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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
1127 /* Not all SR-IOV capable drivers support the
1128 * spoofcheck and "RSS query enable" query. Preset to
1129 * -1 so the user space tool can detect that the driver
1130 * didn't report anything.
1131 */
1132 ivi.spoofchk = -1;
1133 ivi.rss_query_en = -1;
1134 ivi.trusted = -1;
1135 memset(ivi.mac, 0, sizeof(ivi.mac));
1136 /* The default value for VF link state is "auto"
1137 * IFLA_VF_LINK_STATE_AUTO which equals zero
1138 */
1139 ivi.linkstate = 0;
79aab093
MS		 1140 /* VLAN Protocol by default is 802.1Q */
1141 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1142 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1143 return 0;
1144
775f4f05
DC		 1145 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1146
b22b941b
HFS		 1147 vf_mac.vf =
1148 vf_vlan.vf =
79aab093 1149 vf_vlan_info.vf =
b22b941b
HFS		 1150 vf_rate.vf =
1151 vf_tx_rate.vf =
1152 vf_spoofchk.vf =
1153 vf_linkstate.vf =
1154 vf_rss_query_en.vf =
1155 vf_trust.vf = ivi.vf;
1156
1157 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1158 vf_vlan.vlan = ivi.vlan;
1159 vf_vlan.qos = ivi.qos;
79aab093
MS		 1160 vf_vlan_info.vlan = ivi.vlan;
1161 vf_vlan_info.qos = ivi.qos;
1162 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1163 vf_tx_rate.rate = ivi.max_tx_rate;
1164 vf_rate.min_tx_rate = ivi.min_tx_rate;
1165 vf_rate.max_tx_rate = ivi.max_tx_rate;
1166 vf_spoofchk.setting = ivi.spoofchk;
1167 vf_linkstate.link_state = ivi.linkstate;
1168 vf_rss_query_en.setting = ivi.rss_query_en;
1169 vf_trust.setting = ivi.trusted;
1170 vf = nla_nest_start(skb, IFLA_VF_INFO);
79aab093
MS		 1171 if (!vf)
1172 goto nla_put_vfinfo_failure;
b22b941b
HFS		 1173 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1174 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1175 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1176 &vf_rate) ||
1177 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1178 &vf_tx_rate) ||
1179 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1180 &vf_spoofchk) ||
1181 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1182 &vf_linkstate) ||
1183 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1184 sizeof(vf_rss_query_en),
1185 &vf_rss_query_en) ||
1186 nla_put(skb, IFLA_VF_TRUST,
1187 sizeof(vf_trust), &vf_trust))
79aab093
MS		 1188 goto nla_put_vf_failure;
1189 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1190 if (!vfvlanlist)
1191 goto nla_put_vf_failure;
1192 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1193 &vf_vlan_info)) {
1194 nla_nest_cancel(skb, vfvlanlist);
1195 goto nla_put_vf_failure;
1196 }
1197 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1198 memset(&vf_stats, 0, sizeof(vf_stats));
1199 if (dev->netdev_ops->ndo_get_vf_stats)
1200 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1201 &vf_stats);
1202 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
79aab093
MS		 1203 if (!vfstats)
1204 goto nla_put_vf_failure;
343a6d8e
ND		 1205 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1206 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1207 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1208 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1209 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1210 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1211 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1212 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1213 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1214 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
79aab093
MS		 1216 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1217 nla_nest_cancel(skb, vfstats);
1218 goto nla_put_vf_failure;
1219 }
b22b941b
HFS		 1220 nla_nest_end(skb, vfstats);
1221 nla_nest_end(skb, vf);
1222 return 0;
79aab093
MS		 1223
1224nla_put_vf_failure:
1225 nla_nest_cancel(skb, vf);
1226nla_put_vfinfo_failure:
1227 nla_nest_cancel(skb, vfinfo);
1228 return -EMSGSIZE;
b22b941b
HFS		 1229}
1230
1231static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1232{
5f8e4474
KL		 1233 struct rtnl_link_ifmap map;
1234
1235 memset(&map, 0, sizeof(map));
1236 map.mem_start = dev->mem_start;
1237 map.mem_end = dev->mem_end;
1238 map.base_addr = dev->base_addr;
1239 map.irq = dev->irq;
1240 map.dma = dev->dma;
1241 map.port = dev->if_port;
1242
270cb4d0 1243 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1244 return -EMSGSIZE;
1245
1246 return 0;
1247}
1248
d67b9cd2
DB		 1249static u8 rtnl_xdp_attached_mode(struct net_device *dev)
1250{
1251 const struct net_device_ops *ops = dev->netdev_ops;
1252
1253 ASSERT_RTNL();
1254
1255 if (rcu_access_pointer(dev->xdp_prog))
1256 return XDP_ATTACHED_SKB;
1257 if (ops->ndo_xdp && __dev_xdp_attached(dev, ops->ndo_xdp))
1258 return XDP_ATTACHED_DRV;
1259
1260 return XDP_ATTACHED_NONE;
1261}
1262
d1fdd913
BB		 1263static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1264{
d1fdd913
BB		 1265 struct nlattr *xdp;
1266 int err;
1267
d1fdd913
BB		 1268 xdp = nla_nest_start(skb, IFLA_XDP);
1269 if (!xdp)
1270 return -EMSGSIZE;
d67b9cd2
DB		 1271
1272 err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
1273 rtnl_xdp_attached_mode(dev));
d1fdd913
BB		 1274 if (err)
1275 goto err_cancel;
1276
1277 nla_nest_end(skb, xdp);
1278 return 0;
1279
1280err_cancel:
1281 nla_nest_cancel(skb, xdp);
1282 return err;
1283}
1284
b60c5115 1285static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1286 int type, u32 pid, u32 seq, u32 change,
bf74b20d 1287 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1288{
1289 struct ifinfomsg *ifm;
1290 struct nlmsghdr *nlh;
b22b941b 1291 struct nlattr *af_spec;
f8ff182c 1292 struct rtnl_af_ops *af_ops;
898e5061 1293 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1294
2907c35f 1295 ASSERT_RTNL();
b60c5115
TG		 1296 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1297 if (nlh == NULL)
26932566 1298 return -EMSGSIZE;
1da177e4 1299
b60c5115
TG		 1300 ifm = nlmsg_data(nlh);
1301 ifm->ifi_family = AF_UNSPEC;
1302 ifm->__ifi_pad = 0;
1303 ifm->ifi_type = dev->type;
1304 ifm->ifi_index = dev->ifindex;
1305 ifm->ifi_flags = dev_get_flags(dev);
1306 ifm->ifi_change = change;
1307
a6574349
DM		 1308 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1309 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1310 nla_put_u8(skb, IFLA_OPERSTATE,
1311 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1312 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1313 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1314 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1315 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1316 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1317 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1318 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1319#ifdef CONFIG_RPS
76ff5cc9 1320 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1321#endif
a54acb3a
ND		 1322 (dev->ifindex != dev_get_iflink(dev) &&
1323 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1324 (upper_dev &&
1325 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1326 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1327 (dev->qdisc &&
1328 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1329 (dev->ifalias &&
2d3b479d 1330 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1331 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1332 atomic_read(&dev->carrier_changes)) ||
1333 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1334 goto nla_put_failure;
0b815a1a 1335
b22b941b
HFS		 1336 if (rtnl_fill_link_ifmap(skb, dev))
1337 goto nla_put_failure;
1da177e4
LT		 1338
1339 if (dev->addr_len) {
a6574349
DM		 1340 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1341 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1342 goto nla_put_failure;
1da177e4
LT		 1343 }
1344
66cae9ed
JP		 1345 if (rtnl_phys_port_id_fill(skb, dev))
1346 goto nla_put_failure;
1347
db24a904
DA		 1348 if (rtnl_phys_port_name_fill(skb, dev))
1349 goto nla_put_failure;
1350
82f28412
JP		 1351 if (rtnl_phys_switch_id_fill(skb, dev))
1352 goto nla_put_failure;
1353
b22b941b 1354 if (rtnl_fill_stats(skb, dev))
10708f37 1355 goto nla_put_failure;
10708f37 1356
a6574349
DM		 1357 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1358 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1359 goto nla_put_failure;
57b61080 1360
b22b941b
HFS		 1361 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1362 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1363 int i;
b22b941b 1364 struct nlattr *vfinfo;
c02db8c6
CW		 1365 int num_vfs = dev_num_vf(dev->dev.parent);
1366
c02db8c6
CW		 1367 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1368 if (!vfinfo)
1369 goto nla_put_failure;
1370 for (i = 0; i < num_vfs; i++) {
b22b941b 1371 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1372 goto nla_put_failure;
ebc08a6f 1373 }
b22b941b 1374
c02db8c6 1375 nla_nest_end(skb, vfinfo);
ebc08a6f 1376 }
57b61080 1377
c53864fd 1378 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1379 goto nla_put_failure;
1380
d1fdd913
BB		 1381 if (rtnl_xdp_fill(skb, dev))
1382 goto nla_put_failure;
1383
ba7d49b1 1384 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1385 if (rtnl_link_fill(skb, dev) < 0)
1386 goto nla_put_failure;
1387 }
1388
d37512a2
ND		 1389 if (dev->rtnl_link_ops &&
1390 dev->rtnl_link_ops->get_link_net) {
1391 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1392
1393 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1394 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1395
1396 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1397 goto nla_put_failure;
1398 }
1399 }
1400
f8ff182c
TG		 1401 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1402 goto nla_put_failure;
1403
1404 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1405 if (af_ops->fill_link_af) {
1406 struct nlattr *af;
1407 int err;
1408
1409 if (!(af = nla_nest_start(skb, af_ops->family)))
1410 goto nla_put_failure;
1411
d5566fd7 1412 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1413
1414 /*
1415 * Caller may return ENODATA to indicate that there
1416 * was no data to be dumped. This is not an error, it
1417 * means we should trim the attribute header and
1418 * continue.
1419 */
1420 if (err == -ENODATA)
1421 nla_nest_cancel(skb, af);
1422 else if (err < 0)
1423 goto nla_put_failure;
1424
1425 nla_nest_end(skb, af);
1426 }
1427 }
1428
1429 nla_nest_end(skb, af_spec);
1430
053c095a
JB		 1431 nlmsg_end(skb, nlh);
1432 return 0;
b60c5115
TG		 1433
1434nla_put_failure:
26932566
PM		 1435 nlmsg_cancel(skb, nlh);
1436 return -EMSGSIZE;
1da177e4
LT		 1437}
1438
f7b12606 1439static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1440 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1441 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1442 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1443 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1444 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1445 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1446 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1447 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1448 [IFLA_TXQLEN] = { .type = NLA_U32 },
1449 [IFLA_WEIGHT] = { .type = NLA_U32 },
1450 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1451 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1452 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1453 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1454 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1455 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1456 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1457 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1458 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1459 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1460 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1461 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1462 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1463 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1464 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1465 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1466 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1467 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1468 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1469 [IFLA_XDP] = { .type = NLA_NESTED },
da5e0494
TG		 1470};
1471
38f7b870
PM		 1472static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1473 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1474 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1475 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1476 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1477};
1478
c02db8c6 1479static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1480 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1481 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1482 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1483 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1484 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1485 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1486 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1487 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1488 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1489 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1490 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1491 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1492};
1493
57b61080
SF		 1494static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1495 [IFLA_PORT_VF] = { .type = NLA_U32 },
1496 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1497 .len = PORT_PROFILE_MAX },
57b61080
SF		 1498 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1499 .len = PORT_UUID_MAX },
1500 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1501 .len = PORT_UUID_MAX },
1502 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1503 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 1504
1505 /* Unused, but we need to keep it here since user space could
1506 * fill it. It's also broken with regard to NLA_BINARY use in
1507 * combination with structs.
1508 */
1509 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1510 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 1511};
1512
d1fdd913
BB		 1513static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1514 [IFLA_XDP_FD] = { .type = NLA_S32 },
1515 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 1516 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
d1fdd913
BB		 1517};
1518
dc599f76
DA		 1519static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1520{
1521 const struct rtnl_link_ops *ops = NULL;
1522 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1523
fceb6435
JB		 1524 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
1525 ifla_info_policy, NULL) < 0)
dc599f76
DA		 1526 return NULL;
1527
1528 if (linfo[IFLA_INFO_KIND]) {
1529 char kind[MODULE_NAME_LEN];
1530
1531 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1532 ops = rtnl_link_ops_get(kind);
1533 }
1534
1535 return ops;
1536}
1537
1538static bool link_master_filtered(struct net_device *dev, int master_idx)
1539{
1540 struct net_device *master;
1541
1542 if (!master_idx)
1543 return false;
1544
1545 master = netdev_master_upper_dev_get(dev);
1546 if (!master || master->ifindex != master_idx)
1547 return true;
1548
1549 return false;
1550}
1551
1552static bool link_kind_filtered(const struct net_device *dev,
1553 const struct rtnl_link_ops *kind_ops)
1554{
1555 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1556 return true;
1557
1558 return false;
1559}
1560
1561static bool link_dump_filtered(struct net_device *dev,
1562 int master_idx,
1563 const struct rtnl_link_ops *kind_ops)
1564{
1565 if (link_master_filtered(dev, master_idx) ||
1566 link_kind_filtered(dev, kind_ops))
1567 return true;
1568
1569 return false;
1570}
1571
f7b12606
JP		 1572static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1573{
1574 struct net *net = sock_net(skb->sk);
1575 int h, s_h;
1576 int idx = 0, s_idx;
1577 struct net_device *dev;
1578 struct hlist_head *head;
1579 struct nlattr *tb[IFLA_MAX+1];
1580 u32 ext_filter_mask = 0;
dc599f76
DA		 1581 const struct rtnl_link_ops *kind_ops = NULL;
1582 unsigned int flags = NLM_F_MULTI;
1583 int master_idx = 0;
973462bb 1584 int err;
e5eca6d4 1585 int hdrlen;
f7b12606
JP		 1586
1587 s_h = cb->args[0];
1588 s_idx = cb->args[1];
1589
f7b12606
JP		 1590 cb->seq = net->dev_base_seq;
1591
e5eca6d4
MS		 1592 /* A hack to preserve kernel<->userspace interface.
1593 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1594 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1595 * what iproute2 < v3.9.0 used.
1596 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1597 * attribute, its netlink message is shorter than struct ifinfomsg.
1598 */
1599 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1600 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1601
fceb6435
JB		 1602 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
1603 ifla_policy, NULL) >= 0) {
f7b12606
JP		 1604 if (tb[IFLA_EXT_MASK])
1605 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1606
1607 if (tb[IFLA_MASTER])
1608 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1609
1610 if (tb[IFLA_LINKINFO])
1611 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1612
1613 if (master_idx || kind_ops)
1614 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1615 }
1616
1617 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1618 idx = 0;
1619 head = &net->dev_index_head[h];
cac5e65e 1620 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 1621 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 1622 goto cont;
f7b12606
JP		 1623 if (idx < s_idx)
1624 goto cont;
973462bb
DG		 1625 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1626 NETLINK_CB(cb->skb).portid,
1627 cb->nlh->nlmsg_seq, 0,
dc599f76 1628 flags,
bf74b20d 1629 ext_filter_mask);
973462bb
DG		 1630 /* If we ran out of room on the first message,
1631 * we're in trouble
1632 */
1633 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1634
7b46a644 1635 if (err < 0)
f7b12606
JP		 1636 goto out;
1637
1638 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1639cont:
1640 idx++;
1641 }
1642 }
1643out:
f7b12606
JP		 1644 cb->args[1] = idx;
1645 cb->args[0] = h;
1646
1647 return skb->len;
1648}
1649
fceb6435
JB		 1650int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
1651 struct netlink_ext_ack *exterr)
f7b12606 1652{
fceb6435 1653 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
f7b12606
JP		 1654}
1655EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1656
81adee47
EB		 1657struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1658{
1659 struct net *net;
1660 /* Examine the link attributes and figure out which
1661 * network namespace we are talking about.
1662 */
1663 if (tb[IFLA_NET_NS_PID])
1664 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1665 else if (tb[IFLA_NET_NS_FD])
1666 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1667 else
1668 net = get_net(src_net);
1669 return net;
1670}
1671EXPORT_SYMBOL(rtnl_link_get_net);
1672
1840bb13
TG		 1673static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1674{
1675 if (dev) {
1676 if (tb[IFLA_ADDRESS] &&
1677 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1678 return -EINVAL;
1679
1680 if (tb[IFLA_BROADCAST] &&
1681 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1682 return -EINVAL;
1683 }
1684
cf7afbfe
TG		 1685 if (tb[IFLA_AF_SPEC]) {
1686 struct nlattr *af;
1687 int rem, err;
1688
1689 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1690 const struct rtnl_af_ops *af_ops;
1691
1692 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1693 return -EAFNOSUPPORT;
1694
1695 if (!af_ops->set_link_af)
1696 return -EOPNOTSUPP;
1697
1698 if (af_ops->validate_link_af) {
6d3a9a68 1699 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1700 if (err < 0)
1701 return err;
1702 }
1703 }
1704 }
1705
1840bb13
TG		 1706 return 0;
1707}
1708
cc8e27cc
EC		 1709static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1710 int guid_type)
1711{
1712 const struct net_device_ops *ops = dev->netdev_ops;
1713
1714 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1715}
1716
1717static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1718{
1719 if (dev->type != ARPHRD_INFINIBAND)
1720 return -EOPNOTSUPP;
1721
1722 return handle_infiniband_guid(dev, ivt, guid_type);
1723}
1724
4f7d2cdf 1725static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1726{
c02db8c6 1727 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1728 int err = -EINVAL;
c02db8c6 1729
4f7d2cdf
DB		 1730 if (tb[IFLA_VF_MAC]) {
1731 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1732
4f7d2cdf
DB		 1733 err = -EOPNOTSUPP;
1734 if (ops->ndo_set_vf_mac)
1735 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1736 ivm->mac);
1737 if (err < 0)
1738 return err;
1739 }
1740
1741 if (tb[IFLA_VF_VLAN]) {
1742 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1743
1744 err = -EOPNOTSUPP;
1745 if (ops->ndo_set_vf_vlan)
1746 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 1747 ivv->qos,
1748 htons(ETH_P_8021Q));
1749 if (err < 0)
1750 return err;
1751 }
1752
1753 if (tb[IFLA_VF_VLAN_LIST]) {
1754 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1755 struct nlattr *attr;
1756 int rem, len = 0;
1757
1758 err = -EOPNOTSUPP;
1759 if (!ops->ndo_set_vf_vlan)
1760 return err;
1761
1762 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1763 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1764 nla_len(attr) < NLA_HDRLEN) {
1765 return -EINVAL;
1766 }
1767 if (len >= MAX_VLAN_LIST_LEN)
1768 return -EOPNOTSUPP;
1769 ivvl[len] = nla_data(attr);
1770
1771 len++;
1772 }
fa34cd94
AB		 1773 if (len == 0)
1774 return -EINVAL;
1775
79aab093
MS		 1776 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1777 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 1778 if (err < 0)
1779 return err;
c02db8c6 1780 }
4f7d2cdf
DB		 1781
1782 if (tb[IFLA_VF_TX_RATE]) {
1783 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1784 struct ifla_vf_info ivf;
1785
1786 err = -EOPNOTSUPP;
1787 if (ops->ndo_get_vf_config)
1788 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1789 if (err < 0)
1790 return err;
1791
1792 err = -EOPNOTSUPP;
1793 if (ops->ndo_set_vf_rate)
1794 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1795 ivf.min_tx_rate,
1796 ivt->rate);
1797 if (err < 0)
1798 return err;
1799 }
1800
1801 if (tb[IFLA_VF_RATE]) {
1802 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1803
1804 err = -EOPNOTSUPP;
1805 if (ops->ndo_set_vf_rate)
1806 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1807 ivt->min_tx_rate,
1808 ivt->max_tx_rate);
1809 if (err < 0)
1810 return err;
1811 }
1812
1813 if (tb[IFLA_VF_SPOOFCHK]) {
1814 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1815
1816 err = -EOPNOTSUPP;
1817 if (ops->ndo_set_vf_spoofchk)
1818 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1819 ivs->setting);
1820 if (err < 0)
1821 return err;
1822 }
1823
1824 if (tb[IFLA_VF_LINK_STATE]) {
1825 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1826
1827 err = -EOPNOTSUPP;
1828 if (ops->ndo_set_vf_link_state)
1829 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1830 ivl->link_state);
1831 if (err < 0)
1832 return err;
1833 }
1834
1835 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1836 struct ifla_vf_rss_query_en *ivrssq_en;
1837
1838 err = -EOPNOTSUPP;
1839 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1840 if (ops->ndo_set_vf_rss_query_en)
1841 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1842 ivrssq_en->setting);
1843 if (err < 0)
1844 return err;
1845 }
1846
dd461d6a
HS		 1847 if (tb[IFLA_VF_TRUST]) {
1848 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1849
1850 err = -EOPNOTSUPP;
1851 if (ops->ndo_set_vf_trust)
1852 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1853 if (err < 0)
1854 return err;
1855 }
1856
cc8e27cc
EC		 1857 if (tb[IFLA_VF_IB_NODE_GUID]) {
1858 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1859
1860 if (!ops->ndo_set_vf_guid)
1861 return -EOPNOTSUPP;
1862
1863 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1864 }
1865
1866 if (tb[IFLA_VF_IB_PORT_GUID]) {
1867 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1868
1869 if (!ops->ndo_set_vf_guid)
1870 return -EOPNOTSUPP;
1871
1872 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1873 }
1874
c02db8c6
CW		 1875 return err;
1876}
1877
fbaec0ea
JP		 1878static int do_set_master(struct net_device *dev, int ifindex)
1879{
898e5061 1880 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1881 const struct net_device_ops *ops;
1882 int err;
1883
898e5061
JP		 1884 if (upper_dev) {
1885 if (upper_dev->ifindex == ifindex)
fbaec0ea 1886 return 0;
898e5061 1887 ops = upper_dev->netdev_ops;
fbaec0ea 1888 if (ops->ndo_del_slave) {
898e5061 1889 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1890 if (err)
1891 return err;
1892 } else {
1893 return -EOPNOTSUPP;
1894 }
1895 }
1896
1897 if (ifindex) {
898e5061
JP		 1898 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1899 if (!upper_dev)
fbaec0ea 1900 return -EINVAL;
898e5061 1901 ops = upper_dev->netdev_ops;
fbaec0ea 1902 if (ops->ndo_add_slave) {
898e5061 1903 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1904 if (err)
1905 return err;
1906 } else {
1907 return -EOPNOTSUPP;
1908 }
1909 }
1910 return 0;
1911}
1912
90c325e3 1913#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1914/* notify flag means notify + modified. */
1915#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1916static int do_setlink(const struct sk_buff *skb,
1917 struct net_device *dev, struct ifinfomsg *ifm,
ddf9f970 1918 struct netlink_ext_ack *extack,
90c325e3 1919 struct nlattr **tb, char *ifname, int status)
1da177e4 1920{
d314774c 1921 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1922 int err;
1da177e4 1923
f0630529 1924 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1925 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1926 if (IS_ERR(net)) {
1927 err = PTR_ERR(net);
1928 goto errout;
1929 }
90f62cf3 1930 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1931 put_net(net);
b51642f6
EB		 1932 err = -EPERM;
1933 goto errout;
1934 }
d8a5ec67
EB		 1935 err = dev_change_net_namespace(dev, net, ifname);
1936 put_net(net);
1937 if (err)
1938 goto errout;
90c325e3 1939 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1940 }
1941
da5e0494 1942 if (tb[IFLA_MAP]) {
1da177e4
LT		 1943 struct rtnl_link_ifmap *u_map;
1944 struct ifmap k_map;
1945
d314774c 1946 if (!ops->ndo_set_config) {
1da177e4 1947 err = -EOPNOTSUPP;
0157f60c 1948 goto errout;
1da177e4
LT		 1949 }
1950
1951 if (!netif_device_present(dev)) {
1952 err = -ENODEV;
0157f60c 1953 goto errout;
1da177e4 1954 }
1da177e4 1955
da5e0494 1956 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1957 k_map.mem_start = (unsigned long) u_map->mem_start;
1958 k_map.mem_end = (unsigned long) u_map->mem_end;
1959 k_map.base_addr = (unsigned short) u_map->base_addr;
1960 k_map.irq = (unsigned char) u_map->irq;
1961 k_map.dma = (unsigned char) u_map->dma;
1962 k_map.port = (unsigned char) u_map->port;
1963
d314774c 1964 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1965 if (err < 0)
0157f60c 1966 goto errout;
1da177e4 1967
ba998906 1968 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1969 }
1970
da5e0494 1971 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1972 struct sockaddr *sa;
1973 int len;
1974
70f8e78e
DM		 1975 len = sizeof(sa_family_t) + dev->addr_len;
1976 sa = kmalloc(len, GFP_KERNEL);
1977 if (!sa) {
1978 err = -ENOMEM;
0157f60c 1979 goto errout;
70f8e78e
DM		 1980 }
1981 sa->sa_family = dev->type;
da5e0494 1982 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1983 dev->addr_len);
e7c3273e 1984 err = dev_set_mac_address(dev, sa);
70f8e78e 1985 kfree(sa);
1da177e4 1986 if (err)
0157f60c 1987 goto errout;
90c325e3 1988 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1989 }
1990
da5e0494
TG		 1991 if (tb[IFLA_MTU]) {
1992 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1993 if (err < 0)
0157f60c 1994 goto errout;
90c325e3 1995 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1996 }
1997
cbda10fa
VD		 1998 if (tb[IFLA_GROUP]) {
1999 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 2000 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 2001 }
2002
da5e0494
TG		 2003 /*
2004 * Interface selected by interface index but interface
2005 * name provided implies that a name change has been
2006 * requested.
2007 */
51055be8 2008 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2009 err = dev_change_name(dev, ifname);
2010 if (err < 0)
0157f60c 2011 goto errout;
90c325e3 2012 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2013 }
2014
0b815a1a
SH		 2015 if (tb[IFLA_IFALIAS]) {
2016 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2017 nla_len(tb[IFLA_IFALIAS]));
2018 if (err < 0)
2019 goto errout;
ba998906 2020 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2021 }
2022
da5e0494
TG		 2023 if (tb[IFLA_BROADCAST]) {
2024 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2025 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2026 }
2027
83b496e9 2028 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 2029 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 2030 if (err < 0)
2031 goto errout;
83b496e9 2032 }
1da177e4 2033
fbaec0ea
JP		 2034 if (tb[IFLA_MASTER]) {
2035 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2036 if (err)
2037 goto errout;
90c325e3 2038 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2039 }
2040
9a57247f
JP		 2041 if (tb[IFLA_CARRIER]) {
2042 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2043 if (err)
2044 goto errout;
90c325e3 2045 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2046 }
2047
5d1180fc
ND		 2048 if (tb[IFLA_TXQLEN]) {
2049 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
08294a26
JW		 2050 unsigned long orig_len = dev->tx_queue_len;
2051
2052 if (dev->tx_queue_len ^ value) {
2053 dev->tx_queue_len = value;
2054 err = call_netdevice_notifiers(
2055 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2056 err = notifier_to_errno(err);
2057 if (err) {
2058 dev->tx_queue_len = orig_len;
2059 goto errout;
2060 }
ba998906 2061 status |= DO_SETLINK_NOTIFY;
08294a26 2062 }
5d1180fc 2063 }
b00055aa 2064
da5e0494 2065 if (tb[IFLA_OPERSTATE])
93b2d4a2 2066 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2067
da5e0494 2068 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2069 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2070
93b2d4a2 2071 write_lock_bh(&dev_base_lock);
1889b0e7 2072 if (dev->link_mode ^ value)
ba998906 2073 status |= DO_SETLINK_NOTIFY;
1889b0e7 2074 dev->link_mode = value;
93b2d4a2 2075 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 2076 }
2077
c02db8c6 2078 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2079 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2080 struct nlattr *attr;
2081 int rem;
4f7d2cdf 2082
c02db8c6 2083 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2084 if (nla_type(attr) != IFLA_VF_INFO ||
2085 nla_len(attr) < NLA_HDRLEN) {
253683bb 2086 err = -EINVAL;
c02db8c6 2087 goto errout;
253683bb 2088 }
4f7d2cdf 2089 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
fceb6435 2090 ifla_vf_policy, NULL);
4f7d2cdf
DB		 2091 if (err < 0)
2092 goto errout;
2093 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2094 if (err < 0)
2095 goto errout;
ba998906 2096 status |= DO_SETLINK_NOTIFY;
c02db8c6 2097 }
ebc08a6f 2098 }
1da177e4
LT		 2099 err = 0;
2100
57b61080
SF		 2101 if (tb[IFLA_VF_PORTS]) {
2102 struct nlattr *port[IFLA_PORT_MAX+1];
2103 struct nlattr *attr;
2104 int vf;
2105 int rem;
2106
2107 err = -EOPNOTSUPP;
2108 if (!ops->ndo_set_vf_port)
2109 goto errout;
2110
2111 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2112 if (nla_type(attr) != IFLA_VF_PORT ||
2113 nla_len(attr) < NLA_HDRLEN) {
2114 err = -EINVAL;
2115 goto errout;
2116 }
2117 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
fceb6435 2118 ifla_port_policy, NULL);
57b61080
SF		 2119 if (err < 0)
2120 goto errout;
2121 if (!port[IFLA_PORT_VF]) {
2122 err = -EOPNOTSUPP;
2123 goto errout;
2124 }
2125 vf = nla_get_u32(port[IFLA_PORT_VF]);
2126 err = ops->ndo_set_vf_port(dev, vf, port);
2127 if (err < 0)
2128 goto errout;
ba998906 2129 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2130 }
2131 }
2132 err = 0;
2133
2134 if (tb[IFLA_PORT_SELF]) {
2135 struct nlattr *port[IFLA_PORT_MAX+1];
2136
2137 err = nla_parse_nested(port, IFLA_PORT_MAX,
fceb6435
JB		 2138 tb[IFLA_PORT_SELF], ifla_port_policy,
2139 NULL);
57b61080
SF		 2140 if (err < 0)
2141 goto errout;
2142
2143 err = -EOPNOTSUPP;
2144 if (ops->ndo_set_vf_port)
2145 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2146 if (err < 0)
2147 goto errout;
ba998906 2148 status |= DO_SETLINK_NOTIFY;
57b61080 2149 }
f8ff182c
TG		 2150
2151 if (tb[IFLA_AF_SPEC]) {
2152 struct nlattr *af;
2153 int rem;
2154
2155 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2156 const struct rtnl_af_ops *af_ops;
2157
2158 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2159 BUG();
f8ff182c 2160
cf7afbfe 2161 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 2162 if (err < 0)
2163 goto errout;
2164
ba998906 2165 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2166 }
2167 }
57b61080
SF		 2168 err = 0;
2169
88d6378b
AK		 2170 if (tb[IFLA_PROTO_DOWN]) {
2171 err = dev_change_proto_down(dev,
2172 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2173 if (err)
2174 goto errout;
2175 status |= DO_SETLINK_NOTIFY;
2176 }
2177
d1fdd913
BB		 2178 if (tb[IFLA_XDP]) {
2179 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 2180 u32 xdp_flags = 0;
d1fdd913
BB		 2181
2182 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
fceb6435 2183 ifla_xdp_policy, NULL);
d1fdd913
BB		 2184 if (err < 0)
2185 goto errout;
2186
262d8625
BB		 2187 if (xdp[IFLA_XDP_ATTACHED]) {
2188 err = -EINVAL;
2189 goto errout;
2190 }
85de8576
DB		 2191
2192 if (xdp[IFLA_XDP_FLAGS]) {
2193 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2194 if (xdp_flags & ~XDP_FLAGS_MASK) {
2195 err = -EINVAL;
2196 goto errout;
2197 }
0489df9a
DB		 2198 if ((xdp_flags & XDP_FLAGS_SKB_MODE) &&
2199 (xdp_flags & XDP_FLAGS_DRV_MODE)) {
2200 err = -EINVAL;
2201 goto errout;
2202 }
85de8576
DB		 2203 }
2204
d1fdd913 2205 if (xdp[IFLA_XDP_FD]) {
ddf9f970 2206 err = dev_change_xdp_fd(dev, extack,
85de8576
DB		 2207 nla_get_s32(xdp[IFLA_XDP_FD]),
2208 xdp_flags);
d1fdd913
BB		 2209 if (err)
2210 goto errout;
2211 status |= DO_SETLINK_NOTIFY;
2212 }
2213 }
2214
0157f60c 2215errout:
ba998906
ND		 2216 if (status & DO_SETLINK_MODIFIED) {
2217 if (status & DO_SETLINK_NOTIFY)
2218 netdev_state_change(dev);
2219
2220 if (err < 0)
2221 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",
2222 dev->name);
2223 }
da5e0494 2224
0157f60c
PM		 2225 return err;
2226}
1da177e4 2227
c21ef3e3
DA		 2228static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2229 struct netlink_ext_ack *extack)
0157f60c 2230{
3b1e0a65 2231 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2232 struct ifinfomsg *ifm;
2233 struct net_device *dev;
2234 int err;
2235 struct nlattr *tb[IFLA_MAX+1];
2236 char ifname[IFNAMSIZ];
2237
c21ef3e3
DA		 2238 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
2239 extack);
0157f60c
PM		 2240 if (err < 0)
2241 goto errout;
2242
2243 if (tb[IFLA_IFNAME])
2244 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2245 else
2246 ifname[0] = '\0';
2247
2248 err = -EINVAL;
2249 ifm = nlmsg_data(nlh);
2250 if (ifm->ifi_index > 0)
a3d12891 2251 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2252 else if (tb[IFLA_IFNAME])
a3d12891 2253 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2254 else
2255 goto errout;
2256
2257 if (dev == NULL) {
2258 err = -ENODEV;
2259 goto errout;
2260 }
2261
e0d087af
ED		 2262 err = validate_linkmsg(dev, tb);
2263 if (err < 0)
a3d12891 2264 goto errout;
0157f60c 2265
ddf9f970 2266 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
da5e0494 2267errout:
1da177e4
LT		 2268 return err;
2269}
2270
66400d54
WC		 2271static int rtnl_group_dellink(const struct net *net, int group)
2272{
2273 struct net_device *dev, *aux;
2274 LIST_HEAD(list_kill);
2275 bool found = false;
2276
2277 if (!group)
2278 return -EPERM;
2279
2280 for_each_netdev(net, dev) {
2281 if (dev->group == group) {
2282 const struct rtnl_link_ops *ops;
2283
2284 found = true;
2285 ops = dev->rtnl_link_ops;
2286 if (!ops || !ops->dellink)
2287 return -EOPNOTSUPP;
2288 }
2289 }
2290
2291 if (!found)
2292 return -ENODEV;
2293
2294 for_each_netdev_safe(net, dev, aux) {
2295 if (dev->group == group) {
2296 const struct rtnl_link_ops *ops;
2297
2298 ops = dev->rtnl_link_ops;
2299 ops->dellink(dev, &list_kill);
2300 }
2301 }
2302 unregister_netdevice_many(&list_kill);
2303
2304 return 0;
2305}
2306
614732ea
TG		 2307int rtnl_delete_link(struct net_device *dev)
2308{
2309 const struct rtnl_link_ops *ops;
2310 LIST_HEAD(list_kill);
2311
2312 ops = dev->rtnl_link_ops;
2313 if (!ops || !ops->dellink)
2314 return -EOPNOTSUPP;
2315
2316 ops->dellink(dev, &list_kill);
2317 unregister_netdevice_many(&list_kill);
2318
2319 return 0;
2320}
2321EXPORT_SYMBOL_GPL(rtnl_delete_link);
2322
c21ef3e3
DA		 2323static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
2324 struct netlink_ext_ack *extack)
38f7b870 2325{
3b1e0a65 2326 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2327 struct net_device *dev;
2328 struct ifinfomsg *ifm;
2329 char ifname[IFNAMSIZ];
2330 struct nlattr *tb[IFLA_MAX+1];
2331 int err;
2332
c21ef3e3 2333 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2334 if (err < 0)
2335 return err;
2336
2337 if (tb[IFLA_IFNAME])
2338 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2339
2340 ifm = nlmsg_data(nlh);
2341 if (ifm->ifi_index > 0)
881d966b 2342 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2343 else if (tb[IFLA_IFNAME])
881d966b 2344 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2345 else if (tb[IFLA_GROUP])
2346 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2347 else
2348 return -EINVAL;
2349
2350 if (!dev)
2351 return -ENODEV;
2352
614732ea 2353 return rtnl_delete_link(dev);
38f7b870
PM		 2354}
2355
3729d502
PM		 2356int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2357{
2358 unsigned int old_flags;
2359 int err;
2360
2361 old_flags = dev->flags;
2362 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2363 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2364 if (err < 0)
2365 return err;
2366 }
2367
2368 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2369
a528c219 2370 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2371 return 0;
2372}
2373EXPORT_SYMBOL(rtnl_configure_link);
2374
c0713563 2375struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2376 const char *ifname, unsigned char name_assign_type,
5517750f 2377 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288 2378{
e7199288 2379 struct net_device *dev;
d40156aa
JP		 2380 unsigned int num_tx_queues = 1;
2381 unsigned int num_rx_queues = 1;
e7199288 2382
76ff5cc9
JP		 2383 if (tb[IFLA_NUM_TX_QUEUES])
2384 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2385 else if (ops->get_num_tx_queues)
d40156aa 2386 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2387
2388 if (tb[IFLA_NUM_RX_QUEUES])
2389 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2390 else if (ops->get_num_rx_queues)
d40156aa 2391 num_rx_queues = ops->get_num_rx_queues();
efacb309 2392
5517750f 2393 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2394 ops->setup, num_tx_queues, num_rx_queues);
e7199288 2395 if (!dev)
d1892e4e 2396 return ERR_PTR(-ENOMEM);
e7199288 2397
81adee47
EB		 2398 dev_net_set(dev, net);
2399 dev->rtnl_link_ops = ops;
3729d502 2400 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2401
e7199288
PE		 2402 if (tb[IFLA_MTU])
2403 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2404 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2405 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2406 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2407 dev->addr_assign_type = NET_ADDR_SET;
2408 }
e7199288
PE		 2409 if (tb[IFLA_BROADCAST])
2410 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2411 nla_len(tb[IFLA_BROADCAST]));
2412 if (tb[IFLA_TXQLEN])
2413 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2414 if (tb[IFLA_OPERSTATE])
93b2d4a2 2415 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2416 if (tb[IFLA_LINKMODE])
2417 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2418 if (tb[IFLA_GROUP])
2419 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2420
2421 return dev;
e7199288 2422}
e0d087af 2423EXPORT_SYMBOL(rtnl_create_link);
e7199288 2424
90f62cf3
EB		 2425static int rtnl_group_changelink(const struct sk_buff *skb,
2426 struct net *net, int group,
e7ed828f 2427 struct ifinfomsg *ifm,
ddf9f970 2428 struct netlink_ext_ack *extack,
e7ed828f
VD		 2429 struct nlattr **tb)
2430{
d079535d 2431 struct net_device *dev, *aux;
e7ed828f
VD		 2432 int err;
2433
d079535d 2434 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2435 if (dev->group == group) {
ddf9f970 2436 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
e7ed828f
VD		 2437 if (err < 0)
2438 return err;
2439 }
2440 }
2441
2442 return 0;
2443}
2444
c21ef3e3
DA		 2445static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2446 struct netlink_ext_ack *extack)
38f7b870 2447{
3b1e0a65 2448 struct net *net = sock_net(skb->sk);
38f7b870 2449 const struct rtnl_link_ops *ops;
ba7d49b1 2450 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2451 struct net_device *dev;
ba7d49b1 2452 struct net_device *master_dev = NULL;
38f7b870
PM		 2453 struct ifinfomsg *ifm;
2454 char kind[MODULE_NAME_LEN];
2455 char ifname[IFNAMSIZ];
2456 struct nlattr *tb[IFLA_MAX+1];
2457 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2458 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2459 int err;
2460
95a5afca 2461#ifdef CONFIG_MODULES
38f7b870 2462replay:
8072f085 2463#endif
c21ef3e3 2464 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
38f7b870
PM		 2465 if (err < 0)
2466 return err;
2467
2468 if (tb[IFLA_IFNAME])
2469 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2470 else
2471 ifname[0] = '\0';
2472
2473 ifm = nlmsg_data(nlh);
2474 if (ifm->ifi_index > 0)
881d966b 2475 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2476 else {
2477 if (ifname[0])
2478 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2479 else
2480 dev = NULL;
2481 }
38f7b870 2482
ba7d49b1
JP		 2483 if (dev) {
2484 master_dev = netdev_master_upper_dev_get(dev);
2485 if (master_dev)
2486 m_ops = master_dev->rtnl_link_ops;
2487 }
2488
e0d087af
ED		 2489 err = validate_linkmsg(dev, tb);
2490 if (err < 0)
1840bb13
TG		 2491 return err;
2492
38f7b870
PM		 2493 if (tb[IFLA_LINKINFO]) {
2494 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
fceb6435
JB		 2495 tb[IFLA_LINKINFO], ifla_info_policy,
2496 NULL);
38f7b870
PM		 2497 if (err < 0)
2498 return err;
2499 } else
2500 memset(linkinfo, 0, sizeof(linkinfo));
2501
2502 if (linkinfo[IFLA_INFO_KIND]) {
2503 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2504 ops = rtnl_link_ops_get(kind);
2505 } else {
2506 kind[0] = '\0';
2507 ops = NULL;
2508 }
2509
2510 if (1) {
4e10fd5b
SL		 2511 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2512 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2513 struct nlattr **data = NULL;
2514 struct nlattr **slave_data = NULL;
317f4810 2515 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2516
2517 if (ops) {
2518 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2519 err = nla_parse_nested(attr, ops->maxtype,
2520 linkinfo[IFLA_INFO_DATA],
fceb6435 2521 ops->policy, NULL);
38f7b870
PM		 2522 if (err < 0)
2523 return err;
2524 data = attr;
2525 }
2526 if (ops->validate) {
2527 err = ops->validate(tb, data);
2528 if (err < 0)
2529 return err;
2530 }
2531 }
2532
ba7d49b1
JP		 2533 if (m_ops) {
2534 if (m_ops->slave_maxtype &&
2535 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2536 err = nla_parse_nested(slave_attr,
2537 m_ops->slave_maxtype,
2538 linkinfo[IFLA_INFO_SLAVE_DATA],
fceb6435
JB		 2539 m_ops->slave_policy,
2540 NULL);
ba7d49b1
JP		 2541 if (err < 0)
2542 return err;
2543 slave_data = slave_attr;
2544 }
2545 if (m_ops->slave_validate) {
2546 err = m_ops->slave_validate(tb, slave_data);
2547 if (err < 0)
2548 return err;
2549 }
2550 }
2551
38f7b870 2552 if (dev) {
90c325e3 2553 int status = 0;
38f7b870
PM		 2554
2555 if (nlh->nlmsg_flags & NLM_F_EXCL)
2556 return -EEXIST;
2557 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2558 return -EOPNOTSUPP;
2559
2560 if (linkinfo[IFLA_INFO_DATA]) {
2561 if (!ops || ops != dev->rtnl_link_ops ||
2562 !ops->changelink)
2563 return -EOPNOTSUPP;
2564
2565 err = ops->changelink(dev, tb, data);
2566 if (err < 0)
2567 return err;
ba998906 2568 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2569 }
2570
ba7d49b1
JP		 2571 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2572 if (!m_ops || !m_ops->slave_changelink)
2573 return -EOPNOTSUPP;
2574
2575 err = m_ops->slave_changelink(master_dev, dev,
2576 tb, slave_data);
2577 if (err < 0)
2578 return err;
ba998906 2579 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2580 }
2581
ddf9f970
JK		 2582 return do_setlink(skb, dev, ifm, extack, tb, ifname,
2583 status);
38f7b870
PM		 2584 }
2585
ffa934f1
PM		 2586 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2587 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2588 return rtnl_group_changelink(skb, net,
ffa934f1 2589 nla_get_u32(tb[IFLA_GROUP]),
ddf9f970 2590 ifm, extack, tb);
38f7b870 2591 return -ENODEV;
ffa934f1 2592 }
38f7b870 2593
160ca014 2594 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
38f7b870
PM		 2595 return -EOPNOTSUPP;
2596
2597 if (!ops) {
95a5afca 2598#ifdef CONFIG_MODULES
38f7b870
PM		 2599 if (kind[0]) {
2600 __rtnl_unlock();
2601 request_module("rtnl-link-%s", kind);
2602 rtnl_lock();
2603 ops = rtnl_link_ops_get(kind);
2604 if (ops)
2605 goto replay;
2606 }
2607#endif
2608 return -EOPNOTSUPP;
2609 }
2610
b0ab2fab
JP		 2611 if (!ops->setup)
2612 return -EOPNOTSUPP;
2613
5517750f 2614 if (!ifname[0]) {
38f7b870 2615 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2616 name_assign_type = NET_NAME_ENUM;
2617 }
e7199288 2618
81adee47 2619 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2620 if (IS_ERR(dest_net))
2621 return PTR_ERR(dest_net);
2622
505ce415
EB		 2623 err = -EPERM;
2624 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2625 goto out;
2626
317f4810
ND		 2627 if (tb[IFLA_LINK_NETNSID]) {
2628 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2629
2630 link_net = get_net_ns_by_id(dest_net, id);
2631 if (!link_net) {
2632 err = -EINVAL;
2633 goto out;
2634 }
06615bed
EB		 2635 err = -EPERM;
2636 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2637 goto out;
317f4810
ND		 2638 }
2639
2640 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2641 name_assign_type, ops, tb);
9c7dafbf 2642 if (IS_ERR(dev)) {
e7199288 2643 err = PTR_ERR(dev);
9c7dafbf
PE		 2644 goto out;
2645 }
2646
2647 dev->ifindex = ifm->ifi_index;
2648
0e0eee24 2649 if (ops->newlink) {
7b4ce694 2650 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2651 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2652 * and unregister it on failure after registration
2653 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2654 */
e51fb152
CW		 2655 if (err < 0) {
2656 /* If device is not registered at all, free it now */
2657 if (dev->reg_state == NETREG_UNINITIALIZED)
2658 free_netdev(dev);
0e0eee24 2659 goto out;
e51fb152 2660 }
0e0eee24 2661 } else {
2d85cba2 2662 err = register_netdevice(dev);
0e0eee24
CW		 2663 if (err < 0) {
2664 free_netdev(dev);
2665 goto out;
2666 }
fce9b9be 2667 }
3729d502 2668 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2669 if (err < 0)
2670 goto out_unregister;
bdef279b 2671 if (link_net) {
317f4810 2672 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2673 if (err < 0)
43638900 2674 goto out_unregister;
bdef279b 2675 }
160ca014
TV		 2676 if (tb[IFLA_MASTER]) {
2677 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2678 if (err)
2679 goto out_unregister;
2680 }
3729d502 2681out:
317f4810
ND		 2682 if (link_net)
2683 put_net(link_net);
81adee47 2684 put_net(dest_net);
38f7b870 2685 return err;
43638900
DM		 2686out_unregister:
2687 if (ops->newlink) {
2688 LIST_HEAD(list_kill);
2689
2690 ops->dellink(dev, &list_kill);
2691 unregister_netdevice_many(&list_kill);
2692 } else {
2693 unregister_netdevice(dev);
2694 }
2695 goto out;
38f7b870
PM		 2696 }
2697}
2698
c21ef3e3
DA		 2699static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2700 struct netlink_ext_ack *extack)
711e2c33 2701{
3b1e0a65 2702 struct net *net = sock_net(skb->sk);
b60c5115 2703 struct ifinfomsg *ifm;
a3d12891 2704 char ifname[IFNAMSIZ];
b60c5115
TG		 2705 struct nlattr *tb[IFLA_MAX+1];
2706 struct net_device *dev = NULL;
2707 struct sk_buff *nskb;
339bf98f 2708 int err;
115c9b81 2709 u32 ext_filter_mask = 0;
711e2c33 2710
c21ef3e3 2711 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
b60c5115 2712 if (err < 0)
9918f230 2713 return err;
b60c5115 2714
a3d12891
ED		 2715 if (tb[IFLA_IFNAME])
2716 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2717
115c9b81
GR		 2718 if (tb[IFLA_EXT_MASK])
2719 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2720
b60c5115 2721 ifm = nlmsg_data(nlh);
a3d12891
ED		 2722 if (ifm->ifi_index > 0)
2723 dev = __dev_get_by_index(net, ifm->ifi_index);
2724 else if (tb[IFLA_IFNAME])
2725 dev = __dev_get_by_name(net, ifname);
2726 else
711e2c33 2727 return -EINVAL;
711e2c33 2728
a3d12891
ED		 2729 if (dev == NULL)
2730 return -ENODEV;
2731
115c9b81 2732 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2733 if (nskb == NULL)
2734 return -ENOBUFS;
b60c5115 2735
15e47304 2736 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
bf74b20d 2737 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2738 if (err < 0) {
2739 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2740 WARN_ON(err == -EMSGSIZE);
2741 kfree_skb(nskb);
a3d12891 2742 } else
15e47304 2743 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2744
b60c5115 2745 return err;
711e2c33 2746}
711e2c33 2747
115c9b81 2748static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2749{
115c9b81
GR		 2750 struct net *net = sock_net(skb->sk);
2751 struct net_device *dev;
2752 struct nlattr *tb[IFLA_MAX+1];
2753 u32 ext_filter_mask = 0;
2754 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2755 int hdrlen;
2756
2757 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2758 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2759 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2760
fceb6435 2761 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
a4b64fbe
ED		 2762 if (tb[IFLA_EXT_MASK])
2763 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2764 }
115c9b81
GR		 2765
2766 if (!ext_filter_mask)
2767 return NLMSG_GOODSIZE;
2768 /*
2769 * traverse the list of net devices and compute the minimum
2770 * buffer size based upon the filter mask.
2771 */
2772 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2773 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2774 if_nlmsg_size(dev,
2775 ext_filter_mask));
2776 }
2777
93af2056 2778 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 2779}
2780
42bad1da 2781static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2782{
2783 int idx;
2784 int s_idx = cb->family;
2785
2786 if (s_idx == 0)
2787 s_idx = 1;
25239cee 2788 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2789 int type = cb->nlh->nlmsg_type-RTM_BASE;
2790 if (idx < s_idx || idx == PF_PACKET)
2791 continue;
e2849863
TG		 2792 if (rtnl_msg_handlers[idx] == NULL ||
2793 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2794 continue;
0465277f 2795 if (idx > s_idx) {
1da177e4 2796 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2797 cb->prev_seq = 0;
2798 cb->seq = 0;
2799 }
e2849863 2800 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2801 break;
2802 }
2803 cb->family = idx;
2804
2805 return skb->len;
2806}
2807
395eea6c 2808struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
bf74b20d 2809 unsigned int change, gfp_t flags)
1da177e4 2810{
c346dca1 2811 struct net *net = dev_net(dev);
1da177e4 2812 struct sk_buff *skb;
0ec6d3f4 2813 int err = -ENOBUFS;
c7ac8679 2814 size_t if_info_size;
1da177e4 2815
7f294054 2816 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2817 if (skb == NULL)
2818 goto errout;
1da177e4 2819
bf74b20d 2820 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2821 if (err < 0) {
2822 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2823 WARN_ON(err == -EMSGSIZE);
2824 kfree_skb(skb);
2825 goto errout;
2826 }
395eea6c 2827 return skb;
0ec6d3f4
TG		 2828errout:
2829 if (err < 0)
4b3da706 2830 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2831 return NULL;
2832}
2833
2834void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2835{
2836 struct net *net = dev_net(dev);
2837
2838 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2839}
2840
bf74b20d
DM		 2841void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2842 gfp_t flags)
395eea6c
MB		 2843{
2844 struct sk_buff *skb;
2845
ed2a80ab
ND		 2846 if (dev->reg_state != NETREG_REGISTERED)
2847 return;
2848
bf74b20d 2849 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
395eea6c
MB		 2850 if (skb)
2851 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2852}
471cb5a3 2853EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2854
d83b0603
JF		 2855static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2856 struct net_device *dev,
1e53d5bb 2857 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2858 int type, unsigned int flags,
b3379041 2859 int nlflags, u16 ndm_state)
d83b0603
JF		 2860{
2861 struct nlmsghdr *nlh;
2862 struct ndmsg *ndm;
2863
1c104a6b 2864 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2865 if (!nlh)
2866 return -EMSGSIZE;
2867
2868 ndm = nlmsg_data(nlh);
2869 ndm->ndm_family = AF_BRIDGE;
2870 ndm->ndm_pad1 = 0;
2871 ndm->ndm_pad2 = 0;
2872 ndm->ndm_flags = flags;
2873 ndm->ndm_type = 0;
2874 ndm->ndm_ifindex = dev->ifindex;
b3379041 2875 ndm->ndm_state = ndm_state;
d83b0603
JF		 2876
2877 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2878 goto nla_put_failure;
1e53d5bb
HS		 2879 if (vid)
2880 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2881 goto nla_put_failure;
d83b0603 2882
053c095a
JB		 2883 nlmsg_end(skb, nlh);
2884 return 0;
d83b0603
JF		 2885
2886nla_put_failure:
2887 nlmsg_cancel(skb, nlh);
2888 return -EMSGSIZE;
2889}
2890
3ff661c3
JF		 2891static inline size_t rtnl_fdb_nlmsg_size(void)
2892{
f82ef3e1
SD		 2893 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2894 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2895 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2896 0;
3ff661c3
JF		 2897}
2898
b3379041
HS		 2899static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2900 u16 ndm_state)
3ff661c3
JF		 2901{
2902 struct net *net = dev_net(dev);
2903 struct sk_buff *skb;
2904 int err = -ENOBUFS;
2905
2906 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2907 if (!skb)
2908 goto errout;
2909
1e53d5bb 2910 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2911 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2912 if (err < 0) {
2913 kfree_skb(skb);
2914 goto errout;
2915 }
2916
2917 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2918 return;
2919errout:
2920 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2921}
2922
090096bf
VY		 2923/**
2924 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2925 */
2926int ndo_dflt_fdb_add(struct ndmsg *ndm,
2927 struct nlattr *tb[],
2928 struct net_device *dev,
f6f6424b 2929 const unsigned char *addr, u16 vid,
090096bf
VY		 2930 u16 flags)
2931{
2932 int err = -EINVAL;
2933
2934 /* If aging addresses are supported device will need to
2935 * implement its own handler for this.
2936 */
2937 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2938 pr_info("%s: FDB only supports static addresses\n", dev->name);
2939 return err;
2940 }
2941
65891fea
OG		 2942 if (vid) {
2943 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2944 return err;
2945 }
2946
090096bf
VY		 2947 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2948 err = dev_uc_add_excl(dev, addr);
2949 else if (is_multicast_ether_addr(addr))
2950 err = dev_mc_add_excl(dev, addr);
2951
2952 /* Only return duplicate errors if NLM_F_EXCL is set */
2953 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2954 err = 0;
2955
2956 return err;
2957}
2958EXPORT_SYMBOL(ndo_dflt_fdb_add);
2959
f6f6424b
JP		 2960static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2961{
2962 u16 vid = 0;
2963
2964 if (vlan_attr) {
2965 if (nla_len(vlan_attr) != sizeof(u16)) {
2966 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2967 return -EINVAL;
2968 }
2969
2970 vid = nla_get_u16(vlan_attr);
2971
2972 if (!vid || vid >= VLAN_VID_MASK) {
2973 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2974 vid);
2975 return -EINVAL;
2976 }
2977 }
2978 *p_vid = vid;
2979 return 0;
2980}
2981
c21ef3e3
DA		 2982static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
2983 struct netlink_ext_ack *extack)
77162022
JF		 2984{
2985 struct net *net = sock_net(skb->sk);
77162022
JF		 2986 struct ndmsg *ndm;
2987 struct nlattr *tb[NDA_MAX+1];
2988 struct net_device *dev;
2989 u8 *addr;
f6f6424b 2990 u16 vid;
77162022
JF		 2991 int err;
2992
c21ef3e3 2993 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
77162022
JF		 2994 if (err < 0)
2995 return err;
2996
2997 ndm = nlmsg_data(nlh);
2998 if (ndm->ndm_ifindex == 0) {
2999 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
3000 return -EINVAL;
3001 }
3002
3003 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3004 if (dev == NULL) {
3005 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
3006 return -ENODEV;
3007 }
3008
3009 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3010 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
3011 return -EINVAL;
3012 }
3013
3014 addr = nla_data(tb[NDA_LLADDR]);
77162022 3015
f6f6424b
JP		 3016 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3017 if (err)
3018 return err;
3019
77162022
JF		 3020 err = -EOPNOTSUPP;
3021
3022 /* Support fdb on master device the net/bridge default case */
3023 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3024 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3025 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3026 const struct net_device_ops *ops = br_dev->netdev_ops;
3027
f6f6424b
JP		 3028 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3029 nlh->nlmsg_flags);
77162022
JF		 3030 if (err)
3031 goto out;
3032 else
3033 ndm->ndm_flags &= ~NTF_MASTER;
3034 }
3035
3036 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3037 if ((ndm->ndm_flags & NTF_SELF)) {
3038 if (dev->netdev_ops->ndo_fdb_add)
3039 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 3040 vid,
090096bf
VY		 3041 nlh->nlmsg_flags);
3042 else
f6f6424b 3043 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 3044 nlh->nlmsg_flags);
77162022 3045
3ff661c3 3046 if (!err) {
b3379041
HS		 3047 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3048 ndm->ndm_state);
77162022 3049 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3050 }
77162022
JF		 3051 }
3052out:
3053 return err;
3054}
3055
090096bf
VY		 3056/**
3057 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3058 */
3059int ndo_dflt_fdb_del(struct ndmsg *ndm,
3060 struct nlattr *tb[],
3061 struct net_device *dev,
f6f6424b 3062 const unsigned char *addr, u16 vid)
090096bf 3063{
c8a89c4a 3064 int err = -EINVAL;
090096bf
VY		 3065
3066 /* If aging addresses are supported device will need to
3067 * implement its own handler for this.
3068 */
64535993 3069 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 3070 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 3071 return err;
090096bf
VY		 3072 }
3073
3074 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3075 err = dev_uc_del(dev, addr);
3076 else if (is_multicast_ether_addr(addr))
3077 err = dev_mc_del(dev, addr);
090096bf
VY		 3078
3079 return err;
3080}
3081EXPORT_SYMBOL(ndo_dflt_fdb_del);
3082
c21ef3e3
DA		 3083static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
3084 struct netlink_ext_ack *extack)
77162022
JF		 3085{
3086 struct net *net = sock_net(skb->sk);
3087 struct ndmsg *ndm;
1690be63 3088 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 3089 struct net_device *dev;
3090 int err = -EINVAL;
3091 __u8 *addr;
f6f6424b 3092 u16 vid;
77162022 3093
90f62cf3 3094 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 3095 return -EPERM;
3096
c21ef3e3 3097 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
1690be63
VY		 3098 if (err < 0)
3099 return err;
77162022
JF		 3100
3101 ndm = nlmsg_data(nlh);
3102 if (ndm->ndm_ifindex == 0) {
3103 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3104 return -EINVAL;
3105 }
3106
3107 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3108 if (dev == NULL) {
3109 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3110 return -ENODEV;
3111 }
3112
1690be63
VY		 3113 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3114 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3115 return -EINVAL;
3116 }
3117
3118 addr = nla_data(tb[NDA_LLADDR]);
77162022 3119
f6f6424b
JP		 3120 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3121 if (err)
3122 return err;
3123
77162022
JF		 3124 err = -EOPNOTSUPP;
3125
3126 /* Support fdb on master device the net/bridge default case */
3127 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3128 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3129 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3130 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 3131
898e5061 3132 if (ops->ndo_fdb_del)
f6f6424b 3133 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 3134
3135 if (err)
3136 goto out;
3137 else
3138 ndm->ndm_flags &= ~NTF_MASTER;
3139 }
3140
3141 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3142 if (ndm->ndm_flags & NTF_SELF) {
3143 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 3144 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3145 vid);
090096bf 3146 else
f6f6424b 3147 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 3148
3ff661c3 3149 if (!err) {
b3379041
HS		 3150 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3151 ndm->ndm_state);
77162022 3152 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3153 }
77162022
JF		 3154 }
3155out:
3156 return err;
3157}
3158
d83b0603
JF		 3159static int nlmsg_populate_fdb(struct sk_buff *skb,
3160 struct netlink_callback *cb,
3161 struct net_device *dev,
3162 int *idx,
3163 struct netdev_hw_addr_list *list)
3164{
3165 struct netdev_hw_addr *ha;
3166 int err;
15e47304 3167 u32 portid, seq;
d83b0603 3168
15e47304 3169 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 3170 seq = cb->nlh->nlmsg_seq;
3171
3172 list_for_each_entry(ha, &list->list, list) {
d297653d 3173 if (*idx < cb->args[2])
d83b0603
JF		 3174 goto skip;
3175
1e53d5bb 3176 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 3177 portid, seq,
1c104a6b 3178 RTM_NEWNEIGH, NTF_SELF,
b3379041 3179 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 3180 if (err < 0)
3181 return err;
3182skip:
3183 *idx += 1;
3184 }
3185 return 0;
3186}
3187
3188/**
2c53040f 3189 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 3190 * @nlh: netlink message header
3191 * @dev: netdevice
3192 *
3193 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 3194 * Returns number of addresses from list put in skb.
d83b0603
JF		 3195 */
3196int ndo_dflt_fdb_dump(struct sk_buff *skb,
3197 struct netlink_callback *cb,
3198 struct net_device *dev,
5d5eacb3 3199 struct net_device *filter_dev,
d297653d 3200 int *idx)
d83b0603
JF		 3201{
3202 int err;
3203
3204 netif_addr_lock_bh(dev);
d297653d 3205 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 3206 if (err)
3207 goto out;
2934c9db 3208 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 3209out:
3210 netif_addr_unlock_bh(dev);
d297653d 3211 return err;
d83b0603
JF		 3212}
3213EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3214
77162022
JF		 3215static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3216{
77162022 3217 struct net_device *dev;
5e6d2435 3218 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3219 struct net_device *br_dev = NULL;
3220 const struct net_device_ops *ops = NULL;
3221 const struct net_device_ops *cops = NULL;
3222 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3223 struct net *net = sock_net(skb->sk);
d297653d 3224 struct hlist_head *head;
5e6d2435
JHS		 3225 int brport_idx = 0;
3226 int br_idx = 0;
d297653d
RP		 3227 int h, s_h;
3228 int idx = 0, s_idx;
3229 int err = 0;
3230 int fidx = 0;
5e6d2435 3231
fceb6435
JB		 3232 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
3233 IFLA_MAX, ifla_policy, NULL) == 0) {
5e6d2435
JHS		 3234 if (tb[IFLA_MASTER])
3235 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3236 }
3237
3238 brport_idx = ifm->ifi_index;
3239
3240 if (br_idx) {
3241 br_dev = __dev_get_by_index(net, br_idx);
3242 if (!br_dev)
3243 return -ENODEV;
3244
3245 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3246 }
3247
d297653d
RP		 3248 s_h = cb->args[0];
3249 s_idx = cb->args[1];
5e6d2435 3250
d297653d
RP		 3251 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3252 idx = 0;
3253 head = &net->dev_index_head[h];
3254 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 3255
d297653d 3256 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 3257 continue;
3258
d297653d
RP		 3259 if (!br_idx) { /* user did not specify a specific bridge */
3260 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3261 br_dev = netdev_master_upper_dev_get(dev);
3262 cops = br_dev->netdev_ops;
3263 }
3264 } else {
3265 if (dev != br_dev &&
3266 !(dev->priv_flags & IFF_BRIDGE_PORT))
3267 continue;
5e6d2435 3268
d297653d
RP		 3269 if (br_dev != netdev_master_upper_dev_get(dev) &&
3270 !(dev->priv_flags & IFF_EBRIDGE))
3271 continue;
3272 cops = ops;
3273 }
77162022 3274
d297653d
RP		 3275 if (idx < s_idx)
3276 goto cont;
77162022 3277
d297653d
RP		 3278 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3279 if (cops && cops->ndo_fdb_dump) {
3280 err = cops->ndo_fdb_dump(skb, cb,
3281 br_dev, dev,
3282 &fidx);
3283 if (err == -EMSGSIZE)
3284 goto out;
3285 }
3286 }
5e6d2435 3287
d297653d
RP		 3288 if (dev->netdev_ops->ndo_fdb_dump)
3289 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3290 dev, NULL,
3291 &fidx);
3292 else
3293 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3294 &fidx);
3295 if (err == -EMSGSIZE)
3296 goto out;
3297
3298 cops = NULL;
3299
3300 /* reset fdb offset to 0 for rest of the interfaces */
3301 cb->args[2] = 0;
3302 fidx = 0;
3303cont:
3304 idx++;
3305 }
77162022 3306 }
77162022 3307
d297653d
RP		 3308out:
3309 cb->args[0] = h;
3310 cb->args[1] = idx;
3311 cb->args[2] = fidx;
3312
77162022
JF		 3313 return skb->len;
3314}
3315
2c3c031c
SF		 3316static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3317 unsigned int attrnum, unsigned int flag)
3318{
3319 if (mask & flag)
3320 return nla_put_u8(skb, attrnum, !!(flags & flag));
3321 return 0;
3322}
3323
815cccbf 3324int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3325 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3326 u32 flags, u32 mask, int nlflags,
3327 u32 filter_mask,
3328 int (*vlan_fill)(struct sk_buff *skb,
3329 struct net_device *dev,
3330 u32 filter_mask))
815cccbf
JF		 3331{
3332 struct nlmsghdr *nlh;
3333 struct ifinfomsg *ifm;
3334 struct nlattr *br_afspec;
2c3c031c 3335 struct nlattr *protinfo;
815cccbf 3336 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3337 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3338 int err = 0;
815cccbf 3339
46c264da 3340 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3341 if (nlh == NULL)
3342 return -EMSGSIZE;
3343
3344 ifm = nlmsg_data(nlh);
3345 ifm->ifi_family = AF_BRIDGE;
3346 ifm->__ifi_pad = 0;
3347 ifm->ifi_type = dev->type;
3348 ifm->ifi_index = dev->ifindex;
3349 ifm->ifi_flags = dev_get_flags(dev);
3350 ifm->ifi_change = 0;
3351
3352
3353 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3354 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3355 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3356 (br_dev &&
3357 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3358 (dev->addr_len &&
3359 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3360 (dev->ifindex != dev_get_iflink(dev) &&
3361 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3362 goto nla_put_failure;
3363
3364 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3365 if (!br_afspec)
3366 goto nla_put_failure;
3367
1d460b98 3368 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3369 nla_nest_cancel(skb, br_afspec);
3370 goto nla_put_failure;
3371 }
1d460b98
RP		 3372
3373 if (mode != BRIDGE_MODE_UNDEF) {
3374 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3375 nla_nest_cancel(skb, br_afspec);
3376 goto nla_put_failure;
3377 }
3378 }
7d4f8d87
SF		 3379 if (vlan_fill) {
3380 err = vlan_fill(skb, dev, filter_mask);
3381 if (err) {
3382 nla_nest_cancel(skb, br_afspec);
3383 goto nla_put_failure;
3384 }
3385 }
815cccbf
JF		 3386 nla_nest_end(skb, br_afspec);
3387
2c3c031c
SF		 3388 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3389 if (!protinfo)
3390 goto nla_put_failure;
3391
3392 if (brport_nla_put_flag(skb, flags, mask,
3393 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3394 brport_nla_put_flag(skb, flags, mask,
3395 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3396 brport_nla_put_flag(skb, flags, mask,
3397 IFLA_BRPORT_FAST_LEAVE,
3398 BR_MULTICAST_FAST_LEAVE) ||
3399 brport_nla_put_flag(skb, flags, mask,
3400 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3401 brport_nla_put_flag(skb, flags, mask,
3402 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3403 brport_nla_put_flag(skb, flags, mask,
3404 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3405 brport_nla_put_flag(skb, flags, mask,
3406 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3407 brport_nla_put_flag(skb, flags, mask,
3408 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3409 nla_nest_cancel(skb, protinfo);
3410 goto nla_put_failure;
3411 }
3412
3413 nla_nest_end(skb, protinfo);
3414
053c095a
JB		 3415 nlmsg_end(skb, nlh);
3416 return 0;
815cccbf
JF		 3417nla_put_failure:
3418 nlmsg_cancel(skb, nlh);
7d4f8d87 3419 return err ? err : -EMSGSIZE;
815cccbf 3420}
7d4f8d87 3421EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3422
e5a55a89
JF		 3423static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3424{
3425 struct net *net = sock_net(skb->sk);
3426 struct net_device *dev;
3427 int idx = 0;
3428 u32 portid = NETLINK_CB(cb->skb).portid;
3429 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3430 u32 filter_mask = 0;
d64f69b0 3431 int err;
6cbdceeb 3432
aa68c20f
TG		 3433 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3434 struct nlattr *extfilt;
3435
3436 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3437 IFLA_EXT_MASK);
3438 if (extfilt) {
3439 if (nla_len(extfilt) < sizeof(filter_mask))
3440 return -EINVAL;
3441
3442 filter_mask = nla_get_u32(extfilt);
3443 }
3444 }
e5a55a89
JF		 3445
3446 rcu_read_lock();
3447 for_each_netdev_rcu(net, dev) {
3448 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3449 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3450
898e5061 3451 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3452 if (idx >= cb->args[0]) {
3453 err = br_dev->netdev_ops->ndo_bridge_getlink(
3454 skb, portid, seq, dev,
3455 filter_mask, NLM_F_MULTI);
3456 if (err < 0 && err != -EOPNOTSUPP)
3457 break;
3458 }
25b1e679 3459 idx++;
e5a55a89
JF		 3460 }
3461
3462 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3463 if (idx >= cb->args[0]) {
3464 err = ops->ndo_bridge_getlink(skb, portid,
3465 seq, dev,
3466 filter_mask,
3467 NLM_F_MULTI);
3468 if (err < 0 && err != -EOPNOTSUPP)
3469 break;
3470 }
25b1e679 3471 idx++;
e5a55a89
JF		 3472 }
3473 }
3474 rcu_read_unlock();
3475 cb->args[0] = idx;
3476
3477 return skb->len;
3478}
3479
2469ffd7
JF		 3480static inline size_t bridge_nlmsg_size(void)
3481{
3482 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3483 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3484 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3485 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3486 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3487 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3488 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3489 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3490 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3491 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3492 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3493}
3494
02dba438 3495static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3496{
3497 struct net *net = dev_net(dev);
2469ffd7
JF		 3498 struct sk_buff *skb;
3499 int err = -EOPNOTSUPP;
3500
02dba438
RP		 3501 if (!dev->netdev_ops->ndo_bridge_getlink)
3502 return 0;
3503
2469ffd7
JF		 3504 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3505 if (!skb) {
3506 err = -ENOMEM;
3507 goto errout;
3508 }
3509
46c264da 3510 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3511 if (err < 0)
3512 goto errout;
2469ffd7 3513
59ccaaaa
RP		 3514 if (!skb->len)
3515 goto errout;
3516
2469ffd7
JF		 3517 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3518 return 0;
3519errout:
3520 WARN_ON(err == -EMSGSIZE);
3521 kfree_skb(skb);
59ccaaaa
RP		 3522 if (err)
3523 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3524 return err;
3525}
3526
c21ef3e3
DA		 3527static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3528 struct netlink_ext_ack *extack)
e5a55a89
JF		 3529{
3530 struct net *net = sock_net(skb->sk);
3531 struct ifinfomsg *ifm;
3532 struct net_device *dev;
2469ffd7
JF		 3533 struct nlattr *br_spec, *attr = NULL;
3534 int rem, err = -EOPNOTSUPP;
4de8b413 3535 u16 flags = 0;
c38e01b8 3536 bool have_flags = false;
e5a55a89
JF		 3537
3538 if (nlmsg_len(nlh) < sizeof(*ifm))
3539 return -EINVAL;
3540
3541 ifm = nlmsg_data(nlh);
3542 if (ifm->ifi_family != AF_BRIDGE)
3543 return -EPFNOSUPPORT;
3544
3545 dev = __dev_get_by_index(net, ifm->ifi_index);
3546 if (!dev) {
3547 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3548 return -ENODEV;
3549 }
3550
2469ffd7
JF		 3551 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3552 if (br_spec) {
3553 nla_for_each_nested(attr, br_spec, rem) {
3554 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3555 if (nla_len(attr) < sizeof(flags))
3556 return -EINVAL;
3557
c38e01b8 3558 have_flags = true;
2469ffd7
JF		 3559 flags = nla_get_u16(attr);
3560 break;
3561 }
3562 }
3563 }
3564
3565 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3566 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3567
3568 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3569 err = -EOPNOTSUPP;
3570 goto out;
3571 }
3572
add511b3 3573 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3574 if (err)
3575 goto out;
2469ffd7
JF		 3576
3577 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3578 }
3579
2469ffd7
JF		 3580 if ((flags & BRIDGE_FLAGS_SELF)) {
3581 if (!dev->netdev_ops->ndo_bridge_setlink)
3582 err = -EOPNOTSUPP;
3583 else
add511b3
RP		 3584 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3585 flags);
02dba438 3586 if (!err) {
2469ffd7 3587 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3588
3589 /* Generate event to notify upper layer of bridge
3590 * change
3591 */
3592 err = rtnl_bridge_notify(dev);
3593 }
2469ffd7 3594 }
e5a55a89 3595
c38e01b8 3596 if (have_flags)
2469ffd7 3597 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3598out:
3599 return err;
3600}
3601
c21ef3e3
DA		 3602static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3603 struct netlink_ext_ack *extack)
407af329
VY		 3604{
3605 struct net *net = sock_net(skb->sk);
3606 struct ifinfomsg *ifm;
3607 struct net_device *dev;
3608 struct nlattr *br_spec, *attr = NULL;
3609 int rem, err = -EOPNOTSUPP;
4de8b413 3610 u16 flags = 0;
407af329
VY		 3611 bool have_flags = false;
3612
3613 if (nlmsg_len(nlh) < sizeof(*ifm))
3614 return -EINVAL;
3615
3616 ifm = nlmsg_data(nlh);
3617 if (ifm->ifi_family != AF_BRIDGE)
3618 return -EPFNOSUPPORT;
3619
3620 dev = __dev_get_by_index(net, ifm->ifi_index);
3621 if (!dev) {
3622 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3623 return -ENODEV;
3624 }
3625
3626 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3627 if (br_spec) {
3628 nla_for_each_nested(attr, br_spec, rem) {
3629 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3630 if (nla_len(attr) < sizeof(flags))
3631 return -EINVAL;
3632
407af329
VY		 3633 have_flags = true;
3634 flags = nla_get_u16(attr);
3635 break;
3636 }
3637 }
3638 }
3639
407af329
VY		 3640 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3641 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3642
3643 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3644 err = -EOPNOTSUPP;
3645 goto out;
3646 }
3647
add511b3 3648 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3649 if (err)
3650 goto out;
3651
3652 flags &= ~BRIDGE_FLAGS_MASTER;
3653 }
3654
3655 if ((flags & BRIDGE_FLAGS_SELF)) {
3656 if (!dev->netdev_ops->ndo_bridge_dellink)
3657 err = -EOPNOTSUPP;
3658 else
add511b3
RP		 3659 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3660 flags);
407af329 3661
02dba438 3662 if (!err) {
407af329 3663 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3664
3665 /* Generate event to notify upper layer of bridge
3666 * change
3667 */
3668 err = rtnl_bridge_notify(dev);
3669 }
407af329
VY		 3670 }
3671
3672 if (have_flags)
3673 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3674out:
3675 return err;
3676}
3677
e8872a25
NA		 3678static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3679{
3680 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3681 (!idxattr || idxattr == attrid);
3682}
3683
69ae6ad2
NF		 3684#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3685static int rtnl_get_offload_stats_attr_size(int attr_id)
3686{
3687 switch (attr_id) {
3688 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3689 return sizeof(struct rtnl_link_stats64);
3690 }
3691
3692 return 0;
3693}
3694
3695static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3696 int *prividx)
3697{
3698 struct nlattr *attr = NULL;
3699 int attr_id, size;
3700 void *attr_data;
3701 int err;
3702
3703 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3704 dev->netdev_ops->ndo_get_offload_stats))
3705 return -ENODATA;
3706
3707 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3708 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3709 if (attr_id < *prividx)
3710 continue;
3711
3712 size = rtnl_get_offload_stats_attr_size(attr_id);
3713 if (!size)
3714 continue;
3715
3df5b3c6 3716 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 3717 continue;
3718
3719 attr = nla_reserve_64bit(skb, attr_id, size,
3720 IFLA_OFFLOAD_XSTATS_UNSPEC);
3721 if (!attr)
3722 goto nla_put_failure;
3723
3724 attr_data = nla_data(attr);
3725 memset(attr_data, 0, size);
3726 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3727 attr_data);
3728 if (err)
3729 goto get_offload_stats_failure;
3730 }
3731
3732 if (!attr)
3733 return -ENODATA;
3734
3735 *prividx = 0;
3736 return 0;
3737
3738nla_put_failure:
3739 err = -EMSGSIZE;
3740get_offload_stats_failure:
3741 *prividx = attr_id;
3742 return err;
3743}
3744
3745static int rtnl_get_offload_stats_size(const struct net_device *dev)
3746{
3747 int nla_size = 0;
3748 int attr_id;
3749 int size;
3750
3751 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3752 dev->netdev_ops->ndo_get_offload_stats))
3753 return 0;
3754
3755 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3756 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3df5b3c6 3757 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 3758 continue;
3759 size = rtnl_get_offload_stats_attr_size(attr_id);
3760 nla_size += nla_total_size_64bit(size);
3761 }
3762
3763 if (nla_size != 0)
3764 nla_size += nla_total_size(0);
3765
3766 return nla_size;
3767}
3768
10c9ead9
RP		 3769static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3770 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 3771 unsigned int flags, unsigned int filter_mask,
3772 int *idxattr, int *prividx)
10c9ead9
RP		 3773{
3774 struct if_stats_msg *ifsm;
3775 struct nlmsghdr *nlh;
3776 struct nlattr *attr;
e8872a25 3777 int s_prividx = *prividx;
69ae6ad2 3778 int err;
10c9ead9
RP		 3779
3780 ASSERT_RTNL();
3781
3782 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3783 if (!nlh)
3784 return -EMSGSIZE;
3785
3786 ifsm = nlmsg_data(nlh);
3787 ifsm->ifindex = dev->ifindex;
3788 ifsm->filter_mask = filter_mask;
3789
e8872a25 3790 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 3791 struct rtnl_link_stats64 *sp;
10c9ead9 3792
58414d32
ND		 3793 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3794 sizeof(struct rtnl_link_stats64),
3795 IFLA_STATS_UNSPEC);
10c9ead9
RP		 3796 if (!attr)
3797 goto nla_put_failure;
3798
3799 sp = nla_data(attr);
3800 dev_get_stats(dev, sp);
3801 }
3802
97a47fac
NA		 3803 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3804 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3805
3806 if (ops && ops->fill_linkxstats) {
97a47fac
NA		 3807 *idxattr = IFLA_STATS_LINK_XSTATS;
3808 attr = nla_nest_start(skb,
3809 IFLA_STATS_LINK_XSTATS);
3810 if (!attr)
3811 goto nla_put_failure;
3812
80e73cc5
NA		 3813 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3814 nla_nest_end(skb, attr);
3815 if (err)
3816 goto nla_put_failure;
3817 *idxattr = 0;
3818 }
3819 }
3820
3821 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3822 *idxattr)) {
3823 const struct rtnl_link_ops *ops = NULL;
3824 const struct net_device *master;
3825
3826 master = netdev_master_upper_dev_get(dev);
3827 if (master)
3828 ops = master->rtnl_link_ops;
3829 if (ops && ops->fill_linkxstats) {
80e73cc5
NA		 3830 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3831 attr = nla_nest_start(skb,
3832 IFLA_STATS_LINK_XSTATS_SLAVE);
3833 if (!attr)
3834 goto nla_put_failure;
3835
3836 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 3837 nla_nest_end(skb, attr);
3838 if (err)
3839 goto nla_put_failure;
3840 *idxattr = 0;
3841 }
3842 }
3843
69ae6ad2
NF		 3844 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3845 *idxattr)) {
3846 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3847 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3848 if (!attr)
3849 goto nla_put_failure;
3850
3851 err = rtnl_get_offload_stats(skb, dev, prividx);
3852 if (err == -ENODATA)
3853 nla_nest_cancel(skb, attr);
3854 else
3855 nla_nest_end(skb, attr);
3856
3857 if (err && err != -ENODATA)
3858 goto nla_put_failure;
3859 *idxattr = 0;
3860 }
3861
aefb4d4a
RS		 3862 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3863 struct rtnl_af_ops *af_ops;
3864
3865 *idxattr = IFLA_STATS_AF_SPEC;
3866 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3867 if (!attr)
3868 goto nla_put_failure;
3869
3870 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3871 if (af_ops->fill_stats_af) {
3872 struct nlattr *af;
3873 int err;
3874
3875 af = nla_nest_start(skb, af_ops->family);
3876 if (!af)
3877 goto nla_put_failure;
3878
3879 err = af_ops->fill_stats_af(skb, dev);
3880
3881 if (err == -ENODATA)
3882 nla_nest_cancel(skb, af);
3883 else if (err < 0)
3884 goto nla_put_failure;
3885
3886 nla_nest_end(skb, af);
3887 }
3888 }
3889
3890 nla_nest_end(skb, attr);
3891
3892 *idxattr = 0;
3893 }
3894
10c9ead9
RP		 3895 nlmsg_end(skb, nlh);
3896
3897 return 0;
3898
3899nla_put_failure:
e8872a25
NA		 3900 /* not a multi message or no progress mean a real error */
3901 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3902 nlmsg_cancel(skb, nlh);
3903 else
3904 nlmsg_end(skb, nlh);
10c9ead9
RP		 3905
3906 return -EMSGSIZE;
3907}
3908
10c9ead9
RP		 3909static size_t if_nlmsg_stats_size(const struct net_device *dev,
3910 u32 filter_mask)
3911{
3912 size_t size = 0;
3913
e8872a25 3914 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 3915 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3916
97a47fac
NA		 3917 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3918 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 3919 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 3920
3921 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 3922 size += nla_total_size(ops->get_linkxstats_size(dev,
3923 attr));
97a47fac
NA		 3924 /* for IFLA_STATS_LINK_XSTATS */
3925 size += nla_total_size(0);
3926 }
3927 }
3928
80e73cc5
NA		 3929 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3930 struct net_device *_dev = (struct net_device *)dev;
3931 const struct rtnl_link_ops *ops = NULL;
3932 const struct net_device *master;
3933
3934 /* netdev_master_upper_dev_get can't take const */
3935 master = netdev_master_upper_dev_get(_dev);
3936 if (master)
3937 ops = master->rtnl_link_ops;
3938 if (ops && ops->get_linkxstats_size) {
3939 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3940
3941 size += nla_total_size(ops->get_linkxstats_size(dev,
3942 attr));
3943 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3944 size += nla_total_size(0);
3945 }
3946 }
3947
69ae6ad2
NF		 3948 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3949 size += rtnl_get_offload_stats_size(dev);
3950
aefb4d4a
RS		 3951 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
3952 struct rtnl_af_ops *af_ops;
3953
3954 /* for IFLA_STATS_AF_SPEC */
3955 size += nla_total_size(0);
3956
3957 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3958 if (af_ops->get_stats_af_size) {
3959 size += nla_total_size(
3960 af_ops->get_stats_af_size(dev));
3961
3962 /* for AF_* */
3963 size += nla_total_size(0);
3964 }
3965 }
3966 }
3967
10c9ead9
RP		 3968 return size;
3969}
3970
c21ef3e3
DA		 3971static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
3972 struct netlink_ext_ack *extack)
10c9ead9
RP		 3973{
3974 struct net *net = sock_net(skb->sk);
10c9ead9 3975 struct net_device *dev = NULL;
e8872a25
NA		 3976 int idxattr = 0, prividx = 0;
3977 struct if_stats_msg *ifsm;
10c9ead9
RP		 3978 struct sk_buff *nskb;
3979 u32 filter_mask;
3980 int err;
3981
4775cc1f
MK		 3982 if (nlmsg_len(nlh) < sizeof(*ifsm))
3983 return -EINVAL;
3984
10c9ead9
RP		 3985 ifsm = nlmsg_data(nlh);
3986 if (ifsm->ifindex > 0)
3987 dev = __dev_get_by_index(net, ifsm->ifindex);
3988 else
3989 return -EINVAL;
3990
3991 if (!dev)
3992 return -ENODEV;
3993
3994 filter_mask = ifsm->filter_mask;
3995 if (!filter_mask)
3996 return -EINVAL;
3997
3998 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3999 if (!nskb)
4000 return -ENOBUFS;
4001
4002 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
4003 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 4004 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 4005 if (err < 0) {
4006 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
4007 WARN_ON(err == -EMSGSIZE);
4008 kfree_skb(nskb);
4009 } else {
4010 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
4011 }
4012
4013 return err;
4014}
4015
4016static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
4017{
e8872a25 4018 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 4019 struct net *net = sock_net(skb->sk);
e8872a25 4020 unsigned int flags = NLM_F_MULTI;
10c9ead9 4021 struct if_stats_msg *ifsm;
10c9ead9 4022 struct hlist_head *head;
e8872a25 4023 struct net_device *dev;
10c9ead9 4024 u32 filter_mask = 0;
e8872a25 4025 int idx = 0;
10c9ead9
RP		 4026
4027 s_h = cb->args[0];
4028 s_idx = cb->args[1];
e8872a25
NA		 4029 s_idxattr = cb->args[2];
4030 s_prividx = cb->args[3];
10c9ead9
RP		 4031
4032 cb->seq = net->dev_base_seq;
4033
4775cc1f
MK		 4034 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4035 return -EINVAL;
4036
10c9ead9
RP		 4037 ifsm = nlmsg_data(cb->nlh);
4038 filter_mask = ifsm->filter_mask;
4039 if (!filter_mask)
4040 return -EINVAL;
4041
4042 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4043 idx = 0;
4044 head = &net->dev_index_head[h];
4045 hlist_for_each_entry(dev, head, index_hlist) {
4046 if (idx < s_idx)
4047 goto cont;
4048 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4049 NETLINK_CB(cb->skb).portid,
4050 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 4051 flags, filter_mask,
4052 &s_idxattr, &s_prividx);
10c9ead9
RP		 4053 /* If we ran out of room on the first message,
4054 * we're in trouble
4055 */
4056 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4057
4058 if (err < 0)
4059 goto out;
e8872a25
NA		 4060 s_prividx = 0;
4061 s_idxattr = 0;
10c9ead9
RP		 4062 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4063cont:
4064 idx++;
4065 }
4066 }
4067out:
e8872a25
NA		 4068 cb->args[3] = s_prividx;
4069 cb->args[2] = s_idxattr;
10c9ead9
RP		 4070 cb->args[1] = idx;
4071 cb->args[0] = h;
4072
4073 return skb->len;
4074}
4075
1da177e4
LT		 4076/* Process one rtnetlink message. */
4077
2d4bc933
JB		 4078static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4079 struct netlink_ext_ack *extack)
1da177e4 4080{
3b1e0a65 4081 struct net *net = sock_net(skb->sk);
e2849863 4082 rtnl_doit_func doit;
617cfc75 4083 int kind;
1da177e4
LT		 4084 int family;
4085 int type;
2907c35f 4086 int err;
1da177e4 4087
1da177e4 4088 type = nlh->nlmsg_type;
1da177e4 4089 if (type > RTM_MAX)
038890fe 4090 return -EOPNOTSUPP;
1da177e4
LT		 4091
4092 type -= RTM_BASE;
4093
4094 /* All the messages must have at least 1 byte length */
573ce260 4095 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 4096 return 0;
4097
573ce260 4098 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 4099 kind = type&3;
4100
90f62cf3 4101 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 4102 return -EPERM;
1da177e4 4103
b8f3ab42 4104 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 4105 struct sock *rtnl;
e2849863 4106 rtnl_dumpit_func dumpit;
c7ac8679
GR		 4107 rtnl_calcit_func calcit;
4108 u16 min_dump_alloc = 0;
1da177e4 4109
e2849863
TG		 4110 dumpit = rtnl_get_dumpit(family, type);
4111 if (dumpit == NULL)
038890fe 4112 return -EOPNOTSUPP;
c7ac8679
GR		 4113 calcit = rtnl_get_calcit(family, type);
4114 if (calcit)
115c9b81 4115 min_dump_alloc = calcit(skb, nlh);
9ac4a169 4116
2907c35f 4117 __rtnl_unlock();
97c53cac 4118 rtnl = net->rtnl;
80d326fa
PNA		 4119 {
4120 struct netlink_dump_control c = {
4121 .dump = dumpit,
4122 .min_dump_alloc = min_dump_alloc,
4123 };
4124 err = netlink_dump_start(rtnl, skb, nlh, &c);
4125 }
2907c35f
ED		 4126 rtnl_lock();
4127 return err;
1da177e4
LT		 4128 }
4129
e2849863
TG		 4130 doit = rtnl_get_doit(family, type);
4131 if (doit == NULL)
038890fe 4132 return -EOPNOTSUPP;
1da177e4 4133
c21ef3e3 4134 return doit(skb, nlh, extack);
1da177e4
LT		 4135}
4136
cd40b7d3 4137static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 4138{
cd40b7d3
DL		 4139 rtnl_lock();
4140 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4141 rtnl_unlock();
1da177e4
LT		 4142}
4143
1da177e4
LT		 4144static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4145{
351638e7 4146 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 4147
1da177e4 4148 switch (event) {
5138e86f 4149 case NETDEV_REBOOT:
5138e86f
VY		 4150 case NETDEV_CHANGENAME:
4151 case NETDEV_FEAT_CHANGE:
4152 case NETDEV_BONDING_FAILOVER:
5138e86f 4153 case NETDEV_NOTIFY_PEERS:
5138e86f 4154 case NETDEV_RESEND_IGMP:
5138e86f 4155 case NETDEV_CHANGEINFODATA:
bf74b20d 4156 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 4157 break;
4158 default:
1da177e4
LT		 4159 break;
4160 }
4161 return NOTIFY_DONE;
4162}
4163
4164static struct notifier_block rtnetlink_dev_notifier = {
4165 .notifier_call = rtnetlink_event,
4166};
4167
97c53cac 4168
2c8c1e72 4169static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 4170{
4171 struct sock *sk;
a31f2d17
PNA		 4172 struct netlink_kernel_cfg cfg = {
4173 .groups = RTNLGRP_MAX,
4174 .input = rtnetlink_rcv,
4175 .cb_mutex = &rtnl_mutex,
9785e10a 4176 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 4177 };
4178
9f00d977 4179 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 4180 if (!sk)
4181 return -ENOMEM;
97c53cac
DL		 4182 net->rtnl = sk;
4183 return 0;
4184}
4185
2c8c1e72 4186static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 4187{
775516bf
DL		 4188 netlink_kernel_release(net->rtnl);
4189 net->rtnl = NULL;
97c53cac
DL		 4190}
4191
4192static struct pernet_operations rtnetlink_net_ops = {
4193 .init = rtnetlink_net_init,
4194 .exit = rtnetlink_net_exit,
4195};
4196
1da177e4
LT		 4197void __init rtnetlink_init(void)
4198{
97c53cac 4199 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 4200 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 4201
1da177e4 4202 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 4203
c7ac8679
GR		 4204 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4205 rtnl_dump_ifinfo, rtnl_calcit);
4206 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4207 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4208 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 4209
c7ac8679
GR		 4210 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4211 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
a7678c70 4212 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
77162022
JF		 4213
4214 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4215 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4216 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 4217
4218 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 4219 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 4220 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
10c9ead9
RP		 4221
4222 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4223 NULL);
1da177e4 4224}
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