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netlink: extended ACK reporting
[mirror_ubuntu-bionic-kernel.git] / net / core / rtnetlink.c
CommitLineData
1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Routing netlink socket interface: protocol independent part.
7 *
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Fixes:
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
17 */
18
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
d1fdd913
BB		 899static size_t rtnl_xdp_size(const struct net_device *dev)
900{
b3cfaa31
SD		 901 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
902 nla_total_size(1); /* XDP_ATTACHED */
d1fdd913
BB		 903
904 if (!dev->netdev_ops->ndo_xdp)
905 return 0;
906 else
907 return xdp_size;
908}
909
115c9b81
GR		 910static noinline size_t if_nlmsg_size(const struct net_device *dev,
911 u32 ext_filter_mask)
339bf98f
TG		 912{
913 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
914 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
0b815a1a 915 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
339bf98f 916 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
270cb4d0 917 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
339bf98f 918 + nla_total_size(sizeof(struct rtnl_link_stats))
35c58459 919 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
339bf98f
TG		 920 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
921 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
922 + nla_total_size(4) /* IFLA_TXQLEN */
923 + nla_total_size(4) /* IFLA_WEIGHT */
924 + nla_total_size(4) /* IFLA_MTU */
925 + nla_total_size(4) /* IFLA_LINK */
926 + nla_total_size(4) /* IFLA_MASTER */
9a57247f 927 + nla_total_size(1) /* IFLA_CARRIER */
edbc0bb3 928 + nla_total_size(4) /* IFLA_PROMISCUITY */
76ff5cc9
JP		 929 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
930 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
6919756c
TK		 931 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
932 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
339bf98f 933 + nla_total_size(1) /* IFLA_OPERSTATE */
38f7b870 934 + nla_total_size(1) /* IFLA_LINKMODE */
2d3b479d 935 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
d37512a2 936 + nla_total_size(4) /* IFLA_LINK_NETNSID */
115c9b81
GR		 937 + nla_total_size(ext_filter_mask
938 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
939 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
c53864fd 940 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
f8ff182c 941 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
b1974ed0 942 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
82f28412 943 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
88d6378b 944 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
c57c7a95 945 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
d1fdd913 946 + rtnl_xdp_size(dev) /* IFLA_XDP */
88d6378b
AK		 947 + nla_total_size(1); /* IFLA_PROTO_DOWN */
948
339bf98f
TG		 949}
950
57b61080
SF		 951static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
952{
953 struct nlattr *vf_ports;
954 struct nlattr *vf_port;
955 int vf;
956 int err;
957
958 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS);
959 if (!vf_ports)
960 return -EMSGSIZE;
961
962 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
963 vf_port = nla_nest_start(skb, IFLA_VF_PORT);
8ca94183
SF		 964 if (!vf_port)
965 goto nla_put_failure;
a6574349
DM		 966 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
967 goto nla_put_failure;
57b61080 968 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
8ca94183
SF		 969 if (err == -EMSGSIZE)
970 goto nla_put_failure;
57b61080 971 if (err) {
57b61080
SF		 972 nla_nest_cancel(skb, vf_port);
973 continue;
974 }
975 nla_nest_end(skb, vf_port);
976 }
977
978 nla_nest_end(skb, vf_ports);
979
980 return 0;
8ca94183
SF		 981
982nla_put_failure:
983 nla_nest_cancel(skb, vf_ports);
984 return -EMSGSIZE;
57b61080
SF		 985}
986
987static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
988{
989 struct nlattr *port_self;
990 int err;
991
992 port_self = nla_nest_start(skb, IFLA_PORT_SELF);
993 if (!port_self)
994 return -EMSGSIZE;
995
996 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
997 if (err) {
998 nla_nest_cancel(skb, port_self);
8ca94183 999 return (err == -EMSGSIZE) ? err : 0;
57b61080
SF		 1000 }
1001
1002 nla_nest_end(skb, port_self);
1003
1004 return 0;
1005}
1006
c53864fd
DG		 1007static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1008 u32 ext_filter_mask)
57b61080
SF		 1009{
1010 int err;
1011
c53864fd
DG		 1012 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1013 !(ext_filter_mask & RTEXT_FILTER_VF))
57b61080
SF		 1014 return 0;
1015
1016 err = rtnl_port_self_fill(skb, dev);
1017 if (err)
1018 return err;
1019
1020 if (dev_num_vf(dev->dev.parent)) {
1021 err = rtnl_vf_ports_fill(skb, dev);
1022 if (err)
1023 return err;
1024 }
1025
1026 return 0;
1027}
1028
66cae9ed
JP		 1029static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1030{
1031 int err;
02637fce 1032 struct netdev_phys_item_id ppid;
66cae9ed
JP		 1033
1034 err = dev_get_phys_port_id(dev, &ppid);
1035 if (err) {
1036 if (err == -EOPNOTSUPP)
1037 return 0;
1038 return err;
1039 }
1040
1041 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1042 return -EMSGSIZE;
1043
1044 return 0;
1045}
1046
db24a904
DA		 1047static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1048{
1049 char name[IFNAMSIZ];
1050 int err;
1051
1052 err = dev_get_phys_port_name(dev, name, sizeof(name));
1053 if (err) {
1054 if (err == -EOPNOTSUPP)
1055 return 0;
1056 return err;
1057 }
1058
1059 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
1060 return -EMSGSIZE;
1061
1062 return 0;
1063}
1064
82f28412
JP		 1065static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1066{
1067 int err;
f8e20a9f 1068 struct switchdev_attr attr = {
6ff64f6f 1069 .orig_dev = dev,
1f868398 1070 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
f8e20a9f
SF		 1071 .flags = SWITCHDEV_F_NO_RECURSE,
1072 };
82f28412 1073
f8e20a9f 1074 err = switchdev_port_attr_get(dev, &attr);
82f28412
JP		 1075 if (err) {
1076 if (err == -EOPNOTSUPP)
1077 return 0;
1078 return err;
1079 }
1080
42275bd8
SF		 1081 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len,
1082 attr.u.ppid.id))
82f28412
JP		 1083 return -EMSGSIZE;
1084
1085 return 0;
1086}
1087
b22b941b
HFS		 1088static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1089 struct net_device *dev)
1090{
550bce59 1091 struct rtnl_link_stats64 *sp;
b22b941b 1092 struct nlattr *attr;
18402843 1093
58414d32
ND		 1094 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1095 sizeof(struct rtnl_link_stats64), IFLA_PAD);
b22b941b
HFS		 1096 if (!attr)
1097 return -EMSGSIZE;
1098
550bce59
RP		 1099 sp = nla_data(attr);
1100 dev_get_stats(dev, sp);
b22b941b 1101
550bce59
RP		 1102 attr = nla_reserve(skb, IFLA_STATS,
1103 sizeof(struct rtnl_link_stats));
b22b941b
HFS		 1104 if (!attr)
1105 return -EMSGSIZE;
1106
550bce59 1107 copy_rtnl_link_stats(nla_data(attr), sp);
b22b941b
HFS		 1108
1109 return 0;
1110}
1111
1112static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1113 struct net_device *dev,
1114 int vfs_num,
1115 struct nlattr *vfinfo)
1116{
1117 struct ifla_vf_rss_query_en vf_rss_query_en;
79aab093 1118 struct nlattr *vf, *vfstats, *vfvlanlist;
b22b941b 1119 struct ifla_vf_link_state vf_linkstate;
79aab093 1120 struct ifla_vf_vlan_info vf_vlan_info;
b22b941b
HFS		 1121 struct ifla_vf_spoofchk vf_spoofchk;
1122 struct ifla_vf_tx_rate vf_tx_rate;
1123 struct ifla_vf_stats vf_stats;
1124 struct ifla_vf_trust vf_trust;
1125 struct ifla_vf_vlan vf_vlan;
1126 struct ifla_vf_rate vf_rate;
b22b941b
HFS		 1127 struct ifla_vf_mac vf_mac;
1128 struct ifla_vf_info ivi;
1129
1130 /* Not all SR-IOV capable drivers support the
1131 * spoofcheck and "RSS query enable" query. Preset to
1132 * -1 so the user space tool can detect that the driver
1133 * didn't report anything.
1134 */
1135 ivi.spoofchk = -1;
1136 ivi.rss_query_en = -1;
1137 ivi.trusted = -1;
1138 memset(ivi.mac, 0, sizeof(ivi.mac));
1139 /* The default value for VF link state is "auto"
1140 * IFLA_VF_LINK_STATE_AUTO which equals zero
1141 */
1142 ivi.linkstate = 0;
79aab093
MS		 1143 /* VLAN Protocol by default is 802.1Q */
1144 ivi.vlan_proto = htons(ETH_P_8021Q);
b22b941b
HFS		 1145 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1146 return 0;
1147
775f4f05
DC		 1148 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1149
b22b941b
HFS		 1150 vf_mac.vf =
1151 vf_vlan.vf =
79aab093 1152 vf_vlan_info.vf =
b22b941b
HFS		 1153 vf_rate.vf =
1154 vf_tx_rate.vf =
1155 vf_spoofchk.vf =
1156 vf_linkstate.vf =
1157 vf_rss_query_en.vf =
1158 vf_trust.vf = ivi.vf;
1159
1160 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1161 vf_vlan.vlan = ivi.vlan;
1162 vf_vlan.qos = ivi.qos;
79aab093
MS		 1163 vf_vlan_info.vlan = ivi.vlan;
1164 vf_vlan_info.qos = ivi.qos;
1165 vf_vlan_info.vlan_proto = ivi.vlan_proto;
b22b941b
HFS		 1166 vf_tx_rate.rate = ivi.max_tx_rate;
1167 vf_rate.min_tx_rate = ivi.min_tx_rate;
1168 vf_rate.max_tx_rate = ivi.max_tx_rate;
1169 vf_spoofchk.setting = ivi.spoofchk;
1170 vf_linkstate.link_state = ivi.linkstate;
1171 vf_rss_query_en.setting = ivi.rss_query_en;
1172 vf_trust.setting = ivi.trusted;
1173 vf = nla_nest_start(skb, IFLA_VF_INFO);
79aab093
MS		 1174 if (!vf)
1175 goto nla_put_vfinfo_failure;
b22b941b
HFS		 1176 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1177 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1178 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1179 &vf_rate) ||
1180 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1181 &vf_tx_rate) ||
1182 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1183 &vf_spoofchk) ||
1184 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1185 &vf_linkstate) ||
1186 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1187 sizeof(vf_rss_query_en),
1188 &vf_rss_query_en) ||
1189 nla_put(skb, IFLA_VF_TRUST,
1190 sizeof(vf_trust), &vf_trust))
79aab093
MS		 1191 goto nla_put_vf_failure;
1192 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST);
1193 if (!vfvlanlist)
1194 goto nla_put_vf_failure;
1195 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1196 &vf_vlan_info)) {
1197 nla_nest_cancel(skb, vfvlanlist);
1198 goto nla_put_vf_failure;
1199 }
1200 nla_nest_end(skb, vfvlanlist);
b22b941b
HFS		 1201 memset(&vf_stats, 0, sizeof(vf_stats));
1202 if (dev->netdev_ops->ndo_get_vf_stats)
1203 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1204 &vf_stats);
1205 vfstats = nla_nest_start(skb, IFLA_VF_STATS);
79aab093
MS		 1206 if (!vfstats)
1207 goto nla_put_vf_failure;
343a6d8e
ND		 1208 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1209 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1210 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1211 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1212 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1213 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1214 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1215 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1216 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1217 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1218 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
79aab093
MS		 1219 vf_stats.multicast, IFLA_VF_STATS_PAD)) {
1220 nla_nest_cancel(skb, vfstats);
1221 goto nla_put_vf_failure;
1222 }
b22b941b
HFS		 1223 nla_nest_end(skb, vfstats);
1224 nla_nest_end(skb, vf);
1225 return 0;
79aab093
MS		 1226
1227nla_put_vf_failure:
1228 nla_nest_cancel(skb, vf);
1229nla_put_vfinfo_failure:
1230 nla_nest_cancel(skb, vfinfo);
1231 return -EMSGSIZE;
b22b941b
HFS		 1232}
1233
1234static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1235{
5f8e4474
KL		 1236 struct rtnl_link_ifmap map;
1237
1238 memset(&map, 0, sizeof(map));
1239 map.mem_start = dev->mem_start;
1240 map.mem_end = dev->mem_end;
1241 map.base_addr = dev->base_addr;
1242 map.irq = dev->irq;
1243 map.dma = dev->dma;
1244 map.port = dev->if_port;
1245
270cb4d0 1246 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
b22b941b
HFS		 1247 return -EMSGSIZE;
1248
1249 return 0;
1250}
1251
d1fdd913
BB		 1252static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1253{
1254 struct netdev_xdp xdp_op = {};
1255 struct nlattr *xdp;
1256 int err;
1257
1258 if (!dev->netdev_ops->ndo_xdp)
1259 return 0;
1260 xdp = nla_nest_start(skb, IFLA_XDP);
1261 if (!xdp)
1262 return -EMSGSIZE;
1263 xdp_op.command = XDP_QUERY_PROG;
1264 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
1265 if (err)
1266 goto err_cancel;
1267 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
1268 if (err)
1269 goto err_cancel;
1270
1271 nla_nest_end(skb, xdp);
1272 return 0;
1273
1274err_cancel:
1275 nla_nest_cancel(skb, xdp);
1276 return err;
1277}
1278
b60c5115 1279static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
575c3e2a 1280 int type, u32 pid, u32 seq, u32 change,
bf74b20d 1281 unsigned int flags, u32 ext_filter_mask)
b60c5115
TG		 1282{
1283 struct ifinfomsg *ifm;
1284 struct nlmsghdr *nlh;
b22b941b 1285 struct nlattr *af_spec;
f8ff182c 1286 struct rtnl_af_ops *af_ops;
898e5061 1287 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
1da177e4 1288
2907c35f 1289 ASSERT_RTNL();
b60c5115
TG		 1290 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1291 if (nlh == NULL)
26932566 1292 return -EMSGSIZE;
1da177e4 1293
b60c5115
TG		 1294 ifm = nlmsg_data(nlh);
1295 ifm->ifi_family = AF_UNSPEC;
1296 ifm->__ifi_pad = 0;
1297 ifm->ifi_type = dev->type;
1298 ifm->ifi_index = dev->ifindex;
1299 ifm->ifi_flags = dev_get_flags(dev);
1300 ifm->ifi_change = change;
1301
a6574349
DM		 1302 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1303 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1304 nla_put_u8(skb, IFLA_OPERSTATE,
1305 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1306 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1307 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1308 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
edbc0bb3 1309 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
76ff5cc9 1310 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
c70ce028
ED		 1311 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1312 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1d69c2b3 1313#ifdef CONFIG_RPS
76ff5cc9 1314 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1d69c2b3 1315#endif
a54acb3a
ND		 1316 (dev->ifindex != dev_get_iflink(dev) &&
1317 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) ||
898e5061
JP		 1318 (upper_dev &&
1319 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) ||
9a57247f 1320 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
a6574349
DM		 1321 (dev->qdisc &&
1322 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1323 (dev->ifalias &&
2d3b479d 1324 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) ||
1325 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
88d6378b
AK		 1326 atomic_read(&dev->carrier_changes)) ||
1327 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
a6574349 1328 goto nla_put_failure;
0b815a1a 1329
b22b941b
HFS		 1330 if (rtnl_fill_link_ifmap(skb, dev))
1331 goto nla_put_failure;
1da177e4
LT		 1332
1333 if (dev->addr_len) {
a6574349
DM		 1334 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1335 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1336 goto nla_put_failure;
1da177e4
LT		 1337 }
1338
66cae9ed
JP		 1339 if (rtnl_phys_port_id_fill(skb, dev))
1340 goto nla_put_failure;
1341
db24a904
DA		 1342 if (rtnl_phys_port_name_fill(skb, dev))
1343 goto nla_put_failure;
1344
82f28412
JP		 1345 if (rtnl_phys_switch_id_fill(skb, dev))
1346 goto nla_put_failure;
1347
b22b941b 1348 if (rtnl_fill_stats(skb, dev))
10708f37 1349 goto nla_put_failure;
10708f37 1350
a6574349
DM		 1351 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) &&
1352 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)))
1353 goto nla_put_failure;
57b61080 1354
b22b941b
HFS		 1355 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent &&
1356 ext_filter_mask & RTEXT_FILTER_VF) {
ebc08a6f 1357 int i;
b22b941b 1358 struct nlattr *vfinfo;
c02db8c6
CW		 1359 int num_vfs = dev_num_vf(dev->dev.parent);
1360
c02db8c6
CW		 1361 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST);
1362 if (!vfinfo)
1363 goto nla_put_failure;
1364 for (i = 0; i < num_vfs; i++) {
b22b941b 1365 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
3b766cd8 1366 goto nla_put_failure;
ebc08a6f 1367 }
b22b941b 1368
c02db8c6 1369 nla_nest_end(skb, vfinfo);
ebc08a6f 1370 }
57b61080 1371
c53864fd 1372 if (rtnl_port_fill(skb, dev, ext_filter_mask))
57b61080
SF		 1373 goto nla_put_failure;
1374
d1fdd913
BB		 1375 if (rtnl_xdp_fill(skb, dev))
1376 goto nla_put_failure;
1377
ba7d49b1 1378 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
38f7b870
PM		 1379 if (rtnl_link_fill(skb, dev) < 0)
1380 goto nla_put_failure;
1381 }
1382
d37512a2
ND		 1383 if (dev->rtnl_link_ops &&
1384 dev->rtnl_link_ops->get_link_net) {
1385 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1386
1387 if (!net_eq(dev_net(dev), link_net)) {
7a0877d4 1388 int id = peernet2id_alloc(dev_net(dev), link_net);
d37512a2
ND		 1389
1390 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1391 goto nla_put_failure;
1392 }
1393 }
1394
f8ff182c
TG		 1395 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC)))
1396 goto nla_put_failure;
1397
1398 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
1399 if (af_ops->fill_link_af) {
1400 struct nlattr *af;
1401 int err;
1402
1403 if (!(af = nla_nest_start(skb, af_ops->family)))
1404 goto nla_put_failure;
1405
d5566fd7 1406 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
f8ff182c
TG		 1407
1408 /*
1409 * Caller may return ENODATA to indicate that there
1410 * was no data to be dumped. This is not an error, it
1411 * means we should trim the attribute header and
1412 * continue.
1413 */
1414 if (err == -ENODATA)
1415 nla_nest_cancel(skb, af);
1416 else if (err < 0)
1417 goto nla_put_failure;
1418
1419 nla_nest_end(skb, af);
1420 }
1421 }
1422
1423 nla_nest_end(skb, af_spec);
1424
053c095a
JB		 1425 nlmsg_end(skb, nlh);
1426 return 0;
b60c5115
TG		 1427
1428nla_put_failure:
26932566
PM		 1429 nlmsg_cancel(skb, nlh);
1430 return -EMSGSIZE;
1da177e4
LT		 1431}
1432
f7b12606 1433static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
5176f91e 1434 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
38f7b870
PM		 1435 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1436 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
5176f91e 1437 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
da5e0494 1438 [IFLA_MTU] = { .type = NLA_U32 },
76e87306 1439 [IFLA_LINK] = { .type = NLA_U32 },
fbaec0ea 1440 [IFLA_MASTER] = { .type = NLA_U32 },
9a57247f 1441 [IFLA_CARRIER] = { .type = NLA_U8 },
da5e0494
TG		 1442 [IFLA_TXQLEN] = { .type = NLA_U32 },
1443 [IFLA_WEIGHT] = { .type = NLA_U32 },
1444 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1445 [IFLA_LINKMODE] = { .type = NLA_U8 },
76e87306 1446 [IFLA_LINKINFO] = { .type = NLA_NESTED },
d8a5ec67 1447 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
f0630529 1448 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
0b815a1a 1449 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 },
c02db8c6 1450 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
57b61080
SF		 1451 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1452 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
f8ff182c 1453 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
115c9b81 1454 [IFLA_EXT_MASK] = { .type = NLA_U32 },
edbc0bb3 1455 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
76ff5cc9
JP		 1456 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1457 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
02637fce 1458 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
2d3b479d 1459 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
82f28412 1460 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
317f4810 1461 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
88d6378b 1462 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
d1fdd913 1463 [IFLA_XDP] = { .type = NLA_NESTED },
da5e0494
TG		 1464};
1465
38f7b870
PM		 1466static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1467 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1468 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
ba7d49b1
JP		 1469 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1470 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
38f7b870
PM		 1471};
1472
c02db8c6 1473static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
364d5716
DB		 1474 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1475 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
79aab093 1476 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
364d5716
DB		 1477 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1478 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1479 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1480 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
01a3d796 1481 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
3b766cd8 1482 [IFLA_VF_STATS] = { .type = NLA_NESTED },
dd461d6a 1483 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
cc8e27cc
EC		 1484 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1485 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
3b766cd8
EBE		 1486};
1487
57b61080
SF		 1488static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1489 [IFLA_PORT_VF] = { .type = NLA_U32 },
1490 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1491 .len = PORT_PROFILE_MAX },
57b61080
SF		 1492 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1493 .len = PORT_UUID_MAX },
1494 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1495 .len = PORT_UUID_MAX },
1496 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1497 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
025331df
DB		 1498
1499 /* Unused, but we need to keep it here since user space could
1500 * fill it. It's also broken with regard to NLA_BINARY use in
1501 * combination with structs.
1502 */
1503 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1504 .len = sizeof(struct ifla_port_vsi) },
57b61080
SF		 1505};
1506
d1fdd913
BB		 1507static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1508 [IFLA_XDP_FD] = { .type = NLA_S32 },
1509 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
85de8576 1510 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
d1fdd913
BB		 1511};
1512
dc599f76
DA		 1513static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1514{
1515 const struct rtnl_link_ops *ops = NULL;
1516 struct nlattr *linfo[IFLA_INFO_MAX + 1];
1517
1518 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
1519 return NULL;
1520
1521 if (linfo[IFLA_INFO_KIND]) {
1522 char kind[MODULE_NAME_LEN];
1523
1524 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1525 ops = rtnl_link_ops_get(kind);
1526 }
1527
1528 return ops;
1529}
1530
1531static bool link_master_filtered(struct net_device *dev, int master_idx)
1532{
1533 struct net_device *master;
1534
1535 if (!master_idx)
1536 return false;
1537
1538 master = netdev_master_upper_dev_get(dev);
1539 if (!master || master->ifindex != master_idx)
1540 return true;
1541
1542 return false;
1543}
1544
1545static bool link_kind_filtered(const struct net_device *dev,
1546 const struct rtnl_link_ops *kind_ops)
1547{
1548 if (kind_ops && dev->rtnl_link_ops != kind_ops)
1549 return true;
1550
1551 return false;
1552}
1553
1554static bool link_dump_filtered(struct net_device *dev,
1555 int master_idx,
1556 const struct rtnl_link_ops *kind_ops)
1557{
1558 if (link_master_filtered(dev, master_idx) ||
1559 link_kind_filtered(dev, kind_ops))
1560 return true;
1561
1562 return false;
1563}
1564
f7b12606
JP		 1565static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
1566{
1567 struct net *net = sock_net(skb->sk);
1568 int h, s_h;
1569 int idx = 0, s_idx;
1570 struct net_device *dev;
1571 struct hlist_head *head;
1572 struct nlattr *tb[IFLA_MAX+1];
1573 u32 ext_filter_mask = 0;
dc599f76
DA		 1574 const struct rtnl_link_ops *kind_ops = NULL;
1575 unsigned int flags = NLM_F_MULTI;
1576 int master_idx = 0;
973462bb 1577 int err;
e5eca6d4 1578 int hdrlen;
f7b12606
JP		 1579
1580 s_h = cb->args[0];
1581 s_idx = cb->args[1];
1582
f7b12606
JP		 1583 cb->seq = net->dev_base_seq;
1584
e5eca6d4
MS		 1585 /* A hack to preserve kernel<->userspace interface.
1586 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
1587 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
1588 * what iproute2 < v3.9.0 used.
1589 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
1590 * attribute, its netlink message is shorter than struct ifinfomsg.
1591 */
1592 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
1593 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
1594
1595 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
f7b12606
JP		 1596
1597 if (tb[IFLA_EXT_MASK])
1598 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
dc599f76
DA		 1599
1600 if (tb[IFLA_MASTER])
1601 master_idx = nla_get_u32(tb[IFLA_MASTER]);
1602
1603 if (tb[IFLA_LINKINFO])
1604 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]);
1605
1606 if (master_idx || kind_ops)
1607 flags |= NLM_F_DUMP_FILTERED;
f7b12606
JP		 1608 }
1609
1610 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
1611 idx = 0;
1612 head = &net->dev_index_head[h];
cac5e65e 1613 hlist_for_each_entry(dev, head, index_hlist) {
dc599f76 1614 if (link_dump_filtered(dev, master_idx, kind_ops))
3f0ae05d 1615 goto cont;
f7b12606
JP		 1616 if (idx < s_idx)
1617 goto cont;
973462bb
DG		 1618 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK,
1619 NETLINK_CB(cb->skb).portid,
1620 cb->nlh->nlmsg_seq, 0,
dc599f76 1621 flags,
bf74b20d 1622 ext_filter_mask);
973462bb
DG		 1623 /* If we ran out of room on the first message,
1624 * we're in trouble
1625 */
1626 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
1627
7b46a644 1628 if (err < 0)
f7b12606
JP		 1629 goto out;
1630
1631 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
1632cont:
1633 idx++;
1634 }
1635 }
1636out:
f7b12606
JP		 1637 cb->args[1] = idx;
1638 cb->args[0] = h;
1639
1640 return skb->len;
1641}
1642
1643int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
1644{
1645 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
1646}
1647EXPORT_SYMBOL(rtnl_nla_parse_ifla);
1648
81adee47
EB		 1649struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
1650{
1651 struct net *net;
1652 /* Examine the link attributes and figure out which
1653 * network namespace we are talking about.
1654 */
1655 if (tb[IFLA_NET_NS_PID])
1656 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
f0630529
EB		 1657 else if (tb[IFLA_NET_NS_FD])
1658 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
81adee47
EB		 1659 else
1660 net = get_net(src_net);
1661 return net;
1662}
1663EXPORT_SYMBOL(rtnl_link_get_net);
1664
1840bb13
TG		 1665static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
1666{
1667 if (dev) {
1668 if (tb[IFLA_ADDRESS] &&
1669 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
1670 return -EINVAL;
1671
1672 if (tb[IFLA_BROADCAST] &&
1673 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
1674 return -EINVAL;
1675 }
1676
cf7afbfe
TG		 1677 if (tb[IFLA_AF_SPEC]) {
1678 struct nlattr *af;
1679 int rem, err;
1680
1681 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
1682 const struct rtnl_af_ops *af_ops;
1683
1684 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
1685 return -EAFNOSUPPORT;
1686
1687 if (!af_ops->set_link_af)
1688 return -EOPNOTSUPP;
1689
1690 if (af_ops->validate_link_af) {
6d3a9a68 1691 err = af_ops->validate_link_af(dev, af);
cf7afbfe
TG		 1692 if (err < 0)
1693 return err;
1694 }
1695 }
1696 }
1697
1840bb13
TG		 1698 return 0;
1699}
1700
cc8e27cc
EC		 1701static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
1702 int guid_type)
1703{
1704 const struct net_device_ops *ops = dev->netdev_ops;
1705
1706 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
1707}
1708
1709static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
1710{
1711 if (dev->type != ARPHRD_INFINIBAND)
1712 return -EOPNOTSUPP;
1713
1714 return handle_infiniband_guid(dev, ivt, guid_type);
1715}
1716
4f7d2cdf 1717static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
c02db8c6 1718{
c02db8c6 1719 const struct net_device_ops *ops = dev->netdev_ops;
4f7d2cdf 1720 int err = -EINVAL;
c02db8c6 1721
4f7d2cdf
DB		 1722 if (tb[IFLA_VF_MAC]) {
1723 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
01a3d796 1724
4f7d2cdf
DB		 1725 err = -EOPNOTSUPP;
1726 if (ops->ndo_set_vf_mac)
1727 err = ops->ndo_set_vf_mac(dev, ivm->vf,
1728 ivm->mac);
1729 if (err < 0)
1730 return err;
1731 }
1732
1733 if (tb[IFLA_VF_VLAN]) {
1734 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
1735
1736 err = -EOPNOTSUPP;
1737 if (ops->ndo_set_vf_vlan)
1738 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
79aab093
MS		 1739 ivv->qos,
1740 htons(ETH_P_8021Q));
1741 if (err < 0)
1742 return err;
1743 }
1744
1745 if (tb[IFLA_VF_VLAN_LIST]) {
1746 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
1747 struct nlattr *attr;
1748 int rem, len = 0;
1749
1750 err = -EOPNOTSUPP;
1751 if (!ops->ndo_set_vf_vlan)
1752 return err;
1753
1754 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
1755 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
1756 nla_len(attr) < NLA_HDRLEN) {
1757 return -EINVAL;
1758 }
1759 if (len >= MAX_VLAN_LIST_LEN)
1760 return -EOPNOTSUPP;
1761 ivvl[len] = nla_data(attr);
1762
1763 len++;
1764 }
fa34cd94
AB		 1765 if (len == 0)
1766 return -EINVAL;
1767
79aab093
MS		 1768 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
1769 ivvl[0]->qos, ivvl[0]->vlan_proto);
4f7d2cdf
DB		 1770 if (err < 0)
1771 return err;
c02db8c6 1772 }
4f7d2cdf
DB		 1773
1774 if (tb[IFLA_VF_TX_RATE]) {
1775 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
1776 struct ifla_vf_info ivf;
1777
1778 err = -EOPNOTSUPP;
1779 if (ops->ndo_get_vf_config)
1780 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
1781 if (err < 0)
1782 return err;
1783
1784 err = -EOPNOTSUPP;
1785 if (ops->ndo_set_vf_rate)
1786 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1787 ivf.min_tx_rate,
1788 ivt->rate);
1789 if (err < 0)
1790 return err;
1791 }
1792
1793 if (tb[IFLA_VF_RATE]) {
1794 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
1795
1796 err = -EOPNOTSUPP;
1797 if (ops->ndo_set_vf_rate)
1798 err = ops->ndo_set_vf_rate(dev, ivt->vf,
1799 ivt->min_tx_rate,
1800 ivt->max_tx_rate);
1801 if (err < 0)
1802 return err;
1803 }
1804
1805 if (tb[IFLA_VF_SPOOFCHK]) {
1806 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
1807
1808 err = -EOPNOTSUPP;
1809 if (ops->ndo_set_vf_spoofchk)
1810 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
1811 ivs->setting);
1812 if (err < 0)
1813 return err;
1814 }
1815
1816 if (tb[IFLA_VF_LINK_STATE]) {
1817 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
1818
1819 err = -EOPNOTSUPP;
1820 if (ops->ndo_set_vf_link_state)
1821 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
1822 ivl->link_state);
1823 if (err < 0)
1824 return err;
1825 }
1826
1827 if (tb[IFLA_VF_RSS_QUERY_EN]) {
1828 struct ifla_vf_rss_query_en *ivrssq_en;
1829
1830 err = -EOPNOTSUPP;
1831 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
1832 if (ops->ndo_set_vf_rss_query_en)
1833 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
1834 ivrssq_en->setting);
1835 if (err < 0)
1836 return err;
1837 }
1838
dd461d6a
HS		 1839 if (tb[IFLA_VF_TRUST]) {
1840 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
1841
1842 err = -EOPNOTSUPP;
1843 if (ops->ndo_set_vf_trust)
1844 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
1845 if (err < 0)
1846 return err;
1847 }
1848
cc8e27cc
EC		 1849 if (tb[IFLA_VF_IB_NODE_GUID]) {
1850 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
1851
1852 if (!ops->ndo_set_vf_guid)
1853 return -EOPNOTSUPP;
1854
1855 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
1856 }
1857
1858 if (tb[IFLA_VF_IB_PORT_GUID]) {
1859 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
1860
1861 if (!ops->ndo_set_vf_guid)
1862 return -EOPNOTSUPP;
1863
1864 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
1865 }
1866
c02db8c6
CW		 1867 return err;
1868}
1869
fbaec0ea
JP		 1870static int do_set_master(struct net_device *dev, int ifindex)
1871{
898e5061 1872 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
fbaec0ea
JP		 1873 const struct net_device_ops *ops;
1874 int err;
1875
898e5061
JP		 1876 if (upper_dev) {
1877 if (upper_dev->ifindex == ifindex)
fbaec0ea 1878 return 0;
898e5061 1879 ops = upper_dev->netdev_ops;
fbaec0ea 1880 if (ops->ndo_del_slave) {
898e5061 1881 err = ops->ndo_del_slave(upper_dev, dev);
fbaec0ea
JP		 1882 if (err)
1883 return err;
1884 } else {
1885 return -EOPNOTSUPP;
1886 }
1887 }
1888
1889 if (ifindex) {
898e5061
JP		 1890 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
1891 if (!upper_dev)
fbaec0ea 1892 return -EINVAL;
898e5061 1893 ops = upper_dev->netdev_ops;
fbaec0ea 1894 if (ops->ndo_add_slave) {
898e5061 1895 err = ops->ndo_add_slave(upper_dev, dev);
fbaec0ea
JP		 1896 if (err)
1897 return err;
1898 } else {
1899 return -EOPNOTSUPP;
1900 }
1901 }
1902 return 0;
1903}
1904
90c325e3 1905#define DO_SETLINK_MODIFIED 0x01
ba998906
ND		 1906/* notify flag means notify + modified. */
1907#define DO_SETLINK_NOTIFY 0x03
90f62cf3
EB		 1908static int do_setlink(const struct sk_buff *skb,
1909 struct net_device *dev, struct ifinfomsg *ifm,
90c325e3 1910 struct nlattr **tb, char *ifname, int status)
1da177e4 1911{
d314774c 1912 const struct net_device_ops *ops = dev->netdev_ops;
0157f60c 1913 int err;
1da177e4 1914
f0630529 1915 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) {
81adee47 1916 struct net *net = rtnl_link_get_net(dev_net(dev), tb);
d8a5ec67
EB		 1917 if (IS_ERR(net)) {
1918 err = PTR_ERR(net);
1919 goto errout;
1920 }
90f62cf3 1921 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
e0ebde0e 1922 put_net(net);
b51642f6
EB		 1923 err = -EPERM;
1924 goto errout;
1925 }
d8a5ec67
EB		 1926 err = dev_change_net_namespace(dev, net, ifname);
1927 put_net(net);
1928 if (err)
1929 goto errout;
90c325e3 1930 status |= DO_SETLINK_MODIFIED;
d8a5ec67
EB		 1931 }
1932
da5e0494 1933 if (tb[IFLA_MAP]) {
1da177e4
LT		 1934 struct rtnl_link_ifmap *u_map;
1935 struct ifmap k_map;
1936
d314774c 1937 if (!ops->ndo_set_config) {
1da177e4 1938 err = -EOPNOTSUPP;
0157f60c 1939 goto errout;
1da177e4
LT		 1940 }
1941
1942 if (!netif_device_present(dev)) {
1943 err = -ENODEV;
0157f60c 1944 goto errout;
1da177e4 1945 }
1da177e4 1946
da5e0494 1947 u_map = nla_data(tb[IFLA_MAP]);
1da177e4
LT		 1948 k_map.mem_start = (unsigned long) u_map->mem_start;
1949 k_map.mem_end = (unsigned long) u_map->mem_end;
1950 k_map.base_addr = (unsigned short) u_map->base_addr;
1951 k_map.irq = (unsigned char) u_map->irq;
1952 k_map.dma = (unsigned char) u_map->dma;
1953 k_map.port = (unsigned char) u_map->port;
1954
d314774c 1955 err = ops->ndo_set_config(dev, &k_map);
da5e0494 1956 if (err < 0)
0157f60c 1957 goto errout;
1da177e4 1958
ba998906 1959 status |= DO_SETLINK_NOTIFY;
1da177e4
LT		 1960 }
1961
da5e0494 1962 if (tb[IFLA_ADDRESS]) {
70f8e78e
DM		 1963 struct sockaddr *sa;
1964 int len;
1965
70f8e78e
DM		 1966 len = sizeof(sa_family_t) + dev->addr_len;
1967 sa = kmalloc(len, GFP_KERNEL);
1968 if (!sa) {
1969 err = -ENOMEM;
0157f60c 1970 goto errout;
70f8e78e
DM		 1971 }
1972 sa->sa_family = dev->type;
da5e0494 1973 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
70f8e78e 1974 dev->addr_len);
e7c3273e 1975 err = dev_set_mac_address(dev, sa);
70f8e78e 1976 kfree(sa);
1da177e4 1977 if (err)
0157f60c 1978 goto errout;
90c325e3 1979 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1980 }
1981
da5e0494
TG		 1982 if (tb[IFLA_MTU]) {
1983 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
1984 if (err < 0)
0157f60c 1985 goto errout;
90c325e3 1986 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 1987 }
1988
cbda10fa
VD		 1989 if (tb[IFLA_GROUP]) {
1990 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
ba998906 1991 status |= DO_SETLINK_NOTIFY;
cbda10fa
VD		 1992 }
1993
da5e0494
TG		 1994 /*
1995 * Interface selected by interface index but interface
1996 * name provided implies that a name change has been
1997 * requested.
1998 */
51055be8 1999 if (ifm->ifi_index > 0 && ifname[0]) {
da5e0494
TG		 2000 err = dev_change_name(dev, ifname);
2001 if (err < 0)
0157f60c 2002 goto errout;
90c325e3 2003 status |= DO_SETLINK_MODIFIED;
1da177e4
LT		 2004 }
2005
0b815a1a
SH		 2006 if (tb[IFLA_IFALIAS]) {
2007 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2008 nla_len(tb[IFLA_IFALIAS]));
2009 if (err < 0)
2010 goto errout;
ba998906 2011 status |= DO_SETLINK_NOTIFY;
0b815a1a
SH		 2012 }
2013
da5e0494
TG		 2014 if (tb[IFLA_BROADCAST]) {
2015 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
e7c3273e 2016 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
1da177e4
LT		 2017 }
2018
83b496e9 2019 if (ifm->ifi_flags || ifm->ifi_change) {
3729d502 2020 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
5f9021cf
JB		 2021 if (err < 0)
2022 goto errout;
83b496e9 2023 }
1da177e4 2024
fbaec0ea
JP		 2025 if (tb[IFLA_MASTER]) {
2026 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2027 if (err)
2028 goto errout;
90c325e3 2029 status |= DO_SETLINK_MODIFIED;
fbaec0ea
JP		 2030 }
2031
9a57247f
JP		 2032 if (tb[IFLA_CARRIER]) {
2033 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2034 if (err)
2035 goto errout;
90c325e3 2036 status |= DO_SETLINK_MODIFIED;
9a57247f
JP		 2037 }
2038
5d1180fc
ND		 2039 if (tb[IFLA_TXQLEN]) {
2040 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
08294a26
JW		 2041 unsigned long orig_len = dev->tx_queue_len;
2042
2043 if (dev->tx_queue_len ^ value) {
2044 dev->tx_queue_len = value;
2045 err = call_netdevice_notifiers(
2046 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
2047 err = notifier_to_errno(err);
2048 if (err) {
2049 dev->tx_queue_len = orig_len;
2050 goto errout;
2051 }
ba998906 2052 status |= DO_SETLINK_NOTIFY;
08294a26 2053 }
5d1180fc 2054 }
b00055aa 2055
da5e0494 2056 if (tb[IFLA_OPERSTATE])
93b2d4a2 2057 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
b00055aa 2058
da5e0494 2059 if (tb[IFLA_LINKMODE]) {
1889b0e7
ND		 2060 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2061
93b2d4a2 2062 write_lock_bh(&dev_base_lock);
1889b0e7 2063 if (dev->link_mode ^ value)
ba998906 2064 status |= DO_SETLINK_NOTIFY;
1889b0e7 2065 dev->link_mode = value;
93b2d4a2 2066 write_unlock_bh(&dev_base_lock);
b00055aa
SR		 2067 }
2068
c02db8c6 2069 if (tb[IFLA_VFINFO_LIST]) {
4f7d2cdf 2070 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
c02db8c6
CW		 2071 struct nlattr *attr;
2072 int rem;
4f7d2cdf 2073
c02db8c6 2074 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
4f7d2cdf
DB		 2075 if (nla_type(attr) != IFLA_VF_INFO ||
2076 nla_len(attr) < NLA_HDRLEN) {
253683bb 2077 err = -EINVAL;
c02db8c6 2078 goto errout;
253683bb 2079 }
4f7d2cdf
DB		 2080 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
2081 ifla_vf_policy);
2082 if (err < 0)
2083 goto errout;
2084 err = do_setvfinfo(dev, vfinfo);
c02db8c6
CW		 2085 if (err < 0)
2086 goto errout;
ba998906 2087 status |= DO_SETLINK_NOTIFY;
c02db8c6 2088 }
ebc08a6f 2089 }
1da177e4
LT		 2090 err = 0;
2091
57b61080
SF		 2092 if (tb[IFLA_VF_PORTS]) {
2093 struct nlattr *port[IFLA_PORT_MAX+1];
2094 struct nlattr *attr;
2095 int vf;
2096 int rem;
2097
2098 err = -EOPNOTSUPP;
2099 if (!ops->ndo_set_vf_port)
2100 goto errout;
2101
2102 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
035d210f
DB		 2103 if (nla_type(attr) != IFLA_VF_PORT ||
2104 nla_len(attr) < NLA_HDRLEN) {
2105 err = -EINVAL;
2106 goto errout;
2107 }
2108 err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
2109 ifla_port_policy);
57b61080
SF		 2110 if (err < 0)
2111 goto errout;
2112 if (!port[IFLA_PORT_VF]) {
2113 err = -EOPNOTSUPP;
2114 goto errout;
2115 }
2116 vf = nla_get_u32(port[IFLA_PORT_VF]);
2117 err = ops->ndo_set_vf_port(dev, vf, port);
2118 if (err < 0)
2119 goto errout;
ba998906 2120 status |= DO_SETLINK_NOTIFY;
57b61080
SF		 2121 }
2122 }
2123 err = 0;
2124
2125 if (tb[IFLA_PORT_SELF]) {
2126 struct nlattr *port[IFLA_PORT_MAX+1];
2127
2128 err = nla_parse_nested(port, IFLA_PORT_MAX,
2129 tb[IFLA_PORT_SELF], ifla_port_policy);
2130 if (err < 0)
2131 goto errout;
2132
2133 err = -EOPNOTSUPP;
2134 if (ops->ndo_set_vf_port)
2135 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2136 if (err < 0)
2137 goto errout;
ba998906 2138 status |= DO_SETLINK_NOTIFY;
57b61080 2139 }
f8ff182c
TG		 2140
2141 if (tb[IFLA_AF_SPEC]) {
2142 struct nlattr *af;
2143 int rem;
2144
2145 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2146 const struct rtnl_af_ops *af_ops;
2147
2148 if (!(af_ops = rtnl_af_lookup(nla_type(af))))
cf7afbfe 2149 BUG();
f8ff182c 2150
cf7afbfe 2151 err = af_ops->set_link_af(dev, af);
f8ff182c
TG		 2152 if (err < 0)
2153 goto errout;
2154
ba998906 2155 status |= DO_SETLINK_NOTIFY;
f8ff182c
TG		 2156 }
2157 }
57b61080
SF		 2158 err = 0;
2159
88d6378b
AK		 2160 if (tb[IFLA_PROTO_DOWN]) {
2161 err = dev_change_proto_down(dev,
2162 nla_get_u8(tb[IFLA_PROTO_DOWN]));
2163 if (err)
2164 goto errout;
2165 status |= DO_SETLINK_NOTIFY;
2166 }
2167
d1fdd913
BB		 2168 if (tb[IFLA_XDP]) {
2169 struct nlattr *xdp[IFLA_XDP_MAX + 1];
85de8576 2170 u32 xdp_flags = 0;
d1fdd913
BB		 2171
2172 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
2173 ifla_xdp_policy);
2174 if (err < 0)
2175 goto errout;
2176
262d8625
BB		 2177 if (xdp[IFLA_XDP_ATTACHED]) {
2178 err = -EINVAL;
2179 goto errout;
2180 }
85de8576
DB		 2181
2182 if (xdp[IFLA_XDP_FLAGS]) {
2183 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2184 if (xdp_flags & ~XDP_FLAGS_MASK) {
2185 err = -EINVAL;
2186 goto errout;
2187 }
2188 }
2189
d1fdd913
BB		 2190 if (xdp[IFLA_XDP_FD]) {
2191 err = dev_change_xdp_fd(dev,
85de8576
DB		 2192 nla_get_s32(xdp[IFLA_XDP_FD]),
2193 xdp_flags);
d1fdd913
BB		 2194 if (err)
2195 goto errout;
2196 status |= DO_SETLINK_NOTIFY;
2197 }
2198 }
2199
0157f60c 2200errout:
ba998906
ND		 2201 if (status & DO_SETLINK_MODIFIED) {
2202 if (status & DO_SETLINK_NOTIFY)
2203 netdev_state_change(dev);
2204
2205 if (err < 0)
2206 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",
2207 dev->name);
2208 }
da5e0494 2209
0157f60c
PM		 2210 return err;
2211}
1da177e4 2212
661d2967 2213static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
0157f60c 2214{
3b1e0a65 2215 struct net *net = sock_net(skb->sk);
0157f60c
PM		 2216 struct ifinfomsg *ifm;
2217 struct net_device *dev;
2218 int err;
2219 struct nlattr *tb[IFLA_MAX+1];
2220 char ifname[IFNAMSIZ];
2221
2222 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2223 if (err < 0)
2224 goto errout;
2225
2226 if (tb[IFLA_IFNAME])
2227 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2228 else
2229 ifname[0] = '\0';
2230
2231 err = -EINVAL;
2232 ifm = nlmsg_data(nlh);
2233 if (ifm->ifi_index > 0)
a3d12891 2234 dev = __dev_get_by_index(net, ifm->ifi_index);
0157f60c 2235 else if (tb[IFLA_IFNAME])
a3d12891 2236 dev = __dev_get_by_name(net, ifname);
0157f60c
PM		 2237 else
2238 goto errout;
2239
2240 if (dev == NULL) {
2241 err = -ENODEV;
2242 goto errout;
2243 }
2244
e0d087af
ED		 2245 err = validate_linkmsg(dev, tb);
2246 if (err < 0)
a3d12891 2247 goto errout;
0157f60c 2248
90f62cf3 2249 err = do_setlink(skb, dev, ifm, tb, ifname, 0);
da5e0494 2250errout:
1da177e4
LT		 2251 return err;
2252}
2253
66400d54
WC		 2254static int rtnl_group_dellink(const struct net *net, int group)
2255{
2256 struct net_device *dev, *aux;
2257 LIST_HEAD(list_kill);
2258 bool found = false;
2259
2260 if (!group)
2261 return -EPERM;
2262
2263 for_each_netdev(net, dev) {
2264 if (dev->group == group) {
2265 const struct rtnl_link_ops *ops;
2266
2267 found = true;
2268 ops = dev->rtnl_link_ops;
2269 if (!ops || !ops->dellink)
2270 return -EOPNOTSUPP;
2271 }
2272 }
2273
2274 if (!found)
2275 return -ENODEV;
2276
2277 for_each_netdev_safe(net, dev, aux) {
2278 if (dev->group == group) {
2279 const struct rtnl_link_ops *ops;
2280
2281 ops = dev->rtnl_link_ops;
2282 ops->dellink(dev, &list_kill);
2283 }
2284 }
2285 unregister_netdevice_many(&list_kill);
2286
2287 return 0;
2288}
2289
614732ea
TG		 2290int rtnl_delete_link(struct net_device *dev)
2291{
2292 const struct rtnl_link_ops *ops;
2293 LIST_HEAD(list_kill);
2294
2295 ops = dev->rtnl_link_ops;
2296 if (!ops || !ops->dellink)
2297 return -EOPNOTSUPP;
2298
2299 ops->dellink(dev, &list_kill);
2300 unregister_netdevice_many(&list_kill);
2301
2302 return 0;
2303}
2304EXPORT_SYMBOL_GPL(rtnl_delete_link);
2305
661d2967 2306static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2307{
3b1e0a65 2308 struct net *net = sock_net(skb->sk);
38f7b870
PM		 2309 struct net_device *dev;
2310 struct ifinfomsg *ifm;
2311 char ifname[IFNAMSIZ];
2312 struct nlattr *tb[IFLA_MAX+1];
2313 int err;
2314
2315 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2316 if (err < 0)
2317 return err;
2318
2319 if (tb[IFLA_IFNAME])
2320 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2321
2322 ifm = nlmsg_data(nlh);
2323 if (ifm->ifi_index > 0)
881d966b 2324 dev = __dev_get_by_index(net, ifm->ifi_index);
38f7b870 2325 else if (tb[IFLA_IFNAME])
881d966b 2326 dev = __dev_get_by_name(net, ifname);
66400d54
WC		 2327 else if (tb[IFLA_GROUP])
2328 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP]));
38f7b870
PM		 2329 else
2330 return -EINVAL;
2331
2332 if (!dev)
2333 return -ENODEV;
2334
614732ea 2335 return rtnl_delete_link(dev);
38f7b870
PM		 2336}
2337
3729d502
PM		 2338int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
2339{
2340 unsigned int old_flags;
2341 int err;
2342
2343 old_flags = dev->flags;
2344 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
2345 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm));
2346 if (err < 0)
2347 return err;
2348 }
2349
2350 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3729d502 2351
a528c219 2352 __dev_notify_flags(dev, old_flags, ~0U);
3729d502
PM		 2353 return 0;
2354}
2355EXPORT_SYMBOL(rtnl_configure_link);
2356
c0713563 2357struct net_device *rtnl_create_link(struct net *net,
78ebb0d0 2358 const char *ifname, unsigned char name_assign_type,
5517750f 2359 const struct rtnl_link_ops *ops, struct nlattr *tb[])
e7199288 2360{
e7199288 2361 struct net_device *dev;
d40156aa
JP		 2362 unsigned int num_tx_queues = 1;
2363 unsigned int num_rx_queues = 1;
e7199288 2364
76ff5cc9
JP		 2365 if (tb[IFLA_NUM_TX_QUEUES])
2366 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
2367 else if (ops->get_num_tx_queues)
d40156aa 2368 num_tx_queues = ops->get_num_tx_queues();
76ff5cc9
JP		 2369
2370 if (tb[IFLA_NUM_RX_QUEUES])
2371 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
2372 else if (ops->get_num_rx_queues)
d40156aa 2373 num_rx_queues = ops->get_num_rx_queues();
efacb309 2374
5517750f 2375 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
c835a677 2376 ops->setup, num_tx_queues, num_rx_queues);
e7199288 2377 if (!dev)
d1892e4e 2378 return ERR_PTR(-ENOMEM);
e7199288 2379
81adee47
EB		 2380 dev_net_set(dev, net);
2381 dev->rtnl_link_ops = ops;
3729d502 2382 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
81adee47 2383
e7199288
PE		 2384 if (tb[IFLA_MTU])
2385 dev->mtu = nla_get_u32(tb[IFLA_MTU]);
2afb9b53 2386 if (tb[IFLA_ADDRESS]) {
e7199288
PE		 2387 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
2388 nla_len(tb[IFLA_ADDRESS]));
2afb9b53
JP		 2389 dev->addr_assign_type = NET_ADDR_SET;
2390 }
e7199288
PE		 2391 if (tb[IFLA_BROADCAST])
2392 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
2393 nla_len(tb[IFLA_BROADCAST]));
2394 if (tb[IFLA_TXQLEN])
2395 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
2396 if (tb[IFLA_OPERSTATE])
93b2d4a2 2397 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
e7199288
PE		 2398 if (tb[IFLA_LINKMODE])
2399 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
ffa934f1
PM		 2400 if (tb[IFLA_GROUP])
2401 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
e7199288
PE		 2402
2403 return dev;
e7199288 2404}
e0d087af 2405EXPORT_SYMBOL(rtnl_create_link);
e7199288 2406
90f62cf3
EB		 2407static int rtnl_group_changelink(const struct sk_buff *skb,
2408 struct net *net, int group,
e7ed828f
VD		 2409 struct ifinfomsg *ifm,
2410 struct nlattr **tb)
2411{
d079535d 2412 struct net_device *dev, *aux;
e7ed828f
VD		 2413 int err;
2414
d079535d 2415 for_each_netdev_safe(net, dev, aux) {
e7ed828f 2416 if (dev->group == group) {
90f62cf3 2417 err = do_setlink(skb, dev, ifm, tb, NULL, 0);
e7ed828f
VD		 2418 if (err < 0)
2419 return err;
2420 }
2421 }
2422
2423 return 0;
2424}
2425
661d2967 2426static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
38f7b870 2427{
3b1e0a65 2428 struct net *net = sock_net(skb->sk);
38f7b870 2429 const struct rtnl_link_ops *ops;
ba7d49b1 2430 const struct rtnl_link_ops *m_ops = NULL;
38f7b870 2431 struct net_device *dev;
ba7d49b1 2432 struct net_device *master_dev = NULL;
38f7b870
PM		 2433 struct ifinfomsg *ifm;
2434 char kind[MODULE_NAME_LEN];
2435 char ifname[IFNAMSIZ];
2436 struct nlattr *tb[IFLA_MAX+1];
2437 struct nlattr *linkinfo[IFLA_INFO_MAX+1];
5517750f 2438 unsigned char name_assign_type = NET_NAME_USER;
38f7b870
PM		 2439 int err;
2440
95a5afca 2441#ifdef CONFIG_MODULES
38f7b870 2442replay:
8072f085 2443#endif
38f7b870
PM		 2444 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2445 if (err < 0)
2446 return err;
2447
2448 if (tb[IFLA_IFNAME])
2449 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2450 else
2451 ifname[0] = '\0';
2452
2453 ifm = nlmsg_data(nlh);
2454 if (ifm->ifi_index > 0)
881d966b 2455 dev = __dev_get_by_index(net, ifm->ifi_index);
e7ed828f
VD		 2456 else {
2457 if (ifname[0])
2458 dev = __dev_get_by_name(net, ifname);
e7ed828f
VD		 2459 else
2460 dev = NULL;
2461 }
38f7b870 2462
ba7d49b1
JP		 2463 if (dev) {
2464 master_dev = netdev_master_upper_dev_get(dev);
2465 if (master_dev)
2466 m_ops = master_dev->rtnl_link_ops;
2467 }
2468
e0d087af
ED		 2469 err = validate_linkmsg(dev, tb);
2470 if (err < 0)
1840bb13
TG		 2471 return err;
2472
38f7b870
PM		 2473 if (tb[IFLA_LINKINFO]) {
2474 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
2475 tb[IFLA_LINKINFO], ifla_info_policy);
2476 if (err < 0)
2477 return err;
2478 } else
2479 memset(linkinfo, 0, sizeof(linkinfo));
2480
2481 if (linkinfo[IFLA_INFO_KIND]) {
2482 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
2483 ops = rtnl_link_ops_get(kind);
2484 } else {
2485 kind[0] = '\0';
2486 ops = NULL;
2487 }
2488
2489 if (1) {
4e10fd5b
SL		 2490 struct nlattr *attr[ops ? ops->maxtype + 1 : 1];
2491 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1];
ba7d49b1
JP		 2492 struct nlattr **data = NULL;
2493 struct nlattr **slave_data = NULL;
317f4810 2494 struct net *dest_net, *link_net = NULL;
38f7b870
PM		 2495
2496 if (ops) {
2497 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
2498 err = nla_parse_nested(attr, ops->maxtype,
2499 linkinfo[IFLA_INFO_DATA],
2500 ops->policy);
2501 if (err < 0)
2502 return err;
2503 data = attr;
2504 }
2505 if (ops->validate) {
2506 err = ops->validate(tb, data);
2507 if (err < 0)
2508 return err;
2509 }
2510 }
2511
ba7d49b1
JP		 2512 if (m_ops) {
2513 if (m_ops->slave_maxtype &&
2514 linkinfo[IFLA_INFO_SLAVE_DATA]) {
2515 err = nla_parse_nested(slave_attr,
2516 m_ops->slave_maxtype,
2517 linkinfo[IFLA_INFO_SLAVE_DATA],
2518 m_ops->slave_policy);
2519 if (err < 0)
2520 return err;
2521 slave_data = slave_attr;
2522 }
2523 if (m_ops->slave_validate) {
2524 err = m_ops->slave_validate(tb, slave_data);
2525 if (err < 0)
2526 return err;
2527 }
2528 }
2529
38f7b870 2530 if (dev) {
90c325e3 2531 int status = 0;
38f7b870
PM		 2532
2533 if (nlh->nlmsg_flags & NLM_F_EXCL)
2534 return -EEXIST;
2535 if (nlh->nlmsg_flags & NLM_F_REPLACE)
2536 return -EOPNOTSUPP;
2537
2538 if (linkinfo[IFLA_INFO_DATA]) {
2539 if (!ops || ops != dev->rtnl_link_ops ||
2540 !ops->changelink)
2541 return -EOPNOTSUPP;
2542
2543 err = ops->changelink(dev, tb, data);
2544 if (err < 0)
2545 return err;
ba998906 2546 status |= DO_SETLINK_NOTIFY;
38f7b870
PM		 2547 }
2548
ba7d49b1
JP		 2549 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
2550 if (!m_ops || !m_ops->slave_changelink)
2551 return -EOPNOTSUPP;
2552
2553 err = m_ops->slave_changelink(master_dev, dev,
2554 tb, slave_data);
2555 if (err < 0)
2556 return err;
ba998906 2557 status |= DO_SETLINK_NOTIFY;
ba7d49b1
JP		 2558 }
2559
90c325e3 2560 return do_setlink(skb, dev, ifm, tb, ifname, status);
38f7b870
PM		 2561 }
2562
ffa934f1
PM		 2563 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
2564 if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
90f62cf3 2565 return rtnl_group_changelink(skb, net,
ffa934f1
PM		 2566 nla_get_u32(tb[IFLA_GROUP]),
2567 ifm, tb);
38f7b870 2568 return -ENODEV;
ffa934f1 2569 }
38f7b870 2570
160ca014 2571 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
38f7b870
PM		 2572 return -EOPNOTSUPP;
2573
2574 if (!ops) {
95a5afca 2575#ifdef CONFIG_MODULES
38f7b870
PM		 2576 if (kind[0]) {
2577 __rtnl_unlock();
2578 request_module("rtnl-link-%s", kind);
2579 rtnl_lock();
2580 ops = rtnl_link_ops_get(kind);
2581 if (ops)
2582 goto replay;
2583 }
2584#endif
2585 return -EOPNOTSUPP;
2586 }
2587
b0ab2fab
JP		 2588 if (!ops->setup)
2589 return -EOPNOTSUPP;
2590
5517750f 2591 if (!ifname[0]) {
38f7b870 2592 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
5517750f
TG		 2593 name_assign_type = NET_NAME_ENUM;
2594 }
e7199288 2595
81adee47 2596 dest_net = rtnl_link_get_net(net, tb);
13ad1774
EB		 2597 if (IS_ERR(dest_net))
2598 return PTR_ERR(dest_net);
2599
505ce415
EB		 2600 err = -EPERM;
2601 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN))
2602 goto out;
2603
317f4810
ND		 2604 if (tb[IFLA_LINK_NETNSID]) {
2605 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
2606
2607 link_net = get_net_ns_by_id(dest_net, id);
2608 if (!link_net) {
2609 err = -EINVAL;
2610 goto out;
2611 }
06615bed
EB		 2612 err = -EPERM;
2613 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
2614 goto out;
317f4810
ND		 2615 }
2616
2617 dev = rtnl_create_link(link_net ? : dest_net, ifname,
2618 name_assign_type, ops, tb);
9c7dafbf 2619 if (IS_ERR(dev)) {
e7199288 2620 err = PTR_ERR(dev);
9c7dafbf
PE		 2621 goto out;
2622 }
2623
2624 dev->ifindex = ifm->ifi_index;
2625
0e0eee24 2626 if (ops->newlink) {
7b4ce694 2627 err = ops->newlink(link_net ? : net, dev, tb, data);
0e0eee24 2628 /* Drivers should call free_netdev() in ->destructor
e51fb152
CW		 2629 * and unregister it on failure after registration
2630 * so that device could be finally freed in rtnl_unlock.
0e0eee24 2631 */
e51fb152
CW		 2632 if (err < 0) {
2633 /* If device is not registered at all, free it now */
2634 if (dev->reg_state == NETREG_UNINITIALIZED)
2635 free_netdev(dev);
0e0eee24 2636 goto out;
e51fb152 2637 }
0e0eee24 2638 } else {
2d85cba2 2639 err = register_netdevice(dev);
0e0eee24
CW		 2640 if (err < 0) {
2641 free_netdev(dev);
2642 goto out;
2643 }
fce9b9be 2644 }
3729d502 2645 err = rtnl_configure_link(dev, ifm);
43638900
DM		 2646 if (err < 0)
2647 goto out_unregister;
bdef279b 2648 if (link_net) {
317f4810 2649 err = dev_change_net_namespace(dev, dest_net, ifname);
bdef279b 2650 if (err < 0)
43638900 2651 goto out_unregister;
bdef279b 2652 }
160ca014
TV		 2653 if (tb[IFLA_MASTER]) {
2654 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
2655 if (err)
2656 goto out_unregister;
2657 }
3729d502 2658out:
317f4810
ND		 2659 if (link_net)
2660 put_net(link_net);
81adee47 2661 put_net(dest_net);
38f7b870 2662 return err;
43638900
DM		 2663out_unregister:
2664 if (ops->newlink) {
2665 LIST_HEAD(list_kill);
2666
2667 ops->dellink(dev, &list_kill);
2668 unregister_netdevice_many(&list_kill);
2669 } else {
2670 unregister_netdevice(dev);
2671 }
2672 goto out;
38f7b870
PM		 2673 }
2674}
2675
661d2967 2676static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
711e2c33 2677{
3b1e0a65 2678 struct net *net = sock_net(skb->sk);
b60c5115 2679 struct ifinfomsg *ifm;
a3d12891 2680 char ifname[IFNAMSIZ];
b60c5115
TG		 2681 struct nlattr *tb[IFLA_MAX+1];
2682 struct net_device *dev = NULL;
2683 struct sk_buff *nskb;
339bf98f 2684 int err;
115c9b81 2685 u32 ext_filter_mask = 0;
711e2c33 2686
b60c5115
TG		 2687 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
2688 if (err < 0)
9918f230 2689 return err;
b60c5115 2690
a3d12891
ED		 2691 if (tb[IFLA_IFNAME])
2692 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2693
115c9b81
GR		 2694 if (tb[IFLA_EXT_MASK])
2695 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2696
b60c5115 2697 ifm = nlmsg_data(nlh);
a3d12891
ED		 2698 if (ifm->ifi_index > 0)
2699 dev = __dev_get_by_index(net, ifm->ifi_index);
2700 else if (tb[IFLA_IFNAME])
2701 dev = __dev_get_by_name(net, ifname);
2702 else
711e2c33 2703 return -EINVAL;
711e2c33 2704
a3d12891
ED		 2705 if (dev == NULL)
2706 return -ENODEV;
2707
115c9b81 2708 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
a3d12891
ED		 2709 if (nskb == NULL)
2710 return -ENOBUFS;
b60c5115 2711
15e47304 2712 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
bf74b20d 2713 nlh->nlmsg_seq, 0, 0, ext_filter_mask);
26932566
PM		 2714 if (err < 0) {
2715 /* -EMSGSIZE implies BUG in if_nlmsg_size */
2716 WARN_ON(err == -EMSGSIZE);
2717 kfree_skb(nskb);
a3d12891 2718 } else
15e47304 2719 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
711e2c33 2720
b60c5115 2721 return err;
711e2c33 2722}
711e2c33 2723
115c9b81 2724static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
c7ac8679 2725{
115c9b81
GR		 2726 struct net *net = sock_net(skb->sk);
2727 struct net_device *dev;
2728 struct nlattr *tb[IFLA_MAX+1];
2729 u32 ext_filter_mask = 0;
2730 u16 min_ifinfo_dump_size = 0;
e5eca6d4
MS		 2731 int hdrlen;
2732
2733 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
2734 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2735 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
115c9b81 2736
e5eca6d4 2737 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
a4b64fbe
ED		 2738 if (tb[IFLA_EXT_MASK])
2739 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
2740 }
115c9b81
GR		 2741
2742 if (!ext_filter_mask)
2743 return NLMSG_GOODSIZE;
2744 /*
2745 * traverse the list of net devices and compute the minimum
2746 * buffer size based upon the filter mask.
2747 */
2748 list_for_each_entry(dev, &net->dev_base_head, dev_list) {
2749 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size,
2750 if_nlmsg_size(dev,
2751 ext_filter_mask));
2752 }
2753
93af2056 2754 return nlmsg_total_size(min_ifinfo_dump_size);
c7ac8679
GR		 2755}
2756
42bad1da 2757static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
1da177e4
LT		 2758{
2759 int idx;
2760 int s_idx = cb->family;
2761
2762 if (s_idx == 0)
2763 s_idx = 1;
25239cee 2764 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
1da177e4
LT		 2765 int type = cb->nlh->nlmsg_type-RTM_BASE;
2766 if (idx < s_idx || idx == PF_PACKET)
2767 continue;
e2849863
TG		 2768 if (rtnl_msg_handlers[idx] == NULL ||
2769 rtnl_msg_handlers[idx][type].dumpit == NULL)
1da177e4 2770 continue;
0465277f 2771 if (idx > s_idx) {
1da177e4 2772 memset(&cb->args[0], 0, sizeof(cb->args));
0465277f
ND		 2773 cb->prev_seq = 0;
2774 cb->seq = 0;
2775 }
e2849863 2776 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
1da177e4
LT		 2777 break;
2778 }
2779 cb->family = idx;
2780
2781 return skb->len;
2782}
2783
395eea6c 2784struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
bf74b20d 2785 unsigned int change, gfp_t flags)
1da177e4 2786{
c346dca1 2787 struct net *net = dev_net(dev);
1da177e4 2788 struct sk_buff *skb;
0ec6d3f4 2789 int err = -ENOBUFS;
c7ac8679 2790 size_t if_info_size;
1da177e4 2791
7f294054 2792 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
0ec6d3f4
TG		 2793 if (skb == NULL)
2794 goto errout;
1da177e4 2795
bf74b20d 2796 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
26932566
PM		 2797 if (err < 0) {
2798 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
2799 WARN_ON(err == -EMSGSIZE);
2800 kfree_skb(skb);
2801 goto errout;
2802 }
395eea6c 2803 return skb;
0ec6d3f4
TG		 2804errout:
2805 if (err < 0)
4b3da706 2806 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
395eea6c
MB		 2807 return NULL;
2808}
2809
2810void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
2811{
2812 struct net *net = dev_net(dev);
2813
2814 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
2815}
2816
bf74b20d
DM		 2817void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
2818 gfp_t flags)
395eea6c
MB		 2819{
2820 struct sk_buff *skb;
2821
ed2a80ab
ND		 2822 if (dev->reg_state != NETREG_REGISTERED)
2823 return;
2824
bf74b20d 2825 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
395eea6c
MB		 2826 if (skb)
2827 rtmsg_ifinfo_send(skb, dev, flags);
1da177e4 2828}
471cb5a3 2829EXPORT_SYMBOL(rtmsg_ifinfo);
1da177e4 2830
d83b0603
JF		 2831static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
2832 struct net_device *dev,
1e53d5bb 2833 u8 *addr, u16 vid, u32 pid, u32 seq,
1c104a6b 2834 int type, unsigned int flags,
b3379041 2835 int nlflags, u16 ndm_state)
d83b0603
JF		 2836{
2837 struct nlmsghdr *nlh;
2838 struct ndmsg *ndm;
2839
1c104a6b 2840 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
d83b0603
JF		 2841 if (!nlh)
2842 return -EMSGSIZE;
2843
2844 ndm = nlmsg_data(nlh);
2845 ndm->ndm_family = AF_BRIDGE;
2846 ndm->ndm_pad1 = 0;
2847 ndm->ndm_pad2 = 0;
2848 ndm->ndm_flags = flags;
2849 ndm->ndm_type = 0;
2850 ndm->ndm_ifindex = dev->ifindex;
b3379041 2851 ndm->ndm_state = ndm_state;
d83b0603
JF		 2852
2853 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
2854 goto nla_put_failure;
1e53d5bb
HS		 2855 if (vid)
2856 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
2857 goto nla_put_failure;
d83b0603 2858
053c095a
JB		 2859 nlmsg_end(skb, nlh);
2860 return 0;
d83b0603
JF		 2861
2862nla_put_failure:
2863 nlmsg_cancel(skb, nlh);
2864 return -EMSGSIZE;
2865}
2866
3ff661c3
JF		 2867static inline size_t rtnl_fdb_nlmsg_size(void)
2868{
f82ef3e1
SD		 2869 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
2870 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
2871 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
2872 0;
3ff661c3
JF		 2873}
2874
b3379041
HS		 2875static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
2876 u16 ndm_state)
3ff661c3
JF		 2877{
2878 struct net *net = dev_net(dev);
2879 struct sk_buff *skb;
2880 int err = -ENOBUFS;
2881
2882 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
2883 if (!skb)
2884 goto errout;
2885
1e53d5bb 2886 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
b3379041 2887 0, 0, type, NTF_SELF, 0, ndm_state);
3ff661c3
JF		 2888 if (err < 0) {
2889 kfree_skb(skb);
2890 goto errout;
2891 }
2892
2893 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
2894 return;
2895errout:
2896 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
2897}
2898
090096bf
VY		 2899/**
2900 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
2901 */
2902int ndo_dflt_fdb_add(struct ndmsg *ndm,
2903 struct nlattr *tb[],
2904 struct net_device *dev,
f6f6424b 2905 const unsigned char *addr, u16 vid,
090096bf
VY		 2906 u16 flags)
2907{
2908 int err = -EINVAL;
2909
2910 /* If aging addresses are supported device will need to
2911 * implement its own handler for this.
2912 */
2913 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
2914 pr_info("%s: FDB only supports static addresses\n", dev->name);
2915 return err;
2916 }
2917
65891fea
OG		 2918 if (vid) {
2919 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
2920 return err;
2921 }
2922
090096bf
VY		 2923 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
2924 err = dev_uc_add_excl(dev, addr);
2925 else if (is_multicast_ether_addr(addr))
2926 err = dev_mc_add_excl(dev, addr);
2927
2928 /* Only return duplicate errors if NLM_F_EXCL is set */
2929 if (err == -EEXIST && !(flags & NLM_F_EXCL))
2930 err = 0;
2931
2932 return err;
2933}
2934EXPORT_SYMBOL(ndo_dflt_fdb_add);
2935
f6f6424b
JP		 2936static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
2937{
2938 u16 vid = 0;
2939
2940 if (vlan_attr) {
2941 if (nla_len(vlan_attr) != sizeof(u16)) {
2942 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n");
2943 return -EINVAL;
2944 }
2945
2946 vid = nla_get_u16(vlan_attr);
2947
2948 if (!vid || vid >= VLAN_VID_MASK) {
2949 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n",
2950 vid);
2951 return -EINVAL;
2952 }
2953 }
2954 *p_vid = vid;
2955 return 0;
2956}
2957
661d2967 2958static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 2959{
2960 struct net *net = sock_net(skb->sk);
77162022
JF		 2961 struct ndmsg *ndm;
2962 struct nlattr *tb[NDA_MAX+1];
2963 struct net_device *dev;
2964 u8 *addr;
f6f6424b 2965 u16 vid;
77162022
JF		 2966 int err;
2967
2968 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
2969 if (err < 0)
2970 return err;
2971
2972 ndm = nlmsg_data(nlh);
2973 if (ndm->ndm_ifindex == 0) {
2974 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n");
2975 return -EINVAL;
2976 }
2977
2978 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
2979 if (dev == NULL) {
2980 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n");
2981 return -ENODEV;
2982 }
2983
2984 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
2985 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n");
2986 return -EINVAL;
2987 }
2988
2989 addr = nla_data(tb[NDA_LLADDR]);
77162022 2990
f6f6424b
JP		 2991 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
2992 if (err)
2993 return err;
2994
77162022
JF		 2995 err = -EOPNOTSUPP;
2996
2997 /* Support fdb on master device the net/bridge default case */
2998 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
2999 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3000 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3001 const struct net_device_ops *ops = br_dev->netdev_ops;
3002
f6f6424b
JP		 3003 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
3004 nlh->nlmsg_flags);
77162022
JF		 3005 if (err)
3006 goto out;
3007 else
3008 ndm->ndm_flags &= ~NTF_MASTER;
3009 }
3010
3011 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3012 if ((ndm->ndm_flags & NTF_SELF)) {
3013 if (dev->netdev_ops->ndo_fdb_add)
3014 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
f6f6424b 3015 vid,
090096bf
VY		 3016 nlh->nlmsg_flags);
3017 else
f6f6424b 3018 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
090096bf 3019 nlh->nlmsg_flags);
77162022 3020
3ff661c3 3021 if (!err) {
b3379041
HS		 3022 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
3023 ndm->ndm_state);
77162022 3024 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3025 }
77162022
JF		 3026 }
3027out:
3028 return err;
3029}
3030
090096bf
VY		 3031/**
3032 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
3033 */
3034int ndo_dflt_fdb_del(struct ndmsg *ndm,
3035 struct nlattr *tb[],
3036 struct net_device *dev,
f6f6424b 3037 const unsigned char *addr, u16 vid)
090096bf 3038{
c8a89c4a 3039 int err = -EINVAL;
090096bf
VY		 3040
3041 /* If aging addresses are supported device will need to
3042 * implement its own handler for this.
3043 */
64535993 3044 if (!(ndm->ndm_state & NUD_PERMANENT)) {
090096bf 3045 pr_info("%s: FDB only supports static addresses\n", dev->name);
c8a89c4a 3046 return err;
090096bf
VY		 3047 }
3048
3049 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3050 err = dev_uc_del(dev, addr);
3051 else if (is_multicast_ether_addr(addr))
3052 err = dev_mc_del(dev, addr);
090096bf
VY		 3053
3054 return err;
3055}
3056EXPORT_SYMBOL(ndo_dflt_fdb_del);
3057
661d2967 3058static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
77162022
JF		 3059{
3060 struct net *net = sock_net(skb->sk);
3061 struct ndmsg *ndm;
1690be63 3062 struct nlattr *tb[NDA_MAX+1];
77162022
JF		 3063 struct net_device *dev;
3064 int err = -EINVAL;
3065 __u8 *addr;
f6f6424b 3066 u16 vid;
77162022 3067
90f62cf3 3068 if (!netlink_capable(skb, CAP_NET_ADMIN))
1690be63
VY		 3069 return -EPERM;
3070
3071 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
3072 if (err < 0)
3073 return err;
77162022
JF		 3074
3075 ndm = nlmsg_data(nlh);
3076 if (ndm->ndm_ifindex == 0) {
3077 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n");
3078 return -EINVAL;
3079 }
3080
3081 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
3082 if (dev == NULL) {
3083 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n");
3084 return -ENODEV;
3085 }
3086
1690be63
VY		 3087 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
3088 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n");
3089 return -EINVAL;
3090 }
3091
3092 addr = nla_data(tb[NDA_LLADDR]);
77162022 3093
f6f6424b
JP		 3094 err = fdb_vid_parse(tb[NDA_VLAN], &vid);
3095 if (err)
3096 return err;
3097
77162022
JF		 3098 err = -EOPNOTSUPP;
3099
3100 /* Support fdb on master device the net/bridge default case */
3101 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
3102 (dev->priv_flags & IFF_BRIDGE_PORT)) {
898e5061
JP		 3103 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3104 const struct net_device_ops *ops = br_dev->netdev_ops;
77162022 3105
898e5061 3106 if (ops->ndo_fdb_del)
f6f6424b 3107 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
77162022
JF		 3108
3109 if (err)
3110 goto out;
3111 else
3112 ndm->ndm_flags &= ~NTF_MASTER;
3113 }
3114
3115 /* Embedded bridge, macvlan, and any other device support */
090096bf
VY		 3116 if (ndm->ndm_flags & NTF_SELF) {
3117 if (dev->netdev_ops->ndo_fdb_del)
f6f6424b
JP		 3118 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
3119 vid);
090096bf 3120 else
f6f6424b 3121 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
77162022 3122
3ff661c3 3123 if (!err) {
b3379041
HS		 3124 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
3125 ndm->ndm_state);
77162022 3126 ndm->ndm_flags &= ~NTF_SELF;
3ff661c3 3127 }
77162022
JF		 3128 }
3129out:
3130 return err;
3131}
3132
d83b0603
JF		 3133static int nlmsg_populate_fdb(struct sk_buff *skb,
3134 struct netlink_callback *cb,
3135 struct net_device *dev,
3136 int *idx,
3137 struct netdev_hw_addr_list *list)
3138{
3139 struct netdev_hw_addr *ha;
3140 int err;
15e47304 3141 u32 portid, seq;
d83b0603 3142
15e47304 3143 portid = NETLINK_CB(cb->skb).portid;
d83b0603
JF		 3144 seq = cb->nlh->nlmsg_seq;
3145
3146 list_for_each_entry(ha, &list->list, list) {
d297653d 3147 if (*idx < cb->args[2])
d83b0603
JF		 3148 goto skip;
3149
1e53d5bb 3150 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
a7a558fe 3151 portid, seq,
1c104a6b 3152 RTM_NEWNEIGH, NTF_SELF,
b3379041 3153 NLM_F_MULTI, NUD_PERMANENT);
d83b0603
JF		 3154 if (err < 0)
3155 return err;
3156skip:
3157 *idx += 1;
3158 }
3159 return 0;
3160}
3161
3162/**
2c53040f 3163 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
d83b0603
JF		 3164 * @nlh: netlink message header
3165 * @dev: netdevice
3166 *
3167 * Default netdevice operation to dump the existing unicast address list.
91f3e7b1 3168 * Returns number of addresses from list put in skb.
d83b0603
JF		 3169 */
3170int ndo_dflt_fdb_dump(struct sk_buff *skb,
3171 struct netlink_callback *cb,
3172 struct net_device *dev,
5d5eacb3 3173 struct net_device *filter_dev,
d297653d 3174 int *idx)
d83b0603
JF		 3175{
3176 int err;
3177
3178 netif_addr_lock_bh(dev);
d297653d 3179 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
d83b0603
JF		 3180 if (err)
3181 goto out;
2934c9db 3182 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
d83b0603
JF		 3183out:
3184 netif_addr_unlock_bh(dev);
d297653d 3185 return err;
d83b0603
JF		 3186}
3187EXPORT_SYMBOL(ndo_dflt_fdb_dump);
3188
77162022
JF		 3189static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
3190{
77162022 3191 struct net_device *dev;
5e6d2435 3192 struct nlattr *tb[IFLA_MAX+1];
5e6d2435
JHS		 3193 struct net_device *br_dev = NULL;
3194 const struct net_device_ops *ops = NULL;
3195 const struct net_device_ops *cops = NULL;
3196 struct ifinfomsg *ifm = nlmsg_data(cb->nlh);
3197 struct net *net = sock_net(skb->sk);
d297653d 3198 struct hlist_head *head;
5e6d2435
JHS		 3199 int brport_idx = 0;
3200 int br_idx = 0;
d297653d
RP		 3201 int h, s_h;
3202 int idx = 0, s_idx;
3203 int err = 0;
3204 int fidx = 0;
5e6d2435
JHS		 3205
3206 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
3207 ifla_policy) == 0) {
3208 if (tb[IFLA_MASTER])
3209 br_idx = nla_get_u32(tb[IFLA_MASTER]);
3210 }
3211
3212 brport_idx = ifm->ifi_index;
3213
3214 if (br_idx) {
3215 br_dev = __dev_get_by_index(net, br_idx);
3216 if (!br_dev)
3217 return -ENODEV;
3218
3219 ops = br_dev->netdev_ops;
5e6d2435
JHS		 3220 }
3221
d297653d
RP		 3222 s_h = cb->args[0];
3223 s_idx = cb->args[1];
5e6d2435 3224
d297653d
RP		 3225 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3226 idx = 0;
3227 head = &net->dev_index_head[h];
3228 hlist_for_each_entry(dev, head, index_hlist) {
5e6d2435 3229
d297653d 3230 if (brport_idx && (dev->ifindex != brport_idx))
5e6d2435
JHS		 3231 continue;
3232
d297653d
RP		 3233 if (!br_idx) { /* user did not specify a specific bridge */
3234 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3235 br_dev = netdev_master_upper_dev_get(dev);
3236 cops = br_dev->netdev_ops;
3237 }
3238 } else {
3239 if (dev != br_dev &&
3240 !(dev->priv_flags & IFF_BRIDGE_PORT))
3241 continue;
5e6d2435 3242
d297653d
RP		 3243 if (br_dev != netdev_master_upper_dev_get(dev) &&
3244 !(dev->priv_flags & IFF_EBRIDGE))
3245 continue;
3246 cops = ops;
3247 }
77162022 3248
d297653d
RP		 3249 if (idx < s_idx)
3250 goto cont;
77162022 3251
d297653d
RP		 3252 if (dev->priv_flags & IFF_BRIDGE_PORT) {
3253 if (cops && cops->ndo_fdb_dump) {
3254 err = cops->ndo_fdb_dump(skb, cb,
3255 br_dev, dev,
3256 &fidx);
3257 if (err == -EMSGSIZE)
3258 goto out;
3259 }
3260 }
5e6d2435 3261
d297653d
RP		 3262 if (dev->netdev_ops->ndo_fdb_dump)
3263 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
3264 dev, NULL,
3265 &fidx);
3266 else
3267 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
3268 &fidx);
3269 if (err == -EMSGSIZE)
3270 goto out;
3271
3272 cops = NULL;
3273
3274 /* reset fdb offset to 0 for rest of the interfaces */
3275 cb->args[2] = 0;
3276 fidx = 0;
3277cont:
3278 idx++;
3279 }
77162022 3280 }
77162022 3281
d297653d
RP		 3282out:
3283 cb->args[0] = h;
3284 cb->args[1] = idx;
3285 cb->args[2] = fidx;
3286
77162022
JF		 3287 return skb->len;
3288}
3289
2c3c031c
SF		 3290static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
3291 unsigned int attrnum, unsigned int flag)
3292{
3293 if (mask & flag)
3294 return nla_put_u8(skb, attrnum, !!(flags & flag));
3295 return 0;
3296}
3297
815cccbf 3298int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
2c3c031c 3299 struct net_device *dev, u16 mode,
7d4f8d87
SF		 3300 u32 flags, u32 mask, int nlflags,
3301 u32 filter_mask,
3302 int (*vlan_fill)(struct sk_buff *skb,
3303 struct net_device *dev,
3304 u32 filter_mask))
815cccbf
JF		 3305{
3306 struct nlmsghdr *nlh;
3307 struct ifinfomsg *ifm;
3308 struct nlattr *br_afspec;
2c3c031c 3309 struct nlattr *protinfo;
815cccbf 3310 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
898e5061 3311 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
7d4f8d87 3312 int err = 0;
815cccbf 3313
46c264da 3314 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
815cccbf
JF		 3315 if (nlh == NULL)
3316 return -EMSGSIZE;
3317
3318 ifm = nlmsg_data(nlh);
3319 ifm->ifi_family = AF_BRIDGE;
3320 ifm->__ifi_pad = 0;
3321 ifm->ifi_type = dev->type;
3322 ifm->ifi_index = dev->ifindex;
3323 ifm->ifi_flags = dev_get_flags(dev);
3324 ifm->ifi_change = 0;
3325
3326
3327 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
3328 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
3329 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
898e5061
JP		 3330 (br_dev &&
3331 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
815cccbf
JF		 3332 (dev->addr_len &&
3333 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
a54acb3a
ND		 3334 (dev->ifindex != dev_get_iflink(dev) &&
3335 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
815cccbf
JF		 3336 goto nla_put_failure;
3337
3338 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC);
3339 if (!br_afspec)
3340 goto nla_put_failure;
3341
1d460b98 3342 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
815cccbf
JF		 3343 nla_nest_cancel(skb, br_afspec);
3344 goto nla_put_failure;
3345 }
1d460b98
RP		 3346
3347 if (mode != BRIDGE_MODE_UNDEF) {
3348 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
3349 nla_nest_cancel(skb, br_afspec);
3350 goto nla_put_failure;
3351 }
3352 }
7d4f8d87
SF		 3353 if (vlan_fill) {
3354 err = vlan_fill(skb, dev, filter_mask);
3355 if (err) {
3356 nla_nest_cancel(skb, br_afspec);
3357 goto nla_put_failure;
3358 }
3359 }
815cccbf
JF		 3360 nla_nest_end(skb, br_afspec);
3361
2c3c031c
SF		 3362 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
3363 if (!protinfo)
3364 goto nla_put_failure;
3365
3366 if (brport_nla_put_flag(skb, flags, mask,
3367 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
3368 brport_nla_put_flag(skb, flags, mask,
3369 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
3370 brport_nla_put_flag(skb, flags, mask,
3371 IFLA_BRPORT_FAST_LEAVE,
3372 BR_MULTICAST_FAST_LEAVE) ||
3373 brport_nla_put_flag(skb, flags, mask,
3374 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
3375 brport_nla_put_flag(skb, flags, mask,
3376 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
3377 brport_nla_put_flag(skb, flags, mask,
3378 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
3379 brport_nla_put_flag(skb, flags, mask,
3380 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
3381 brport_nla_put_flag(skb, flags, mask,
3382 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) {
3383 nla_nest_cancel(skb, protinfo);
3384 goto nla_put_failure;
3385 }
3386
3387 nla_nest_end(skb, protinfo);
3388
053c095a
JB		 3389 nlmsg_end(skb, nlh);
3390 return 0;
815cccbf
JF		 3391nla_put_failure:
3392 nlmsg_cancel(skb, nlh);
7d4f8d87 3393 return err ? err : -EMSGSIZE;
815cccbf 3394}
7d4f8d87 3395EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
815cccbf 3396
e5a55a89
JF		 3397static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
3398{
3399 struct net *net = sock_net(skb->sk);
3400 struct net_device *dev;
3401 int idx = 0;
3402 u32 portid = NETLINK_CB(cb->skb).portid;
3403 u32 seq = cb->nlh->nlmsg_seq;
6cbdceeb 3404 u32 filter_mask = 0;
d64f69b0 3405 int err;
6cbdceeb 3406
aa68c20f
TG		 3407 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) {
3408 struct nlattr *extfilt;
3409
3410 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg),
3411 IFLA_EXT_MASK);
3412 if (extfilt) {
3413 if (nla_len(extfilt) < sizeof(filter_mask))
3414 return -EINVAL;
3415
3416 filter_mask = nla_get_u32(extfilt);
3417 }
3418 }
e5a55a89
JF		 3419
3420 rcu_read_lock();
3421 for_each_netdev_rcu(net, dev) {
3422 const struct net_device_ops *ops = dev->netdev_ops;
898e5061 3423 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
e5a55a89 3424
898e5061 3425 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
d64f69b0
RP		 3426 if (idx >= cb->args[0]) {
3427 err = br_dev->netdev_ops->ndo_bridge_getlink(
3428 skb, portid, seq, dev,
3429 filter_mask, NLM_F_MULTI);
3430 if (err < 0 && err != -EOPNOTSUPP)
3431 break;
3432 }
25b1e679 3433 idx++;
e5a55a89
JF		 3434 }
3435
3436 if (ops->ndo_bridge_getlink) {
d64f69b0
RP		 3437 if (idx >= cb->args[0]) {
3438 err = ops->ndo_bridge_getlink(skb, portid,
3439 seq, dev,
3440 filter_mask,
3441 NLM_F_MULTI);
3442 if (err < 0 && err != -EOPNOTSUPP)
3443 break;
3444 }
25b1e679 3445 idx++;
e5a55a89
JF		 3446 }
3447 }
3448 rcu_read_unlock();
3449 cb->args[0] = idx;
3450
3451 return skb->len;
3452}
3453
2469ffd7
JF		 3454static inline size_t bridge_nlmsg_size(void)
3455{
3456 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
3457 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
3458 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
3459 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
3460 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
3461 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
3462 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
3463 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
3464 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
3465 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
3466 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
3467}
3468
02dba438 3469static int rtnl_bridge_notify(struct net_device *dev)
2469ffd7
JF		 3470{
3471 struct net *net = dev_net(dev);
2469ffd7
JF		 3472 struct sk_buff *skb;
3473 int err = -EOPNOTSUPP;
3474
02dba438
RP		 3475 if (!dev->netdev_ops->ndo_bridge_getlink)
3476 return 0;
3477
2469ffd7
JF		 3478 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
3479 if (!skb) {
3480 err = -ENOMEM;
3481 goto errout;
3482 }
3483
46c264da 3484 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
02dba438
RP		 3485 if (err < 0)
3486 goto errout;
2469ffd7 3487
59ccaaaa
RP		 3488 if (!skb->len)
3489 goto errout;
3490
2469ffd7
JF		 3491 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
3492 return 0;
3493errout:
3494 WARN_ON(err == -EMSGSIZE);
3495 kfree_skb(skb);
59ccaaaa
RP		 3496 if (err)
3497 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
2469ffd7
JF		 3498 return err;
3499}
3500
661d2967 3501static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
e5a55a89
JF		 3502{
3503 struct net *net = sock_net(skb->sk);
3504 struct ifinfomsg *ifm;
3505 struct net_device *dev;
2469ffd7
JF		 3506 struct nlattr *br_spec, *attr = NULL;
3507 int rem, err = -EOPNOTSUPP;
4de8b413 3508 u16 flags = 0;
c38e01b8 3509 bool have_flags = false;
e5a55a89
JF		 3510
3511 if (nlmsg_len(nlh) < sizeof(*ifm))
3512 return -EINVAL;
3513
3514 ifm = nlmsg_data(nlh);
3515 if (ifm->ifi_family != AF_BRIDGE)
3516 return -EPFNOSUPPORT;
3517
3518 dev = __dev_get_by_index(net, ifm->ifi_index);
3519 if (!dev) {
3520 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3521 return -ENODEV;
3522 }
3523
2469ffd7
JF		 3524 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3525 if (br_spec) {
3526 nla_for_each_nested(attr, br_spec, rem) {
3527 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3528 if (nla_len(attr) < sizeof(flags))
3529 return -EINVAL;
3530
c38e01b8 3531 have_flags = true;
2469ffd7
JF		 3532 flags = nla_get_u16(attr);
3533 break;
3534 }
3535 }
3536 }
3537
3538 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
898e5061
JP		 3539 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3540
3541 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
2469ffd7
JF		 3542 err = -EOPNOTSUPP;
3543 goto out;
3544 }
3545
add511b3 3546 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags);
e5a55a89
JF		 3547 if (err)
3548 goto out;
2469ffd7
JF		 3549
3550 flags &= ~BRIDGE_FLAGS_MASTER;
e5a55a89
JF		 3551 }
3552
2469ffd7
JF		 3553 if ((flags & BRIDGE_FLAGS_SELF)) {
3554 if (!dev->netdev_ops->ndo_bridge_setlink)
3555 err = -EOPNOTSUPP;
3556 else
add511b3
RP		 3557 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
3558 flags);
02dba438 3559 if (!err) {
2469ffd7 3560 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3561
3562 /* Generate event to notify upper layer of bridge
3563 * change
3564 */
3565 err = rtnl_bridge_notify(dev);
3566 }
2469ffd7 3567 }
e5a55a89 3568
c38e01b8 3569 if (have_flags)
2469ffd7 3570 memcpy(nla_data(attr), &flags, sizeof(flags));
e5a55a89
JF		 3571out:
3572 return err;
3573}
3574
661d2967 3575static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
407af329
VY		 3576{
3577 struct net *net = sock_net(skb->sk);
3578 struct ifinfomsg *ifm;
3579 struct net_device *dev;
3580 struct nlattr *br_spec, *attr = NULL;
3581 int rem, err = -EOPNOTSUPP;
4de8b413 3582 u16 flags = 0;
407af329
VY		 3583 bool have_flags = false;
3584
3585 if (nlmsg_len(nlh) < sizeof(*ifm))
3586 return -EINVAL;
3587
3588 ifm = nlmsg_data(nlh);
3589 if (ifm->ifi_family != AF_BRIDGE)
3590 return -EPFNOSUPPORT;
3591
3592 dev = __dev_get_by_index(net, ifm->ifi_index);
3593 if (!dev) {
3594 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n");
3595 return -ENODEV;
3596 }
3597
3598 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
3599 if (br_spec) {
3600 nla_for_each_nested(attr, br_spec, rem) {
3601 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
6e8d1c55
TG		 3602 if (nla_len(attr) < sizeof(flags))
3603 return -EINVAL;
3604
407af329
VY		 3605 have_flags = true;
3606 flags = nla_get_u16(attr);
3607 break;
3608 }
3609 }
3610 }
3611
407af329
VY		 3612 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
3613 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
3614
3615 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
3616 err = -EOPNOTSUPP;
3617 goto out;
3618 }
3619
add511b3 3620 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
407af329
VY		 3621 if (err)
3622 goto out;
3623
3624 flags &= ~BRIDGE_FLAGS_MASTER;
3625 }
3626
3627 if ((flags & BRIDGE_FLAGS_SELF)) {
3628 if (!dev->netdev_ops->ndo_bridge_dellink)
3629 err = -EOPNOTSUPP;
3630 else
add511b3
RP		 3631 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
3632 flags);
407af329 3633
02dba438 3634 if (!err) {
407af329 3635 flags &= ~BRIDGE_FLAGS_SELF;
02dba438
RP		 3636
3637 /* Generate event to notify upper layer of bridge
3638 * change
3639 */
3640 err = rtnl_bridge_notify(dev);
3641 }
407af329
VY		 3642 }
3643
3644 if (have_flags)
3645 memcpy(nla_data(attr), &flags, sizeof(flags));
407af329
VY		 3646out:
3647 return err;
3648}
3649
e8872a25
NA		 3650static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
3651{
3652 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
3653 (!idxattr || idxattr == attrid);
3654}
3655
69ae6ad2
NF		 3656#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
3657static int rtnl_get_offload_stats_attr_size(int attr_id)
3658{
3659 switch (attr_id) {
3660 case IFLA_OFFLOAD_XSTATS_CPU_HIT:
3661 return sizeof(struct rtnl_link_stats64);
3662 }
3663
3664 return 0;
3665}
3666
3667static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
3668 int *prividx)
3669{
3670 struct nlattr *attr = NULL;
3671 int attr_id, size;
3672 void *attr_data;
3673 int err;
3674
3675 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3676 dev->netdev_ops->ndo_get_offload_stats))
3677 return -ENODATA;
3678
3679 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3680 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3681 if (attr_id < *prividx)
3682 continue;
3683
3684 size = rtnl_get_offload_stats_attr_size(attr_id);
3685 if (!size)
3686 continue;
3687
3df5b3c6 3688 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 3689 continue;
3690
3691 attr = nla_reserve_64bit(skb, attr_id, size,
3692 IFLA_OFFLOAD_XSTATS_UNSPEC);
3693 if (!attr)
3694 goto nla_put_failure;
3695
3696 attr_data = nla_data(attr);
3697 memset(attr_data, 0, size);
3698 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
3699 attr_data);
3700 if (err)
3701 goto get_offload_stats_failure;
3702 }
3703
3704 if (!attr)
3705 return -ENODATA;
3706
3707 *prividx = 0;
3708 return 0;
3709
3710nla_put_failure:
3711 err = -EMSGSIZE;
3712get_offload_stats_failure:
3713 *prividx = attr_id;
3714 return err;
3715}
3716
3717static int rtnl_get_offload_stats_size(const struct net_device *dev)
3718{
3719 int nla_size = 0;
3720 int attr_id;
3721 int size;
3722
3723 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
3724 dev->netdev_ops->ndo_get_offload_stats))
3725 return 0;
3726
3727 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
3728 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
3df5b3c6 3729 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
69ae6ad2
NF		 3730 continue;
3731 size = rtnl_get_offload_stats_attr_size(attr_id);
3732 nla_size += nla_total_size_64bit(size);
3733 }
3734
3735 if (nla_size != 0)
3736 nla_size += nla_total_size(0);
3737
3738 return nla_size;
3739}
3740
10c9ead9
RP		 3741static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
3742 int type, u32 pid, u32 seq, u32 change,
e8872a25
NA		 3743 unsigned int flags, unsigned int filter_mask,
3744 int *idxattr, int *prividx)
10c9ead9
RP		 3745{
3746 struct if_stats_msg *ifsm;
3747 struct nlmsghdr *nlh;
3748 struct nlattr *attr;
e8872a25 3749 int s_prividx = *prividx;
69ae6ad2 3750 int err;
10c9ead9
RP		 3751
3752 ASSERT_RTNL();
3753
3754 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
3755 if (!nlh)
3756 return -EMSGSIZE;
3757
3758 ifsm = nlmsg_data(nlh);
3759 ifsm->ifindex = dev->ifindex;
3760 ifsm->filter_mask = filter_mask;
3761
e8872a25 3762 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
10c9ead9 3763 struct rtnl_link_stats64 *sp;
10c9ead9 3764
58414d32
ND		 3765 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
3766 sizeof(struct rtnl_link_stats64),
3767 IFLA_STATS_UNSPEC);
10c9ead9
RP		 3768 if (!attr)
3769 goto nla_put_failure;
3770
3771 sp = nla_data(attr);
3772 dev_get_stats(dev, sp);
3773 }
3774
97a47fac
NA		 3775 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
3776 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
3777
3778 if (ops && ops->fill_linkxstats) {
97a47fac
NA		 3779 *idxattr = IFLA_STATS_LINK_XSTATS;
3780 attr = nla_nest_start(skb,
3781 IFLA_STATS_LINK_XSTATS);
3782 if (!attr)
3783 goto nla_put_failure;
3784
80e73cc5
NA		 3785 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
3786 nla_nest_end(skb, attr);
3787 if (err)
3788 goto nla_put_failure;
3789 *idxattr = 0;
3790 }
3791 }
3792
3793 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
3794 *idxattr)) {
3795 const struct rtnl_link_ops *ops = NULL;
3796 const struct net_device *master;
3797
3798 master = netdev_master_upper_dev_get(dev);
3799 if (master)
3800 ops = master->rtnl_link_ops;
3801 if (ops && ops->fill_linkxstats) {
80e73cc5
NA		 3802 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
3803 attr = nla_nest_start(skb,
3804 IFLA_STATS_LINK_XSTATS_SLAVE);
3805 if (!attr)
3806 goto nla_put_failure;
3807
3808 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
97a47fac
NA		 3809 nla_nest_end(skb, attr);
3810 if (err)
3811 goto nla_put_failure;
3812 *idxattr = 0;
3813 }
3814 }
3815
69ae6ad2
NF		 3816 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
3817 *idxattr)) {
3818 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
3819 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS);
3820 if (!attr)
3821 goto nla_put_failure;
3822
3823 err = rtnl_get_offload_stats(skb, dev, prividx);
3824 if (err == -ENODATA)
3825 nla_nest_cancel(skb, attr);
3826 else
3827 nla_nest_end(skb, attr);
3828
3829 if (err && err != -ENODATA)
3830 goto nla_put_failure;
3831 *idxattr = 0;
3832 }
3833
aefb4d4a
RS		 3834 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
3835 struct rtnl_af_ops *af_ops;
3836
3837 *idxattr = IFLA_STATS_AF_SPEC;
3838 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
3839 if (!attr)
3840 goto nla_put_failure;
3841
3842 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3843 if (af_ops->fill_stats_af) {
3844 struct nlattr *af;
3845 int err;
3846
3847 af = nla_nest_start(skb, af_ops->family);
3848 if (!af)
3849 goto nla_put_failure;
3850
3851 err = af_ops->fill_stats_af(skb, dev);
3852
3853 if (err == -ENODATA)
3854 nla_nest_cancel(skb, af);
3855 else if (err < 0)
3856 goto nla_put_failure;
3857
3858 nla_nest_end(skb, af);
3859 }
3860 }
3861
3862 nla_nest_end(skb, attr);
3863
3864 *idxattr = 0;
3865 }
3866
10c9ead9
RP		 3867 nlmsg_end(skb, nlh);
3868
3869 return 0;
3870
3871nla_put_failure:
e8872a25
NA		 3872 /* not a multi message or no progress mean a real error */
3873 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
3874 nlmsg_cancel(skb, nlh);
3875 else
3876 nlmsg_end(skb, nlh);
10c9ead9
RP		 3877
3878 return -EMSGSIZE;
3879}
3880
10c9ead9
RP		 3881static size_t if_nlmsg_stats_size(const struct net_device *dev,
3882 u32 filter_mask)
3883{
3884 size_t size = 0;
3885
e8872a25 3886 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
10c9ead9
RP		 3887 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
3888
97a47fac
NA		 3889 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
3890 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
80e73cc5 3891 int attr = IFLA_STATS_LINK_XSTATS;
97a47fac
NA		 3892
3893 if (ops && ops->get_linkxstats_size) {
80e73cc5
NA		 3894 size += nla_total_size(ops->get_linkxstats_size(dev,
3895 attr));
97a47fac
NA		 3896 /* for IFLA_STATS_LINK_XSTATS */
3897 size += nla_total_size(0);
3898 }
3899 }
3900
80e73cc5
NA		 3901 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
3902 struct net_device *_dev = (struct net_device *)dev;
3903 const struct rtnl_link_ops *ops = NULL;
3904 const struct net_device *master;
3905
3906 /* netdev_master_upper_dev_get can't take const */
3907 master = netdev_master_upper_dev_get(_dev);
3908 if (master)
3909 ops = master->rtnl_link_ops;
3910 if (ops && ops->get_linkxstats_size) {
3911 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
3912
3913 size += nla_total_size(ops->get_linkxstats_size(dev,
3914 attr));
3915 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
3916 size += nla_total_size(0);
3917 }
3918 }
3919
69ae6ad2
NF		 3920 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
3921 size += rtnl_get_offload_stats_size(dev);
3922
aefb4d4a
RS		 3923 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
3924 struct rtnl_af_ops *af_ops;
3925
3926 /* for IFLA_STATS_AF_SPEC */
3927 size += nla_total_size(0);
3928
3929 list_for_each_entry(af_ops, &rtnl_af_ops, list) {
3930 if (af_ops->get_stats_af_size) {
3931 size += nla_total_size(
3932 af_ops->get_stats_af_size(dev));
3933
3934 /* for AF_* */
3935 size += nla_total_size(0);
3936 }
3937 }
3938 }
3939
10c9ead9
RP		 3940 return size;
3941}
3942
3943static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
3944{
3945 struct net *net = sock_net(skb->sk);
10c9ead9 3946 struct net_device *dev = NULL;
e8872a25
NA		 3947 int idxattr = 0, prividx = 0;
3948 struct if_stats_msg *ifsm;
10c9ead9
RP		 3949 struct sk_buff *nskb;
3950 u32 filter_mask;
3951 int err;
3952
4775cc1f
MK		 3953 if (nlmsg_len(nlh) < sizeof(*ifsm))
3954 return -EINVAL;
3955
10c9ead9
RP		 3956 ifsm = nlmsg_data(nlh);
3957 if (ifsm->ifindex > 0)
3958 dev = __dev_get_by_index(net, ifsm->ifindex);
3959 else
3960 return -EINVAL;
3961
3962 if (!dev)
3963 return -ENODEV;
3964
3965 filter_mask = ifsm->filter_mask;
3966 if (!filter_mask)
3967 return -EINVAL;
3968
3969 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
3970 if (!nskb)
3971 return -ENOBUFS;
3972
3973 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
3974 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
e8872a25 3975 0, filter_mask, &idxattr, &prividx);
10c9ead9
RP		 3976 if (err < 0) {
3977 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
3978 WARN_ON(err == -EMSGSIZE);
3979 kfree_skb(nskb);
3980 } else {
3981 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3982 }
3983
3984 return err;
3985}
3986
3987static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
3988{
e8872a25 3989 int h, s_h, err, s_idx, s_idxattr, s_prividx;
10c9ead9 3990 struct net *net = sock_net(skb->sk);
e8872a25 3991 unsigned int flags = NLM_F_MULTI;
10c9ead9 3992 struct if_stats_msg *ifsm;
10c9ead9 3993 struct hlist_head *head;
e8872a25 3994 struct net_device *dev;
10c9ead9 3995 u32 filter_mask = 0;
e8872a25 3996 int idx = 0;
10c9ead9
RP		 3997
3998 s_h = cb->args[0];
3999 s_idx = cb->args[1];
e8872a25
NA		 4000 s_idxattr = cb->args[2];
4001 s_prividx = cb->args[3];
10c9ead9
RP		 4002
4003 cb->seq = net->dev_base_seq;
4004
4775cc1f
MK		 4005 if (nlmsg_len(cb->nlh) < sizeof(*ifsm))
4006 return -EINVAL;
4007
10c9ead9
RP		 4008 ifsm = nlmsg_data(cb->nlh);
4009 filter_mask = ifsm->filter_mask;
4010 if (!filter_mask)
4011 return -EINVAL;
4012
4013 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4014 idx = 0;
4015 head = &net->dev_index_head[h];
4016 hlist_for_each_entry(dev, head, index_hlist) {
4017 if (idx < s_idx)
4018 goto cont;
4019 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
4020 NETLINK_CB(cb->skb).portid,
4021 cb->nlh->nlmsg_seq, 0,
e8872a25
NA		 4022 flags, filter_mask,
4023 &s_idxattr, &s_prividx);
10c9ead9
RP		 4024 /* If we ran out of room on the first message,
4025 * we're in trouble
4026 */
4027 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
4028
4029 if (err < 0)
4030 goto out;
e8872a25
NA		 4031 s_prividx = 0;
4032 s_idxattr = 0;
10c9ead9
RP		 4033 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
4034cont:
4035 idx++;
4036 }
4037 }
4038out:
e8872a25
NA		 4039 cb->args[3] = s_prividx;
4040 cb->args[2] = s_idxattr;
10c9ead9
RP		 4041 cb->args[1] = idx;
4042 cb->args[0] = h;
4043
4044 return skb->len;
4045}
4046
1da177e4
LT		 4047/* Process one rtnetlink message. */
4048
2d4bc933
JB		 4049static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
4050 struct netlink_ext_ack *extack)
1da177e4 4051{
3b1e0a65 4052 struct net *net = sock_net(skb->sk);
e2849863 4053 rtnl_doit_func doit;
617cfc75 4054 int kind;
1da177e4
LT		 4055 int family;
4056 int type;
2907c35f 4057 int err;
1da177e4 4058
1da177e4 4059 type = nlh->nlmsg_type;
1da177e4 4060 if (type > RTM_MAX)
038890fe 4061 return -EOPNOTSUPP;
1da177e4
LT		 4062
4063 type -= RTM_BASE;
4064
4065 /* All the messages must have at least 1 byte length */
573ce260 4066 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
1da177e4
LT		 4067 return 0;
4068
573ce260 4069 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
1da177e4
LT		 4070 kind = type&3;
4071
90f62cf3 4072 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 4073 return -EPERM;
1da177e4 4074
b8f3ab42 4075 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
97c53cac 4076 struct sock *rtnl;
e2849863 4077 rtnl_dumpit_func dumpit;
c7ac8679
GR		 4078 rtnl_calcit_func calcit;
4079 u16 min_dump_alloc = 0;
1da177e4 4080
e2849863
TG		 4081 dumpit = rtnl_get_dumpit(family, type);
4082 if (dumpit == NULL)
038890fe 4083 return -EOPNOTSUPP;
c7ac8679
GR		 4084 calcit = rtnl_get_calcit(family, type);
4085 if (calcit)
115c9b81 4086 min_dump_alloc = calcit(skb, nlh);
9ac4a169 4087
2907c35f 4088 __rtnl_unlock();
97c53cac 4089 rtnl = net->rtnl;
80d326fa
PNA		 4090 {
4091 struct netlink_dump_control c = {
4092 .dump = dumpit,
4093 .min_dump_alloc = min_dump_alloc,
4094 };
4095 err = netlink_dump_start(rtnl, skb, nlh, &c);
4096 }
2907c35f
ED		 4097 rtnl_lock();
4098 return err;
1da177e4
LT		 4099 }
4100
e2849863
TG		 4101 doit = rtnl_get_doit(family, type);
4102 if (doit == NULL)
038890fe 4103 return -EOPNOTSUPP;
1da177e4 4104
661d2967 4105 return doit(skb, nlh);
1da177e4
LT		 4106}
4107
cd40b7d3 4108static void rtnetlink_rcv(struct sk_buff *skb)
1da177e4 4109{
cd40b7d3
DL		 4110 rtnl_lock();
4111 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
4112 rtnl_unlock();
1da177e4
LT		 4113}
4114
1da177e4
LT		 4115static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
4116{
351638e7 4117 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
e9dc8653 4118
1da177e4 4119 switch (event) {
5138e86f 4120 case NETDEV_REBOOT:
5138e86f
VY		 4121 case NETDEV_CHANGENAME:
4122 case NETDEV_FEAT_CHANGE:
4123 case NETDEV_BONDING_FAILOVER:
5138e86f 4124 case NETDEV_NOTIFY_PEERS:
5138e86f 4125 case NETDEV_RESEND_IGMP:
5138e86f 4126 case NETDEV_CHANGEINFODATA:
bf74b20d 4127 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
1da177e4
LT		 4128 break;
4129 default:
1da177e4
LT		 4130 break;
4131 }
4132 return NOTIFY_DONE;
4133}
4134
4135static struct notifier_block rtnetlink_dev_notifier = {
4136 .notifier_call = rtnetlink_event,
4137};
4138
97c53cac 4139
2c8c1e72 4140static int __net_init rtnetlink_net_init(struct net *net)
97c53cac
DL		 4141{
4142 struct sock *sk;
a31f2d17
PNA		 4143 struct netlink_kernel_cfg cfg = {
4144 .groups = RTNLGRP_MAX,
4145 .input = rtnetlink_rcv,
4146 .cb_mutex = &rtnl_mutex,
9785e10a 4147 .flags = NL_CFG_F_NONROOT_RECV,
a31f2d17
PNA		 4148 };
4149
9f00d977 4150 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
97c53cac
DL		 4151 if (!sk)
4152 return -ENOMEM;
97c53cac
DL		 4153 net->rtnl = sk;
4154 return 0;
4155}
4156
2c8c1e72 4157static void __net_exit rtnetlink_net_exit(struct net *net)
97c53cac 4158{
775516bf
DL		 4159 netlink_kernel_release(net->rtnl);
4160 net->rtnl = NULL;
97c53cac
DL		 4161}
4162
4163static struct pernet_operations rtnetlink_net_ops = {
4164 .init = rtnetlink_net_init,
4165 .exit = rtnetlink_net_exit,
4166};
4167
1da177e4
LT		 4168void __init rtnetlink_init(void)
4169{
97c53cac 4170 if (register_pernet_subsys(&rtnetlink_net_ops))
1da177e4 4171 panic("rtnetlink_init: cannot initialize rtnetlink\n");
97c53cac 4172
1da177e4 4173 register_netdevice_notifier(&rtnetlink_dev_notifier);
340d17fc 4174
c7ac8679
GR		 4175 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
4176 rtnl_dump_ifinfo, rtnl_calcit);
4177 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL);
4178 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL);
4179 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL);
687ad8cc 4180
c7ac8679
GR		 4181 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
4182 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
a7678c70 4183 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
77162022
JF		 4184
4185 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
4186 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
4187 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL);
e5a55a89
JF		 4188
4189 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL);
407af329 4190 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL);
e5a55a89 4191 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL);
10c9ead9
RP		 4192
4193 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
4194 NULL);
1da177e4 4195}
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