 3787 unsigned int flags, unsigned int filter_mask,
3788 int *idxattr, int *prividx)
10c9ead9
RP		 3789{
3790 struct if_stats_msg *ifsm;
3791 struct nlmsghdr *nlh;
3792 struct nlattr *attr;
e8872a25 3793 int s_prividx = *prividx;
69ae6ad2 3794 int err;
10c9ead9
RP		 3795
3796 ASSERT_RTNL();
3797
3798 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3799 if (!nlh)
3800 return -EMSGSIZE;
3801
3802 ifsm = nlmsg_data(nlh);
3803 ifsm->ifindex = dev->ifindex;
3804 ifsm->filter_mask = filter_mask;
3805
e8872a25 3806 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 3807 struct rtnl_link_stats64 *sp;
10c9ead9 3808
58414d32
ND		 3809 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3810 sizeof(struct rtnl_link_stats64),
3811 IFLA_STATS_UNSPEC);
10c9ead9
RP		 3812 if (!attr)
3813 goto nla_put_failure;
3814
3815 sp = nla_data(attr);
3816 dev_get_stats(dev, sp);
3817 }
3818
97a47fac
NA		 3819 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3820 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3821
3822 if (ops && ops->fill_linkxstats) {
97a47fac
NA		 3823 *idxattr = IFLA_STATS_LINK_XSTATS;
3824 attr = nla_nest_start(skb,
3825 IFLA_STATS_LINK_XSTATS);
3826 if (!attr)
3827 goto nla_put_failure;
3828
80e73cc5
NA		 3829 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3830 nla_nest_end(skb, attr);
3831 if (err)
3832 goto nla_put_failure;
3833 *idxattr = 0;
3834 }
3835 }
3836
3837 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3838 *idxattr)) {
3839 const struct rtnl_link_ops *ops = NULL;
3840 const struct net_device *master;
3841
3842 master = netdev_master_upper_dev_get(dev);
3843 if (master)
3844 ops = master->rtnl_link_ops;
3845 if (ops && ops->fill_linkxstats) {
80e73cc5
NA		 3846 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3847 attr = nla_nest_start(skb,
3848 IFLA_STATS_LINK_XSTATS_SLAVE);
3849 if (!attr)
3850 goto nla_put_failure;
3851
3852 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 3853 nla_nest_end(skb, attr);
3854 if (err)
3855 goto nla_put_failure;
3856 *idxattr = 0;
3857 }
3858 }
3859
69ae6ad2
NF		 3860 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3861 *idxattr)) {
3862 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3863 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3864 if (!attr)
3865 goto nla_put_failure;
3866
3867 err = rtnl_get_offload_stats(skb, dev, prividx);
3868 if (err == -ENODATA)
3869 nla_nest_cancel(skb, attr);
3870 else
3871 nla_nest_end(skb, attr);
3872
3873 if (err && err != -ENODATA)
3874 goto nla_put_failure;
3875 *idxattr = 0;
3876 }
3877
aefb4d4a
RS		 3878 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3879 struct rtnl_af_ops *af_ops;
3880
3881 *idxattr = IFLA_STATS_AF_SPEC;
3882 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3883 if (!attr)
3884 goto nla_put_failure;
3885
3886 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3887 if (af_ops->fill_stats_af) {
3888 struct nlattr *af;
3889 int err;
3890
3891 af = nla_nest_start(skb, af_ops->family);
3892 if (!af)
3893 goto nla_put_failure;
3894
3895 err = af_ops->fill_stats_af(skb, dev);
3896
3897 if (err == -ENODATA)
3898 nla_nest_cancel(skb, af);
3899 else if (err < 0)
3900 goto nla_put_failure;
3901
3902 nla_nest_end(skb, af);
3903 }
3904 }
3905
3906 nla_nest_end(skb, attr);
3907
3908 *idxattr = 0;
3909 }
3910
10c9ead9
RP		 3911 nlmsg_end(skb, nlh);
3912
3913 return 0;
3914
3915nla_put_failure:
e8872a25
NA		 3916 /* not a multi message or no progress mean a real error */
3917 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3918 nlmsg_cancel(skb, nlh);
3919 else
3920 nlmsg_end(skb, nlh);
10c9ead9
RP		 3921
3922 return -EMSGSIZE;
3923}
3924
10c9ead9
RP		 3925static size_t if_nlmsg_stats_size(const struct net_device *dev,
3926 u32 filter_mask)
3927{
3928 size_t size = 0;
3929
e8872a25 3930 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 3931 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3932
97a47fac
NA		 3933 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3934 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 3935 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 3936
3937 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 3938 size += nla_total_size(ops->get_linkxstats_size(dev,
3939 attr));
97a47fac
NA		 3940 /* for IFLA_STATS_LINK_XSTATS */
3941 size += nla_total_size(0);
3942 }
3943 }
3944
80e73cc5
NA		 3945 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3946 struct net_device *_dev = (struct net_device *)dev;
3947 const struct rtnl_link_ops *ops = NULL;
3948 const struct net_device *master;
3949
3950 /* netdev_master_upper_dev_get can't take const */
3951 master = netdev_master_upper_dev_get(_dev);
3952 if (master)
3953 ops = master->rtnl_link_ops;
3954 if (ops && ops->get_linkxstats_size) {
3955 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3956
3957 size += nla_total_size(ops->get_linkxstats_size(dev,
3958 attr));
3959 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3960 size += nla_total_size(0);
3961 }
3962 }
3963
69ae6ad2
NF		 3964 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3965 size += rtnl_get_offload_stats_size(dev);
3966
aefb4d4a
RS		 3967 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
3968 struct rtnl_af_ops *af_ops;
3969
3970 /* for IFLA_STATS_AF_SPEC */
3971 size += nla_total_size(0);
3972
3973 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3974 if (af_ops->get_stats_af_size) {
3975 size += nla_total_size(
3976 af_ops->get_stats_af_size(dev));
3977
3978 /* for AF_* */
3979 size += nla_total_size(0);
3980 }
3981 }
3982 }
3983
10c9ead9
RP		 3984 return size;
3985}
3986
c21ef3e3
DA		 3987static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
3988 struct netlink_ext_ack *extack)
10c9ead9
RP		 3989{
3990 struct net *net = sock_net(skb->sk);
10c9ead9 3991 struct net_device *dev = NULL;
e8872a25
NA		 3992 int idxattr = 0, prividx = 0;
3993 struct if_stats_msg *ifsm;
10c9ead9
RP		 3994 struct sk_buff *nskb;
3995 u32 filter_mask;
3996 int err;
3997
4775cc1f
MK		 3998 if (nlmsg_len(nlh) < sizeof(*ifsm))
3999 return -EINVAL;
4000
10c9ead9
RP		 4001 ifsm = nlmsg_data(nlh);
4002 if (ifsm->ifindex > 0)
4003 dev = __dev_get_by_index(net, ifsm->ifindex);
4004 else
4005 return -EINVAL;
4006
4007 if (!dev)
4008 return -ENODEV;
4009
4010 filter_mask = ifsm->filter_mask;
4011 if (!filter_mask)
4012 return -EINVAL;
4013
4014 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
4015 if (!nskb)
4016 return -ENOBUFS;
4017
4018 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4019 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 4020 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 4021 if (err < 0) {
4022 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4023 WARN_ON(err == -EMSGSIZE);
4024 kfree_skb(nskb);
4025 } else {
4026 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4027 }
4028
4029 return err;
4030}
4031
4032static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4033{
e8872a25 4034 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 4035 struct net *net = sock_net(skb->sk);
e8872a25 4036 unsigned int flags = NLM_F_MULTI;
10c9ead9 4037 struct if_stats_msg *ifsm;
10c9ead9 4038 struct hlist_head *head;
e8872a25 4039 struct net_device *dev;
10c9ead9 4040 u32 filter_mask = 0;
e8872a25 4041 int idx = 0;
10c9ead9
RP		 4042
4043 s_h = cb->args[0];
4044 s_idx = cb->args[1];
e8872a25
NA		 4045 s_idxattr = cb->args[2];
4046 s_prividx = cb->args[3];
10c9ead9
RP		 4047
4048 cb->seq = net->dev_base_seq;
4049
4775cc1f
MK		 4050 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4051 return -EINVAL;
4052
10c9ead9
RP		 4053 ifsm = nlmsg_data(cb->nlh);
4054 filter_mask = ifsm->filter_mask;
4055 if (!filter_mask)
4056 return -EINVAL;
4057
4058 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4059 idx = 0;
4060 head = &net->dev_index_head[h];
4061 hlist_for_each_entry(dev, head, index_hlist) {
4062 if (idx < s_idx)
4063 goto cont;
4064 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4065 NETLINK_CB(cb->skb).portid,
4066 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 4067 flags, filter_mask,
4068 &s_idxattr, &s_prividx);
10c9ead9
RP		 4069 /* If we ran out of room on the first message,
4070 * we're in trouble
4071 */
4072 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4073
4074 if (err < 0)
4075 goto out;
e8872a25
NA		 4076 s_prividx = 0;
4077 s_idxattr = 0;
10c9ead9
RP		 4078 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4079cont:
4080 idx++;
4081 }
4082 }
4083out:
e8872a25
NA		 4084 cb->args[3] = s_prividx;
4085 cb->args[2] = s_idxattr;
10c9ead9
RP		 4086 cb->args[1] = idx;
4087 cb->args[0] = h;
4088
4089 return skb->len;
4090}
4091
1da177e4
LT		 4092/* Process one rtnetlink message. */
4093
2d4bc933
JB		 4094static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4095 struct netlink_ext_ack *extack)
1da177e4 4096{
3b1e0a65 4097 struct net *net = sock_net(skb->sk);
e2849863 4098 rtnl_doit_func doit;
617cfc75 4099 int kind;
1da177e4
LT		 4100 int family;
4101 int type;
2907c35f 4102 int err;
1da177e4 4103
1da177e4 4104 type = nlh->nlmsg_type;
1da177e4 4105 if (type > RTM_MAX)
038890fe 4106 return -EOPNOTSUPP;
1da177e4
LT		 4107
4108 type -= RTM_BASE;
4109
4110 /* All the messages must have at least 1 byte length */
573ce260 4111 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 4112 return 0;
4113
573ce260 4114 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 4115 kind = type&3;
4116
90f62cf3 4117 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 4118 return -EPERM;
1da177e4 4119
b8f3ab42 4120 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 4121 struct sock *rtnl;
e2849863 4122 rtnl_dumpit_func dumpit;
c7ac8679
GR		 4123 rtnl_calcit_func calcit;
4124 u16 min_dump_alloc = 0;
1da177e4 4125
e2849863
TG		 4126 dumpit = rtnl_get_dumpit(family, type);
4127 if (dumpit == NULL)
038890fe 4128 return -EOPNOTSUPP;
c7ac8679
GR		 4129 calcit = rtnl_get_calcit(family, type);
4130 if (calcit)
115c9b81 4131 min_dump_alloc = calcit(skb, nlh);
9ac4a169 4132
2907c35f 4133 __rtnl_unlock();
97c53cac 4134 rtnl = net->rtnl;
80d326fa
PNA		 4135 {
4136 struct netlink_dump_control c = {
4137 .dump = dumpit,
4138 .min_dump_alloc = min_dump_alloc,
4139 };
4140 err = netlink_dump_start(rtnl, skb, nlh, &c);
4141 }
2907c35f
ED		 4142 rtnl_lock();
4143 return err;
1da177e4
LT		 4144 }
4145
e2849863
TG		 4146 doit = rtnl_get_doit(family, type);
4147 if (doit == NULL)
038890fe 4148 return -EOPNOTSUPP;
1da177e4 4149
c21ef3e3 4150 return doit(skb, nlh, extack);
1da177e4
LT		 4151}
4152
cd40b7d3 4153static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 4154{
cd40b7d3
DL		 4155 rtnl_lock();
4156 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4157 rtnl_unlock();
1da177e4
LT		 4158}
4159
1da177e4
LT		 4160static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4161{
351638e7 4162 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 4163
1da177e4 4164 switch (event) {
5138e86f 4165 case NETDEV_REBOOT:
5138e86f
VY		 4166 case NETDEV_CHANGENAME:
4167 case NETDEV_FEAT_CHANGE:
4168 case NETDEV_BONDING_FAILOVER:
5138e86f 4169 case NETDEV_NOTIFY_PEERS:
5138e86f 4170 case NETDEV_RESEND_IGMP:
5138e86f 4171 case NETDEV_CHANGEINFODATA:
bf74b20d 4172 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 4173 break;
4174 default:
1da177e4
LT		 4175 break;
4176 }
4177 return NOTIFY_DONE;
4178}
4179
4180static struct notifier_block rtnetlink_dev_notifier = {
4181 .notifier_call = rtnetlink_event,
4182};
4183
97c53cac 4184
2c8c1e72 4185static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 4186{
4187 struct sock *sk;
a31f2d17
PNA		 4188 struct netlink_kernel_cfg cfg = {
4189 .groups = RTNLGRP_MAX,
4190 .input = rtnetlink_rcv,
4191 .cb_mutex = &rtnl_mutex,
9785e10a 4192 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 4193 };
4194
9f00d977 4195 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 4196 if (!sk)
4197 return -ENOMEM;
97c53cac
DL		 4198 net->rtnl = sk;
4199 return 0;
4200}
4201
2c8c1e72 4202static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 4203{
775516bf
DL		 4204 netlink_kernel_release(net->rtnl);
4205 net->rtnl = NULL;
97c53cac
DL		 4206}
4207
4208static struct pernet_operations rtnetlink_net_ops = {
4209 .init = rtnetlink_net_init,
4210 .exit = rtnetlink_net_exit,
4211};
4212
1da177e4
LT		 4213void __init rtnetlink_init(void)
4214{
97c53cac 4215 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 4216 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 4217
1da177e4 4218 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 4219
c7ac8679
GR		 4220 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4221 rtnl_dump_ifinfo, rtnl_calcit);
4222 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4223 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4224 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 4225
c7ac8679
GR		 4226 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4227 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
a7678c70 4228 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
77162022
JF		 4229
4230 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4231 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4232 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 4233
4234 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 4235 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 4236 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
10c9ead9
RP		 4237
4238 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4239 NULL);
1da177e4 4240}
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