blob: 5d8eb57867a96fa1730fcafd95f0801fbfc76188 [file] [log] [blame]
Thomas Gleixner2874c5f2019-05-27 08:55:01 +02001// SPDX-License-Identifier: GPL-2.0-or-later
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Routing netlink socket interface: protocol independent part.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * Fixes:
Zheng Yongjund467d0b2021-06-02 14:56:23 +080012 * Vitaly E. Lavrov RTA_OK arithmetic was wrong.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 */
14
Jakub Kicinskiee5d0322017-06-21 18:25:04 -070015#include <linux/bitops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/errno.h>
17#include <linux/module.h>
18#include <linux/types.h>
19#include <linux/socket.h>
20#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/timer.h>
22#include <linux/string.h>
23#include <linux/sockios.h>
24#include <linux/net.h>
25#include <linux/fcntl.h>
26#include <linux/mm.h>
27#include <linux/slab.h>
28#include <linux/interrupt.h>
29#include <linux/capability.h>
30#include <linux/skbuff.h>
31#include <linux/init.h>
32#include <linux/security.h>
Stephen Hemminger6756ae42006-03-20 22:23:58 -080033#include <linux/mutex.h>
Thomas Graf18237302006-08-04 23:04:54 -070034#include <linux/if_addr.h>
John Fastabend77162022012-04-15 06:43:56 +000035#include <linux/if_bridge.h>
Jiri Pirkof6f64242014-11-28 14:34:15 +010036#include <linux/if_vlan.h>
Williams, Mitch Aebc08a62010-02-10 01:44:05 +000037#include <linux/pci.h>
John Fastabend77162022012-04-15 06:43:56 +000038#include <linux/etherdevice.h>
Martin KaFai Lau58038692017-06-15 17:29:09 -070039#include <linux/bpf.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080041#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43#include <linux/inet.h>
44#include <linux/netdevice.h>
45#include <net/ip.h>
46#include <net/protocol.h>
47#include <net/arp.h>
48#include <net/route.h>
49#include <net/udp.h>
Daniel Borkmannea697632015-01-05 23:57:47 +010050#include <net/tcp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <net/sock.h>
52#include <net/pkt_sched.h>
Thomas Graf14c0b972006-08-04 03:38:38 -070053#include <net/fib_rules.h>
Thomas Grafe2849862007-03-22 11:48:11 -070054#include <net/rtnetlink.h>
Johannes Berg30ffee82009-07-10 09:51:35 +000055#include <net/net_namespace.h>
Jiri Pirkodca56c32022-11-02 17:02:11 +010056#include <net/devlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Jakub Kicinski6264f582022-04-06 14:37:54 -070058#include "dev.h"
59
Nikolay Aleksandrova428afe2018-11-24 04:34:20 +020060#define RTNL_MAX_TYPE 50
Petr Machataa1aee202023-02-02 18:59:26 +010061#define RTNL_SLAVE_MAX_TYPE 42
Kees Cookccf8dbc2018-05-30 15:20:52 -070062
Eric Dumazete0d087a2009-11-07 01:26:17 -080063struct rtnl_link {
Thomas Grafe2849862007-03-22 11:48:11 -070064 rtnl_doit_func doit;
65 rtnl_dumpit_func dumpit;
Florian Westphale4202512017-12-02 21:44:06 +010066 struct module *owner;
Florian Westphal62256f92017-08-09 20:41:52 +020067 unsigned int flags;
Florian Westphaladdf9b92017-12-02 21:44:05 +010068 struct rcu_head rcu;
Thomas Grafe2849862007-03-22 11:48:11 -070069};
70
Stephen Hemminger6756ae42006-03-20 22:23:58 -080071static DEFINE_MUTEX(rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73void rtnl_lock(void)
74{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080075 mutex_lock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076}
Eric Dumazete0d087a2009-11-07 01:26:17 -080077EXPORT_SYMBOL(rtnl_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Kirill Tkhai79ffdfc2018-03-14 22:17:20 +030079int rtnl_lock_killable(void)
80{
81 return mutex_lock_killable(&rtnl_mutex);
82}
83EXPORT_SYMBOL(rtnl_lock_killable);
84
Eric Dumazet1b5c5492016-06-13 20:21:50 -070085static struct sk_buff *defer_kfree_skb_list;
86void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
87{
88 if (head && tail) {
89 tail->next = defer_kfree_skb_list;
90 defer_kfree_skb_list = head;
91 }
92}
93EXPORT_SYMBOL(rtnl_kfree_skbs);
94
Stephen Hemminger6756ae42006-03-20 22:23:58 -080095void __rtnl_unlock(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
Eric Dumazet1b5c5492016-06-13 20:21:50 -070097 struct sk_buff *head = defer_kfree_skb_list;
98
99 defer_kfree_skb_list = NULL;
100
Johannes Berg0b5c21b2022-04-04 11:38:47 +0200101 /* Ensure that we didn't actually add any TODO item when __rtnl_unlock()
102 * is used. In some places, e.g. in cfg80211, we have code that will do
103 * something like
104 * rtnl_lock()
105 * wiphy_lock()
106 * ...
107 * rtnl_unlock()
108 *
109 * and because netdev_run_todo() acquires the RTNL for items on the list
110 * we could cause a situation such as this:
111 * Thread 1 Thread 2
112 * rtnl_lock()
113 * unregister_netdevice()
114 * __rtnl_unlock()
115 * rtnl_lock()
116 * wiphy_lock()
117 * rtnl_unlock()
118 * netdev_run_todo()
119 * __rtnl_unlock()
120 *
121 * // list not empty now
122 * // because of thread 2
123 * rtnl_lock()
124 * while (!list_empty(...))
125 * rtnl_lock()
126 * wiphy_lock()
127 * **** DEADLOCK ****
128 *
129 * However, usage of __rtnl_unlock() is rare, and so we can ensure that
130 * it's not used in cases where something is added to do the list.
131 */
132 WARN_ON(!list_empty(&net_todo_list));
133
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800134 mutex_unlock(&rtnl_mutex);
Eric Dumazet1b5c5492016-06-13 20:21:50 -0700135
136 while (head) {
137 struct sk_buff *next = head->next;
138
139 kfree_skb(head);
140 cond_resched();
141 head = next;
142 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143}
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145void rtnl_unlock(void)
146{
Herbert Xu58ec3b42008-10-07 15:50:03 -0700147 /* This fellow will unlock it for us. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 netdev_run_todo();
149}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800150EXPORT_SYMBOL(rtnl_unlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800152int rtnl_trylock(void)
153{
154 return mutex_trylock(&rtnl_mutex);
155}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800156EXPORT_SYMBOL(rtnl_trylock);
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800157
Patrick McHardyc9c1014b2008-04-23 22:10:48 -0700158int rtnl_is_locked(void)
159{
160 return mutex_is_locked(&rtnl_mutex);
161}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800162EXPORT_SYMBOL(rtnl_is_locked);
Patrick McHardyc9c1014b2008-04-23 22:10:48 -0700163
Vlad Buslov6f995282018-09-24 19:22:49 +0300164bool refcount_dec_and_rtnl_lock(refcount_t *r)
165{
166 return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
167}
168EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
169
Paul E. McKenneya898def2010-02-22 17:04:49 -0800170#ifdef CONFIG_PROVE_LOCKING
Yaowei Bai0cbf3342015-10-08 21:29:02 +0800171bool lockdep_rtnl_is_held(void)
Paul E. McKenneya898def2010-02-22 17:04:49 -0800172{
173 return lockdep_is_held(&rtnl_mutex);
174}
175EXPORT_SYMBOL(lockdep_rtnl_is_held);
176#endif /* #ifdef CONFIG_PROVE_LOCKING */
177
Jakub Kicinski51e13682020-12-09 18:16:08 -0800178static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
Thomas Grafe2849862007-03-22 11:48:11 -0700179
180static inline int rtm_msgindex(int msgtype)
181{
182 int msgindex = msgtype - RTM_BASE;
183
184 /*
185 * msgindex < 0 implies someone tried to register a netlink
186 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
187 * the message type has not been added to linux/rtnetlink.h
188 */
189 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
190
191 return msgindex;
192}
193
Florian Westphaladdf9b92017-12-02 21:44:05 +0100194static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
195{
Jakub Kicinski51e13682020-12-09 18:16:08 -0800196 struct rtnl_link __rcu **tab;
Florian Westphaladdf9b92017-12-02 21:44:05 +0100197
198 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
199 protocol = PF_UNSPEC;
200
201 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
202 if (!tab)
203 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
204
Jakub Kicinski51e13682020-12-09 18:16:08 -0800205 return rcu_dereference_rtnl(tab[msgtype]);
Florian Westphaladdf9b92017-12-02 21:44:05 +0100206}
207
Florian Westphale4202512017-12-02 21:44:06 +0100208static int rtnl_register_internal(struct module *owner,
209 int protocol, int msgtype,
210 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
211 unsigned int flags)
Thomas Grafe2849862007-03-22 11:48:11 -0700212{
Florian Westphalb0e9fe12017-12-04 22:42:30 +0100213 struct rtnl_link *link, *old;
214 struct rtnl_link __rcu **tab;
Thomas Grafe2849862007-03-22 11:48:11 -0700215 int msgindex;
Florian Westphaladdf9b92017-12-02 21:44:05 +0100216 int ret = -ENOBUFS;
Thomas Grafe2849862007-03-22 11:48:11 -0700217
Patrick McHardy25239ce2010-04-26 16:02:05 +0200218 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700219 msgindex = rtm_msgindex(msgtype);
220
Florian Westphaladdf9b92017-12-02 21:44:05 +0100221 rtnl_lock();
Jakub Kicinski51e13682020-12-09 18:16:08 -0800222 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
Thomas Grafe2849862007-03-22 11:48:11 -0700223 if (tab == NULL) {
Florian Westphaladdf9b92017-12-02 21:44:05 +0100224 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
225 if (!tab)
226 goto unlock;
Thomas Grafe2849862007-03-22 11:48:11 -0700227
Florian Westphaladdf9b92017-12-02 21:44:05 +0100228 /* ensures we see the 0 stores */
Florian Westphal6853dd42017-08-09 20:41:51 +0200229 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
Thomas Grafe2849862007-03-22 11:48:11 -0700230 }
231
Florian Westphaladdf9b92017-12-02 21:44:05 +0100232 old = rtnl_dereference(tab[msgindex]);
233 if (old) {
234 link = kmemdup(old, sizeof(*old), GFP_KERNEL);
235 if (!link)
236 goto unlock;
237 } else {
238 link = kzalloc(sizeof(*link), GFP_KERNEL);
239 if (!link)
240 goto unlock;
241 }
Thomas Grafe2849862007-03-22 11:48:11 -0700242
Florian Westphale4202512017-12-02 21:44:06 +0100243 WARN_ON(link->owner && link->owner != owner);
244 link->owner = owner;
245
Florian Westphaladdf9b92017-12-02 21:44:05 +0100246 WARN_ON(doit && link->doit && link->doit != doit);
247 if (doit)
248 link->doit = doit;
249 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
250 if (dumpit)
251 link->dumpit = dumpit;
252
Nikolay Aleksandrova6cec0b2022-04-13 13:51:55 +0300253 WARN_ON(rtnl_msgtype_kind(msgtype) != RTNL_KIND_DEL &&
254 (flags & RTNL_FLAG_BULK_DEL_SUPPORTED));
Florian Westphaladdf9b92017-12-02 21:44:05 +0100255 link->flags |= flags;
256
257 /* publish protocol:msgtype */
258 rcu_assign_pointer(tab[msgindex], link);
259 ret = 0;
260 if (old)
261 kfree_rcu(old, rcu);
262unlock:
263 rtnl_unlock();
264 return ret;
Thomas Grafe2849862007-03-22 11:48:11 -0700265}
Florian Westphale4202512017-12-02 21:44:06 +0100266
267/**
268 * rtnl_register_module - Register a rtnetlink message type
269 *
270 * @owner: module registering the hook (THIS_MODULE)
271 * @protocol: Protocol family or PF_UNSPEC
272 * @msgtype: rtnetlink message type
273 * @doit: Function pointer called for each request message
274 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
Zheng Yongjund467d0b2021-06-02 14:56:23 +0800275 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
Florian Westphale4202512017-12-02 21:44:06 +0100276 *
277 * Like rtnl_register, but for use by removable modules.
278 */
279int rtnl_register_module(struct module *owner,
280 int protocol, int msgtype,
281 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
282 unsigned int flags)
283{
284 return rtnl_register_internal(owner, protocol, msgtype,
285 doit, dumpit, flags);
286}
287EXPORT_SYMBOL_GPL(rtnl_register_module);
288
289/**
Florian Westphal16feebc2017-12-02 21:44:08 +0100290 * rtnl_register - Register a rtnetlink message type
Florian Westphale4202512017-12-02 21:44:06 +0100291 * @protocol: Protocol family or PF_UNSPEC
292 * @msgtype: rtnetlink message type
293 * @doit: Function pointer called for each request message
294 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
Zheng Yongjund467d0b2021-06-02 14:56:23 +0800295 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions
Florian Westphale4202512017-12-02 21:44:06 +0100296 *
297 * Registers the specified function pointers (at least one of them has
298 * to be non-NULL) to be called whenever a request message for the
299 * specified protocol family and message type is received.
300 *
301 * The special protocol family PF_UNSPEC may be used to define fallback
302 * function pointers for the case when no entry for the specific protocol
303 * family exists.
Thomas Grafe2849862007-03-22 11:48:11 -0700304 */
305void rtnl_register(int protocol, int msgtype,
Greg Rosec7ac8672011-06-10 01:27:09 +0000306 rtnl_doit_func doit, rtnl_dumpit_func dumpit,
Florian Westphalb97bac62017-08-09 20:41:48 +0200307 unsigned int flags)
Thomas Grafe2849862007-03-22 11:48:11 -0700308{
Florian Westphal16feebc2017-12-02 21:44:08 +0100309 int err;
310
311 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
312 flags);
313 if (err)
314 pr_err("Unable to register rtnetlink message handler, "
315 "protocol = %d, message type = %d\n", protocol, msgtype);
Thomas Grafe2849862007-03-22 11:48:11 -0700316}
Thomas Grafe2849862007-03-22 11:48:11 -0700317
318/**
319 * rtnl_unregister - Unregister a rtnetlink message type
320 * @protocol: Protocol family or PF_UNSPEC
321 * @msgtype: rtnetlink message type
322 *
323 * Returns 0 on success or a negative error code.
324 */
325int rtnl_unregister(int protocol, int msgtype)
326{
Jakub Kicinski51e13682020-12-09 18:16:08 -0800327 struct rtnl_link __rcu **tab;
328 struct rtnl_link *link;
Thomas Grafe2849862007-03-22 11:48:11 -0700329 int msgindex;
330
Patrick McHardy25239ce2010-04-26 16:02:05 +0200331 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700332 msgindex = rtm_msgindex(msgtype);
333
Florian Westphal6853dd42017-08-09 20:41:51 +0200334 rtnl_lock();
Florian Westphaladdf9b92017-12-02 21:44:05 +0100335 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
336 if (!tab) {
Florian Westphal6853dd42017-08-09 20:41:51 +0200337 rtnl_unlock();
Thomas Grafe2849862007-03-22 11:48:11 -0700338 return -ENOENT;
Florian Westphal6853dd42017-08-09 20:41:51 +0200339 }
Thomas Grafe2849862007-03-22 11:48:11 -0700340
Jakub Kicinski51e13682020-12-09 18:16:08 -0800341 link = rtnl_dereference(tab[msgindex]);
Yajun Deng4fc29982021-09-18 14:36:07 +0800342 RCU_INIT_POINTER(tab[msgindex], NULL);
Florian Westphal6853dd42017-08-09 20:41:51 +0200343 rtnl_unlock();
Thomas Grafe2849862007-03-22 11:48:11 -0700344
Florian Westphaladdf9b92017-12-02 21:44:05 +0100345 kfree_rcu(link, rcu);
346
Thomas Grafe2849862007-03-22 11:48:11 -0700347 return 0;
348}
Thomas Grafe2849862007-03-22 11:48:11 -0700349EXPORT_SYMBOL_GPL(rtnl_unregister);
350
351/**
352 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
353 * @protocol : Protocol family or PF_UNSPEC
354 *
355 * Identical to calling rtnl_unregster() for all registered message types
356 * of a certain protocol family.
357 */
358void rtnl_unregister_all(int protocol)
359{
Jakub Kicinski51e13682020-12-09 18:16:08 -0800360 struct rtnl_link __rcu **tab;
361 struct rtnl_link *link;
Florian Westphaladdf9b92017-12-02 21:44:05 +0100362 int msgindex;
Florian Westphal019a3162017-08-09 20:41:49 +0200363
Patrick McHardy25239ce2010-04-26 16:02:05 +0200364 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
Thomas Grafe2849862007-03-22 11:48:11 -0700365
Florian Westphal019a3162017-08-09 20:41:49 +0200366 rtnl_lock();
Jakub Kicinski51e13682020-12-09 18:16:08 -0800367 tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
Sabrina Dubrocaf707ef62018-08-28 13:40:53 +0200368 if (!tab) {
369 rtnl_unlock();
370 return;
371 }
Florian Westphal6853dd42017-08-09 20:41:51 +0200372 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
Florian Westphaladdf9b92017-12-02 21:44:05 +0100373 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
Jakub Kicinski51e13682020-12-09 18:16:08 -0800374 link = rtnl_dereference(tab[msgindex]);
Florian Westphaladdf9b92017-12-02 21:44:05 +0100375 if (!link)
376 continue;
377
Yajun Deng4fc29982021-09-18 14:36:07 +0800378 RCU_INIT_POINTER(tab[msgindex], NULL);
Florian Westphaladdf9b92017-12-02 21:44:05 +0100379 kfree_rcu(link, rcu);
380 }
Florian Westphal019a3162017-08-09 20:41:49 +0200381 rtnl_unlock();
382
Florian Westphal6853dd42017-08-09 20:41:51 +0200383 synchronize_net();
384
Florian Westphaladdf9b92017-12-02 21:44:05 +0100385 kfree(tab);
Thomas Grafe2849862007-03-22 11:48:11 -0700386}
Thomas Grafe2849862007-03-22 11:48:11 -0700387EXPORT_SYMBOL_GPL(rtnl_unregister_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Patrick McHardy38f7b872007-06-13 12:03:51 -0700389static LIST_HEAD(link_ops);
390
Eric Dumazetc63044f2011-12-13 11:38:00 +0000391static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
392{
393 const struct rtnl_link_ops *ops;
394
395 list_for_each_entry(ops, &link_ops, list) {
396 if (!strcmp(ops->kind, kind))
397 return ops;
398 }
399 return NULL;
400}
401
Patrick McHardy38f7b872007-06-13 12:03:51 -0700402/**
403 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
404 * @ops: struct rtnl_link_ops * to register
405 *
406 * The caller must hold the rtnl_mutex. This function should be used
407 * by drivers that create devices during module initialization. It
408 * must be called before registering the devices.
409 *
410 * Returns 0 on success or a negative error code.
411 */
412int __rtnl_link_register(struct rtnl_link_ops *ops)
413{
Eric Dumazetc63044f2011-12-13 11:38:00 +0000414 if (rtnl_link_ops_get(ops->kind))
415 return -EEXIST;
416
Johannes Berg8c713dc2021-06-12 10:20:54 +0200417 /* The check for alloc/setup is here because if ops
Jiri Pirkob0ab2fa2014-06-26 09:58:25 +0200418 * does not have that filled up, it is not possible
419 * to use the ops for creating device. So do not
420 * fill up dellink as well. That disables rtnl_dellink.
421 */
Johannes Berg8c713dc2021-06-12 10:20:54 +0200422 if ((ops->alloc || ops->setup) && !ops->dellink)
Eric Dumazet23289a32009-10-27 07:06:36 +0000423 ops->dellink = unregister_netdevice_queue;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700424
Patrick McHardy38f7b872007-06-13 12:03:51 -0700425 list_add_tail(&ops->list, &link_ops);
426 return 0;
427}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700428EXPORT_SYMBOL_GPL(__rtnl_link_register);
429
430/**
431 * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
432 * @ops: struct rtnl_link_ops * to register
433 *
434 * Returns 0 on success or a negative error code.
435 */
436int rtnl_link_register(struct rtnl_link_ops *ops)
437{
438 int err;
439
Kees Cookccf8dbc2018-05-30 15:20:52 -0700440 /* Sanity-check max sizes to avoid stack buffer overflow. */
441 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
442 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
443 return -EINVAL;
444
Patrick McHardy38f7b872007-06-13 12:03:51 -0700445 rtnl_lock();
446 err = __rtnl_link_register(ops);
447 rtnl_unlock();
448 return err;
449}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700450EXPORT_SYMBOL_GPL(rtnl_link_register);
451
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700452static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
453{
454 struct net_device *dev;
Eric Dumazet23289a32009-10-27 07:06:36 +0000455 LIST_HEAD(list_kill);
456
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700457 for_each_netdev(net, dev) {
Eric Dumazet23289a32009-10-27 07:06:36 +0000458 if (dev->rtnl_link_ops == ops)
459 ops->dellink(dev, &list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700460 }
Eric Dumazet23289a32009-10-27 07:06:36 +0000461 unregister_netdevice_many(&list_kill);
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700462}
463
Patrick McHardy38f7b872007-06-13 12:03:51 -0700464/**
465 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
466 * @ops: struct rtnl_link_ops * to unregister
467 *
Kirill Tkhai554873e2018-03-30 19:38:37 +0300468 * The caller must hold the rtnl_mutex and guarantee net_namespace_list
469 * integrity (hold pernet_ops_rwsem for writing to close the race
470 * with setup_net() and cleanup_net()).
Patrick McHardy38f7b872007-06-13 12:03:51 -0700471 */
472void __rtnl_link_unregister(struct rtnl_link_ops *ops)
473{
Eric W. Biederman881d9662007-09-17 11:56:21 -0700474 struct net *net;
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700475
Eric W. Biederman881d9662007-09-17 11:56:21 -0700476 for_each_net(net) {
Pavel Emelyanov669f87b2008-04-16 00:46:52 -0700477 __rtnl_kill_links(net, ops);
Patrick McHardy2d85cba2007-07-11 19:42:13 -0700478 }
Patrick McHardy38f7b872007-06-13 12:03:51 -0700479 list_del(&ops->list);
480}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700481EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
482
Cong Wang200b9162014-05-12 15:11:20 -0700483/* Return with the rtnl_lock held when there are no network
484 * devices unregistering in any network namespace.
485 */
486static void rtnl_lock_unregistering_all(void)
487{
488 struct net *net;
489 bool unregistering;
Peter Zijlstraff960a72014-10-29 17:04:56 +0100490 DEFINE_WAIT_FUNC(wait, woken_wake_function);
Cong Wang200b9162014-05-12 15:11:20 -0700491
Peter Zijlstraff960a72014-10-29 17:04:56 +0100492 add_wait_queue(&netdev_unregistering_wq, &wait);
Cong Wang200b9162014-05-12 15:11:20 -0700493 for (;;) {
Cong Wang200b9162014-05-12 15:11:20 -0700494 unregistering = false;
495 rtnl_lock();
Kirill Tkhaif0b07bb12018-03-29 19:20:32 +0300496 /* We held write locked pernet_ops_rwsem, and parallel
497 * setup_net() and cleanup_net() are not possible.
498 */
Cong Wang200b9162014-05-12 15:11:20 -0700499 for_each_net(net) {
Eric Dumazetede6c392022-02-09 18:59:32 -0800500 if (atomic_read(&net->dev_unreg_count) > 0) {
Cong Wang200b9162014-05-12 15:11:20 -0700501 unregistering = true;
502 break;
503 }
504 }
505 if (!unregistering)
506 break;
507 __rtnl_unlock();
Peter Zijlstraff960a72014-10-29 17:04:56 +0100508
509 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
Cong Wang200b9162014-05-12 15:11:20 -0700510 }
Peter Zijlstraff960a72014-10-29 17:04:56 +0100511 remove_wait_queue(&netdev_unregistering_wq, &wait);
Cong Wang200b9162014-05-12 15:11:20 -0700512}
513
Patrick McHardy38f7b872007-06-13 12:03:51 -0700514/**
515 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
516 * @ops: struct rtnl_link_ops * to unregister
517 */
518void rtnl_link_unregister(struct rtnl_link_ops *ops)
519{
Kirill Tkhai8518e9b2018-03-27 18:02:32 +0300520 /* Close the race with setup_net() and cleanup_net() */
Kirill Tkhai4420bf22018-03-27 18:02:23 +0300521 down_write(&pernet_ops_rwsem);
Cong Wang200b9162014-05-12 15:11:20 -0700522 rtnl_lock_unregistering_all();
Patrick McHardy38f7b872007-06-13 12:03:51 -0700523 __rtnl_link_unregister(ops);
524 rtnl_unlock();
Kirill Tkhai4420bf22018-03-27 18:02:23 +0300525 up_write(&pernet_ops_rwsem);
Patrick McHardy38f7b872007-06-13 12:03:51 -0700526}
Patrick McHardy38f7b872007-06-13 12:03:51 -0700527EXPORT_SYMBOL_GPL(rtnl_link_unregister);
528
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100529static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
530{
531 struct net_device *master_dev;
532 const struct rtnl_link_ops *ops;
Florian Westphal8515ae32017-08-10 16:52:59 +0200533 size_t size = 0;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100534
Florian Westphal8515ae32017-08-10 16:52:59 +0200535 rcu_read_lock();
536
537 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100538 if (!master_dev)
Florian Westphal8515ae32017-08-10 16:52:59 +0200539 goto out;
540
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100541 ops = master_dev->rtnl_link_ops;
Fernando Luis Vazquez Cao6049f252014-02-04 19:35:02 +0900542 if (!ops || !ops->get_slave_size)
Florian Westphal8515ae32017-08-10 16:52:59 +0200543 goto out;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100544 /* IFLA_INFO_SLAVE_DATA + nested data */
Florian Westphal8515ae32017-08-10 16:52:59 +0200545 size = nla_total_size(sizeof(struct nlattr)) +
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100546 ops->get_slave_size(master_dev, dev);
Florian Westphal8515ae32017-08-10 16:52:59 +0200547
548out:
549 rcu_read_unlock();
550 return size;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100551}
552
Patrick McHardy38f7b872007-06-13 12:03:51 -0700553static size_t rtnl_link_get_size(const struct net_device *dev)
554{
555 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
556 size_t size;
557
558 if (!ops)
559 return 0;
560
Thomas Graf369cf772010-11-11 15:47:59 +0000561 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
562 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
Patrick McHardy38f7b872007-06-13 12:03:51 -0700563
564 if (ops->get_size)
565 /* IFLA_INFO_DATA + nested data */
Thomas Graf369cf772010-11-11 15:47:59 +0000566 size += nla_total_size(sizeof(struct nlattr)) +
Patrick McHardy38f7b872007-06-13 12:03:51 -0700567 ops->get_size(dev);
568
569 if (ops->get_xstats_size)
Thomas Graf369cf772010-11-11 15:47:59 +0000570 /* IFLA_INFO_XSTATS */
571 size += nla_total_size(ops->get_xstats_size(dev));
Patrick McHardy38f7b872007-06-13 12:03:51 -0700572
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100573 size += rtnl_link_get_slave_info_data_size(dev);
574
Patrick McHardy38f7b872007-06-13 12:03:51 -0700575 return size;
576}
577
Thomas Graff8ff1822010-11-16 04:30:14 +0000578static LIST_HEAD(rtnl_af_ops);
579
580static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
581{
582 const struct rtnl_af_ops *ops;
583
Cong Wanga1002432021-05-08 11:00:33 -0700584 ASSERT_RTNL();
585
586 list_for_each_entry(ops, &rtnl_af_ops, list) {
Thomas Graff8ff1822010-11-16 04:30:14 +0000587 if (ops->family == family)
588 return ops;
589 }
590
591 return NULL;
592}
593
594/**
Thomas Graff8ff1822010-11-16 04:30:14 +0000595 * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
596 * @ops: struct rtnl_af_ops * to register
597 *
598 * Returns 0 on success or a negative error code.
599 */
stephen hemminger3678a9d2013-12-30 10:41:32 -0800600void rtnl_af_register(struct rtnl_af_ops *ops)
Thomas Graff8ff1822010-11-16 04:30:14 +0000601{
Thomas Graff8ff1822010-11-16 04:30:14 +0000602 rtnl_lock();
Florian Westphal5fa85a02017-10-16 15:44:36 +0200603 list_add_tail_rcu(&ops->list, &rtnl_af_ops);
Thomas Graff8ff1822010-11-16 04:30:14 +0000604 rtnl_unlock();
Thomas Graff8ff1822010-11-16 04:30:14 +0000605}
606EXPORT_SYMBOL_GPL(rtnl_af_register);
607
608/**
Thomas Graff8ff1822010-11-16 04:30:14 +0000609 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
610 * @ops: struct rtnl_af_ops * to unregister
611 */
612void rtnl_af_unregister(struct rtnl_af_ops *ops)
613{
614 rtnl_lock();
Florian Westphal5fa85a02017-10-16 15:44:36 +0200615 list_del_rcu(&ops->list);
Thomas Graff8ff1822010-11-16 04:30:14 +0000616 rtnl_unlock();
Florian Westphal5fa85a02017-10-16 15:44:36 +0200617
618 synchronize_rcu();
Thomas Graff8ff1822010-11-16 04:30:14 +0000619}
620EXPORT_SYMBOL_GPL(rtnl_af_unregister);
621
Arad, Ronenb1974ed2015-10-19 09:23:28 -0700622static size_t rtnl_link_get_af_size(const struct net_device *dev,
623 u32 ext_filter_mask)
Thomas Graff8ff1822010-11-16 04:30:14 +0000624{
625 struct rtnl_af_ops *af_ops;
626 size_t size;
627
628 /* IFLA_AF_SPEC */
629 size = nla_total_size(sizeof(struct nlattr));
630
Florian Westphal5fa85a02017-10-16 15:44:36 +0200631 rcu_read_lock();
632 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
Thomas Graff8ff1822010-11-16 04:30:14 +0000633 if (af_ops->get_link_af_size) {
634 /* AF_* + nested data */
635 size += nla_total_size(sizeof(struct nlattr)) +
Arad, Ronenb1974ed2015-10-19 09:23:28 -0700636 af_ops->get_link_af_size(dev, ext_filter_mask);
Thomas Graff8ff1822010-11-16 04:30:14 +0000637 }
638 }
Florian Westphal5fa85a02017-10-16 15:44:36 +0200639 rcu_read_unlock();
Thomas Graff8ff1822010-11-16 04:30:14 +0000640
641 return size;
642}
643
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100644static bool rtnl_have_link_slave_info(const struct net_device *dev)
645{
646 struct net_device *master_dev;
Florian Westphal4c82a952017-09-26 13:58:43 +0200647 bool ret = false;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100648
Florian Westphal4c82a952017-09-26 13:58:43 +0200649 rcu_read_lock();
650
651 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
Jiri Pirko813f0202014-01-23 19:19:21 +0100652 if (master_dev && master_dev->rtnl_link_ops)
Florian Westphal4c82a952017-09-26 13:58:43 +0200653 ret = true;
654 rcu_read_unlock();
655 return ret;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100656}
657
658static int rtnl_link_slave_info_fill(struct sk_buff *skb,
659 const struct net_device *dev)
660{
661 struct net_device *master_dev;
662 const struct rtnl_link_ops *ops;
663 struct nlattr *slave_data;
664 int err;
665
666 master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
667 if (!master_dev)
668 return 0;
669 ops = master_dev->rtnl_link_ops;
670 if (!ops)
671 return 0;
672 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
673 return -EMSGSIZE;
674 if (ops->fill_slave_info) {
Michal Kubecekae0be8d2019-04-26 11:13:06 +0200675 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100676 if (!slave_data)
677 return -EMSGSIZE;
678 err = ops->fill_slave_info(skb, master_dev, dev);
679 if (err < 0)
680 goto err_cancel_slave_data;
681 nla_nest_end(skb, slave_data);
682 }
683 return 0;
684
685err_cancel_slave_data:
686 nla_nest_cancel(skb, slave_data);
687 return err;
688}
689
690static int rtnl_link_info_fill(struct sk_buff *skb,
691 const struct net_device *dev)
Patrick McHardy38f7b872007-06-13 12:03:51 -0700692{
693 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100694 struct nlattr *data;
695 int err;
696
697 if (!ops)
698 return 0;
699 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
700 return -EMSGSIZE;
701 if (ops->fill_xstats) {
702 err = ops->fill_xstats(skb, dev);
703 if (err < 0)
704 return err;
705 }
706 if (ops->fill_info) {
Michal Kubecekae0be8d2019-04-26 11:13:06 +0200707 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100708 if (data == NULL)
709 return -EMSGSIZE;
710 err = ops->fill_info(skb, dev);
711 if (err < 0)
712 goto err_cancel_data;
713 nla_nest_end(skb, data);
714 }
715 return 0;
716
717err_cancel_data:
718 nla_nest_cancel(skb, data);
719 return err;
720}
721
722static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
723{
724 struct nlattr *linkinfo;
Patrick McHardy38f7b872007-06-13 12:03:51 -0700725 int err = -EMSGSIZE;
726
Michal Kubecekae0be8d2019-04-26 11:13:06 +0200727 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
Patrick McHardy38f7b872007-06-13 12:03:51 -0700728 if (linkinfo == NULL)
729 goto out;
730
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100731 err = rtnl_link_info_fill(skb, dev);
732 if (err < 0)
Patrick McHardy38f7b872007-06-13 12:03:51 -0700733 goto err_cancel_link;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +0100734
735 err = rtnl_link_slave_info_fill(skb, dev);
736 if (err < 0)
737 goto err_cancel_link;
Patrick McHardy38f7b872007-06-13 12:03:51 -0700738
739 nla_nest_end(skb, linkinfo);
740 return 0;
741
Patrick McHardy38f7b872007-06-13 12:03:51 -0700742err_cancel_link:
743 nla_nest_cancel(skb, linkinfo);
744out:
745 return err;
746}
747
Eric Dumazet95c96172012-04-15 05:58:06 +0000748int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800750 struct sock *rtnl = net->rtnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Yajun Dengcfdf0d92021-07-15 20:12:57 +0800752 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753}
754
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800755int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
Thomas Graf2942e902006-08-15 00:30:25 -0700756{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800757 struct sock *rtnl = net->rtnl;
758
Thomas Graf2942e902006-08-15 00:30:25 -0700759 return nlmsg_unicast(rtnl, skb, pid);
760}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800761EXPORT_SYMBOL(rtnl_unicast);
Thomas Graf2942e902006-08-15 00:30:25 -0700762
Pablo Neira Ayuso1ce85fe2009-02-24 23:18:28 -0800763void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
Hangbin Liu1d997f12022-10-28 04:42:21 -0400764 const struct nlmsghdr *nlh, gfp_t flags)
Thomas Graf97676b62006-08-15 00:31:41 -0700765{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800766 struct sock *rtnl = net->rtnl;
Thomas Graf97676b62006-08-15 00:31:41 -0700767
Yajun Dengf9b282b2021-07-27 11:41:41 +0800768 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags);
Thomas Graf97676b62006-08-15 00:31:41 -0700769}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800770EXPORT_SYMBOL(rtnl_notify);
Thomas Graf97676b62006-08-15 00:31:41 -0700771
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800772void rtnl_set_sk_err(struct net *net, u32 group, int error)
Thomas Graf97676b62006-08-15 00:31:41 -0700773{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -0800774 struct sock *rtnl = net->rtnl;
775
Thomas Graf97676b62006-08-15 00:31:41 -0700776 netlink_set_err(rtnl, 0, group, error);
777}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800778EXPORT_SYMBOL(rtnl_set_sk_err);
Thomas Graf97676b62006-08-15 00:31:41 -0700779
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
781{
Thomas Graf2d7202b2006-08-22 00:01:27 -0700782 struct nlattr *mx;
783 int i, valid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
David Ahernc22a1332019-06-21 16:27:16 -0700785 /* nothing is dumped for dst_default_metrics, so just skip the loop */
786 if (metrics == dst_default_metrics.metrics)
787 return 0;
788
Michal Kubecekae0be8d2019-04-26 11:13:06 +0200789 mx = nla_nest_start_noflag(skb, RTA_METRICS);
Thomas Graf2d7202b2006-08-22 00:01:27 -0700790 if (mx == NULL)
791 return -ENOBUFS;
792
793 for (i = 0; i < RTAX_MAX; i++) {
794 if (metrics[i]) {
Daniel Borkmannea697632015-01-05 23:57:47 +0100795 if (i == RTAX_CC_ALGO - 1) {
796 char tmp[TCP_CA_NAME_MAX], *name;
797
798 name = tcp_ca_get_name_by_key(metrics[i], tmp);
799 if (!name)
800 continue;
801 if (nla_put_string(skb, i + 1, name))
802 goto nla_put_failure;
Daniel Borkmannc3a8d942015-08-31 15:58:47 +0200803 } else if (i == RTAX_FEATURES - 1) {
804 u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
805
Phil Sutterf8edcd12016-08-23 13:14:31 +0200806 if (!user_features)
807 continue;
Daniel Borkmannc3a8d942015-08-31 15:58:47 +0200808 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
809 if (nla_put_u32(skb, i + 1, user_features))
810 goto nla_put_failure;
Daniel Borkmannea697632015-01-05 23:57:47 +0100811 } else {
812 if (nla_put_u32(skb, i + 1, metrics[i]))
813 goto nla_put_failure;
814 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700815 valid++;
Thomas Graf2d7202b2006-08-22 00:01:27 -0700816 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
David S. Millera57d27f2006-08-22 22:20:14 -0700819 if (!valid) {
820 nla_nest_cancel(skb, mx);
821 return 0;
822 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700823
824 return nla_nest_end(skb, mx);
825
826nla_put_failure:
Thomas Grafbc3ed282008-06-03 16:36:54 -0700827 nla_nest_cancel(skb, mx);
828 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829}
Eric Dumazete0d087a2009-11-07 01:26:17 -0800830EXPORT_SYMBOL(rtnetlink_put_metrics);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
Thomas Grafe3703b32006-11-27 09:27:07 -0800832int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
David S. Miller87a50692012-07-10 05:06:14 -0700833 long expires, u32 error)
Thomas Grafe3703b32006-11-27 09:27:07 -0800834{
835 struct rta_cacheinfo ci = {
Thomas Grafe3703b32006-11-27 09:27:07 -0800836 .rta_error = error,
837 .rta_id = id,
Thomas Grafe3703b32006-11-27 09:27:07 -0800838 };
839
David Ahern39407462018-04-17 17:33:08 -0700840 if (dst) {
841 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
842 ci.rta_used = dst->__use;
843 ci.rta_clntref = atomic_read(&dst->__refcnt);
844 }
Li Wei82539472012-07-29 16:01:30 +0000845 if (expires) {
846 unsigned long clock;
Thomas Grafe3703b32006-11-27 09:27:07 -0800847
Li Wei82539472012-07-29 16:01:30 +0000848 clock = jiffies_to_clock_t(abs(expires));
849 clock = min_t(unsigned long, clock, INT_MAX);
850 ci.rta_expires = (expires > 0) ? clock : -clock;
851 }
Thomas Grafe3703b32006-11-27 09:27:07 -0800852 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
853}
Thomas Grafe3703b32006-11-27 09:27:07 -0800854EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
David S. Miller93b2d4a2008-02-17 18:35:07 -0800856static void set_operstate(struct net_device *dev, unsigned char transition)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800857{
858 unsigned char operstate = dev->operstate;
859
Eric Dumazete0d087a2009-11-07 01:26:17 -0800860 switch (transition) {
Stefan Rompfb00055a2006-03-20 17:09:11 -0800861 case IF_OPER_UP:
862 if ((operstate == IF_OPER_DORMANT ||
Andrew Lunneec517cd2020-04-20 00:11:50 +0200863 operstate == IF_OPER_TESTING ||
Stefan Rompfb00055a2006-03-20 17:09:11 -0800864 operstate == IF_OPER_UNKNOWN) &&
Andrew Lunneec517cd2020-04-20 00:11:50 +0200865 !netif_dormant(dev) && !netif_testing(dev))
Stefan Rompfb00055a2006-03-20 17:09:11 -0800866 operstate = IF_OPER_UP;
867 break;
868
Andrew Lunneec517cd2020-04-20 00:11:50 +0200869 case IF_OPER_TESTING:
Juhee Kangabbc7922022-08-31 21:58:45 +0900870 if (netif_oper_up(dev))
Andrew Lunneec517cd2020-04-20 00:11:50 +0200871 operstate = IF_OPER_TESTING;
872 break;
873
Stefan Rompfb00055a2006-03-20 17:09:11 -0800874 case IF_OPER_DORMANT:
Juhee Kangabbc7922022-08-31 21:58:45 +0900875 if (netif_oper_up(dev))
Stefan Rompfb00055a2006-03-20 17:09:11 -0800876 operstate = IF_OPER_DORMANT;
877 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700878 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800879
880 if (dev->operstate != operstate) {
Sebastian Andrzej Siewiorfd888e82021-11-26 17:15:29 +0100881 write_lock(&dev_base_lock);
Stefan Rompfb00055a2006-03-20 17:09:11 -0800882 dev->operstate = operstate;
Sebastian Andrzej Siewiorfd888e82021-11-26 17:15:29 +0100883 write_unlock(&dev_base_lock);
David S. Miller93b2d4a2008-02-17 18:35:07 -0800884 netdev_state_change(dev);
885 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800886}
887
Jiri Bencb1beb682012-07-27 02:58:22 +0000888static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
889{
890 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
891 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
892}
893
Patrick McHardy3729d502010-02-26 06:34:54 +0000894static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
895 const struct ifinfomsg *ifm)
896{
897 unsigned int flags = ifm->ifi_flags;
898
899 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
900 if (ifm->ifi_change)
901 flags = (flags & ifm->ifi_change) |
Jiri Bencb1beb682012-07-27 02:58:22 +0000902 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
Patrick McHardy3729d502010-02-26 06:34:54 +0000903
904 return flags;
905}
906
Thomas Grafb60c5112006-08-04 23:05:34 -0700907static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000908 const struct rtnl_link_stats64 *b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909{
Thomas Grafb60c5112006-08-04 23:05:34 -0700910 a->rx_packets = b->rx_packets;
911 a->tx_packets = b->tx_packets;
912 a->rx_bytes = b->rx_bytes;
913 a->tx_bytes = b->tx_bytes;
914 a->rx_errors = b->rx_errors;
915 a->tx_errors = b->tx_errors;
916 a->rx_dropped = b->rx_dropped;
917 a->tx_dropped = b->tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Thomas Grafb60c5112006-08-04 23:05:34 -0700919 a->multicast = b->multicast;
920 a->collisions = b->collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
Thomas Grafb60c5112006-08-04 23:05:34 -0700922 a->rx_length_errors = b->rx_length_errors;
923 a->rx_over_errors = b->rx_over_errors;
924 a->rx_crc_errors = b->rx_crc_errors;
925 a->rx_frame_errors = b->rx_frame_errors;
926 a->rx_fifo_errors = b->rx_fifo_errors;
927 a->rx_missed_errors = b->rx_missed_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
Thomas Grafb60c5112006-08-04 23:05:34 -0700929 a->tx_aborted_errors = b->tx_aborted_errors;
930 a->tx_carrier_errors = b->tx_carrier_errors;
931 a->tx_fifo_errors = b->tx_fifo_errors;
932 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
933 a->tx_window_errors = b->tx_window_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934
Thomas Grafb60c5112006-08-04 23:05:34 -0700935 a->rx_compressed = b->rx_compressed;
936 a->tx_compressed = b->tx_compressed;
Jarod Wilson6e7333d2016-02-01 18:51:05 -0500937
938 a->rx_nohandler = b->rx_nohandler;
Jan Engelhardt10708f32010-03-11 09:57:29 +0000939}
940
Chris Wrightc02db8c2010-05-16 01:05:45 -0700941/* All VF info */
Greg Rose115c9b82012-02-21 16:54:48 -0500942static inline int rtnl_vfinfo_size(const struct net_device *dev,
943 u32 ext_filter_mask)
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000944{
Phil Sutter9af15c32017-01-18 14:04:39 +0100945 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
Chris Wrightc02db8c2010-05-16 01:05:45 -0700946 int num_vfs = dev_num_vf(dev->dev.parent);
Sabrina Dubroca7e75f742016-11-15 10:39:03 +0100947 size_t size = nla_total_size(0);
Scott Feldman045de012010-05-28 03:42:43 -0700948 size += num_vfs *
Sabrina Dubroca7e75f742016-11-15 10:39:03 +0100949 (nla_total_size(0) +
950 nla_total_size(sizeof(struct ifla_vf_mac)) +
Denis Kirjanov75345f882019-06-17 10:53:41 +0200951 nla_total_size(sizeof(struct ifla_vf_broadcast)) +
Sabrina Dubroca7e75f742016-11-15 10:39:03 +0100952 nla_total_size(sizeof(struct ifla_vf_vlan)) +
953 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
Moshe Shemesh79aab092016-09-22 12:11:15 +0300954 nla_total_size(MAX_VLAN_LIST_LEN *
955 sizeof(struct ifla_vf_vlan_info)) +
Sucheta Chakrabortyed616682014-05-22 09:59:05 -0400956 nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
Sabrina Dubroca7e75f742016-11-15 10:39:03 +0100957 nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
Jiri Benc945a3672014-08-08 16:44:32 +0200958 nla_total_size(sizeof(struct ifla_vf_rate)) +
Vlad Zolotarov01a3d792015-03-30 21:35:23 +0300959 nla_total_size(sizeof(struct ifla_vf_link_state)) +
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +0300960 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
Sabrina Dubroca7e75f742016-11-15 10:39:03 +0100961 nla_total_size(0) + /* nest IFLA_VF_STATS */
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +0300962 /* IFLA_VF_STATS_RX_PACKETS */
Nicolas Dichtel343a6d82016-04-25 10:25:14 +0200963 nla_total_size_64bit(sizeof(__u64)) +
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +0300964 /* IFLA_VF_STATS_TX_PACKETS */
Nicolas Dichtel343a6d82016-04-25 10:25:14 +0200965 nla_total_size_64bit(sizeof(__u64)) +
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +0300966 /* IFLA_VF_STATS_RX_BYTES */
Nicolas Dichtel343a6d82016-04-25 10:25:14 +0200967 nla_total_size_64bit(sizeof(__u64)) +
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +0300968 /* IFLA_VF_STATS_TX_BYTES */
Nicolas Dichtel343a6d82016-04-25 10:25:14 +0200969 nla_total_size_64bit(sizeof(__u64)) +
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +0300970 /* IFLA_VF_STATS_BROADCAST */
Nicolas Dichtel343a6d82016-04-25 10:25:14 +0200971 nla_total_size_64bit(sizeof(__u64)) +
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +0300972 /* IFLA_VF_STATS_MULTICAST */
Nicolas Dichtel343a6d82016-04-25 10:25:14 +0200973 nla_total_size_64bit(sizeof(__u64)) +
Eugenia Emantayevc5a9f6f2017-07-17 13:47:07 +0300974 /* IFLA_VF_STATS_RX_DROPPED */
975 nla_total_size_64bit(sizeof(__u64)) +
976 /* IFLA_VF_STATS_TX_DROPPED */
977 nla_total_size_64bit(sizeof(__u64)) +
Hiroshi Shimamotodd461d62015-08-28 06:57:55 +0000978 nla_total_size(sizeof(struct ifla_vf_trust)));
Chris Wrightc02db8c2010-05-16 01:05:45 -0700979 return size;
980 } else
Williams, Mitch Aebc08a62010-02-10 01:44:05 +0000981 return 0;
982}
983
David Gibsonc53864f2014-04-24 10:22:36 +1000984static size_t rtnl_port_size(const struct net_device *dev,
985 u32 ext_filter_mask)
Scott Feldman57b61082010-05-17 22:49:55 -0700986{
987 size_t port_size = nla_total_size(4) /* PORT_VF */
988 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
Scott Feldman57b61082010-05-17 22:49:55 -0700989 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
990 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
991 + nla_total_size(1) /* PROT_VDP_REQUEST */
992 + nla_total_size(2); /* PORT_VDP_RESPONSE */
993 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
994 size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
995 + port_size;
996 size_t port_self_size = nla_total_size(sizeof(struct nlattr))
997 + port_size;
998
David Gibsonc53864f2014-04-24 10:22:36 +1000999 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1000 !(ext_filter_mask & RTEXT_FILTER_VF))
Scott Feldman57b61082010-05-17 22:49:55 -07001001 return 0;
1002 if (dev_num_vf(dev->dev.parent))
1003 return port_self_size + vf_ports_size +
1004 vf_port_size * dev_num_vf(dev->dev.parent);
1005 else
1006 return port_self_size;
1007}
1008
David S. Millerb5cdae32017-04-18 15:36:58 -04001009static size_t rtnl_xdp_size(void)
Brenden Blancod1fdd912016-07-19 12:16:49 -07001010{
Sabrina Dubrocab3cfaa32016-11-15 11:16:35 +01001011 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
Martin KaFai Lau58038692017-06-15 17:29:09 -07001012 nla_total_size(1) + /* XDP_ATTACHED */
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001013 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
Jakub Kicinski4f91da22018-07-11 20:36:38 -07001014 nla_total_size(4); /* XDP_<mode>_PROG_ID */
Brenden Blancod1fdd912016-07-19 12:16:49 -07001015
David S. Millerb5cdae32017-04-18 15:36:58 -04001016 return xdp_size;
Brenden Blancod1fdd912016-07-19 12:16:49 -07001017}
1018
Jiri Pirko88f4fb02019-09-30 11:48:17 +02001019static size_t rtnl_prop_list_size(const struct net_device *dev)
1020{
1021 struct netdev_name_node *name_node;
1022 size_t size;
1023
1024 if (list_empty(&dev->name_node->list))
1025 return 0;
1026 size = nla_total_size(0);
1027 list_for_each_entry(name_node, &dev->name_node->list, list)
1028 size += nla_total_size(ALTIFNAMSIZ);
1029 return size;
1030}
1031
Roopa Prabhu829eb202020-07-31 17:34:01 -07001032static size_t rtnl_proto_down_size(const struct net_device *dev)
1033{
1034 size_t size = nla_total_size(1);
1035
1036 if (dev->proto_down_reason)
1037 size += nla_total_size(0) + nla_total_size(4);
1038
1039 return size;
1040}
1041
Jiri Pirkodca56c32022-11-02 17:02:11 +01001042static size_t rtnl_devlink_port_size(const struct net_device *dev)
1043{
1044 size_t size = nla_total_size(0); /* nest IFLA_DEVLINK_PORT */
1045
1046 if (dev->devlink_port)
1047 size += devlink_nl_port_handle_size(dev->devlink_port);
1048
1049 return size;
1050}
1051
Greg Rose115c9b82012-02-21 16:54:48 -05001052static noinline size_t if_nlmsg_size(const struct net_device *dev,
1053 u32 ext_filter_mask)
Thomas Graf339bf982006-11-10 14:10:15 -08001054{
1055 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1056 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001057 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
Thomas Graf339bf982006-11-10 14:10:15 -08001058 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
Nicolas Dichtel270cb4d2016-04-26 10:06:16 +02001059 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
Thomas Graf339bf982006-11-10 14:10:15 -08001060 + nla_total_size(sizeof(struct rtnl_link_stats))
David S. Miller35c58452016-04-19 19:49:29 -04001061 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
Thomas Graf339bf982006-11-10 14:10:15 -08001062 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1063 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1064 + nla_total_size(4) /* IFLA_TXQLEN */
1065 + nla_total_size(4) /* IFLA_WEIGHT */
1066 + nla_total_size(4) /* IFLA_MTU */
1067 + nla_total_size(4) /* IFLA_LINK */
1068 + nla_total_size(4) /* IFLA_MASTER */
Jiri Pirko9a572472012-12-27 23:49:39 +00001069 + nla_total_size(1) /* IFLA_CARRIER */
Ben Greearedbc0bb2012-03-29 12:51:30 +00001070 + nla_total_size(4) /* IFLA_PROMISCUITY */
Nicolas Dichtel7e6e1b52022-09-06 11:55:58 +02001071 + nla_total_size(4) /* IFLA_ALLMULTI */
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001072 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1073 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
Tobias Klauser69197562016-11-30 14:30:37 +01001074 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1075 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
Coco Lieac1b932022-01-05 02:48:38 -08001076 + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */
Xin Long9eefedd2023-01-28 10:58:38 -05001077 + nla_total_size(4) /* IFLA_GSO_IPV4_MAX_SIZE */
1078 + nla_total_size(4) /* IFLA_GRO_IPV4_MAX_SIZE */
Eric Dumazet89527be2022-05-13 11:33:56 -07001079 + nla_total_size(4) /* IFLA_TSO_MAX_SIZE */
1080 + nla_total_size(4) /* IFLA_TSO_MAX_SEGS */
Thomas Graf339bf982006-11-10 14:10:15 -08001081 + nla_total_size(1) /* IFLA_OPERSTATE */
Patrick McHardy38f7b872007-06-13 12:03:51 -07001082 + nla_total_size(1) /* IFLA_LINKMODE */
david decotigny2d3b4792014-03-29 09:48:35 -07001083 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
Nicolas Dichteld37512a2015-01-15 15:11:16 +01001084 + nla_total_size(4) /* IFLA_LINK_NETNSID */
Serhey Popovychdb833d42017-06-20 14:35:23 +03001085 + nla_total_size(4) /* IFLA_GROUP */
Greg Rose115c9b82012-02-21 16:54:48 -05001086 + nla_total_size(ext_filter_mask
1087 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1088 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
David Gibsonc53864f2014-04-24 10:22:36 +10001089 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
Thomas Graff8ff1822010-11-16 04:30:14 +00001090 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
Arad, Ronenb1974ed2015-10-19 09:23:28 -07001091 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
Jiri Pirko82f28412014-11-28 14:34:18 +01001092 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
Anuradha Karuppiah88d63782015-07-14 13:43:20 -07001093 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
Nicolas Dichtelc57c7a92016-03-31 18:10:31 +02001094 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
David S. Millerb5cdae32017-04-18 15:36:58 -04001095 + rtnl_xdp_size() /* IFLA_XDP */
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04001096 + nla_total_size(4) /* IFLA_EVENT */
Nicolas Dichtel6621dd22017-10-03 13:53:23 +02001097 + nla_total_size(4) /* IFLA_NEW_NETNSID */
Nicolas Dichtel38e01b32018-01-25 15:01:39 +01001098 + nla_total_size(4) /* IFLA_NEW_IFINDEX */
Roopa Prabhu829eb202020-07-31 17:34:01 -07001099 + rtnl_proto_down_size(dev) /* proto down */
Christian Brauner7e4a8d52018-09-04 21:53:53 +02001100 + nla_total_size(4) /* IFLA_TARGET_NETNSID */
David Decotignyb2d3bcf2018-01-18 09:59:13 -08001101 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1102 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
Stephen Hemminger3e7a50c2018-07-27 13:43:22 -07001103 + nla_total_size(4) /* IFLA_MIN_MTU */
1104 + nla_total_size(4) /* IFLA_MAX_MTU */
Jiri Pirko88f4fb02019-09-30 11:48:17 +02001105 + rtnl_prop_list_size(dev)
Michal Kubecekf74877a2019-12-11 10:58:14 +01001106 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
Jiri Pirkodca56c32022-11-02 17:02:11 +01001107 + rtnl_devlink_port_size(dev)
Jiri Benc79e1ad12017-11-02 17:04:38 -02001108 + 0;
Thomas Graf339bf982006-11-10 14:10:15 -08001109}
1110
Scott Feldman57b61082010-05-17 22:49:55 -07001111static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1112{
1113 struct nlattr *vf_ports;
1114 struct nlattr *vf_port;
1115 int vf;
1116 int err;
1117
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001118 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
Scott Feldman57b61082010-05-17 22:49:55 -07001119 if (!vf_ports)
1120 return -EMSGSIZE;
1121
1122 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001123 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
Scott Feldman8ca94182010-05-28 03:42:18 -07001124 if (!vf_port)
1125 goto nla_put_failure;
David S. Millera6574342012-04-01 20:12:00 -04001126 if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1127 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -07001128 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
Scott Feldman8ca94182010-05-28 03:42:18 -07001129 if (err == -EMSGSIZE)
1130 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -07001131 if (err) {
Scott Feldman57b61082010-05-17 22:49:55 -07001132 nla_nest_cancel(skb, vf_port);
1133 continue;
1134 }
1135 nla_nest_end(skb, vf_port);
1136 }
1137
1138 nla_nest_end(skb, vf_ports);
1139
1140 return 0;
Scott Feldman8ca94182010-05-28 03:42:18 -07001141
1142nla_put_failure:
1143 nla_nest_cancel(skb, vf_ports);
1144 return -EMSGSIZE;
Scott Feldman57b61082010-05-17 22:49:55 -07001145}
1146
1147static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1148{
1149 struct nlattr *port_self;
1150 int err;
1151
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001152 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
Scott Feldman57b61082010-05-17 22:49:55 -07001153 if (!port_self)
1154 return -EMSGSIZE;
1155
1156 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1157 if (err) {
1158 nla_nest_cancel(skb, port_self);
Scott Feldman8ca94182010-05-28 03:42:18 -07001159 return (err == -EMSGSIZE) ? err : 0;
Scott Feldman57b61082010-05-17 22:49:55 -07001160 }
1161
1162 nla_nest_end(skb, port_self);
1163
1164 return 0;
1165}
1166
David Gibsonc53864f2014-04-24 10:22:36 +10001167static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1168 u32 ext_filter_mask)
Scott Feldman57b61082010-05-17 22:49:55 -07001169{
1170 int err;
1171
David Gibsonc53864f2014-04-24 10:22:36 +10001172 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1173 !(ext_filter_mask & RTEXT_FILTER_VF))
Scott Feldman57b61082010-05-17 22:49:55 -07001174 return 0;
1175
1176 err = rtnl_port_self_fill(skb, dev);
1177 if (err)
1178 return err;
1179
1180 if (dev_num_vf(dev->dev.parent)) {
1181 err = rtnl_vf_ports_fill(skb, dev);
1182 if (err)
1183 return err;
1184 }
1185
1186 return 0;
1187}
1188
Jiri Pirko66cae9e2013-07-29 18:16:50 +02001189static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1190{
1191 int err;
Jiri Pirko02637fc2014-11-28 14:34:16 +01001192 struct netdev_phys_item_id ppid;
Jiri Pirko66cae9e2013-07-29 18:16:50 +02001193
1194 err = dev_get_phys_port_id(dev, &ppid);
1195 if (err) {
1196 if (err == -EOPNOTSUPP)
1197 return 0;
1198 return err;
1199 }
1200
1201 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1202 return -EMSGSIZE;
1203
1204 return 0;
1205}
1206
David Aherndb24a902015-03-17 20:23:15 -06001207static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1208{
1209 char name[IFNAMSIZ];
1210 int err;
1211
1212 err = dev_get_phys_port_name(dev, name, sizeof(name));
1213 if (err) {
1214 if (err == -EOPNOTSUPP)
1215 return 0;
1216 return err;
1217 }
1218
Michal Schmidt77ef0332017-05-04 16:48:58 +02001219 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
David Aherndb24a902015-03-17 20:23:15 -06001220 return -EMSGSIZE;
1221
1222 return 0;
1223}
1224
Jiri Pirko82f28412014-11-28 14:34:18 +01001225static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1226{
Florian Fainellibccb3022019-02-06 09:45:46 -08001227 struct netdev_phys_item_id ppid = { };
Jiri Pirko82f28412014-11-28 14:34:18 +01001228 int err;
Jiri Pirko82f28412014-11-28 14:34:18 +01001229
Florian Fainellibccb3022019-02-06 09:45:46 -08001230 err = dev_get_port_parent_id(dev, &ppid, false);
Jiri Pirko82f28412014-11-28 14:34:18 +01001231 if (err) {
1232 if (err == -EOPNOTSUPP)
1233 return 0;
1234 return err;
1235 }
1236
Florian Fainellibccb3022019-02-06 09:45:46 -08001237 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
Jiri Pirko82f28412014-11-28 14:34:18 +01001238 return -EMSGSIZE;
1239
1240 return 0;
1241}
1242
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001243static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1244 struct net_device *dev)
1245{
Roopa Prabhu550bce52016-04-15 20:36:25 -07001246 struct rtnl_link_stats64 *sp;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001247 struct nlattr *attr;
1248
Nicolas Dichtel58414d32016-04-21 18:58:25 +02001249 attr = nla_reserve_64bit(skb, IFLA_STATS64,
1250 sizeof(struct rtnl_link_stats64), IFLA_PAD);
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001251 if (!attr)
1252 return -EMSGSIZE;
1253
Roopa Prabhu550bce52016-04-15 20:36:25 -07001254 sp = nla_data(attr);
1255 dev_get_stats(dev, sp);
1256
1257 attr = nla_reserve(skb, IFLA_STATS,
1258 sizeof(struct rtnl_link_stats));
1259 if (!attr)
1260 return -EMSGSIZE;
1261
1262 copy_rtnl_link_stats(nla_data(attr), sp);
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001263
1264 return 0;
1265}
1266
1267static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1268 struct net_device *dev,
1269 int vfs_num,
1270 struct nlattr *vfinfo)
1271{
1272 struct ifla_vf_rss_query_en vf_rss_query_en;
Moshe Shemesh79aab092016-09-22 12:11:15 +03001273 struct nlattr *vf, *vfstats, *vfvlanlist;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001274 struct ifla_vf_link_state vf_linkstate;
Moshe Shemesh79aab092016-09-22 12:11:15 +03001275 struct ifla_vf_vlan_info vf_vlan_info;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001276 struct ifla_vf_spoofchk vf_spoofchk;
1277 struct ifla_vf_tx_rate vf_tx_rate;
1278 struct ifla_vf_stats vf_stats;
1279 struct ifla_vf_trust vf_trust;
1280 struct ifla_vf_vlan vf_vlan;
1281 struct ifla_vf_rate vf_rate;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001282 struct ifla_vf_mac vf_mac;
Denis Kirjanov75345f882019-06-17 10:53:41 +02001283 struct ifla_vf_broadcast vf_broadcast;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001284 struct ifla_vf_info ivi;
Danit Goldberg30aad412019-11-06 15:30:07 +02001285 struct ifla_vf_guid node_guid;
1286 struct ifla_vf_guid port_guid;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001287
Mintz, Yuval0eed9cf2017-06-07 21:00:33 +03001288 memset(&ivi, 0, sizeof(ivi));
1289
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001290 /* Not all SR-IOV capable drivers support the
1291 * spoofcheck and "RSS query enable" query. Preset to
1292 * -1 so the user space tool can detect that the driver
1293 * didn't report anything.
1294 */
1295 ivi.spoofchk = -1;
1296 ivi.rss_query_en = -1;
1297 ivi.trusted = -1;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001298 /* The default value for VF link state is "auto"
1299 * IFLA_VF_LINK_STATE_AUTO which equals zero
1300 */
1301 ivi.linkstate = 0;
Moshe Shemesh79aab092016-09-22 12:11:15 +03001302 /* VLAN Protocol by default is 802.1Q */
1303 ivi.vlan_proto = htons(ETH_P_8021Q);
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001304 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1305 return 0;
1306
Dan Carpenter775f4f02016-10-13 11:45:28 +03001307 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
Leon Romanovsky9fbf0822020-01-30 14:59:49 +02001308 memset(&node_guid, 0, sizeof(node_guid));
1309 memset(&port_guid, 0, sizeof(port_guid));
Dan Carpenter775f4f02016-10-13 11:45:28 +03001310
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001311 vf_mac.vf =
1312 vf_vlan.vf =
Moshe Shemesh79aab092016-09-22 12:11:15 +03001313 vf_vlan_info.vf =
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001314 vf_rate.vf =
1315 vf_tx_rate.vf =
1316 vf_spoofchk.vf =
1317 vf_linkstate.vf =
1318 vf_rss_query_en.vf =
Danit Goldberg9aed6ae2019-12-03 17:43:36 +02001319 vf_trust.vf =
1320 node_guid.vf =
1321 port_guid.vf = ivi.vf;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001322
1323 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
Denis Kirjanov75345f882019-06-17 10:53:41 +02001324 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001325 vf_vlan.vlan = ivi.vlan;
1326 vf_vlan.qos = ivi.qos;
Moshe Shemesh79aab092016-09-22 12:11:15 +03001327 vf_vlan_info.vlan = ivi.vlan;
1328 vf_vlan_info.qos = ivi.qos;
1329 vf_vlan_info.vlan_proto = ivi.vlan_proto;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001330 vf_tx_rate.rate = ivi.max_tx_rate;
1331 vf_rate.min_tx_rate = ivi.min_tx_rate;
1332 vf_rate.max_tx_rate = ivi.max_tx_rate;
1333 vf_spoofchk.setting = ivi.spoofchk;
1334 vf_linkstate.link_state = ivi.linkstate;
1335 vf_rss_query_en.setting = ivi.rss_query_en;
1336 vf_trust.setting = ivi.trusted;
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001337 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
Moshe Shemesh79aab092016-09-22 12:11:15 +03001338 if (!vf)
1339 goto nla_put_vfinfo_failure;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001340 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
Denis Kirjanov75345f882019-06-17 10:53:41 +02001341 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001342 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1343 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1344 &vf_rate) ||
1345 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1346 &vf_tx_rate) ||
1347 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1348 &vf_spoofchk) ||
1349 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1350 &vf_linkstate) ||
1351 nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1352 sizeof(vf_rss_query_en),
1353 &vf_rss_query_en) ||
1354 nla_put(skb, IFLA_VF_TRUST,
1355 sizeof(vf_trust), &vf_trust))
Moshe Shemesh79aab092016-09-22 12:11:15 +03001356 goto nla_put_vf_failure;
Danit Goldberg30aad412019-11-06 15:30:07 +02001357
Danit Goldberg30aad412019-11-06 15:30:07 +02001358 if (dev->netdev_ops->ndo_get_vf_guid &&
1359 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1360 &port_guid)) {
1361 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1362 &node_guid) ||
1363 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1364 &port_guid))
1365 goto nla_put_vf_failure;
1366 }
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001367 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
Moshe Shemesh79aab092016-09-22 12:11:15 +03001368 if (!vfvlanlist)
1369 goto nla_put_vf_failure;
1370 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1371 &vf_vlan_info)) {
1372 nla_nest_cancel(skb, vfvlanlist);
1373 goto nla_put_vf_failure;
1374 }
1375 nla_nest_end(skb, vfvlanlist);
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001376 memset(&vf_stats, 0, sizeof(vf_stats));
1377 if (dev->netdev_ops->ndo_get_vf_stats)
1378 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1379 &vf_stats);
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001380 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
Moshe Shemesh79aab092016-09-22 12:11:15 +03001381 if (!vfstats)
1382 goto nla_put_vf_failure;
Nicolas Dichtel343a6d82016-04-25 10:25:14 +02001383 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1384 vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1385 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1386 vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1387 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1388 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1389 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1390 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1391 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1392 vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1393 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
Eugenia Emantayevc5a9f6f2017-07-17 13:47:07 +03001394 vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1395 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1396 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1397 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1398 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
Moshe Shemesh79aab092016-09-22 12:11:15 +03001399 nla_nest_cancel(skb, vfstats);
1400 goto nla_put_vf_failure;
1401 }
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001402 nla_nest_end(skb, vfstats);
1403 nla_nest_end(skb, vf);
1404 return 0;
Moshe Shemesh79aab092016-09-22 12:11:15 +03001405
1406nla_put_vf_failure:
1407 nla_nest_cancel(skb, vf);
1408nla_put_vfinfo_failure:
1409 nla_nest_cancel(skb, vfinfo);
1410 return -EMSGSIZE;
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001411}
1412
Florian Westphal250fc3d2017-09-26 13:58:41 +02001413static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1414 struct net_device *dev,
1415 u32 ext_filter_mask)
1416{
1417 struct nlattr *vfinfo;
1418 int i, num_vfs;
1419
1420 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1421 return 0;
1422
1423 num_vfs = dev_num_vf(dev->dev.parent);
1424 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1425 return -EMSGSIZE;
1426
1427 if (!dev->netdev_ops->ndo_get_vf_config)
1428 return 0;
1429
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001430 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
Florian Westphal250fc3d2017-09-26 13:58:41 +02001431 if (!vfinfo)
1432 return -EMSGSIZE;
1433
1434 for (i = 0; i < num_vfs; i++) {
1435 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1436 return -EMSGSIZE;
1437 }
1438
1439 nla_nest_end(skb, vfinfo);
1440 return 0;
1441}
1442
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001443static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1444{
Kangjie Lu5f8e4472016-05-03 16:46:24 -04001445 struct rtnl_link_ifmap map;
1446
1447 memset(&map, 0, sizeof(map));
1448 map.mem_start = dev->mem_start;
1449 map.mem_end = dev->mem_end;
1450 map.base_addr = dev->base_addr;
1451 map.irq = dev->irq;
1452 map.dma = dev->dma;
1453 map.port = dev->if_port;
1454
Nicolas Dichtel270cb4d2016-04-26 10:06:16 +02001455 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001456 return -EMSGSIZE;
1457
1458 return 0;
1459}
1460
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001461static u32 rtnl_xdp_prog_skb(struct net_device *dev)
Daniel Borkmannd67b9cd2017-05-12 01:04:46 +02001462{
Martin KaFai Lau58038692017-06-15 17:29:09 -07001463 const struct bpf_prog *generic_xdp_prog;
Daniel Borkmannd67b9cd2017-05-12 01:04:46 +02001464
1465 ASSERT_RTNL();
1466
Martin KaFai Lau58038692017-06-15 17:29:09 -07001467 generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001468 if (!generic_xdp_prog)
1469 return 0;
1470 return generic_xdp_prog->aux->id;
1471}
Daniel Borkmannd67b9cd2017-05-12 01:04:46 +02001472
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001473static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1474{
Andrii Nakryiko7f0a8382020-07-21 23:45:55 -07001475 return dev_xdp_prog_id(dev, XDP_MODE_DRV);
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001476}
Jakub Kicinski118b4aa2017-12-01 15:08:55 -08001477
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001478static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1479{
Andrii Nakryiko7f0a8382020-07-21 23:45:55 -07001480 return dev_xdp_prog_id(dev, XDP_MODE_HW);
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001481}
1482
1483static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1484 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1485 u32 (*get_prog_id)(struct net_device *dev))
1486{
1487 u32 curr_id;
1488 int err;
1489
1490 curr_id = get_prog_id(dev);
1491 if (!curr_id)
1492 return 0;
1493
1494 *prog_id = curr_id;
1495 err = nla_put_u32(skb, attr, curr_id);
1496 if (err)
1497 return err;
1498
1499 if (*mode != XDP_ATTACHED_NONE)
1500 *mode = XDP_ATTACHED_MULTI;
1501 else
1502 *mode = tgt_mode;
1503
1504 return 0;
Daniel Borkmannd67b9cd2017-05-12 01:04:46 +02001505}
1506
Brenden Blancod1fdd912016-07-19 12:16:49 -07001507static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1508{
Brenden Blancod1fdd912016-07-19 12:16:49 -07001509 struct nlattr *xdp;
Martin KaFai Lau58038692017-06-15 17:29:09 -07001510 u32 prog_id;
Brenden Blancod1fdd912016-07-19 12:16:49 -07001511 int err;
Jakub Kicinski4f91da22018-07-11 20:36:38 -07001512 u8 mode;
Brenden Blancod1fdd912016-07-19 12:16:49 -07001513
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001514 xdp = nla_nest_start_noflag(skb, IFLA_XDP);
Brenden Blancod1fdd912016-07-19 12:16:49 -07001515 if (!xdp)
1516 return -EMSGSIZE;
David S. Millerb5cdae32017-04-18 15:36:58 -04001517
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001518 prog_id = 0;
1519 mode = XDP_ATTACHED_NONE;
Jakub Kicinski202aabe2018-07-16 19:08:50 -07001520 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1521 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1522 if (err)
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001523 goto err_cancel;
Jakub Kicinski202aabe2018-07-16 19:08:50 -07001524 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1525 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1526 if (err)
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001527 goto err_cancel;
Jakub Kicinski202aabe2018-07-16 19:08:50 -07001528 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1529 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1530 if (err)
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001531 goto err_cancel;
1532
Jakub Kicinski4f91da22018-07-11 20:36:38 -07001533 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
Brenden Blancod1fdd912016-07-19 12:16:49 -07001534 if (err)
1535 goto err_cancel;
1536
Jakub Kicinskia25717d2018-07-11 20:36:41 -07001537 if (prog_id && mode != XDP_ATTACHED_MULTI) {
Martin KaFai Lau58038692017-06-15 17:29:09 -07001538 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1539 if (err)
1540 goto err_cancel;
1541 }
1542
Brenden Blancod1fdd912016-07-19 12:16:49 -07001543 nla_nest_end(skb, xdp);
1544 return 0;
1545
1546err_cancel:
1547 nla_nest_cancel(skb, xdp);
1548 return err;
1549}
1550
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04001551static u32 rtnl_get_event(unsigned long event)
1552{
1553 u32 rtnl_event_type = IFLA_EVENT_NONE;
1554
1555 switch (event) {
1556 case NETDEV_REBOOT:
1557 rtnl_event_type = IFLA_EVENT_REBOOT;
1558 break;
1559 case NETDEV_FEAT_CHANGE:
1560 rtnl_event_type = IFLA_EVENT_FEATURES;
1561 break;
1562 case NETDEV_BONDING_FAILOVER:
1563 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1564 break;
1565 case NETDEV_NOTIFY_PEERS:
1566 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1567 break;
1568 case NETDEV_RESEND_IGMP:
1569 rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1570 break;
1571 case NETDEV_CHANGEINFODATA:
1572 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1573 break;
1574 default:
1575 break;
1576 }
1577
1578 return rtnl_event_type;
1579}
1580
Florian Westphal79110a02017-09-26 13:58:40 +02001581static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1582{
1583 const struct net_device *upper_dev;
1584 int ret = 0;
1585
1586 rcu_read_lock();
1587
1588 upper_dev = netdev_master_upper_dev_get_rcu(dev);
1589 if (upper_dev)
1590 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1591
1592 rcu_read_unlock();
1593 return ret;
1594}
1595
Sabrina Dubrocafeadc4b2019-05-14 15:12:19 +02001596static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1597 bool force)
Florian Westphal79110a02017-09-26 13:58:40 +02001598{
1599 int ifindex = dev_get_iflink(dev);
1600
Sabrina Dubrocafeadc4b2019-05-14 15:12:19 +02001601 if (force || dev->ifindex != ifindex)
1602 return nla_put_u32(skb, IFLA_LINK, ifindex);
Florian Westphal79110a02017-09-26 13:58:40 +02001603
Sabrina Dubrocafeadc4b2019-05-14 15:12:19 +02001604 return 0;
Florian Westphal79110a02017-09-26 13:58:40 +02001605}
1606
Florian Westphal6c557002017-10-02 23:50:05 +02001607static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1608 struct net_device *dev)
1609{
1610 char buf[IFALIASZ];
1611 int ret;
1612
1613 ret = dev_get_alias(dev, buf, sizeof(buf));
1614 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1615}
1616
Florian Westphalb1e66b92017-09-26 13:58:42 +02001617static int rtnl_fill_link_netnsid(struct sk_buff *skb,
Jiri Benc79e1ad12017-11-02 17:04:38 -02001618 const struct net_device *dev,
Guillaume Naultd4e4fdf2019-10-23 18:39:04 +02001619 struct net *src_net, gfp_t gfp)
Florian Westphalb1e66b92017-09-26 13:58:42 +02001620{
Sabrina Dubrocafeadc4b2019-05-14 15:12:19 +02001621 bool put_iflink = false;
1622
Florian Westphalb1e66b92017-09-26 13:58:42 +02001623 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1624 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1625
1626 if (!net_eq(dev_net(dev), link_net)) {
Guillaume Naultd4e4fdf2019-10-23 18:39:04 +02001627 int id = peernet2id_alloc(src_net, link_net, gfp);
Florian Westphalb1e66b92017-09-26 13:58:42 +02001628
1629 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1630 return -EMSGSIZE;
Sabrina Dubrocafeadc4b2019-05-14 15:12:19 +02001631
1632 put_iflink = true;
Florian Westphalb1e66b92017-09-26 13:58:42 +02001633 }
1634 }
1635
Sabrina Dubrocafeadc4b2019-05-14 15:12:19 +02001636 return nla_put_iflink(skb, dev, put_iflink);
Florian Westphalb1e66b92017-09-26 13:58:42 +02001637}
1638
Florian Westphal070cbf5b2017-10-16 15:44:35 +02001639static int rtnl_fill_link_af(struct sk_buff *skb,
1640 const struct net_device *dev,
1641 u32 ext_filter_mask)
1642{
1643 const struct rtnl_af_ops *af_ops;
1644 struct nlattr *af_spec;
1645
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001646 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
Florian Westphal070cbf5b2017-10-16 15:44:35 +02001647 if (!af_spec)
1648 return -EMSGSIZE;
1649
Florian Westphal5fa85a02017-10-16 15:44:36 +02001650 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
Florian Westphal070cbf5b2017-10-16 15:44:35 +02001651 struct nlattr *af;
1652 int err;
1653
1654 if (!af_ops->fill_link_af)
1655 continue;
1656
Michal Kubecekae0be8d2019-04-26 11:13:06 +02001657 af = nla_nest_start_noflag(skb, af_ops->family);
Florian Westphal070cbf5b2017-10-16 15:44:35 +02001658 if (!af)
1659 return -EMSGSIZE;
1660
1661 err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1662 /*
1663 * Caller may return ENODATA to indicate that there
1664 * was no data to be dumped. This is not an error, it
1665 * means we should trim the attribute header and
1666 * continue.
1667 */
1668 if (err == -ENODATA)
1669 nla_nest_cancel(skb, af);
1670 else if (err < 0)
1671 return -EMSGSIZE;
1672
1673 nla_nest_end(skb, af);
1674 }
1675
1676 nla_nest_end(skb, af_spec);
1677 return 0;
1678}
1679
Jiri Pirko88f4fb02019-09-30 11:48:17 +02001680static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1681 const struct net_device *dev)
1682{
1683 struct netdev_name_node *name_node;
1684 int count = 0;
1685
1686 list_for_each_entry(name_node, &dev->name_node->list, list) {
1687 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1688 return -EMSGSIZE;
1689 count++;
1690 }
1691 return count;
1692}
1693
1694static int rtnl_fill_prop_list(struct sk_buff *skb,
1695 const struct net_device *dev)
1696{
1697 struct nlattr *prop_list;
1698 int ret;
1699
1700 prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1701 if (!prop_list)
1702 return -EMSGSIZE;
1703
1704 ret = rtnl_fill_alt_ifnames(skb, dev);
1705 if (ret <= 0)
1706 goto nest_cancel;
1707
1708 nla_nest_end(skb, prop_list);
1709 return 0;
1710
1711nest_cancel:
1712 nla_nest_cancel(skb, prop_list);
1713 return ret;
1714}
1715
Roopa Prabhu829eb202020-07-31 17:34:01 -07001716static int rtnl_fill_proto_down(struct sk_buff *skb,
1717 const struct net_device *dev)
1718{
1719 struct nlattr *pr;
1720 u32 preason;
1721
1722 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1723 goto nla_put_failure;
1724
1725 preason = dev->proto_down_reason;
1726 if (!preason)
1727 return 0;
1728
1729 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1730 if (!pr)
1731 return -EMSGSIZE;
1732
1733 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1734 nla_nest_cancel(skb, pr);
1735 goto nla_put_failure;
1736 }
1737
1738 nla_nest_end(skb, pr);
1739 return 0;
1740
1741nla_put_failure:
1742 return -EMSGSIZE;
1743}
1744
Jiri Pirkodca56c32022-11-02 17:02:11 +01001745static int rtnl_fill_devlink_port(struct sk_buff *skb,
1746 const struct net_device *dev)
1747{
1748 struct nlattr *devlink_port_nest;
1749 int ret;
1750
1751 devlink_port_nest = nla_nest_start(skb, IFLA_DEVLINK_PORT);
1752 if (!devlink_port_nest)
1753 return -EMSGSIZE;
1754
1755 if (dev->devlink_port) {
1756 ret = devlink_nl_port_handle_fill(skb, dev->devlink_port);
1757 if (ret < 0)
1758 goto nest_cancel;
1759 }
1760
1761 nla_nest_end(skb, devlink_port_nest);
1762 return 0;
1763
1764nest_cancel:
1765 nla_nest_cancel(skb, devlink_port_nest);
1766 return ret;
1767}
1768
Jiri Benc79e1ad12017-11-02 17:04:38 -02001769static int rtnl_fill_ifinfo(struct sk_buff *skb,
1770 struct net_device *dev, struct net *src_net,
Patrick McHardy575c3e22007-05-22 17:00:49 -07001771 int type, u32 pid, u32 seq, u32 change,
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04001772 unsigned int flags, u32 ext_filter_mask,
Nicolas Dichtel38e01b32018-01-25 15:01:39 +01001773 u32 event, int *new_nsid, int new_ifindex,
Guillaume Naultd4e4fdf2019-10-23 18:39:04 +02001774 int tgt_netnsid, gfp_t gfp)
Thomas Grafb60c5112006-08-04 23:05:34 -07001775{
1776 struct ifinfomsg *ifm;
1777 struct nlmsghdr *nlh;
Eric Dumazet5891cd52022-02-11 12:06:23 -08001778 struct Qdisc *qdisc;
Thomas Grafb60c5112006-08-04 23:05:34 -07001779
Eric Dumazet2907c352011-05-25 07:34:04 +00001780 ASSERT_RTNL();
Thomas Grafb60c5112006-08-04 23:05:34 -07001781 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1782 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -08001783 return -EMSGSIZE;
Thomas Grafb60c5112006-08-04 23:05:34 -07001784
1785 ifm = nlmsg_data(nlh);
1786 ifm->ifi_family = AF_UNSPEC;
1787 ifm->__ifi_pad = 0;
1788 ifm->ifi_type = dev->type;
1789 ifm->ifi_index = dev->ifindex;
1790 ifm->ifi_flags = dev_get_flags(dev);
1791 ifm->ifi_change = change;
1792
Christian Brauner7e4a8d52018-09-04 21:53:53 +02001793 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
Jiri Benc79e1ad12017-11-02 17:04:38 -02001794 goto nla_put_failure;
1795
Eric Dumazet5891cd52022-02-11 12:06:23 -08001796 qdisc = rtnl_dereference(dev->qdisc);
David S. Millera6574342012-04-01 20:12:00 -04001797 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1798 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1799 nla_put_u8(skb, IFLA_OPERSTATE,
1800 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1801 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1802 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
Stephen Hemminger3e7a50c2018-07-27 13:43:22 -07001803 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1804 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
David S. Millera6574342012-04-01 20:12:00 -04001805 nla_put_u32(skb, IFLA_GROUP, dev->group) ||
Ben Greearedbc0bb2012-03-29 12:51:30 +00001806 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
Nicolas Dichtel7e6e1b52022-09-06 11:55:58 +02001807 nla_put_u32(skb, IFLA_ALLMULTI, dev->allmulti) ||
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001808 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
Eric Dumazetc70ce022016-03-21 09:55:10 -07001809 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1810 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
Coco Lieac1b932022-01-05 02:48:38 -08001811 nla_put_u32(skb, IFLA_GRO_MAX_SIZE, dev->gro_max_size) ||
Xin Long9eefedd2023-01-28 10:58:38 -05001812 nla_put_u32(skb, IFLA_GSO_IPV4_MAX_SIZE, dev->gso_ipv4_max_size) ||
1813 nla_put_u32(skb, IFLA_GRO_IPV4_MAX_SIZE, dev->gro_ipv4_max_size) ||
Eric Dumazet89527be2022-05-13 11:33:56 -07001814 nla_put_u32(skb, IFLA_TSO_MAX_SIZE, dev->tso_max_size) ||
1815 nla_put_u32(skb, IFLA_TSO_MAX_SEGS, dev->tso_max_segs) ||
Mark A. Greer1d69c2b2012-07-20 13:35:13 +00001816#ifdef CONFIG_RPS
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00001817 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
Mark A. Greer1d69c2b2012-07-20 13:35:13 +00001818#endif
Florian Westphal79110a02017-09-26 13:58:40 +02001819 put_master_ifindex(skb, dev) ||
Jiri Pirko9a572472012-12-27 23:49:39 +00001820 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
Eric Dumazet5891cd52022-02-11 12:06:23 -08001821 (qdisc &&
1822 nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) ||
Florian Westphal6c557002017-10-02 23:50:05 +02001823 nla_put_ifalias(skb, dev) ||
david decotigny2d3b4792014-03-29 09:48:35 -07001824 nla_put_u32(skb, IFLA_CARRIER_CHANGES,
David Decotignyb2d3bcf2018-01-18 09:59:13 -08001825 atomic_read(&dev->carrier_up_count) +
1826 atomic_read(&dev->carrier_down_count)) ||
David Decotignyb2d3bcf2018-01-18 09:59:13 -08001827 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1828 atomic_read(&dev->carrier_up_count)) ||
1829 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1830 atomic_read(&dev->carrier_down_count)))
David S. Millera6574342012-04-01 20:12:00 -04001831 goto nla_put_failure;
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001832
Roopa Prabhu829eb202020-07-31 17:34:01 -07001833 if (rtnl_fill_proto_down(skb, dev))
1834 goto nla_put_failure;
1835
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04001836 if (event != IFLA_EVENT_NONE) {
1837 if (nla_put_u32(skb, IFLA_EVENT, event))
1838 goto nla_put_failure;
1839 }
1840
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001841 if (rtnl_fill_link_ifmap(skb, dev))
1842 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843
1844 if (dev->addr_len) {
David S. Millera6574342012-04-01 20:12:00 -04001845 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1846 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1847 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 }
1849
Jiri Pirko66cae9e2013-07-29 18:16:50 +02001850 if (rtnl_phys_port_id_fill(skb, dev))
1851 goto nla_put_failure;
1852
David Aherndb24a902015-03-17 20:23:15 -06001853 if (rtnl_phys_port_name_fill(skb, dev))
1854 goto nla_put_failure;
1855
Jiri Pirko82f28412014-11-28 14:34:18 +01001856 if (rtnl_phys_switch_id_fill(skb, dev))
1857 goto nla_put_failure;
1858
Hannes Frederic Sowab22b9412015-11-17 14:16:52 +01001859 if (rtnl_fill_stats(skb, dev))
Pavel Emelyanov96e74082008-05-21 14:12:46 -07001860 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861
Florian Westphal250fc3d2017-09-26 13:58:41 +02001862 if (rtnl_fill_vf(skb, dev, ext_filter_mask))
David S. Millera6574342012-04-01 20:12:00 -04001863 goto nla_put_failure;
Scott Feldman57b61082010-05-17 22:49:55 -07001864
David Gibsonc53864f2014-04-24 10:22:36 +10001865 if (rtnl_port_fill(skb, dev, ext_filter_mask))
Scott Feldman57b61082010-05-17 22:49:55 -07001866 goto nla_put_failure;
1867
Brenden Blancod1fdd912016-07-19 12:16:49 -07001868 if (rtnl_xdp_fill(skb, dev))
1869 goto nla_put_failure;
1870
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01001871 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
Patrick McHardy38f7b872007-06-13 12:03:51 -07001872 if (rtnl_link_fill(skb, dev) < 0)
1873 goto nla_put_failure;
1874 }
1875
Guillaume Naultd4e4fdf2019-10-23 18:39:04 +02001876 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
Florian Westphalb1e66b92017-09-26 13:58:42 +02001877 goto nla_put_failure;
Nicolas Dichteld37512a2015-01-15 15:11:16 +01001878
Nicolas Dichtel6621dd22017-10-03 13:53:23 +02001879 if (new_nsid &&
1880 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1881 goto nla_put_failure;
Nicolas Dichtel38e01b32018-01-25 15:01:39 +01001882 if (new_ifindex &&
1883 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1884 goto nla_put_failure;
1885
Michal Kubecekf74877a2019-12-11 10:58:14 +01001886 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1887 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1888 goto nla_put_failure;
Nicolas Dichtel6621dd22017-10-03 13:53:23 +02001889
Florian Westphal5fa85a02017-10-16 15:44:36 +02001890 rcu_read_lock();
Florian Westphal070cbf5b2017-10-16 15:44:35 +02001891 if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
Florian Westphal5fa85a02017-10-16 15:44:36 +02001892 goto nla_put_failure_rcu;
1893 rcu_read_unlock();
Thomas Graff8ff1822010-11-16 04:30:14 +00001894
Jiri Pirko88f4fb02019-09-30 11:48:17 +02001895 if (rtnl_fill_prop_list(skb, dev))
1896 goto nla_put_failure;
1897
Johannes Berg00e77ed2021-06-12 10:20:55 +02001898 if (dev->dev.parent &&
1899 nla_put_string(skb, IFLA_PARENT_DEV_NAME,
1900 dev_name(dev->dev.parent)))
1901 goto nla_put_failure;
1902
1903 if (dev->dev.parent && dev->dev.parent->bus &&
1904 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME,
1905 dev->dev.parent->bus->name))
1906 goto nla_put_failure;
1907
Jiri Pirkodca56c32022-11-02 17:02:11 +01001908 if (rtnl_fill_devlink_port(skb, dev))
1909 goto nla_put_failure;
1910
Johannes Berg053c0952015-01-16 22:09:00 +01001911 nlmsg_end(skb, nlh);
1912 return 0;
Thomas Grafb60c5112006-08-04 23:05:34 -07001913
Florian Westphal5fa85a02017-10-16 15:44:36 +02001914nla_put_failure_rcu:
1915 rcu_read_unlock();
Thomas Grafb60c5112006-08-04 23:05:34 -07001916nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -08001917 nlmsg_cancel(skb, nlh);
1918 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919}
1920
Jiri Pirkof7b12602014-02-18 20:53:18 +01001921static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1922 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1923 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1924 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1925 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1926 [IFLA_MTU] = { .type = NLA_U32 },
1927 [IFLA_LINK] = { .type = NLA_U32 },
1928 [IFLA_MASTER] = { .type = NLA_U32 },
1929 [IFLA_CARRIER] = { .type = NLA_U8 },
1930 [IFLA_TXQLEN] = { .type = NLA_U32 },
1931 [IFLA_WEIGHT] = { .type = NLA_U32 },
1932 [IFLA_OPERSTATE] = { .type = NLA_U8 },
1933 [IFLA_LINKMODE] = { .type = NLA_U8 },
1934 [IFLA_LINKINFO] = { .type = NLA_NESTED },
1935 [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1936 [IFLA_NET_NS_FD] = { .type = NLA_U32 },
Nicolas Dichtel2459b4c2017-10-11 16:24:48 +02001937 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1938 * allow 0-length string (needed to remove an alias).
1939 */
1940 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
Jiri Pirkof7b12602014-02-18 20:53:18 +01001941 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1942 [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1943 [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1944 [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1945 [IFLA_EXT_MASK] = { .type = NLA_U32 },
1946 [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1947 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1948 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
Stephen Hemminger46e6b992017-12-07 15:40:19 -08001949 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1950 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
Jiri Pirko02637fc2014-11-28 14:34:16 +01001951 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
david decotigny2d3b4792014-03-29 09:48:35 -07001952 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
Jiri Pirko82f28412014-11-28 14:34:18 +01001953 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
Nicolas Dichtel317f4812015-01-15 15:11:18 +01001954 [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
Anuradha Karuppiah88d63782015-07-14 13:43:20 -07001955 [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
Brenden Blancod1fdd912016-07-19 12:16:49 -07001956 [IFLA_XDP] = { .type = NLA_NESTED },
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04001957 [IFLA_EVENT] = { .type = NLA_U32 },
Serhey Popovychdb833d42017-06-20 14:35:23 +03001958 [IFLA_GROUP] = { .type = NLA_U32 },
Christian Brauner7e4a8d52018-09-04 21:53:53 +02001959 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
David Decotignyb2d3bcf2018-01-18 09:59:13 -08001960 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1961 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
Stephen Hemminger3e7a50c2018-07-27 13:43:22 -07001962 [IFLA_MIN_MTU] = { .type = NLA_U32 },
1963 [IFLA_MAX_MTU] = { .type = NLA_U32 },
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02001964 [IFLA_PROP_LIST] = { .type = NLA_NESTED },
1965 [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
1966 .len = ALTIFNAMSIZ - 1 },
Michal Kubecekf74877a2019-12-11 10:58:14 +01001967 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
Roopa Prabhu829eb202020-07-31 17:34:01 -07001968 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
Andrei Vagin7e4a5132021-04-06 23:40:03 -07001969 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
Johannes Berg88b71052021-06-12 10:20:56 +02001970 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING },
Coco Lieac1b932022-01-05 02:48:38 -08001971 [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 },
Eric Dumazet89527be2022-05-13 11:33:56 -07001972 [IFLA_TSO_MAX_SIZE] = { .type = NLA_REJECT },
1973 [IFLA_TSO_MAX_SEGS] = { .type = NLA_REJECT },
Nicolas Dichtel7e6e1b52022-09-06 11:55:58 +02001974 [IFLA_ALLMULTI] = { .type = NLA_REJECT },
Xin Long9eefedd2023-01-28 10:58:38 -05001975 [IFLA_GSO_IPV4_MAX_SIZE] = { .type = NLA_U32 },
1976 [IFLA_GRO_IPV4_MAX_SIZE] = { .type = NLA_U32 },
Jiri Pirkof7b12602014-02-18 20:53:18 +01001977};
1978
1979static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1980 [IFLA_INFO_KIND] = { .type = NLA_STRING },
1981 [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1982 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1983 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1984};
1985
Jiri Pirkof7b12602014-02-18 20:53:18 +01001986static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
Daniel Borkmann364d5712015-02-05 18:44:04 +01001987 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
Denis Kirjanov75345f882019-06-17 10:53:41 +02001988 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
Daniel Borkmann364d5712015-02-05 18:44:04 +01001989 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
Moshe Shemesh79aab092016-09-22 12:11:15 +03001990 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
Daniel Borkmann364d5712015-02-05 18:44:04 +01001991 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1992 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1993 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1994 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
Vlad Zolotarov01a3d792015-03-30 21:35:23 +03001995 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +03001996 [IFLA_VF_STATS] = { .type = NLA_NESTED },
Hiroshi Shimamotodd461d62015-08-28 06:57:55 +00001997 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
Eli Cohencc8e27c2016-03-11 22:58:34 +02001998 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1999 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
Eran Ben Elisha3b766cd2015-06-15 17:59:07 +03002000};
2001
Jiri Pirkof7b12602014-02-18 20:53:18 +01002002static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
2003 [IFLA_PORT_VF] = { .type = NLA_U32 },
2004 [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
2005 .len = PORT_PROFILE_MAX },
Jiri Pirkof7b12602014-02-18 20:53:18 +01002006 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
2007 .len = PORT_UUID_MAX },
2008 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
2009 .len = PORT_UUID_MAX },
2010 [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
2011 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
Daniel Borkmann025331d2017-02-17 01:56:11 +01002012
2013 /* Unused, but we need to keep it here since user space could
2014 * fill it. It's also broken with regard to NLA_BINARY use in
2015 * combination with structs.
2016 */
2017 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
2018 .len = sizeof(struct ifla_port_vsi) },
Jiri Pirkof7b12602014-02-18 20:53:18 +01002019};
2020
Brenden Blancod1fdd912016-07-19 12:16:49 -07002021static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
Toke Høiland-Jørgensen92234c82020-03-25 18:23:26 +01002022 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
Brenden Blancod1fdd912016-07-19 12:16:49 -07002023 [IFLA_XDP_FD] = { .type = NLA_S32 },
Toke Høiland-Jørgensen92234c82020-03-25 18:23:26 +01002024 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
Brenden Blancod1fdd912016-07-19 12:16:49 -07002025 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
Daniel Borkmann85de8572016-11-28 23:16:54 +01002026 [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
Martin KaFai Lau58038692017-06-15 17:29:09 -07002027 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
Brenden Blancod1fdd912016-07-19 12:16:49 -07002028};
2029
David Aherndc599f72016-02-02 08:17:07 -08002030static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
2031{
2032 const struct rtnl_link_ops *ops = NULL;
2033 struct nlattr *linfo[IFLA_INFO_MAX + 1];
2034
Johannes Berg8cb08172019-04-26 14:07:28 +02002035 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
David Aherndc599f72016-02-02 08:17:07 -08002036 return NULL;
2037
2038 if (linfo[IFLA_INFO_KIND]) {
2039 char kind[MODULE_NAME_LEN];
2040
Francis Laniel872f6902020-11-15 18:08:06 +01002041 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
David Aherndc599f72016-02-02 08:17:07 -08002042 ops = rtnl_link_ops_get(kind);
2043 }
2044
2045 return ops;
2046}
2047
2048static bool link_master_filtered(struct net_device *dev, int master_idx)
2049{
2050 struct net_device *master;
2051
2052 if (!master_idx)
2053 return false;
2054
2055 master = netdev_master_upper_dev_get(dev);
Lahav Schlesingerd3432bf2021-08-10 09:06:58 +00002056
2057 /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
2058 * another invalid value for ifindex to denote "no master".
2059 */
2060 if (master_idx == -1)
2061 return !!master;
2062
David Aherndc599f72016-02-02 08:17:07 -08002063 if (!master || master->ifindex != master_idx)
2064 return true;
2065
2066 return false;
2067}
2068
2069static bool link_kind_filtered(const struct net_device *dev,
2070 const struct rtnl_link_ops *kind_ops)
2071{
2072 if (kind_ops && dev->rtnl_link_ops != kind_ops)
2073 return true;
2074
2075 return false;
2076}
2077
2078static bool link_dump_filtered(struct net_device *dev,
2079 int master_idx,
2080 const struct rtnl_link_ops *kind_ops)
2081{
2082 if (link_master_filtered(dev, master_idx) ||
2083 link_kind_filtered(dev, kind_ops))
2084 return true;
2085
2086 return false;
2087}
2088
Christian Braunerc383edc2018-09-04 21:53:47 +02002089/**
2090 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
2091 * @sk: netlink socket
2092 * @netnsid: network namespace identifier
2093 *
2094 * Returns the network namespace identified by netnsid on success or an error
2095 * pointer on failure.
2096 */
2097struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
Jiri Benc79e1ad12017-11-02 17:04:38 -02002098{
2099 struct net *net;
2100
Andrei Vaginf428fe42018-01-02 23:27:33 -08002101 net = get_net_ns_by_id(sock_net(sk), netnsid);
Jiri Benc79e1ad12017-11-02 17:04:38 -02002102 if (!net)
2103 return ERR_PTR(-EINVAL);
2104
2105 /* For now, the caller is required to have CAP_NET_ADMIN in
2106 * the user namespace owning the target net ns.
2107 */
Andrei Vaginf428fe42018-01-02 23:27:33 -08002108 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
Jiri Benc79e1ad12017-11-02 17:04:38 -02002109 put_net(net);
2110 return ERR_PTR(-EACCES);
2111 }
2112 return net;
2113}
Christian Braunerc383edc2018-09-04 21:53:47 +02002114EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
Jiri Benc79e1ad12017-11-02 17:04:38 -02002115
David Ahern905cf0a2018-10-07 20:16:30 -07002116static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2117 bool strict_check, struct nlattr **tb,
2118 struct netlink_ext_ack *extack)
2119{
2120 int hdrlen;
2121
2122 if (strict_check) {
2123 struct ifinfomsg *ifm;
2124
2125 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2126 NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2127 return -EINVAL;
2128 }
2129
2130 ifm = nlmsg_data(nlh);
2131 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2132 ifm->ifi_change) {
2133 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2134 return -EINVAL;
2135 }
2136 if (ifm->ifi_index) {
2137 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2138 return -EINVAL;
2139 }
2140
Johannes Berg8cb08172019-04-26 14:07:28 +02002141 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2142 IFLA_MAX, ifla_policy,
2143 extack);
David Ahern905cf0a2018-10-07 20:16:30 -07002144 }
2145
2146 /* A hack to preserve kernel<->userspace interface.
2147 * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2148 * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2149 * what iproute2 < v3.9.0 used.
2150 * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2151 * attribute, its netlink message is shorter than struct ifinfomsg.
2152 */
2153 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2154 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2155
Johannes Berg8cb08172019-04-26 14:07:28 +02002156 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2157 extack);
David Ahern905cf0a2018-10-07 20:16:30 -07002158}
2159
Thomas Grafb60c5112006-08-04 23:05:34 -07002160static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161{
David Ahern905cf0a2018-10-07 20:16:30 -07002162 struct netlink_ext_ack *extack = cb->extack;
2163 const struct nlmsghdr *nlh = cb->nlh;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09002164 struct net *net = sock_net(skb->sk);
Jiri Benc79e1ad12017-11-02 17:04:38 -02002165 struct net *tgt_net = net;
Eric Dumazet7c28bd02009-10-24 06:13:17 -07002166 int h, s_h;
2167 int idx = 0, s_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 struct net_device *dev;
Eric Dumazet7c28bd02009-10-24 06:13:17 -07002169 struct hlist_head *head;
Greg Rose115c9b82012-02-21 16:54:48 -05002170 struct nlattr *tb[IFLA_MAX+1];
2171 u32 ext_filter_mask = 0;
David Aherndc599f72016-02-02 08:17:07 -08002172 const struct rtnl_link_ops *kind_ops = NULL;
2173 unsigned int flags = NLM_F_MULTI;
2174 int master_idx = 0;
Jiri Benc79e1ad12017-11-02 17:04:38 -02002175 int netnsid = -1;
David Ahern905cf0a2018-10-07 20:16:30 -07002176 int err, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177
Eric Dumazet7c28bd02009-10-24 06:13:17 -07002178 s_h = cb->args[0];
2179 s_idx = cb->args[1];
2180
David Ahern905cf0a2018-10-07 20:16:30 -07002181 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2182 if (err < 0) {
2183 if (cb->strict_check)
2184 return err;
Michal Schmidte5eca6d2014-05-28 14:15:19 +02002185
David Ahern905cf0a2018-10-07 20:16:30 -07002186 goto walk_entries;
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00002187 }
Greg Rose115c9b82012-02-21 16:54:48 -05002188
David Ahern905cf0a2018-10-07 20:16:30 -07002189 for (i = 0; i <= IFLA_MAX; ++i) {
2190 if (!tb[i])
2191 continue;
2192
2193 /* new attributes should only be added with strict checking */
2194 switch (i) {
2195 case IFLA_TARGET_NETNSID:
2196 netnsid = nla_get_s32(tb[i]);
2197 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
2198 if (IS_ERR(tgt_net)) {
2199 NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
2200 return PTR_ERR(tgt_net);
2201 }
2202 break;
2203 case IFLA_EXT_MASK:
2204 ext_filter_mask = nla_get_u32(tb[i]);
2205 break;
2206 case IFLA_MASTER:
2207 master_idx = nla_get_u32(tb[i]);
2208 break;
2209 case IFLA_LINKINFO:
2210 kind_ops = linkinfo_to_kind_ops(tb[i]);
2211 break;
2212 default:
2213 if (cb->strict_check) {
2214 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2215 return -EINVAL;
2216 }
2217 }
2218 }
2219
2220 if (master_idx || kind_ops)
2221 flags |= NLM_F_DUMP_FILTERED;
2222
2223walk_entries:
Eric Dumazet7c28bd02009-10-24 06:13:17 -07002224 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2225 idx = 0;
Jiri Benc79e1ad12017-11-02 17:04:38 -02002226 head = &tgt_net->dev_index_head[h];
Eric Dumazetcac5e652015-02-27 09:42:50 -08002227 hlist_for_each_entry(dev, head, index_hlist) {
David Aherndc599f72016-02-02 08:17:07 -08002228 if (link_dump_filtered(dev, master_idx, kind_ops))
Zhang Shengju3f0ae052016-11-19 23:28:32 +08002229 goto cont;
Eric Dumazet7c28bd02009-10-24 06:13:17 -07002230 if (idx < s_idx)
2231 goto cont;
Jiri Benc79e1ad12017-11-02 17:04:38 -02002232 err = rtnl_fill_ifinfo(skb, dev, net,
2233 RTM_NEWLINK,
David Gibson973462b2014-04-24 10:22:35 +10002234 NETLINK_CB(cb->skb).portid,
David Ahern905cf0a2018-10-07 20:16:30 -07002235 nlh->nlmsg_seq, 0, flags,
Nicolas Dichtel38e01b32018-01-25 15:01:39 +01002236 ext_filter_mask, 0, NULL, 0,
Guillaume Naultd4e4fdf2019-10-23 18:39:04 +02002237 netnsid, GFP_KERNEL);
David Gibson973462b2014-04-24 10:22:35 +10002238
David Ahernf6c57752017-05-15 23:19:17 -07002239 if (err < 0) {
2240 if (likely(skb->len))
2241 goto out;
2242
2243 goto out_err;
2244 }
Pavel Emelianov7562f872007-05-03 15:13:45 -07002245cont:
Eric Dumazet7c28bd02009-10-24 06:13:17 -07002246 idx++;
2247 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248 }
Eric Dumazet7c28bd02009-10-24 06:13:17 -07002249out:
David Ahernf6c57752017-05-15 23:19:17 -07002250 err = skb->len;
2251out_err:
Eric Dumazet7c28bd02009-10-24 06:13:17 -07002252 cb->args[1] = idx;
2253 cb->args[0] = h;
zhang kaia9ecb0c2021-03-02 18:16:07 +08002254 cb->seq = tgt_net->dev_base_seq;
Jakub Sitnickid0225782017-08-09 17:39:12 +02002255 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
Jiri Benc79e1ad12017-11-02 17:04:38 -02002256 if (netnsid >= 0)
2257 put_net(tgt_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258
David Ahernf6c57752017-05-15 23:19:17 -07002259 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260}
2261
Johannes Bergfceb6432017-04-12 14:34:07 +02002262int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2263 struct netlink_ext_ack *exterr)
Jiri Pirkof7b12602014-02-18 20:53:18 +01002264{
Johannes Berg8cb08172019-04-26 14:07:28 +02002265 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2266 exterr);
Jiri Pirkof7b12602014-02-18 20:53:18 +01002267}
2268EXPORT_SYMBOL(rtnl_nla_parse_ifla);
Scott Feldman57b61082010-05-17 22:49:55 -07002269
Eric W. Biederman81adee42009-11-08 00:53:51 -08002270struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2271{
2272 struct net *net;
2273 /* Examine the link attributes and figure out which
2274 * network namespace we are talking about.
2275 */
2276 if (tb[IFLA_NET_NS_PID])
2277 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
Eric W. Biedermanf0630522011-05-04 17:51:50 -07002278 else if (tb[IFLA_NET_NS_FD])
2279 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
Eric W. Biederman81adee42009-11-08 00:53:51 -08002280 else
2281 net = get_net(src_net);
2282 return net;
2283}
2284EXPORT_SYMBOL(rtnl_link_get_net);
2285
Christian Brauner7c4f63b2018-01-24 15:26:32 +01002286/* Figure out which network namespace we are talking about by
2287 * examining the link attributes in the following order:
2288 *
2289 * 1. IFLA_NET_NS_PID
2290 * 2. IFLA_NET_NS_FD
Christian Brauner7e4a8d52018-09-04 21:53:53 +02002291 * 3. IFLA_TARGET_NETNSID
Christian Brauner7c4f63b2018-01-24 15:26:32 +01002292 */
2293static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2294 struct nlattr *tb[])
2295{
2296 struct net *net;
2297
2298 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2299 return rtnl_link_get_net(src_net, tb);
2300
Christian Brauner7e4a8d52018-09-04 21:53:53 +02002301 if (!tb[IFLA_TARGET_NETNSID])
Christian Brauner7c4f63b2018-01-24 15:26:32 +01002302 return get_net(src_net);
2303
Christian Brauner7e4a8d52018-09-04 21:53:53 +02002304 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
Christian Brauner7c4f63b2018-01-24 15:26:32 +01002305 if (!net)
2306 return ERR_PTR(-EINVAL);
2307
2308 return net;
2309}
2310
2311static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2312 struct net *src_net,
2313 struct nlattr *tb[], int cap)
2314{
2315 struct net *net;
2316
2317 net = rtnl_link_get_net_by_nlattr(src_net, tb);
2318 if (IS_ERR(net))
2319 return net;
2320
2321 if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2322 put_net(net);
2323 return ERR_PTR(-EPERM);
2324 }
2325
2326 return net;
2327}
2328
Christian Brauner4ff66ca2018-02-07 13:53:20 +01002329/* Verify that rtnetlink requests do not pass additional properties
2330 * potentially referring to different network namespaces.
2331 */
2332static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2333 struct netlink_ext_ack *extack,
2334 bool netns_id_only)
2335{
2336
2337 if (netns_id_only) {
2338 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2339 return 0;
2340
2341 NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2342 return -EOPNOTSUPP;
2343 }
2344
Christian Brauner7e4a8d52018-09-04 21:53:53 +02002345 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
Christian Brauner4ff66ca2018-02-07 13:53:20 +01002346 goto invalid_attr;
2347
Christian Brauner7e4a8d52018-09-04 21:53:53 +02002348 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
Christian Brauner4ff66ca2018-02-07 13:53:20 +01002349 goto invalid_attr;
2350
Christian Brauner7e4a8d52018-09-04 21:53:53 +02002351 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
Christian Brauner4ff66ca2018-02-07 13:53:20 +01002352 goto invalid_attr;
2353
2354 return 0;
2355
2356invalid_attr:
2357 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2358 return -EINVAL;
2359}
2360
Bin Chena14857c2022-05-11 13:39:31 +02002361static int rtnl_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
2362 int max_tx_rate)
2363{
2364 const struct net_device_ops *ops = dev->netdev_ops;
2365
2366 if (!ops->ndo_set_vf_rate)
2367 return -EOPNOTSUPP;
2368 if (max_tx_rate && max_tx_rate < min_tx_rate)
2369 return -EINVAL;
2370
2371 return ops->ndo_set_vf_rate(dev, vf, min_tx_rate, max_tx_rate);
2372}
2373
Rocco Yue8679c312021-08-03 20:02:50 +08002374static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[],
2375 struct netlink_ext_ack *extack)
Thomas Graf1840bb12008-02-23 19:54:36 -08002376{
2377 if (dev) {
2378 if (tb[IFLA_ADDRESS] &&
2379 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2380 return -EINVAL;
2381
2382 if (tb[IFLA_BROADCAST] &&
2383 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2384 return -EINVAL;
2385 }
2386
Thomas Grafcf7afbf2010-11-22 01:31:54 +00002387 if (tb[IFLA_AF_SPEC]) {
2388 struct nlattr *af;
2389 int rem, err;
2390
2391 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2392 const struct rtnl_af_ops *af_ops;
2393
Florian Westphal5fa85a02017-10-16 15:44:36 +02002394 af_ops = rtnl_af_lookup(nla_type(af));
Cong Wanga1002432021-05-08 11:00:33 -07002395 if (!af_ops)
Thomas Grafcf7afbf2010-11-22 01:31:54 +00002396 return -EAFNOSUPPORT;
2397
Cong Wanga1002432021-05-08 11:00:33 -07002398 if (!af_ops->set_link_af)
Thomas Grafcf7afbf2010-11-22 01:31:54 +00002399 return -EOPNOTSUPP;
2400
2401 if (af_ops->validate_link_af) {
Rocco Yue8679c312021-08-03 20:02:50 +08002402 err = af_ops->validate_link_af(dev, af, extack);
Cong Wanga1002432021-05-08 11:00:33 -07002403 if (err < 0)
Thomas Grafcf7afbf2010-11-22 01:31:54 +00002404 return err;
2405 }
2406 }
2407 }
2408
Thomas Graf1840bb12008-02-23 19:54:36 -08002409 return 0;
2410}
2411
Eli Cohencc8e27c2016-03-11 22:58:34 +02002412static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2413 int guid_type)
2414{
2415 const struct net_device_ops *ops = dev->netdev_ops;
2416
2417 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2418}
2419
2420static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2421{
2422 if (dev->type != ARPHRD_INFINIBAND)
2423 return -EOPNOTSUPP;
2424
2425 return handle_infiniband_guid(dev, ivt, guid_type);
2426}
2427
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002428static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
Chris Wrightc02db8c2010-05-16 01:05:45 -07002429{
Chris Wrightc02db8c2010-05-16 01:05:45 -07002430 const struct net_device_ops *ops = dev->netdev_ops;
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002431 int err = -EINVAL;
Chris Wrightc02db8c2010-05-16 01:05:45 -07002432
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002433 if (tb[IFLA_VF_MAC]) {
2434 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
Vlad Zolotarov01a3d792015-03-30 21:35:23 +03002435
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002436 if (ivm->vf >= INT_MAX)
2437 return -EINVAL;
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002438 err = -EOPNOTSUPP;
2439 if (ops->ndo_set_vf_mac)
2440 err = ops->ndo_set_vf_mac(dev, ivm->vf,
2441 ivm->mac);
2442 if (err < 0)
2443 return err;
Chris Wrightc02db8c2010-05-16 01:05:45 -07002444 }
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002445
2446 if (tb[IFLA_VF_VLAN]) {
2447 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2448
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002449 if (ivv->vf >= INT_MAX)
2450 return -EINVAL;
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002451 err = -EOPNOTSUPP;
2452 if (ops->ndo_set_vf_vlan)
2453 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
Moshe Shemesh79aab092016-09-22 12:11:15 +03002454 ivv->qos,
2455 htons(ETH_P_8021Q));
2456 if (err < 0)
2457 return err;
2458 }
2459
2460 if (tb[IFLA_VF_VLAN_LIST]) {
2461 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2462 struct nlattr *attr;
2463 int rem, len = 0;
2464
2465 err = -EOPNOTSUPP;
2466 if (!ops->ndo_set_vf_vlan)
2467 return err;
2468
2469 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2470 if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2471 nla_len(attr) < NLA_HDRLEN) {
2472 return -EINVAL;
2473 }
2474 if (len >= MAX_VLAN_LIST_LEN)
2475 return -EOPNOTSUPP;
2476 ivvl[len] = nla_data(attr);
2477
2478 len++;
2479 }
Arnd Bergmannfa34cd92016-09-30 18:13:49 +02002480 if (len == 0)
2481 return -EINVAL;
2482
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002483 if (ivvl[0]->vf >= INT_MAX)
2484 return -EINVAL;
Moshe Shemesh79aab092016-09-22 12:11:15 +03002485 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2486 ivvl[0]->qos, ivvl[0]->vlan_proto);
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002487 if (err < 0)
2488 return err;
2489 }
2490
2491 if (tb[IFLA_VF_TX_RATE]) {
2492 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2493 struct ifla_vf_info ivf;
2494
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002495 if (ivt->vf >= INT_MAX)
2496 return -EINVAL;
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002497 err = -EOPNOTSUPP;
2498 if (ops->ndo_get_vf_config)
2499 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2500 if (err < 0)
2501 return err;
2502
Bin Chena14857c2022-05-11 13:39:31 +02002503 err = rtnl_set_vf_rate(dev, ivt->vf,
2504 ivf.min_tx_rate, ivt->rate);
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002505 if (err < 0)
2506 return err;
2507 }
2508
2509 if (tb[IFLA_VF_RATE]) {
2510 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2511
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002512 if (ivt->vf >= INT_MAX)
2513 return -EINVAL;
Bin Chena14857c2022-05-11 13:39:31 +02002514
2515 err = rtnl_set_vf_rate(dev, ivt->vf,
2516 ivt->min_tx_rate, ivt->max_tx_rate);
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002517 if (err < 0)
2518 return err;
2519 }
2520
2521 if (tb[IFLA_VF_SPOOFCHK]) {
2522 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2523
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002524 if (ivs->vf >= INT_MAX)
2525 return -EINVAL;
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002526 err = -EOPNOTSUPP;
2527 if (ops->ndo_set_vf_spoofchk)
2528 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2529 ivs->setting);
2530 if (err < 0)
2531 return err;
2532 }
2533
2534 if (tb[IFLA_VF_LINK_STATE]) {
2535 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2536
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002537 if (ivl->vf >= INT_MAX)
2538 return -EINVAL;
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002539 err = -EOPNOTSUPP;
2540 if (ops->ndo_set_vf_link_state)
2541 err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2542 ivl->link_state);
2543 if (err < 0)
2544 return err;
2545 }
2546
2547 if (tb[IFLA_VF_RSS_QUERY_EN]) {
2548 struct ifla_vf_rss_query_en *ivrssq_en;
2549
2550 err = -EOPNOTSUPP;
2551 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002552 if (ivrssq_en->vf >= INT_MAX)
2553 return -EINVAL;
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002554 if (ops->ndo_set_vf_rss_query_en)
2555 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2556 ivrssq_en->setting);
2557 if (err < 0)
2558 return err;
2559 }
2560
Hiroshi Shimamotodd461d62015-08-28 06:57:55 +00002561 if (tb[IFLA_VF_TRUST]) {
2562 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2563
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002564 if (ivt->vf >= INT_MAX)
2565 return -EINVAL;
Hiroshi Shimamotodd461d62015-08-28 06:57:55 +00002566 err = -EOPNOTSUPP;
2567 if (ops->ndo_set_vf_trust)
2568 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2569 if (err < 0)
2570 return err;
2571 }
2572
Eli Cohencc8e27c2016-03-11 22:58:34 +02002573 if (tb[IFLA_VF_IB_NODE_GUID]) {
2574 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2575
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002576 if (ivt->vf >= INT_MAX)
2577 return -EINVAL;
Eli Cohencc8e27c2016-03-11 22:58:34 +02002578 if (!ops->ndo_set_vf_guid)
2579 return -EOPNOTSUPP;
Eli Cohencc8e27c2016-03-11 22:58:34 +02002580 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2581 }
2582
2583 if (tb[IFLA_VF_IB_PORT_GUID]) {
2584 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2585
Dan Carpenterff08ddb2019-11-20 15:34:38 +03002586 if (ivt->vf >= INT_MAX)
2587 return -EINVAL;
Eli Cohencc8e27c2016-03-11 22:58:34 +02002588 if (!ops->ndo_set_vf_guid)
2589 return -EOPNOTSUPP;
2590
2591 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2592 }
2593
Chris Wrightc02db8c2010-05-16 01:05:45 -07002594 return err;
2595}
2596
David Ahern33eaf2a2017-10-04 17:48:46 -07002597static int do_set_master(struct net_device *dev, int ifindex,
2598 struct netlink_ext_ack *extack)
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002599{
Jiri Pirko898e5062013-01-03 22:48:52 +00002600 struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002601 const struct net_device_ops *ops;
2602 int err;
2603
Jiri Pirko898e5062013-01-03 22:48:52 +00002604 if (upper_dev) {
2605 if (upper_dev->ifindex == ifindex)
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002606 return 0;
Jiri Pirko898e5062013-01-03 22:48:52 +00002607 ops = upper_dev->netdev_ops;
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002608 if (ops->ndo_del_slave) {
Jiri Pirko898e5062013-01-03 22:48:52 +00002609 err = ops->ndo_del_slave(upper_dev, dev);
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002610 if (err)
2611 return err;
2612 } else {
2613 return -EOPNOTSUPP;
2614 }
2615 }
2616
2617 if (ifindex) {
Jiri Pirko898e5062013-01-03 22:48:52 +00002618 upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2619 if (!upper_dev)
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002620 return -EINVAL;
Jiri Pirko898e5062013-01-03 22:48:52 +00002621 ops = upper_dev->netdev_ops;
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002622 if (ops->ndo_add_slave) {
David Ahern33eaf2a2017-10-04 17:48:46 -07002623 err = ops->ndo_add_slave(upper_dev, dev, extack);
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002624 if (err)
2625 return err;
2626 } else {
2627 return -EOPNOTSUPP;
2628 }
2629 }
2630 return 0;
2631}
2632
Roopa Prabhu829eb202020-07-31 17:34:01 -07002633static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2634 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2635 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2636};
2637
2638static int do_set_proto_down(struct net_device *dev,
2639 struct nlattr *nl_proto_down,
2640 struct nlattr *nl_proto_down_reason,
2641 struct netlink_ext_ack *extack)
2642{
2643 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
Roopa Prabhu829eb202020-07-31 17:34:01 -07002644 unsigned long mask = 0;
2645 u32 value;
2646 bool proto_down;
2647 int err;
2648
Jakub Kicinski2106efd2021-11-22 17:24:47 -08002649 if (!(dev->priv_flags & IFF_CHANGE_PROTO_DOWN)) {
Roopa Prabhu829eb202020-07-31 17:34:01 -07002650 NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2651 return -EOPNOTSUPP;
2652 }
2653
2654 if (nl_proto_down_reason) {
2655 err = nla_parse_nested_deprecated(pdreason,
2656 IFLA_PROTO_DOWN_REASON_MAX,
2657 nl_proto_down_reason,
2658 ifla_proto_down_reason_policy,
2659 NULL);
2660 if (err < 0)
2661 return err;
2662
2663 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2664 NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2665 return -EINVAL;
2666 }
2667
2668 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2669
2670 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2671 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2672
2673 dev_change_proto_down_reason(dev, mask, value);
2674 }
2675
2676 if (nl_proto_down) {
2677 proto_down = nla_get_u8(nl_proto_down);
2678
Zheng Yongjund467d0b2021-06-02 14:56:23 +08002679 /* Don't turn off protodown if there are active reasons */
Roopa Prabhu829eb202020-07-31 17:34:01 -07002680 if (!proto_down && dev->proto_down_reason) {
2681 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2682 return -EBUSY;
2683 }
2684 err = dev_change_proto_down(dev,
2685 proto_down);
2686 if (err)
2687 return err;
2688 }
2689
2690 return 0;
2691}
2692
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002693#define DO_SETLINK_MODIFIED 0x01
Nicolas Dichtelba998902014-09-01 16:07:29 +02002694/* notify flag means notify + modified. */
2695#define DO_SETLINK_NOTIFY 0x03
Eric W. Biederman90f62cf32014-04-23 14:29:27 -07002696static int do_setlink(const struct sk_buff *skb,
2697 struct net_device *dev, struct ifinfomsg *ifm,
Jakub Kicinskiddf9f972017-04-30 21:46:46 -07002698 struct netlink_ext_ack *extack,
Florent Fourcot5ea08b52022-04-15 18:53:28 +02002699 struct nlattr **tb, int status)
Patrick McHardy0157f602007-06-13 12:03:36 -07002700{
Stephen Hemmingerd3147742008-11-19 21:32:24 -08002701 const struct net_device_ops *ops = dev->netdev_ops;
Florent Fourcot5ea08b52022-04-15 18:53:28 +02002702 char ifname[IFNAMSIZ];
Patrick McHardy0157f602007-06-13 12:03:36 -07002703 int err;
2704
Rocco Yue8679c312021-08-03 20:02:50 +08002705 err = validate_linkmsg(dev, tb, extack);
Eric Dumazet644c7ee2018-06-05 09:25:19 -07002706 if (err < 0)
2707 return err;
2708
Florent Fourcot5ea08b52022-04-15 18:53:28 +02002709 if (tb[IFLA_IFNAME])
2710 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2711 else
2712 ifname[0] = '\0';
2713
Christian Brauner7e4a8d52018-09-04 21:53:53 +02002714 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
Florent Fourcot5ea08b52022-04-15 18:53:28 +02002715 const char *pat = ifname[0] ? ifname : NULL;
Andrei Vagineeb85a12021-04-05 00:12:23 -07002716 struct net *net;
2717 int new_ifindex;
2718
2719 net = rtnl_link_get_net_capable(skb, dev_net(dev),
2720 tb, CAP_NET_ADMIN);
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02002721 if (IS_ERR(net)) {
2722 err = PTR_ERR(net);
2723 goto errout;
2724 }
Christian Brauner7c4f63b2018-01-24 15:26:32 +01002725
Andrei Vagineeb85a12021-04-05 00:12:23 -07002726 if (tb[IFLA_NEW_IFINDEX])
2727 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]);
2728 else
2729 new_ifindex = 0;
2730
Andrey Ignatov96a6b932021-08-25 17:25:40 -07002731 err = __dev_change_net_namespace(dev, net, pat, new_ifindex);
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02002732 put_net(net);
2733 if (err)
2734 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002735 status |= DO_SETLINK_MODIFIED;
Eric W. Biedermand8a5ec62007-09-12 13:57:04 +02002736 }
2737
Patrick McHardy0157f602007-06-13 12:03:36 -07002738 if (tb[IFLA_MAP]) {
2739 struct rtnl_link_ifmap *u_map;
2740 struct ifmap k_map;
2741
Stephen Hemmingerd3147742008-11-19 21:32:24 -08002742 if (!ops->ndo_set_config) {
Patrick McHardy0157f602007-06-13 12:03:36 -07002743 err = -EOPNOTSUPP;
2744 goto errout;
2745 }
2746
2747 if (!netif_device_present(dev)) {
2748 err = -ENODEV;
2749 goto errout;
2750 }
2751
2752 u_map = nla_data(tb[IFLA_MAP]);
2753 k_map.mem_start = (unsigned long) u_map->mem_start;
2754 k_map.mem_end = (unsigned long) u_map->mem_end;
2755 k_map.base_addr = (unsigned short) u_map->base_addr;
2756 k_map.irq = (unsigned char) u_map->irq;
2757 k_map.dma = (unsigned char) u_map->dma;
2758 k_map.port = (unsigned char) u_map->port;
2759
Stephen Hemmingerd3147742008-11-19 21:32:24 -08002760 err = ops->ndo_set_config(dev, &k_map);
Patrick McHardy0157f602007-06-13 12:03:36 -07002761 if (err < 0)
2762 goto errout;
2763
Nicolas Dichtelba998902014-09-01 16:07:29 +02002764 status |= DO_SETLINK_NOTIFY;
Patrick McHardy0157f602007-06-13 12:03:36 -07002765 }
2766
2767 if (tb[IFLA_ADDRESS]) {
2768 struct sockaddr *sa;
2769 int len;
2770
WANG Cong153711f2017-07-20 11:27:57 -07002771 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2772 sizeof(*sa));
Patrick McHardy0157f602007-06-13 12:03:36 -07002773 sa = kmalloc(len, GFP_KERNEL);
2774 if (!sa) {
2775 err = -ENOMEM;
2776 goto errout;
2777 }
2778 sa->sa_family = dev->type;
2779 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2780 dev->addr_len);
Cong Wang3b23a322021-02-11 11:34:10 -08002781 err = dev_set_mac_address_user(dev, sa, extack);
Patrick McHardy0157f602007-06-13 12:03:36 -07002782 kfree(sa);
2783 if (err)
2784 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002785 status |= DO_SETLINK_MODIFIED;
Patrick McHardy0157f602007-06-13 12:03:36 -07002786 }
2787
2788 if (tb[IFLA_MTU]) {
Stephen Hemminger7a4c53b2018-07-27 13:43:23 -07002789 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
Patrick McHardy0157f602007-06-13 12:03:36 -07002790 if (err < 0)
2791 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002792 status |= DO_SETLINK_MODIFIED;
Patrick McHardy0157f602007-06-13 12:03:36 -07002793 }
2794
Vlad Dogarucbda10f2011-01-13 23:38:30 +00002795 if (tb[IFLA_GROUP]) {
2796 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
Nicolas Dichtelba998902014-09-01 16:07:29 +02002797 status |= DO_SETLINK_NOTIFY;
Vlad Dogarucbda10f2011-01-13 23:38:30 +00002798 }
2799
Patrick McHardy0157f602007-06-13 12:03:36 -07002800 /*
2801 * Interface selected by interface index but interface
2802 * name provided implies that a name change has been
2803 * requested.
2804 */
2805 if (ifm->ifi_index > 0 && ifname[0]) {
2806 err = dev_change_name(dev, ifname);
2807 if (err < 0)
2808 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002809 status |= DO_SETLINK_MODIFIED;
Patrick McHardy0157f602007-06-13 12:03:36 -07002810 }
2811
Stephen Hemminger0b815a12008-09-22 21:28:11 -07002812 if (tb[IFLA_IFALIAS]) {
2813 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2814 nla_len(tb[IFLA_IFALIAS]));
2815 if (err < 0)
2816 goto errout;
Nicolas Dichtelba998902014-09-01 16:07:29 +02002817 status |= DO_SETLINK_NOTIFY;
Stephen Hemminger0b815a12008-09-22 21:28:11 -07002818 }
2819
Patrick McHardy0157f602007-06-13 12:03:36 -07002820 if (tb[IFLA_BROADCAST]) {
2821 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
Jiri Pirkoe7c32732013-01-01 03:30:13 +00002822 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
Patrick McHardy0157f602007-06-13 12:03:36 -07002823 }
2824
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002825 if (tb[IFLA_MASTER]) {
David Ahern33eaf2a2017-10-04 17:48:46 -07002826 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002827 if (err)
2828 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002829 status |= DO_SETLINK_MODIFIED;
Jiri Pirkofbaec0e2011-02-13 10:15:37 +00002830 }
2831
Phil Suttera4abfa62022-09-14 17:06:23 +02002832 if (ifm->ifi_flags || ifm->ifi_change) {
2833 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2834 extack);
2835 if (err < 0)
2836 goto errout;
2837 }
2838
Jiri Pirko9a572472012-12-27 23:49:39 +00002839 if (tb[IFLA_CARRIER]) {
2840 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2841 if (err)
2842 goto errout;
Nicolas Dichtel90c325e2014-09-01 16:07:28 +02002843 status |= DO_SETLINK_MODIFIED;
Jiri Pirko9a572472012-12-27 23:49:39 +00002844 }
2845
Nicolas Dichtel5d1180f2014-09-01 16:07:26 +02002846 if (tb[IFLA_TXQLEN]) {
Alexey Dobriyan0cd29502017-05-17 13:30:44 +03002847 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
Nicolas Dichtel5d1180f2014-09-01 16:07:26 +02002848
Cong Wang6a643dd2018-01-25 18:26:22 -08002849 err = dev_change_tx_queue_len(dev, value);
2850 if (err)
2851 goto errout;
2852 status |= DO_SETLINK_MODIFIED;
Nicolas Dichtel5d1180f2014-09-01 16:07:26 +02002853 }
Patrick McHardy0157f602007-06-13 12:03:36 -07002854
Stephen Hemminger46e6b992017-12-07 15:40:19 -08002855 if (tb[IFLA_GSO_MAX_SIZE]) {
2856 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2857
Alexander Duyck7c4e9832022-05-13 11:33:57 -07002858 if (max_size > dev->tso_max_size) {
Stephen Hemminger46e6b992017-12-07 15:40:19 -08002859 err = -EINVAL;
2860 goto errout;
2861 }
2862
2863 if (dev->gso_max_size ^ max_size) {
2864 netif_set_gso_max_size(dev, max_size);
2865 status |= DO_SETLINK_MODIFIED;
2866 }
2867 }
2868
2869 if (tb[IFLA_GSO_MAX_SEGS]) {
2870 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2871
Jakub Kicinski14d7b812022-05-05 19:51:32 -07002872 if (max_segs > GSO_MAX_SEGS || max_segs > dev->tso_max_segs) {
Stephen Hemminger46e6b992017-12-07 15:40:19 -08002873 err = -EINVAL;
2874 goto errout;
2875 }
2876
2877 if (dev->gso_max_segs ^ max_segs) {
Eric Dumazet6d872df2021-11-19 07:43:32 -08002878 netif_set_gso_max_segs(dev, max_segs);
Stephen Hemminger46e6b992017-12-07 15:40:19 -08002879 status |= DO_SETLINK_MODIFIED;
2880 }
2881 }
2882
Coco Lieac1b932022-01-05 02:48:38 -08002883 if (tb[IFLA_GRO_MAX_SIZE]) {
2884 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_MAX_SIZE]);
2885
2886 if (dev->gro_max_size ^ gro_max_size) {
2887 netif_set_gro_max_size(dev, gro_max_size);
2888 status |= DO_SETLINK_MODIFIED;
2889 }
2890 }
2891
Xin Long9eefedd2023-01-28 10:58:38 -05002892 if (tb[IFLA_GSO_IPV4_MAX_SIZE]) {
2893 u32 max_size = nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]);
2894
2895 if (max_size > dev->tso_max_size) {
2896 err = -EINVAL;
2897 goto errout;
2898 }
2899
2900 if (dev->gso_ipv4_max_size ^ max_size) {
2901 netif_set_gso_ipv4_max_size(dev, max_size);
2902 status |= DO_SETLINK_MODIFIED;
2903 }
2904 }
2905
2906 if (tb[IFLA_GRO_IPV4_MAX_SIZE]) {
2907 u32 gro_max_size = nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]);
2908
2909 if (dev->gro_ipv4_max_size ^ gro_max_size) {
2910 netif_set_gro_ipv4_max_size(dev, gro_max_size);
2911 status |= DO_SETLINK_MODIFIED;
2912 }
2913 }
2914
Patrick McHardy0157f602007-06-13 12:03:36 -07002915 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08002916 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Patrick McHardy0157f602007-06-13 12:03:36 -07002917
2918 if (tb[IFLA_LINKMODE]) {
Nicolas Dichtel1889b0e2014-09-01 16:07:27 +02002919 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2920
Sebastian Andrzej Siewiorfd888e82021-11-26 17:15:29 +01002921 write_lock(&dev_base_lock);
Nicolas Dichtel1889b0e2014-09-01 16:07:27 +02002922 if (dev->link_mode ^ value)
Nicolas Dichtelba998902014-09-01 16:07:29 +02002923 status |= DO_SETLINK_NOTIFY;
Nicolas Dichtel1889b0e2014-09-01 16:07:27 +02002924 dev->link_mode = value;
Sebastian Andrzej Siewiorfd888e82021-11-26 17:15:29 +01002925 write_unlock(&dev_base_lock);
Patrick McHardy0157f602007-06-13 12:03:36 -07002926 }
2927
Chris Wrightc02db8c2010-05-16 01:05:45 -07002928 if (tb[IFLA_VFINFO_LIST]) {
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002929 struct nlattr *vfinfo[IFLA_VF_MAX + 1];
Chris Wrightc02db8c2010-05-16 01:05:45 -07002930 struct nlattr *attr;
2931 int rem;
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002932
Chris Wrightc02db8c2010-05-16 01:05:45 -07002933 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002934 if (nla_type(attr) != IFLA_VF_INFO ||
2935 nla_len(attr) < NLA_HDRLEN) {
David Howells253683b2010-05-21 02:25:27 +00002936 err = -EINVAL;
Chris Wrightc02db8c2010-05-16 01:05:45 -07002937 goto errout;
David Howells253683b2010-05-21 02:25:27 +00002938 }
Johannes Berg8cb08172019-04-26 14:07:28 +02002939 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2940 attr,
2941 ifla_vf_policy,
2942 NULL);
Daniel Borkmann4f7d2cd2015-07-07 00:07:52 +02002943 if (err < 0)
2944 goto errout;
2945 err = do_setvfinfo(dev, vfinfo);
Chris Wrightc02db8c2010-05-16 01:05:45 -07002946 if (err < 0)
2947 goto errout;
Nicolas Dichtelba998902014-09-01 16:07:29 +02002948 status |= DO_SETLINK_NOTIFY;
Chris Wrightc02db8c2010-05-16 01:05:45 -07002949 }
Williams, Mitch Aebc08a62010-02-10 01:44:05 +00002950 }
Patrick McHardy0157f602007-06-13 12:03:36 -07002951 err = 0;
2952
Scott Feldman57b61082010-05-17 22:49:55 -07002953 if (tb[IFLA_VF_PORTS]) {
2954 struct nlattr *port[IFLA_PORT_MAX+1];
2955 struct nlattr *attr;
2956 int vf;
2957 int rem;
2958
2959 err = -EOPNOTSUPP;
2960 if (!ops->ndo_set_vf_port)
2961 goto errout;
2962
2963 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
Daniel Borkmann035d2102015-07-13 00:06:02 +02002964 if (nla_type(attr) != IFLA_VF_PORT ||
2965 nla_len(attr) < NLA_HDRLEN) {
2966 err = -EINVAL;
2967 goto errout;
2968 }
Johannes Berg8cb08172019-04-26 14:07:28 +02002969 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2970 attr,
2971 ifla_port_policy,
2972 NULL);
Scott Feldman57b61082010-05-17 22:49:55 -07002973 if (err < 0)
2974 goto errout;
2975 if (!port[IFLA_PORT_VF]) {
2976 err = -EOPNOTSUPP;
2977 goto errout;
2978 }
2979 vf = nla_get_u32(port[IFLA_PORT_VF]);
2980 err = ops->ndo_set_vf_port(dev, vf, port);
2981 if (err < 0)
2982 goto errout;
Nicolas Dichtelba998902014-09-01 16:07:29 +02002983 status |= DO_SETLINK_NOTIFY;
Scott Feldman57b61082010-05-17 22:49:55 -07002984 }
2985 }
2986 err = 0;
2987
2988 if (tb[IFLA_PORT_SELF]) {
2989 struct nlattr *port[IFLA_PORT_MAX+1];
2990
Johannes Berg8cb08172019-04-26 14:07:28 +02002991 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2992 tb[IFLA_PORT_SELF],
2993 ifla_port_policy, NULL);
Scott Feldman57b61082010-05-17 22:49:55 -07002994 if (err < 0)
2995 goto errout;
2996
2997 err = -EOPNOTSUPP;
2998 if (ops->ndo_set_vf_port)
2999 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
3000 if (err < 0)
3001 goto errout;
Nicolas Dichtelba998902014-09-01 16:07:29 +02003002 status |= DO_SETLINK_NOTIFY;
Scott Feldman57b61082010-05-17 22:49:55 -07003003 }
Thomas Graff8ff1822010-11-16 04:30:14 +00003004
3005 if (tb[IFLA_AF_SPEC]) {
3006 struct nlattr *af;
3007 int rem;
3008
3009 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
3010 const struct rtnl_af_ops *af_ops;
3011
Gustavo A. R. Silva058c8d52017-10-20 19:43:11 -05003012 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
Thomas Graff8ff1822010-11-16 04:30:14 +00003013
Stephen Hemminger3583a4e2021-04-07 08:59:12 -07003014 err = af_ops->set_link_af(dev, af, extack);
Cong Wanga1002432021-05-08 11:00:33 -07003015 if (err < 0)
Thomas Graff8ff1822010-11-16 04:30:14 +00003016 goto errout;
3017
Nicolas Dichtelba998902014-09-01 16:07:29 +02003018 status |= DO_SETLINK_NOTIFY;
Thomas Graff8ff1822010-11-16 04:30:14 +00003019 }
3020 }
Scott Feldman57b61082010-05-17 22:49:55 -07003021 err = 0;
3022
Roopa Prabhu829eb202020-07-31 17:34:01 -07003023 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
3024 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
3025 tb[IFLA_PROTO_DOWN_REASON], extack);
Anuradha Karuppiah88d63782015-07-14 13:43:20 -07003026 if (err)
3027 goto errout;
3028 status |= DO_SETLINK_NOTIFY;
3029 }
3030
Brenden Blancod1fdd912016-07-19 12:16:49 -07003031 if (tb[IFLA_XDP]) {
3032 struct nlattr *xdp[IFLA_XDP_MAX + 1];
Daniel Borkmann85de8572016-11-28 23:16:54 +01003033 u32 xdp_flags = 0;
Brenden Blancod1fdd912016-07-19 12:16:49 -07003034
Johannes Berg8cb08172019-04-26 14:07:28 +02003035 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
3036 tb[IFLA_XDP],
3037 ifla_xdp_policy, NULL);
Brenden Blancod1fdd912016-07-19 12:16:49 -07003038 if (err < 0)
3039 goto errout;
3040
Martin KaFai Lau58038692017-06-15 17:29:09 -07003041 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
Brenden Blanco262d8622016-07-20 17:22:34 -07003042 err = -EINVAL;
3043 goto errout;
3044 }
Daniel Borkmann85de8572016-11-28 23:16:54 +01003045
3046 if (xdp[IFLA_XDP_FLAGS]) {
3047 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
3048 if (xdp_flags & ~XDP_FLAGS_MASK) {
3049 err = -EINVAL;
3050 goto errout;
3051 }
Jakub Kicinskiee5d0322017-06-21 18:25:04 -07003052 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
Daniel Borkmann0489df92017-05-12 01:04:45 +02003053 err = -EINVAL;
3054 goto errout;
3055 }
Daniel Borkmann85de8572016-11-28 23:16:54 +01003056 }
3057
Brenden Blancod1fdd912016-07-19 12:16:49 -07003058 if (xdp[IFLA_XDP_FD]) {
Toke Høiland-Jørgensen92234c82020-03-25 18:23:26 +01003059 int expected_fd = -1;
3060
3061 if (xdp_flags & XDP_FLAGS_REPLACE) {
3062 if (!xdp[IFLA_XDP_EXPECTED_FD]) {
3063 err = -EINVAL;
3064 goto errout;
3065 }
3066 expected_fd =
3067 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
3068 }
3069
Jakub Kicinskiddf9f972017-04-30 21:46:46 -07003070 err = dev_change_xdp_fd(dev, extack,
Daniel Borkmann85de8572016-11-28 23:16:54 +01003071 nla_get_s32(xdp[IFLA_XDP_FD]),
Toke Høiland-Jørgensen92234c82020-03-25 18:23:26 +01003072 expected_fd,
Daniel Borkmann85de8572016-11-28 23:16:54 +01003073 xdp_flags);
Brenden Blancod1fdd912016-07-19 12:16:49 -07003074 if (err)
3075 goto errout;
3076 status |= DO_SETLINK_NOTIFY;
3077 }
3078 }
3079
Patrick McHardy0157f602007-06-13 12:03:36 -07003080errout:
Nicolas Dichtelba998902014-09-01 16:07:29 +02003081 if (status & DO_SETLINK_MODIFIED) {
Xin Long64ff90c2017-10-15 18:13:45 +08003082 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
Nicolas Dichtelba998902014-09-01 16:07:29 +02003083 netdev_state_change(dev);
3084
3085 if (err < 0)
3086 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",
3087 dev->name);
3088 }
Patrick McHardy0157f602007-06-13 12:03:36 -07003089
Patrick McHardy0157f602007-06-13 12:03:36 -07003090 return err;
3091}
3092
Jiri Pirkocc6090e2019-09-30 11:48:19 +02003093static struct net_device *rtnl_dev_get(struct net *net,
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003094 struct nlattr *tb[])
Jiri Pirkocc6090e2019-09-30 11:48:19 +02003095{
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003096 char ifname[ALTIFNAMSIZ];
Jiri Pirkocc6090e2019-09-30 11:48:19 +02003097
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003098 if (tb[IFLA_IFNAME])
3099 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3100 else if (tb[IFLA_ALT_IFNAME])
3101 nla_strscpy(ifname, tb[IFLA_ALT_IFNAME], ALTIFNAMSIZ);
3102 else
3103 return NULL;
Jiri Pirkocc6090e2019-09-30 11:48:19 +02003104
3105 return __dev_get_by_name(net, ifname);
3106}
3107
David Ahernc21ef3e2017-04-16 09:48:24 -07003108static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3109 struct netlink_ext_ack *extack)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003110{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003111 struct net *net = sock_net(skb->sk);
Thomas Grafda5e0492006-08-10 21:17:37 -07003112 struct ifinfomsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003113 struct net_device *dev;
Patrick McHardy0157f602007-06-13 12:03:36 -07003114 int err;
Thomas Grafda5e0492006-08-10 21:17:37 -07003115 struct nlattr *tb[IFLA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003116
Johannes Berg8cb08172019-04-26 14:07:28 +02003117 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3118 ifla_policy, extack);
Thomas Grafda5e0492006-08-10 21:17:37 -07003119 if (err < 0)
3120 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003121
Christian Brauner4ff66ca2018-02-07 13:53:20 +01003122 err = rtnl_ensure_unique_netns(tb, extack, false);
3123 if (err < 0)
3124 goto errout;
3125
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126 err = -EINVAL;
Thomas Grafda5e0492006-08-10 21:17:37 -07003127 ifm = nlmsg_data(nlh);
Patrick McHardy51055be2007-06-05 12:40:01 -07003128 if (ifm->ifi_index > 0)
Eric Dumazeta3d12892009-10-21 10:59:31 +00003129 dev = __dev_get_by_index(net, ifm->ifi_index);
Jiri Pirko76c9ac02019-09-30 11:48:20 +02003130 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003131 dev = rtnl_dev_get(net, tb);
Thomas Grafda5e0492006-08-10 21:17:37 -07003132 else
3133 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003134
Thomas Grafda5e0492006-08-10 21:17:37 -07003135 if (dev == NULL) {
3136 err = -ENODEV;
3137 goto errout;
3138 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003140 err = do_setlink(skb, dev, ifm, extack, tb, 0);
Thomas Grafda5e0492006-08-10 21:17:37 -07003141errout:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003142 return err;
3143}
3144
WANG Cong66400d52015-03-24 11:53:31 -07003145static int rtnl_group_dellink(const struct net *net, int group)
3146{
3147 struct net_device *dev, *aux;
3148 LIST_HEAD(list_kill);
3149 bool found = false;
3150
3151 if (!group)
3152 return -EPERM;
3153
3154 for_each_netdev(net, dev) {
3155 if (dev->group == group) {
3156 const struct rtnl_link_ops *ops;
3157
3158 found = true;
3159 ops = dev->rtnl_link_ops;
3160 if (!ops || !ops->dellink)
3161 return -EOPNOTSUPP;
3162 }
3163 }
3164
3165 if (!found)
3166 return -ENODEV;
3167
3168 for_each_netdev_safe(net, dev, aux) {
3169 if (dev->group == group) {
3170 const struct rtnl_link_ops *ops;
3171
3172 ops = dev->rtnl_link_ops;
3173 ops->dellink(dev, &list_kill);
3174 }
3175 }
3176 unregister_netdevice_many(&list_kill);
3177
3178 return 0;
3179}
3180
Hangbin Liuf3a63cc2022-10-28 04:42:24 -04003181int rtnl_delete_link(struct net_device *dev, u32 portid, const struct nlmsghdr *nlh)
Thomas Graf614732e2015-07-21 10:44:06 +02003182{
3183 const struct rtnl_link_ops *ops;
3184 LIST_HEAD(list_kill);
3185
3186 ops = dev->rtnl_link_ops;
3187 if (!ops || !ops->dellink)
3188 return -EOPNOTSUPP;
3189
3190 ops->dellink(dev, &list_kill);
Hangbin Liuf3a63cc2022-10-28 04:42:24 -04003191 unregister_netdevice_many_notify(&list_kill, portid, nlh);
Thomas Graf614732e2015-07-21 10:44:06 +02003192
3193 return 0;
3194}
3195EXPORT_SYMBOL_GPL(rtnl_delete_link);
3196
David Ahernc21ef3e2017-04-16 09:48:24 -07003197static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3198 struct netlink_ext_ack *extack)
Patrick McHardy38f7b872007-06-13 12:03:51 -07003199{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003200 struct net *net = sock_net(skb->sk);
Hangbin Liuf3a63cc2022-10-28 04:42:24 -04003201 u32 portid = NETLINK_CB(skb).portid;
Christian Braunerb61ad682018-01-24 15:26:34 +01003202 struct net *tgt_net = net;
3203 struct net_device *dev = NULL;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003204 struct ifinfomsg *ifm;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003205 struct nlattr *tb[IFLA_MAX+1];
3206 int err;
Christian Braunerb61ad682018-01-24 15:26:34 +01003207 int netnsid = -1;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003208
Johannes Berg8cb08172019-04-26 14:07:28 +02003209 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3210 ifla_policy, extack);
Patrick McHardy38f7b872007-06-13 12:03:51 -07003211 if (err < 0)
3212 return err;
3213
Christian Brauner4ff66ca2018-02-07 13:53:20 +01003214 err = rtnl_ensure_unique_netns(tb, extack, true);
3215 if (err < 0)
3216 return err;
3217
Christian Brauner7e4a8d52018-09-04 21:53:53 +02003218 if (tb[IFLA_TARGET_NETNSID]) {
3219 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
Christian Braunerc383edc2018-09-04 21:53:47 +02003220 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
Christian Braunerb61ad682018-01-24 15:26:34 +01003221 if (IS_ERR(tgt_net))
3222 return PTR_ERR(tgt_net);
3223 }
3224
3225 err = -EINVAL;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003226 ifm = nlmsg_data(nlh);
3227 if (ifm->ifi_index > 0)
Christian Braunerb61ad682018-01-24 15:26:34 +01003228 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
Jiri Pirko76c9ac02019-09-30 11:48:20 +02003229 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003230 dev = rtnl_dev_get(net, tb);
WANG Cong66400d52015-03-24 11:53:31 -07003231 else if (tb[IFLA_GROUP])
Christian Braunerb61ad682018-01-24 15:26:34 +01003232 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
Patrick McHardy38f7b872007-06-13 12:03:51 -07003233 else
Christian Braunerb61ad682018-01-24 15:26:34 +01003234 goto out;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003235
Christian Braunerb61ad682018-01-24 15:26:34 +01003236 if (!dev) {
Florent Fourcotdee04162022-04-15 18:53:29 +02003237 if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0)
Christian Braunerb61ad682018-01-24 15:26:34 +01003238 err = -ENODEV;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003239
Christian Braunerb61ad682018-01-24 15:26:34 +01003240 goto out;
3241 }
3242
Hangbin Liuf3a63cc2022-10-28 04:42:24 -04003243 err = rtnl_delete_link(dev, portid, nlh);
Christian Braunerb61ad682018-01-24 15:26:34 +01003244
3245out:
3246 if (netnsid >= 0)
3247 put_net(tgt_net);
3248
3249 return err;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003250}
3251
Hangbin Liu1d997f12022-10-28 04:42:21 -04003252int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm,
3253 u32 portid, const struct nlmsghdr *nlh)
Patrick McHardy3729d502010-02-26 06:34:54 +00003254{
3255 unsigned int old_flags;
3256 int err;
3257
3258 old_flags = dev->flags;
3259 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
Petr Machata6d040322018-12-06 17:05:43 +00003260 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3261 NULL);
Patrick McHardy3729d502010-02-26 06:34:54 +00003262 if (err < 0)
3263 return err;
3264 }
3265
Roopa Prabhu8d356b82018-07-04 16:46:29 -07003266 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
Hangbin Liu1d997f12022-10-28 04:42:21 -04003267 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags), portid, nlh);
Roopa Prabhu8d356b82018-07-04 16:46:29 -07003268 } else {
3269 dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
Hangbin Liu1d997f12022-10-28 04:42:21 -04003270 __dev_notify_flags(dev, old_flags, ~0U, portid, nlh);
Roopa Prabhu8d356b82018-07-04 16:46:29 -07003271 }
Patrick McHardy3729d502010-02-26 06:34:54 +00003272 return 0;
3273}
3274EXPORT_SYMBOL(rtnl_configure_link);
3275
David Ahernd0522f12018-11-06 12:51:14 -08003276struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3277 unsigned char name_assign_type,
3278 const struct rtnl_link_ops *ops,
3279 struct nlattr *tb[],
3280 struct netlink_ext_ack *extack)
Pavel Emelianove7199282007-08-08 22:16:38 -07003281{
Pavel Emelianove7199282007-08-08 22:16:38 -07003282 struct net_device *dev;
Jiri Pirkod40156a2012-07-20 02:28:47 +00003283 unsigned int num_tx_queues = 1;
3284 unsigned int num_rx_queues = 1;
Pavel Emelianove7199282007-08-08 22:16:38 -07003285
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00003286 if (tb[IFLA_NUM_TX_QUEUES])
3287 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3288 else if (ops->get_num_tx_queues)
Jiri Pirkod40156a2012-07-20 02:28:47 +00003289 num_tx_queues = ops->get_num_tx_queues();
Jiri Pirko76ff5cc2012-07-20 02:28:48 +00003290
3291 if (tb[IFLA_NUM_RX_QUEUES])
3292 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3293 else if (ops->get_num_rx_queues)
Jiri Pirkod40156a2012-07-20 02:28:47 +00003294 num_rx_queues = ops->get_num_rx_queues();
stephen hemmingerefacb302012-04-10 18:34:43 +00003295
David Ahernd0522f12018-11-06 12:51:14 -08003296 if (num_tx_queues < 1 || num_tx_queues > 4096) {
3297 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
Eric Dumazet0e1d6ec2018-10-02 15:47:35 -07003298 return ERR_PTR(-EINVAL);
David Ahernd0522f12018-11-06 12:51:14 -08003299 }
Eric Dumazet0e1d6ec2018-10-02 15:47:35 -07003300
David Ahernd0522f12018-11-06 12:51:14 -08003301 if (num_rx_queues < 1 || num_rx_queues > 4096) {
3302 NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
Eric Dumazet0e1d6ec2018-10-02 15:47:35 -07003303 return ERR_PTR(-EINVAL);
David Ahernd0522f12018-11-06 12:51:14 -08003304 }
Eric Dumazet0e1d6ec2018-10-02 15:47:35 -07003305
Johannes Berg8c713dc2021-06-12 10:20:54 +02003306 if (ops->alloc) {
3307 dev = ops->alloc(tb, ifname, name_assign_type,
3308 num_tx_queues, num_rx_queues);
3309 if (IS_ERR(dev))
3310 return dev;
3311 } else {
3312 dev = alloc_netdev_mqs(ops->priv_size, ifname,
3313 name_assign_type, ops->setup,
3314 num_tx_queues, num_rx_queues);
3315 }
3316
Pavel Emelianove7199282007-08-08 22:16:38 -07003317 if (!dev)
Tobias Klauserd1892e42017-02-20 16:32:06 +01003318 return ERR_PTR(-ENOMEM);
Pavel Emelianove7199282007-08-08 22:16:38 -07003319
Eric W. Biederman81adee42009-11-08 00:53:51 -08003320 dev_net_set(dev, net);
3321 dev->rtnl_link_ops = ops;
Patrick McHardy3729d502010-02-26 06:34:54 +00003322 dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
Eric W. Biederman81adee42009-11-08 00:53:51 -08003323
Eric Dumazetd836f5c2020-01-21 22:47:29 -08003324 if (tb[IFLA_MTU]) {
3325 u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3326 int err;
3327
3328 err = dev_validate_mtu(dev, mtu, extack);
3329 if (err) {
3330 free_netdev(dev);
3331 return ERR_PTR(err);
3332 }
3333 dev->mtu = mtu;
3334 }
Jiri Pirko2afb9b52013-01-06 12:41:57 +00003335 if (tb[IFLA_ADDRESS]) {
Jakub Kicinskiefd38f72021-10-22 16:20:57 -07003336 __dev_addr_set(dev, nla_data(tb[IFLA_ADDRESS]),
3337 nla_len(tb[IFLA_ADDRESS]));
Jiri Pirko2afb9b52013-01-06 12:41:57 +00003338 dev->addr_assign_type = NET_ADDR_SET;
3339 }
Pavel Emelianove7199282007-08-08 22:16:38 -07003340 if (tb[IFLA_BROADCAST])
3341 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3342 nla_len(tb[IFLA_BROADCAST]));
3343 if (tb[IFLA_TXQLEN])
3344 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3345 if (tb[IFLA_OPERSTATE])
David S. Miller93b2d4a2008-02-17 18:35:07 -08003346 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
Pavel Emelianove7199282007-08-08 22:16:38 -07003347 if (tb[IFLA_LINKMODE])
3348 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
Patrick McHardyffa934f2011-01-20 03:00:42 +00003349 if (tb[IFLA_GROUP])
3350 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
Stephen Hemminger46e6b992017-12-07 15:40:19 -08003351 if (tb[IFLA_GSO_MAX_SIZE])
3352 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3353 if (tb[IFLA_GSO_MAX_SEGS])
Eric Dumazet6d872df2021-11-19 07:43:32 -08003354 netif_set_gso_max_segs(dev, nla_get_u32(tb[IFLA_GSO_MAX_SEGS]));
Coco Lieac1b932022-01-05 02:48:38 -08003355 if (tb[IFLA_GRO_MAX_SIZE])
3356 netif_set_gro_max_size(dev, nla_get_u32(tb[IFLA_GRO_MAX_SIZE]));
Xin Long9eefedd2023-01-28 10:58:38 -05003357 if (tb[IFLA_GSO_IPV4_MAX_SIZE])
3358 netif_set_gso_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]));
3359 if (tb[IFLA_GRO_IPV4_MAX_SIZE])
3360 netif_set_gro_ipv4_max_size(dev, nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]));
Pavel Emelianove7199282007-08-08 22:16:38 -07003361
3362 return dev;
Pavel Emelianove7199282007-08-08 22:16:38 -07003363}
Eric Dumazete0d087a2009-11-07 01:26:17 -08003364EXPORT_SYMBOL(rtnl_create_link);
Pavel Emelianove7199282007-08-08 22:16:38 -07003365
Eric W. Biederman90f62cf32014-04-23 14:29:27 -07003366static int rtnl_group_changelink(const struct sk_buff *skb,
3367 struct net *net, int group,
Vlad Dogarue7ed8282011-01-13 23:38:31 +00003368 struct ifinfomsg *ifm,
Jakub Kicinskiddf9f972017-04-30 21:46:46 -07003369 struct netlink_ext_ack *extack,
Vlad Dogarue7ed8282011-01-13 23:38:31 +00003370 struct nlattr **tb)
3371{
WANG Congd0795352015-03-23 16:31:09 -07003372 struct net_device *dev, *aux;
Vlad Dogarue7ed8282011-01-13 23:38:31 +00003373 int err;
3374
WANG Congd0795352015-03-23 16:31:09 -07003375 for_each_netdev_safe(net, dev, aux) {
Vlad Dogarue7ed8282011-01-13 23:38:31 +00003376 if (dev->group == group) {
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003377 err = do_setlink(skb, dev, ifm, extack, tb, 0);
Vlad Dogarue7ed8282011-01-13 23:38:31 +00003378 if (err < 0)
3379 return err;
3380 }
3381 }
3382
3383 return 0;
3384}
3385
Jakub Kicinski63105e82022-04-29 16:55:07 -07003386static int rtnl_newlink_create(struct sk_buff *skb, struct ifinfomsg *ifm,
3387 const struct rtnl_link_ops *ops,
Hangbin Liud88e1362022-10-28 04:42:23 -04003388 const struct nlmsghdr *nlh,
Jakub Kicinski63105e82022-04-29 16:55:07 -07003389 struct nlattr **tb, struct nlattr **data,
Jakub Kicinski02839cc2022-04-29 16:55:08 -07003390 struct netlink_ext_ack *extack)
3391{
3392 unsigned char name_assign_type = NET_NAME_USER;
3393 struct net *net = sock_net(skb->sk);
Hangbin Liud88e1362022-10-28 04:42:23 -04003394 u32 portid = NETLINK_CB(skb).portid;
Jakub Kicinski02839cc2022-04-29 16:55:08 -07003395 struct net *dest_net, *link_net;
3396 struct net_device *dev;
3397 char ifname[IFNAMSIZ];
3398 int err;
3399
3400 if (!ops->alloc && !ops->setup)
3401 return -EOPNOTSUPP;
3402
3403 if (tb[IFLA_IFNAME]) {
3404 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3405 } else {
3406 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3407 name_assign_type = NET_NAME_ENUM;
3408 }
3409
3410 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3411 if (IS_ERR(dest_net))
3412 return PTR_ERR(dest_net);
3413
3414 if (tb[IFLA_LINK_NETNSID]) {
3415 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3416
3417 link_net = get_net_ns_by_id(dest_net, id);
3418 if (!link_net) {
3419 NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3420 err = -EINVAL;
3421 goto out;
3422 }
3423 err = -EPERM;
3424 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3425 goto out;
3426 } else {
3427 link_net = NULL;
3428 }
3429
3430 dev = rtnl_create_link(link_net ? : dest_net, ifname,
3431 name_assign_type, ops, tb, extack);
3432 if (IS_ERR(dev)) {
3433 err = PTR_ERR(dev);
3434 goto out;
3435 }
3436
3437 dev->ifindex = ifm->ifi_index;
3438
3439 if (ops->newlink)
3440 err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3441 else
3442 err = register_netdevice(dev);
3443 if (err < 0) {
3444 free_netdev(dev);
3445 goto out;
3446 }
3447
Hangbin Liud88e1362022-10-28 04:42:23 -04003448 err = rtnl_configure_link(dev, ifm, portid, nlh);
Jakub Kicinski02839cc2022-04-29 16:55:08 -07003449 if (err < 0)
3450 goto out_unregister;
3451 if (link_net) {
3452 err = dev_change_net_namespace(dev, dest_net, ifname);
3453 if (err < 0)
3454 goto out_unregister;
3455 }
3456 if (tb[IFLA_MASTER]) {
3457 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3458 if (err)
3459 goto out_unregister;
3460 }
3461out:
3462 if (link_net)
3463 put_net(link_net);
3464 put_net(dest_net);
3465 return err;
3466out_unregister:
3467 if (ops->newlink) {
3468 LIST_HEAD(list_kill);
3469
3470 ops->dellink(dev, &list_kill);
3471 unregister_netdevice_many(&list_kill);
3472 } else {
3473 unregister_netdevice(dev);
3474 }
3475 goto out;
3476}
Jakub Kicinski63105e82022-04-29 16:55:07 -07003477
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003478struct rtnl_newlink_tbs {
3479 struct nlattr *tb[IFLA_MAX + 1];
3480 struct nlattr *attr[RTNL_MAX_TYPE + 1];
Jakub Kicinski420d0312018-11-27 22:32:30 -08003481 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003482};
3483
3484static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3485 struct rtnl_newlink_tbs *tbs,
3486 struct netlink_ext_ack *extack)
3487{
Jakub Kicinski420d0312018-11-27 22:32:30 -08003488 struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003489 struct nlattr ** const tb = tbs->tb;
Eric Dumazetc6f6f242022-01-31 17:21:06 -08003490 const struct rtnl_link_ops *m_ops;
3491 struct net_device *master_dev;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003492 struct net *net = sock_net(skb->sk);
Patrick McHardy38f7b872007-06-13 12:03:51 -07003493 const struct rtnl_link_ops *ops;
Jakub Kicinski420d0312018-11-27 22:32:30 -08003494 struct nlattr **slave_data;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003495 char kind[MODULE_NAME_LEN];
Jakub Kicinski420d0312018-11-27 22:32:30 -08003496 struct net_device *dev;
3497 struct ifinfomsg *ifm;
Jakub Kicinski420d0312018-11-27 22:32:30 -08003498 struct nlattr **data;
Florent Fourcotef2a7c92022-04-15 18:53:27 +02003499 bool link_specified;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003500 int err;
3501
Johannes Berg95a5afc2008-10-16 15:24:51 -07003502#ifdef CONFIG_MODULES
Patrick McHardy38f7b872007-06-13 12:03:51 -07003503replay:
Thomas Graf8072f082007-07-31 14:13:50 -07003504#endif
Johannes Berg8cb08172019-04-26 14:07:28 +02003505 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3506 ifla_policy, extack);
Patrick McHardy38f7b872007-06-13 12:03:51 -07003507 if (err < 0)
3508 return err;
3509
Christian Brauner4ff66ca2018-02-07 13:53:20 +01003510 err = rtnl_ensure_unique_netns(tb, extack, false);
3511 if (err < 0)
3512 return err;
3513
Patrick McHardy38f7b872007-06-13 12:03:51 -07003514 ifm = nlmsg_data(nlh);
Florent Fourcotef2a7c92022-04-15 18:53:27 +02003515 if (ifm->ifi_index > 0) {
3516 link_specified = true;
Eric W. Biederman881d9662007-09-17 11:56:21 -07003517 dev = __dev_get_by_index(net, ifm->ifi_index);
Florent Fourcotef2a7c92022-04-15 18:53:27 +02003518 } else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) {
3519 link_specified = true;
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003520 dev = rtnl_dev_get(net, tb);
Florent Fourcotef2a7c92022-04-15 18:53:27 +02003521 } else {
3522 link_specified = false;
Jiri Pirko7af12cb2019-09-30 11:48:18 +02003523 dev = NULL;
Florent Fourcotef2a7c92022-04-15 18:53:27 +02003524 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07003525
Eric Dumazetc6f6f242022-01-31 17:21:06 -08003526 master_dev = NULL;
3527 m_ops = NULL;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01003528 if (dev) {
3529 master_dev = netdev_master_upper_dev_get(dev);
3530 if (master_dev)
3531 m_ops = master_dev->rtnl_link_ops;
3532 }
3533
Rocco Yue8679c312021-08-03 20:02:50 +08003534 err = validate_linkmsg(dev, tb, extack);
Eric Dumazete0d087a2009-11-07 01:26:17 -08003535 if (err < 0)
Thomas Graf1840bb12008-02-23 19:54:36 -08003536 return err;
3537
Patrick McHardy38f7b872007-06-13 12:03:51 -07003538 if (tb[IFLA_LINKINFO]) {
Johannes Berg8cb08172019-04-26 14:07:28 +02003539 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3540 tb[IFLA_LINKINFO],
3541 ifla_info_policy, NULL);
Patrick McHardy38f7b872007-06-13 12:03:51 -07003542 if (err < 0)
3543 return err;
3544 } else
3545 memset(linkinfo, 0, sizeof(linkinfo));
3546
3547 if (linkinfo[IFLA_INFO_KIND]) {
Francis Laniel872f6902020-11-15 18:08:06 +01003548 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
Patrick McHardy38f7b872007-06-13 12:03:51 -07003549 ops = rtnl_link_ops_get(kind);
3550 } else {
3551 kind[0] = '\0';
3552 ops = NULL;
3553 }
3554
Jakub Kicinski420d0312018-11-27 22:32:30 -08003555 data = NULL;
3556 if (ops) {
3557 if (ops->maxtype > RTNL_MAX_TYPE)
3558 return -EINVAL;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003559
Jakub Kicinski420d0312018-11-27 22:32:30 -08003560 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003561 err = nla_parse_nested_deprecated(tbs->attr, ops->maxtype,
Johannes Berg8cb08172019-04-26 14:07:28 +02003562 linkinfo[IFLA_INFO_DATA],
3563 ops->policy, extack);
Jakub Kicinski420d0312018-11-27 22:32:30 -08003564 if (err < 0)
3565 return err;
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003566 data = tbs->attr;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003567 }
Jakub Kicinski420d0312018-11-27 22:32:30 -08003568 if (ops->validate) {
3569 err = ops->validate(tb, data, extack);
3570 if (err < 0)
3571 return err;
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01003572 }
Jakub Kicinski420d0312018-11-27 22:32:30 -08003573 }
Jiri Pirkoba7d49b2014-01-22 09:05:55 +01003574
Jakub Kicinski420d0312018-11-27 22:32:30 -08003575 slave_data = NULL;
3576 if (m_ops) {
3577 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3578 return -EINVAL;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003579
Jakub Kicinski420d0312018-11-27 22:32:30 -08003580 if (m_ops->slave_maxtype &&
3581 linkinfo[IFLA_INFO_SLAVE_DATA]) {
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003582 err = nla_parse_nested_deprecated(tbs->slave_attr,
Johannes Berg8cb08172019-04-26 14:07:28 +02003583 m_ops->slave_maxtype,
3584 linkinfo[IFLA_INFO_SLAVE_DATA],
3585 m_ops->slave_policy,
3586 extack);
Jakub Kicinski420d0312018-11-27 22:32:30 -08003587 if (err < 0)
3588 return err;
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003589 slave_data = tbs->slave_attr;
Jakub Kicinski420d0312018-11-27 22:32:30 -08003590 }
3591 }
3592
3593 if (dev) {
3594 int status = 0;
3595
3596 if (nlh->nlmsg_flags & NLM_F_EXCL)
3597 return -EEXIST;
3598 if (nlh->nlmsg_flags & NLM_F_REPLACE)
3599 return -EOPNOTSUPP;
3600
3601 if (linkinfo[IFLA_INFO_DATA]) {
3602 if (!ops || ops != dev->rtnl_link_ops ||
3603 !ops->changelink)
Patrick McHardy38f7b872007-06-13 12:03:51 -07003604 return -EOPNOTSUPP;
3605
Jakub Kicinski420d0312018-11-27 22:32:30 -08003606 err = ops->changelink(dev, tb, data, extack);
3607 if (err < 0)
3608 return err;
3609 status |= DO_SETLINK_NOTIFY;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003610 }
3611
Jakub Kicinski420d0312018-11-27 22:32:30 -08003612 if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3613 if (!m_ops || !m_ops->slave_changelink)
3614 return -EOPNOTSUPP;
3615
3616 err = m_ops->slave_changelink(master_dev, dev, tb,
3617 slave_data, extack);
3618 if (err < 0)
3619 return err;
3620 status |= DO_SETLINK_NOTIFY;
3621 }
3622
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003623 return do_setlink(skb, dev, ifm, extack, tb, status);
Jakub Kicinski420d0312018-11-27 22:32:30 -08003624 }
3625
3626 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
Florent Fourcotef2a7c92022-04-15 18:53:27 +02003627 /* No dev found and NLM_F_CREATE not set. Requested dev does not exist,
3628 * or it's for a group
3629 */
3630 if (link_specified)
3631 return -ENODEV;
3632 if (tb[IFLA_GROUP])
Jakub Kicinski420d0312018-11-27 22:32:30 -08003633 return rtnl_group_changelink(skb, net,
Patrick McHardyffa934f2011-01-20 03:00:42 +00003634 nla_get_u32(tb[IFLA_GROUP]),
Jakub Kicinskiddf9f972017-04-30 21:46:46 -07003635 ifm, extack, tb);
Florent Fourcot6f37c9f92022-04-19 14:51:51 +02003636 return -ENODEV;
Jakub Kicinski420d0312018-11-27 22:32:30 -08003637 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07003638
Jakub Kicinski420d0312018-11-27 22:32:30 -08003639 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3640 return -EOPNOTSUPP;
Patrick McHardy38f7b872007-06-13 12:03:51 -07003641
Jakub Kicinski420d0312018-11-27 22:32:30 -08003642 if (!ops) {
Johannes Berg95a5afc2008-10-16 15:24:51 -07003643#ifdef CONFIG_MODULES
Jakub Kicinski420d0312018-11-27 22:32:30 -08003644 if (kind[0]) {
3645 __rtnl_unlock();
3646 request_module("rtnl-link-%s", kind);
3647 rtnl_lock();
3648 ops = rtnl_link_ops_get(kind);
3649 if (ops)
3650 goto replay;
3651 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07003652#endif
Jakub Kicinski420d0312018-11-27 22:32:30 -08003653 NL_SET_ERR_MSG(extack, "Unknown device type");
3654 return -EOPNOTSUPP;
3655 }
Patrick McHardy38f7b872007-06-13 12:03:51 -07003656
Hangbin Liud88e1362022-10-28 04:42:23 -04003657 return rtnl_newlink_create(skb, ifm, ops, nlh, tb, data, extack);
Jakub Kicinski63105e82022-04-29 16:55:07 -07003658}
3659
Jakub Kicinskia2939742018-11-27 22:32:31 -08003660static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3661 struct netlink_ext_ack *extack)
3662{
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003663 struct rtnl_newlink_tbs *tbs;
Jakub Kicinskia2939742018-11-27 22:32:31 -08003664 int ret;
3665
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003666 tbs = kmalloc(sizeof(*tbs), GFP_KERNEL);
3667 if (!tbs)
Jakub Kicinskia2939742018-11-27 22:32:31 -08003668 return -ENOMEM;
3669
Jakub Kicinskic92bf262022-04-29 16:55:06 -07003670 ret = __rtnl_newlink(skb, nlh, tbs, extack);
3671 kfree(tbs);
Jakub Kicinskia2939742018-11-27 22:32:31 -08003672 return ret;
3673}
3674
Jakub Kicinski9b3757b2019-01-18 10:46:16 -08003675static int rtnl_valid_getlink_req(struct sk_buff *skb,
3676 const struct nlmsghdr *nlh,
3677 struct nlattr **tb,
3678 struct netlink_ext_ack *extack)
3679{
3680 struct ifinfomsg *ifm;
3681 int i, err;
3682
3683 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3684 NL_SET_ERR_MSG(extack, "Invalid header for get link");
3685 return -EINVAL;
3686 }
3687
3688 if (!netlink_strict_get_check(skb))
Johannes Berg8cb08172019-04-26 14:07:28 +02003689 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3690 ifla_policy, extack);
Jakub Kicinski9b3757b2019-01-18 10:46:16 -08003691
3692 ifm = nlmsg_data(nlh);
3693 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3694 ifm->ifi_change) {
3695 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3696 return -EINVAL;
3697 }
3698
Johannes Berg8cb08172019-04-26 14:07:28 +02003699 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3700 ifla_policy, extack);
Jakub Kicinski9b3757b2019-01-18 10:46:16 -08003701 if (err)
3702 return err;
3703
3704 for (i = 0; i <= IFLA_MAX; i++) {
3705 if (!tb[i])
3706 continue;
3707
3708 switch (i) {
3709 case IFLA_IFNAME:
Jiri Pirko76c9ac02019-09-30 11:48:20 +02003710 case IFLA_ALT_IFNAME:
Jakub Kicinski9b3757b2019-01-18 10:46:16 -08003711 case IFLA_EXT_MASK:
3712 case IFLA_TARGET_NETNSID:
3713 break;
3714 default:
3715 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3716 return -EINVAL;
3717 }
3718 }
3719
3720 return 0;
3721}
3722
David Ahernc21ef3e2017-04-16 09:48:24 -07003723static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3724 struct netlink_ext_ack *extack)
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08003725{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09003726 struct net *net = sock_net(skb->sk);
Jiri Benc79e1ad12017-11-02 17:04:38 -02003727 struct net *tgt_net = net;
Thomas Grafb60c5112006-08-04 23:05:34 -07003728 struct ifinfomsg *ifm;
3729 struct nlattr *tb[IFLA_MAX+1];
3730 struct net_device *dev = NULL;
3731 struct sk_buff *nskb;
Jiri Benc79e1ad12017-11-02 17:04:38 -02003732 int netnsid = -1;
Thomas Graf339bf982006-11-10 14:10:15 -08003733 int err;
Greg Rose115c9b82012-02-21 16:54:48 -05003734 u32 ext_filter_mask = 0;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08003735
Jakub Kicinski9b3757b2019-01-18 10:46:16 -08003736 err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
Thomas Grafb60c5112006-08-04 23:05:34 -07003737 if (err < 0)
Eric Sesterhenn9918f232006-09-26 23:26:38 -07003738 return err;
Thomas Grafb60c5112006-08-04 23:05:34 -07003739
Christian Brauner4ff66ca2018-02-07 13:53:20 +01003740 err = rtnl_ensure_unique_netns(tb, extack, true);
3741 if (err < 0)
3742 return err;
3743
Christian Brauner7e4a8d52018-09-04 21:53:53 +02003744 if (tb[IFLA_TARGET_NETNSID]) {
3745 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
Christian Braunerc383edc2018-09-04 21:53:47 +02003746 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
Jiri Benc79e1ad12017-11-02 17:04:38 -02003747 if (IS_ERR(tgt_net))
3748 return PTR_ERR(tgt_net);
3749 }
3750
Greg Rose115c9b82012-02-21 16:54:48 -05003751 if (tb[IFLA_EXT_MASK])
3752 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3753
Jiri Benc79e1ad12017-11-02 17:04:38 -02003754 err = -EINVAL;
Thomas Grafb60c5112006-08-04 23:05:34 -07003755 ifm = nlmsg_data(nlh);
Eric Dumazeta3d12892009-10-21 10:59:31 +00003756 if (ifm->ifi_index > 0)
Jiri Benc79e1ad12017-11-02 17:04:38 -02003757 dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
Jiri Pirko76c9ac02019-09-30 11:48:20 +02003758 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003759 dev = rtnl_dev_get(tgt_net, tb);
Eric Dumazeta3d12892009-10-21 10:59:31 +00003760 else
Jiri Benc79e1ad12017-11-02 17:04:38 -02003761 goto out;
Thomas Grafb60c5112006-08-04 23:05:34 -07003762
Jiri Benc79e1ad12017-11-02 17:04:38 -02003763 err = -ENODEV;
Eric Dumazeta3d12892009-10-21 10:59:31 +00003764 if (dev == NULL)
Jiri Benc79e1ad12017-11-02 17:04:38 -02003765 goto out;
Eric Dumazeta3d12892009-10-21 10:59:31 +00003766
Jiri Benc79e1ad12017-11-02 17:04:38 -02003767 err = -ENOBUFS;
Greg Rose115c9b82012-02-21 16:54:48 -05003768 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
Eric Dumazeta3d12892009-10-21 10:59:31 +00003769 if (nskb == NULL)
Jiri Benc79e1ad12017-11-02 17:04:38 -02003770 goto out;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08003771
Jiri Benc79e1ad12017-11-02 17:04:38 -02003772 err = rtnl_fill_ifinfo(nskb, dev, net,
3773 RTM_NEWLINK, NETLINK_CB(skb).portid,
3774 nlh->nlmsg_seq, 0, 0, ext_filter_mask,
Guillaume Naultd4e4fdf2019-10-23 18:39:04 +02003775 0, NULL, 0, netnsid, GFP_KERNEL);
Patrick McHardy26932562007-01-31 23:16:40 -08003776 if (err < 0) {
3777 /* -EMSGSIZE implies BUG in if_nlmsg_size */
3778 WARN_ON(err == -EMSGSIZE);
3779 kfree_skb(nskb);
Eric Dumazeta3d12892009-10-21 10:59:31 +00003780 } else
Eric W. Biederman15e47302012-09-07 20:12:54 +00003781 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
Jiri Benc79e1ad12017-11-02 17:04:38 -02003782out:
3783 if (netnsid >= 0)
3784 put_net(tgt_net);
Thomas Grafb60c5112006-08-04 23:05:34 -07003785
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08003786 return err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08003787}
Jean Tourrilhes711e2c32006-02-22 15:10:56 -08003788
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003789static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3790 bool *changed, struct netlink_ext_ack *extack)
3791{
3792 char *alt_ifname;
Jakub Kicinski155fb432022-03-09 10:29:14 -08003793 size_t size;
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003794 int err;
3795
3796 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3797 if (err)
3798 return err;
3799
Jakub Kicinski155fb432022-03-09 10:29:14 -08003800 if (cmd == RTM_NEWLINKPROP) {
3801 size = rtnl_prop_list_size(dev);
3802 size += nla_total_size(ALTIFNAMSIZ);
3803 if (size >= U16_MAX) {
3804 NL_SET_ERR_MSG(extack,
3805 "effective property list too long");
3806 return -EINVAL;
3807 }
3808 }
3809
Jakub Kicinski5d26cff2022-03-09 10:29:13 -08003810 alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
Eric Dumazet44bfa9c2020-02-12 20:58:26 -08003811 if (!alt_ifname)
3812 return -ENOMEM;
3813
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003814 if (cmd == RTM_NEWLINKPROP) {
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003815 err = netdev_name_node_alt_create(dev, alt_ifname);
Eric Dumazet44bfa9c2020-02-12 20:58:26 -08003816 if (!err)
3817 alt_ifname = NULL;
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003818 } else if (cmd == RTM_DELLINKPROP) {
3819 err = netdev_name_node_alt_destroy(dev, alt_ifname);
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003820 } else {
Eric Dumazet44bfa9c2020-02-12 20:58:26 -08003821 WARN_ON_ONCE(1);
3822 err = -EINVAL;
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003823 }
3824
Eric Dumazet44bfa9c2020-02-12 20:58:26 -08003825 kfree(alt_ifname);
3826 if (!err)
3827 *changed = true;
3828 return err;
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003829}
3830
3831static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3832 struct netlink_ext_ack *extack)
3833{
3834 struct net *net = sock_net(skb->sk);
3835 struct nlattr *tb[IFLA_MAX + 1];
3836 struct net_device *dev;
3837 struct ifinfomsg *ifm;
3838 bool changed = false;
3839 struct nlattr *attr;
3840 int err, rem;
3841
3842 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3843 if (err)
3844 return err;
3845
3846 err = rtnl_ensure_unique_netns(tb, extack, true);
3847 if (err)
3848 return err;
3849
3850 ifm = nlmsg_data(nlh);
Jiri Pirkocc6090e2019-09-30 11:48:19 +02003851 if (ifm->ifi_index > 0)
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003852 dev = __dev_get_by_index(net, ifm->ifi_index);
Jiri Pirko76c9ac02019-09-30 11:48:20 +02003853 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
Florent Fourcot5ea08b52022-04-15 18:53:28 +02003854 dev = rtnl_dev_get(net, tb);
Jiri Pirkocc6090e2019-09-30 11:48:19 +02003855 else
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003856 return -EINVAL;
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02003857
3858 if (!dev)
3859 return -ENODEV;
3860
3861 if (!tb[IFLA_PROP_LIST])
3862 return 0;
3863
3864 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3865 switch (nla_type(attr)) {
3866 case IFLA_ALT_IFNAME:
3867 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3868 if (err)
3869 return err;
3870 break;
3871 }
3872 }
3873
3874 if (changed)
3875 netdev_state_change(dev);
3876 return 0;
3877}
3878
3879static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3880 struct netlink_ext_ack *extack)
3881{
3882 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3883}
3884
3885static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3886 struct netlink_ext_ack *extack)
3887{
3888 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3889}
3890
Di Zhuebfe3c52020-10-21 10:00:53 +08003891static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
Greg Rosec7ac8672011-06-10 01:27:09 +00003892{
Greg Rose115c9b82012-02-21 16:54:48 -05003893 struct net *net = sock_net(skb->sk);
Di Zhuebfe3c52020-10-21 10:00:53 +08003894 size_t min_ifinfo_dump_size = 0;
Greg Rose115c9b82012-02-21 16:54:48 -05003895 struct nlattr *tb[IFLA_MAX+1];
3896 u32 ext_filter_mask = 0;
Di Zhuebfe3c52020-10-21 10:00:53 +08003897 struct net_device *dev;
Michal Schmidte5eca6d2014-05-28 14:15:19 +02003898 int hdrlen;
Greg Rose115c9b82012-02-21 16:54:48 -05003899
Michal Schmidte5eca6d2014-05-28 14:15:19 +02003900 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3901 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3902 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3903
Johannes Berg8cb08172019-04-26 14:07:28 +02003904 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
Eric Dumazeta4b64fb2012-03-04 12:32:10 +00003905 if (tb[IFLA_EXT_MASK])
3906 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3907 }
Greg Rose115c9b82012-02-21 16:54:48 -05003908
3909 if (!ext_filter_mask)
3910 return NLMSG_GOODSIZE;
3911 /*
3912 * traverse the list of net devices and compute the minimum
3913 * buffer size based upon the filter mask.
3914 */
Florian Westphal6853dd42017-08-09 20:41:51 +02003915 rcu_read_lock();
3916 for_each_netdev_rcu(net, dev) {
Di Zhuebfe3c52020-10-21 10:00:53 +08003917 min_ifinfo_dump_size = max(min_ifinfo_dump_size,
3918 if_nlmsg_size(dev, ext_filter_mask));
Greg Rose115c9b82012-02-21 16:54:48 -05003919 }
Florian Westphal6853dd42017-08-09 20:41:51 +02003920 rcu_read_unlock();
Greg Rose115c9b82012-02-21 16:54:48 -05003921
Zhang Shengju93af2052016-11-22 14:14:28 +08003922 return nlmsg_total_size(min_ifinfo_dump_size);
Greg Rosec7ac8672011-06-10 01:27:09 +00003923}
3924
Adrian Bunk42bad1d2007-04-26 00:57:41 -07003925static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003926{
3927 int idx;
3928 int s_idx = cb->family;
Christian Brauner87ccbb12018-09-04 21:53:51 +02003929 int type = cb->nlh->nlmsg_type - RTM_BASE;
David Ahernc63586d2018-10-24 12:59:02 -07003930 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003931
3932 if (s_idx == 0)
3933 s_idx = 1;
Florian Westphal6853dd42017-08-09 20:41:51 +02003934
Patrick McHardy25239ce2010-04-26 16:02:05 +02003935 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
Jakub Kicinski51e13682020-12-09 18:16:08 -08003936 struct rtnl_link __rcu **tab;
Florian Westphaladdf9b92017-12-02 21:44:05 +01003937 struct rtnl_link *link;
Florian Westphal6853dd42017-08-09 20:41:51 +02003938 rtnl_dumpit_func dumpit;
3939
Linus Torvalds1da177e2005-04-16 15:20:36 -07003940 if (idx < s_idx || idx == PF_PACKET)
3941 continue;
Florian Westphal6853dd42017-08-09 20:41:51 +02003942
Florian Westphaladdf9b92017-12-02 21:44:05 +01003943 if (type < 0 || type >= RTM_NR_MSGTYPES)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003944 continue;
Florian Westphal6853dd42017-08-09 20:41:51 +02003945
Florian Westphaladdf9b92017-12-02 21:44:05 +01003946 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3947 if (!tab)
3948 continue;
3949
Jakub Kicinski51e13682020-12-09 18:16:08 -08003950 link = rcu_dereference_rtnl(tab[type]);
Florian Westphaladdf9b92017-12-02 21:44:05 +01003951 if (!link)
3952 continue;
3953
3954 dumpit = link->dumpit;
Florian Westphal6853dd42017-08-09 20:41:51 +02003955 if (!dumpit)
3956 continue;
3957
Nicolas Dichtel04652772013-03-22 06:28:42 +00003958 if (idx > s_idx) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003959 memset(&cb->args[0], 0, sizeof(cb->args));
Nicolas Dichtel04652772013-03-22 06:28:42 +00003960 cb->prev_seq = 0;
3961 cb->seq = 0;
3962 }
David Ahernc63586d2018-10-24 12:59:02 -07003963 ret = dumpit(skb, cb);
Alexey Kodanev5e1acb42018-11-02 19:11:04 +03003964 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003965 break;
3966 }
3967 cb->family = idx;
3968
David Ahernc63586d2018-10-24 12:59:02 -07003969 return skb->len ? : ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003970}
3971
Mahesh Bandewar395eea62014-12-03 13:46:24 -08003972struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04003973 unsigned int change,
Nicolas Dichtel38e01b32018-01-25 15:01:39 +01003974 u32 event, gfp_t flags, int *new_nsid,
Hangbin Liu1d997f12022-10-28 04:42:21 -04003975 int new_ifindex, u32 portid, u32 seq)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003976{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09003977 struct net *net = dev_net(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003978 struct sk_buff *skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07003979 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003980
luo penghao50af5962021-10-21 06:40:20 +00003981 skb = nlmsg_new(if_nlmsg_size(dev, 0), flags);
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07003982 if (skb == NULL)
3983 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003984
Jiri Benc79e1ad12017-11-02 17:04:38 -02003985 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
Hangbin Liu1d997f12022-10-28 04:42:21 -04003986 type, portid, seq, change, 0, 0, event,
Guillaume Naultd4e4fdf2019-10-23 18:39:04 +02003987 new_nsid, new_ifindex, -1, flags);
Patrick McHardy26932562007-01-31 23:16:40 -08003988 if (err < 0) {
3989 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3990 WARN_ON(err == -EMSGSIZE);
3991 kfree_skb(skb);
3992 goto errout;
3993 }
Mahesh Bandewar395eea62014-12-03 13:46:24 -08003994 return skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -07003995errout:
3996 if (err < 0)
Eric W. Biederman4b3da702007-11-19 22:27:40 -08003997 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
Mahesh Bandewar395eea62014-12-03 13:46:24 -08003998 return NULL;
3999}
4000
Hangbin Liu1d997f12022-10-28 04:42:21 -04004001void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags,
4002 u32 portid, const struct nlmsghdr *nlh)
Mahesh Bandewar395eea62014-12-03 13:46:24 -08004003{
4004 struct net *net = dev_net(dev);
4005
Hangbin Liu1d997f12022-10-28 04:42:21 -04004006 rtnl_notify(skb, net, portid, RTNLGRP_LINK, nlh, flags);
Mahesh Bandewar395eea62014-12-03 13:46:24 -08004007}
4008
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04004009static void rtmsg_ifinfo_event(int type, struct net_device *dev,
4010 unsigned int change, u32 event,
Hangbin Liu1d997f12022-10-28 04:42:21 -04004011 gfp_t flags, int *new_nsid, int new_ifindex,
4012 u32 portid, const struct nlmsghdr *nlh)
Mahesh Bandewar395eea62014-12-03 13:46:24 -08004013{
4014 struct sk_buff *skb;
4015
Nicolas Dichteled2a80a2015-05-13 14:19:42 +02004016 if (dev->reg_state != NETREG_REGISTERED)
4017 return;
4018
Nicolas Dichtel38e01b32018-01-25 15:01:39 +01004019 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
Hangbin Liu1d997f12022-10-28 04:42:21 -04004020 new_ifindex, portid, nlmsg_seq(nlh));
Mahesh Bandewar395eea62014-12-03 13:46:24 -08004021 if (skb)
Hangbin Liu1d997f12022-10-28 04:42:21 -04004022 rtmsg_ifinfo_send(skb, dev, flags, portid, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004023}
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04004024
4025void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
Hangbin Liu1d997f12022-10-28 04:42:21 -04004026 gfp_t flags, u32 portid, const struct nlmsghdr *nlh)
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04004027{
Nicolas Dichtel38e01b32018-01-25 15:01:39 +01004028 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
Hangbin Liu1d997f12022-10-28 04:42:21 -04004029 NULL, 0, portid, nlh);
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04004030}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004031
Nicolas Dichtel6621dd22017-10-03 13:53:23 +02004032void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
Nicolas Dichtel38e01b32018-01-25 15:01:39 +01004033 gfp_t flags, int *new_nsid, int new_ifindex)
Nicolas Dichtel6621dd22017-10-03 13:53:23 +02004034{
4035 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
Hangbin Liu1d997f12022-10-28 04:42:21 -04004036 new_nsid, new_ifindex, 0, NULL);
Nicolas Dichtel6621dd22017-10-03 13:53:23 +02004037}
4038
John Fastabendd83b0602012-04-15 06:44:08 +00004039static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
4040 struct net_device *dev,
Hubert Sokolowski1e53d5b2015-04-09 12:16:17 +00004041 u8 *addr, u16 vid, u32 pid, u32 seq,
Nicolas Dichtel1c104a62014-03-19 17:47:49 +01004042 int type, unsigned int flags,
Hubert Sokolowskib3379042015-12-15 13:20:30 +00004043 int nlflags, u16 ndm_state)
John Fastabendd83b0602012-04-15 06:44:08 +00004044{
4045 struct nlmsghdr *nlh;
4046 struct ndmsg *ndm;
4047
Nicolas Dichtel1c104a62014-03-19 17:47:49 +01004048 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
John Fastabendd83b0602012-04-15 06:44:08 +00004049 if (!nlh)
4050 return -EMSGSIZE;
4051
4052 ndm = nlmsg_data(nlh);
4053 ndm->ndm_family = AF_BRIDGE;
4054 ndm->ndm_pad1 = 0;
4055 ndm->ndm_pad2 = 0;
4056 ndm->ndm_flags = flags;
4057 ndm->ndm_type = 0;
4058 ndm->ndm_ifindex = dev->ifindex;
Hubert Sokolowskib3379042015-12-15 13:20:30 +00004059 ndm->ndm_state = ndm_state;
John Fastabendd83b0602012-04-15 06:44:08 +00004060
4061 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
4062 goto nla_put_failure;
Hubert Sokolowski1e53d5b2015-04-09 12:16:17 +00004063 if (vid)
4064 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
4065 goto nla_put_failure;
John Fastabendd83b0602012-04-15 06:44:08 +00004066
Johannes Berg053c0952015-01-16 22:09:00 +01004067 nlmsg_end(skb, nlh);
4068 return 0;
John Fastabendd83b0602012-04-15 06:44:08 +00004069
4070nla_put_failure:
4071 nlmsg_cancel(skb, nlh);
4072 return -EMSGSIZE;
4073}
4074
John Fastabend3ff661c2012-04-15 06:44:14 +00004075static inline size_t rtnl_fdb_nlmsg_size(void)
4076{
Sabrina Dubrocaf82ef3e2016-11-18 15:50:39 +01004077 return NLMSG_ALIGN(sizeof(struct ndmsg)) +
4078 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
4079 nla_total_size(sizeof(u16)) + /* NDA_VLAN */
4080 0;
John Fastabend3ff661c2012-04-15 06:44:14 +00004081}
4082
Hubert Sokolowskib3379042015-12-15 13:20:30 +00004083static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
4084 u16 ndm_state)
John Fastabend3ff661c2012-04-15 06:44:14 +00004085{
4086 struct net *net = dev_net(dev);
4087 struct sk_buff *skb;
4088 int err = -ENOBUFS;
4089
4090 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
4091 if (!skb)
4092 goto errout;
4093
Hubert Sokolowski1e53d5b2015-04-09 12:16:17 +00004094 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
Hubert Sokolowskib3379042015-12-15 13:20:30 +00004095 0, 0, type, NTF_SELF, 0, ndm_state);
John Fastabend3ff661c2012-04-15 06:44:14 +00004096 if (err < 0) {
4097 kfree_skb(skb);
4098 goto errout;
4099 }
4100
4101 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
4102 return;
4103errout:
4104 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
4105}
4106
Bart Van Asschea9869672019-03-25 09:17:22 -07004107/*
Vlad Yasevich090096b2013-03-06 15:39:42 +00004108 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
4109 */
4110int ndo_dflt_fdb_add(struct ndmsg *ndm,
4111 struct nlattr *tb[],
4112 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +01004113 const unsigned char *addr, u16 vid,
Vlad Yasevich090096b2013-03-06 15:39:42 +00004114 u16 flags)
4115{
4116 int err = -EINVAL;
4117
4118 /* If aging addresses are supported device will need to
4119 * implement its own handler for this.
4120 */
4121 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
Vladimir Oltean78ecc892021-06-29 03:29:26 +03004122 netdev_info(dev, "default FDB implementation only supports local addresses\n");
Vlad Yasevich090096b2013-03-06 15:39:42 +00004123 return err;
4124 }
4125
Hans J. Schultza35ec8e32022-11-01 21:39:21 +02004126 if (tb[NDA_FLAGS_EXT]) {
4127 netdev_info(dev, "invalid flags given to default FDB implementation\n");
4128 return err;
4129 }
4130
Or Gerlitz65891fe2014-12-14 18:19:05 +02004131 if (vid) {
Vladimir Oltean23ac0b42021-06-29 03:29:25 +03004132 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n");
Or Gerlitz65891fe2014-12-14 18:19:05 +02004133 return err;
4134 }
4135
Vlad Yasevich090096b2013-03-06 15:39:42 +00004136 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4137 err = dev_uc_add_excl(dev, addr);
4138 else if (is_multicast_ether_addr(addr))
4139 err = dev_mc_add_excl(dev, addr);
4140
4141 /* Only return duplicate errors if NLM_F_EXCL is set */
4142 if (err == -EEXIST && !(flags & NLM_F_EXCL))
4143 err = 0;
4144
4145 return err;
4146}
4147EXPORT_SYMBOL(ndo_dflt_fdb_add);
4148
Florian Westphalb88d12e2017-10-10 17:10:04 +02004149static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
4150 struct netlink_ext_ack *extack)
Jiri Pirkof6f64242014-11-28 14:34:15 +01004151{
4152 u16 vid = 0;
4153
4154 if (vlan_attr) {
4155 if (nla_len(vlan_attr) != sizeof(u16)) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02004156 NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
Jiri Pirkof6f64242014-11-28 14:34:15 +01004157 return -EINVAL;
4158 }
4159
4160 vid = nla_get_u16(vlan_attr);
4161
4162 if (!vid || vid >= VLAN_VID_MASK) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02004163 NL_SET_ERR_MSG(extack, "invalid vlan id");
Jiri Pirkof6f64242014-11-28 14:34:15 +01004164 return -EINVAL;
4165 }
4166 }
4167 *p_vid = vid;
4168 return 0;
4169}
4170
David Ahernc21ef3e2017-04-16 09:48:24 -07004171static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
4172 struct netlink_ext_ack *extack)
John Fastabend77162022012-04-15 06:43:56 +00004173{
4174 struct net *net = sock_net(skb->sk);
John Fastabend77162022012-04-15 06:43:56 +00004175 struct ndmsg *ndm;
4176 struct nlattr *tb[NDA_MAX+1];
4177 struct net_device *dev;
4178 u8 *addr;
Jiri Pirkof6f64242014-11-28 14:34:15 +01004179 u16 vid;
John Fastabend77162022012-04-15 06:43:56 +00004180 int err;
4181
Johannes Berg8cb08172019-04-26 14:07:28 +02004182 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4183 extack);
John Fastabend77162022012-04-15 06:43:56 +00004184 if (err < 0)
4185 return err;
4186
4187 ndm = nlmsg_data(nlh);
4188 if (ndm->ndm_ifindex == 0) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02004189 NL_SET_ERR_MSG(extack, "invalid ifindex");
John Fastabend77162022012-04-15 06:43:56 +00004190 return -EINVAL;
4191 }
4192
4193 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4194 if (dev == NULL) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02004195 NL_SET_ERR_MSG(extack, "unknown ifindex");
John Fastabend77162022012-04-15 06:43:56 +00004196 return -ENODEV;
4197 }
4198
4199 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02004200 NL_SET_ERR_MSG(extack, "invalid address");
John Fastabend77162022012-04-15 06:43:56 +00004201 return -EINVAL;
4202 }
4203
Ido Schimmelda715772018-10-29 20:36:43 +00004204 if (dev->type != ARPHRD_ETHER) {
4205 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4206 return -EINVAL;
4207 }
4208
John Fastabend77162022012-04-15 06:43:56 +00004209 addr = nla_data(tb[NDA_LLADDR]);
John Fastabend77162022012-04-15 06:43:56 +00004210
Florian Westphalb88d12e2017-10-10 17:10:04 +02004211 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
Jiri Pirkof6f64242014-11-28 14:34:15 +01004212 if (err)
4213 return err;
4214
John Fastabend77162022012-04-15 06:43:56 +00004215 err = -EOPNOTSUPP;
4216
4217 /* Support fdb on master device the net/bridge default case */
4218 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
Julian Wiedmann2e92a2d2020-02-20 09:00:07 +01004219 netif_is_bridge_port(dev)) {
Jiri Pirko898e5062013-01-03 22:48:52 +00004220 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4221 const struct net_device_ops *ops = br_dev->netdev_ops;
4222
Jiri Pirkof6f64242014-11-28 14:34:15 +01004223 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
Petr Machata87b09842019-01-16 23:06:50 +00004224 nlh->nlmsg_flags, extack);
John Fastabend77162022012-04-15 06:43:56 +00004225 if (err)
4226 goto out;
4227 else
4228 ndm->ndm_flags &= ~NTF_MASTER;
4229 }
4230
4231 /* Embedded bridge, macvlan, and any other device support */
Vlad Yasevich090096b2013-03-06 15:39:42 +00004232 if ((ndm->ndm_flags & NTF_SELF)) {
4233 if (dev->netdev_ops->ndo_fdb_add)
4234 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
Jiri Pirkof6f64242014-11-28 14:34:15 +01004235 vid,
Petr Machata87b09842019-01-16 23:06:50 +00004236 nlh->nlmsg_flags,
4237 extack);
Vlad Yasevich090096b2013-03-06 15:39:42 +00004238 else
Jiri Pirkof6f64242014-11-28 14:34:15 +01004239 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
Vlad Yasevich090096b2013-03-06 15:39:42 +00004240 nlh->nlmsg_flags);
John Fastabend77162022012-04-15 06:43:56 +00004241
John Fastabend3ff661c2012-04-15 06:44:14 +00004242 if (!err) {
Hubert Sokolowskib3379042015-12-15 13:20:30 +00004243 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4244 ndm->ndm_state);
John Fastabend77162022012-04-15 06:43:56 +00004245 ndm->ndm_flags &= ~NTF_SELF;
John Fastabend3ff661c2012-04-15 06:44:14 +00004246 }
John Fastabend77162022012-04-15 06:43:56 +00004247 }
4248out:
4249 return err;
4250}
4251
Bart Van Asschea9869672019-03-25 09:17:22 -07004252/*
Vlad Yasevich090096b2013-03-06 15:39:42 +00004253 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4254 */
4255int ndo_dflt_fdb_del(struct ndmsg *ndm,
4256 struct nlattr *tb[],
4257 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +01004258 const unsigned char *addr, u16 vid)
Vlad Yasevich090096b2013-03-06 15:39:42 +00004259{
Alexander Duyckc8a89c42014-07-15 15:15:20 -07004260 int err = -EINVAL;
Vlad Yasevich090096b2013-03-06 15:39:42 +00004261
4262 /* If aging addresses are supported device will need to
4263 * implement its own handler for this.
4264 */
Sridhar Samudrala64535992013-08-08 15:19:48 -07004265 if (!(ndm->ndm_state & NUD_PERMANENT)) {
Vladimir Oltean78ecc892021-06-29 03:29:26 +03004266 netdev_info(dev, "default FDB implementation only supports local addresses\n");
Alexander Duyckc8a89c42014-07-15 15:15:20 -07004267 return err;
Vlad Yasevich090096b2013-03-06 15:39:42 +00004268 }
4269
4270 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4271 err = dev_uc_del(dev, addr);
4272 else if (is_multicast_ether_addr(addr))
4273 err = dev_mc_del(dev, addr);
Vlad Yasevich090096b2013-03-06 15:39:42 +00004274
4275 return err;
4276}
4277EXPORT_SYMBOL(ndo_dflt_fdb_del);
4278
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004279static const struct nla_policy fdb_del_bulk_policy[NDA_MAX + 1] = {
4280 [NDA_VLAN] = { .type = NLA_U16 },
4281 [NDA_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
Nikolay Aleksandrovea2c0f92022-04-13 13:52:00 +03004282 [NDA_NDM_STATE_MASK] = { .type = NLA_U16 },
4283 [NDA_NDM_FLAGS_MASK] = { .type = NLA_U8 },
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004284};
4285
David Ahernc21ef3e2017-04-16 09:48:24 -07004286static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4287 struct netlink_ext_ack *extack)
John Fastabend77162022012-04-15 06:43:56 +00004288{
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004289 bool del_bulk = !!(nlh->nlmsg_flags & NLM_F_BULK);
John Fastabend77162022012-04-15 06:43:56 +00004290 struct net *net = sock_net(skb->sk);
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004291 const struct net_device_ops *ops;
John Fastabend77162022012-04-15 06:43:56 +00004292 struct ndmsg *ndm;
Vlad Yasevich1690be62013-02-13 12:00:18 +00004293 struct nlattr *tb[NDA_MAX+1];
John Fastabend77162022012-04-15 06:43:56 +00004294 struct net_device *dev;
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004295 __u8 *addr = NULL;
Colin Ian King7d311802020-04-25 12:28:14 +01004296 int err;
Jiri Pirkof6f64242014-11-28 14:34:15 +01004297 u16 vid;
John Fastabend77162022012-04-15 06:43:56 +00004298
Eric W. Biederman90f62cf32014-04-23 14:29:27 -07004299 if (!netlink_capable(skb, CAP_NET_ADMIN))
Vlad Yasevich1690be62013-02-13 12:00:18 +00004300 return -EPERM;
4301
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004302 if (!del_bulk) {
4303 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX,
4304 NULL, extack);
4305 } else {
4306 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX,
4307 fdb_del_bulk_policy, extack);
4308 }
Vlad Yasevich1690be62013-02-13 12:00:18 +00004309 if (err < 0)
4310 return err;
John Fastabend77162022012-04-15 06:43:56 +00004311
4312 ndm = nlmsg_data(nlh);
4313 if (ndm->ndm_ifindex == 0) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02004314 NL_SET_ERR_MSG(extack, "invalid ifindex");
John Fastabend77162022012-04-15 06:43:56 +00004315 return -EINVAL;
4316 }
4317
4318 dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4319 if (dev == NULL) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02004320 NL_SET_ERR_MSG(extack, "unknown ifindex");
John Fastabend77162022012-04-15 06:43:56 +00004321 return -ENODEV;
4322 }
4323
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004324 if (!del_bulk) {
4325 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4326 NL_SET_ERR_MSG(extack, "invalid address");
4327 return -EINVAL;
4328 }
4329 addr = nla_data(tb[NDA_LLADDR]);
John Fastabend77162022012-04-15 06:43:56 +00004330 }
4331
Ido Schimmelda715772018-10-29 20:36:43 +00004332 if (dev->type != ARPHRD_ETHER) {
4333 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4334 return -EINVAL;
4335 }
4336
Florian Westphalb88d12e2017-10-10 17:10:04 +02004337 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
Jiri Pirkof6f64242014-11-28 14:34:15 +01004338 if (err)
4339 return err;
4340
John Fastabend77162022012-04-15 06:43:56 +00004341 err = -EOPNOTSUPP;
4342
4343 /* Support fdb on master device the net/bridge default case */
4344 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
Julian Wiedmann2e92a2d2020-02-20 09:00:07 +01004345 netif_is_bridge_port(dev)) {
Jiri Pirko898e5062013-01-03 22:48:52 +00004346 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
John Fastabend77162022012-04-15 06:43:56 +00004347
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004348 ops = br_dev->netdev_ops;
4349 if (!del_bulk) {
4350 if (ops->ndo_fdb_del)
Alaa Mohamedca4567f2022-05-05 17:09:57 +02004351 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004352 } else {
4353 if (ops->ndo_fdb_del_bulk)
4354 err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
4355 extack);
4356 }
John Fastabend77162022012-04-15 06:43:56 +00004357
4358 if (err)
4359 goto out;
4360 else
4361 ndm->ndm_flags &= ~NTF_MASTER;
4362 }
4363
4364 /* Embedded bridge, macvlan, and any other device support */
Vlad Yasevich090096b2013-03-06 15:39:42 +00004365 if (ndm->ndm_flags & NTF_SELF) {
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004366 ops = dev->netdev_ops;
4367 if (!del_bulk) {
4368 if (ops->ndo_fdb_del)
Alaa Mohamedca4567f2022-05-05 17:09:57 +02004369 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid, extack);
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004370 else
4371 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4372 } else {
4373 /* in case err was cleared by NTF_MASTER call */
4374 err = -EOPNOTSUPP;
4375 if (ops->ndo_fdb_del_bulk)
4376 err = ops->ndo_fdb_del_bulk(ndm, tb, dev, vid,
4377 extack);
4378 }
John Fastabend77162022012-04-15 06:43:56 +00004379
John Fastabend3ff661c2012-04-15 06:44:14 +00004380 if (!err) {
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03004381 if (!del_bulk)
4382 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4383 ndm->ndm_state);
John Fastabend77162022012-04-15 06:43:56 +00004384 ndm->ndm_flags &= ~NTF_SELF;
John Fastabend3ff661c2012-04-15 06:44:14 +00004385 }
John Fastabend77162022012-04-15 06:43:56 +00004386 }
4387out:
4388 return err;
4389}
4390
John Fastabendd83b0602012-04-15 06:44:08 +00004391static int nlmsg_populate_fdb(struct sk_buff *skb,
4392 struct netlink_callback *cb,
4393 struct net_device *dev,
4394 int *idx,
4395 struct netdev_hw_addr_list *list)
4396{
4397 struct netdev_hw_addr *ha;
4398 int err;
Eric W. Biederman15e47302012-09-07 20:12:54 +00004399 u32 portid, seq;
John Fastabendd83b0602012-04-15 06:44:08 +00004400
Eric W. Biederman15e47302012-09-07 20:12:54 +00004401 portid = NETLINK_CB(cb->skb).portid;
John Fastabendd83b0602012-04-15 06:44:08 +00004402 seq = cb->nlh->nlmsg_seq;
4403
4404 list_for_each_entry(ha, &list->list, list) {
Roopa Prabhud2976532016-08-30 21:56:45 -07004405 if (*idx < cb->args[2])
John Fastabendd83b0602012-04-15 06:44:08 +00004406 goto skip;
4407
Hubert Sokolowski1e53d5b2015-04-09 12:16:17 +00004408 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
John Fastabenda7a558f2012-11-01 16:23:10 +00004409 portid, seq,
Nicolas Dichtel1c104a62014-03-19 17:47:49 +01004410 RTM_NEWNEIGH, NTF_SELF,
Hubert Sokolowskib3379042015-12-15 13:20:30 +00004411 NLM_F_MULTI, NUD_PERMANENT);
John Fastabendd83b0602012-04-15 06:44:08 +00004412 if (err < 0)
4413 return err;
4414skip:
4415 *idx += 1;
4416 }
4417 return 0;
4418}
4419
4420/**
Ben Hutchings2c530402012-07-10 10:55:09 +00004421 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
Bart Van Asschea9869672019-03-25 09:17:22 -07004422 * @skb: socket buffer to store message in
4423 * @cb: netlink callback
John Fastabendd83b0602012-04-15 06:44:08 +00004424 * @dev: netdevice
Bart Van Asschea9869672019-03-25 09:17:22 -07004425 * @filter_dev: ignored
4426 * @idx: the number of FDB table entries dumped is added to *@idx
John Fastabendd83b0602012-04-15 06:44:08 +00004427 *
4428 * Default netdevice operation to dump the existing unicast address list.
John Fastabend91f3e7b2013-03-29 08:18:37 +00004429 * Returns number of addresses from list put in skb.
John Fastabendd83b0602012-04-15 06:44:08 +00004430 */
4431int ndo_dflt_fdb_dump(struct sk_buff *skb,
4432 struct netlink_callback *cb,
4433 struct net_device *dev,
Jamal Hadi Salim5d5eacb2014-07-10 07:01:58 -04004434 struct net_device *filter_dev,
Roopa Prabhud2976532016-08-30 21:56:45 -07004435 int *idx)
John Fastabendd83b0602012-04-15 06:44:08 +00004436{
4437 int err;
4438
Eric Dumazet68883892018-12-04 09:40:35 -08004439 if (dev->type != ARPHRD_ETHER)
4440 return -EINVAL;
4441
John Fastabendd83b0602012-04-15 06:44:08 +00004442 netif_addr_lock_bh(dev);
Roopa Prabhud2976532016-08-30 21:56:45 -07004443 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
John Fastabendd83b0602012-04-15 06:44:08 +00004444 if (err)
4445 goto out;
Zhang Shengju2934c9d2016-11-30 16:37:34 +08004446 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
John Fastabendd83b0602012-04-15 06:44:08 +00004447out:
4448 netif_addr_unlock_bh(dev);
Roopa Prabhud2976532016-08-30 21:56:45 -07004449 return err;
John Fastabendd83b0602012-04-15 06:44:08 +00004450}
4451EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4452
David Ahern8c6e1372018-10-07 20:16:44 -07004453static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4454 int *br_idx, int *brport_idx,
4455 struct netlink_ext_ack *extack)
4456{
4457 struct nlattr *tb[NDA_MAX + 1];
4458 struct ndmsg *ndm;
4459 int err, i;
4460
4461 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4462 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4463 return -EINVAL;
4464 }
4465
4466 ndm = nlmsg_data(nlh);
4467 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4468 ndm->ndm_flags || ndm->ndm_type) {
Nikolay Aleksandrov8b730182019-10-29 13:59:32 +02004469 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
David Ahern8c6e1372018-10-07 20:16:44 -07004470 return -EINVAL;
4471 }
4472
Johannes Berg8cb08172019-04-26 14:07:28 +02004473 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4474 NDA_MAX, NULL, extack);
David Ahern8c6e1372018-10-07 20:16:44 -07004475 if (err < 0)
4476 return err;
4477
4478 *brport_idx = ndm->ndm_ifindex;
4479 for (i = 0; i <= NDA_MAX; ++i) {
4480 if (!tb[i])
4481 continue;
4482
4483 switch (i) {
4484 case NDA_IFINDEX:
4485 if (nla_len(tb[i]) != sizeof(u32)) {
4486 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4487 return -EINVAL;
4488 }
4489 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4490 break;
4491 case NDA_MASTER:
4492 if (nla_len(tb[i]) != sizeof(u32)) {
4493 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4494 return -EINVAL;
4495 }
4496 *br_idx = nla_get_u32(tb[NDA_MASTER]);
4497 break;
4498 default:
4499 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4500 return -EINVAL;
4501 }
4502 }
4503
4504 return 0;
4505}
4506
David Ahern8dfbda12018-10-07 20:16:43 -07004507static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4508 int *br_idx, int *brport_idx,
4509 struct netlink_ext_ack *extack)
4510{
David Ahern8dfbda12018-10-07 20:16:43 -07004511 struct nlattr *tb[IFLA_MAX+1];
4512 int err;
4513
4514 /* A hack to preserve kernel<->userspace interface.
4515 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4516 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4517 * So, check for ndmsg with an optional u32 attribute (not used here).
4518 * Fortunately these sizes don't conflict with the size of ifinfomsg
4519 * with an optional attribute.
4520 */
4521 if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4522 (nlmsg_len(nlh) != sizeof(struct ndmsg) +
4523 nla_attr_size(sizeof(u32)))) {
David Ahern4565d7e2018-10-08 13:57:24 -07004524 struct ifinfomsg *ifm;
4525
Johannes Berg8cb08172019-04-26 14:07:28 +02004526 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4527 tb, IFLA_MAX, ifla_policy,
4528 extack);
David Ahern8dfbda12018-10-07 20:16:43 -07004529 if (err < 0) {
4530 return -EINVAL;
4531 } else if (err == 0) {
4532 if (tb[IFLA_MASTER])
4533 *br_idx = nla_get_u32(tb[IFLA_MASTER]);
4534 }
4535
David Ahern4565d7e2018-10-08 13:57:24 -07004536 ifm = nlmsg_data(nlh);
David Ahern8dfbda12018-10-07 20:16:43 -07004537 *brport_idx = ifm->ifi_index;
4538 }
4539 return 0;
4540}
4541
John Fastabend77162022012-04-15 06:43:56 +00004542static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4543{
John Fastabend77162022012-04-15 06:43:56 +00004544 struct net_device *dev;
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004545 struct net_device *br_dev = NULL;
4546 const struct net_device_ops *ops = NULL;
4547 const struct net_device_ops *cops = NULL;
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004548 struct net *net = sock_net(skb->sk);
Roopa Prabhud2976532016-08-30 21:56:45 -07004549 struct hlist_head *head;
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004550 int brport_idx = 0;
4551 int br_idx = 0;
Roopa Prabhud2976532016-08-30 21:56:45 -07004552 int h, s_h;
4553 int idx = 0, s_idx;
4554 int err = 0;
4555 int fidx = 0;
John Fastabend77162022012-04-15 06:43:56 +00004556
David Ahern8c6e1372018-10-07 20:16:44 -07004557 if (cb->strict_check)
4558 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4559 cb->extack);
4560 else
4561 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4562 cb->extack);
David Ahern8dfbda12018-10-07 20:16:43 -07004563 if (err < 0)
4564 return err;
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004565
4566 if (br_idx) {
4567 br_dev = __dev_get_by_index(net, br_idx);
4568 if (!br_dev)
4569 return -ENODEV;
4570
4571 ops = br_dev->netdev_ops;
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004572 }
4573
Roopa Prabhud2976532016-08-30 21:56:45 -07004574 s_h = cb->args[0];
4575 s_idx = cb->args[1];
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004576
Roopa Prabhud2976532016-08-30 21:56:45 -07004577 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4578 idx = 0;
4579 head = &net->dev_index_head[h];
4580 hlist_for_each_entry(dev, head, index_hlist) {
4581
4582 if (brport_idx && (dev->ifindex != brport_idx))
4583 continue;
4584
4585 if (!br_idx) { /* user did not specify a specific bridge */
Julian Wiedmann2e92a2d2020-02-20 09:00:07 +01004586 if (netif_is_bridge_port(dev)) {
Roopa Prabhud2976532016-08-30 21:56:45 -07004587 br_dev = netdev_master_upper_dev_get(dev);
4588 cops = br_dev->netdev_ops;
4589 }
4590 } else {
4591 if (dev != br_dev &&
Julian Wiedmann2e92a2d2020-02-20 09:00:07 +01004592 !netif_is_bridge_port(dev))
Roopa Prabhud2976532016-08-30 21:56:45 -07004593 continue;
4594
4595 if (br_dev != netdev_master_upper_dev_get(dev) &&
Kyungrok Chung254ec032021-10-16 20:21:36 +09004596 !netif_is_bridge_master(dev))
Roopa Prabhud2976532016-08-30 21:56:45 -07004597 continue;
4598 cops = ops;
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004599 }
4600
Roopa Prabhud2976532016-08-30 21:56:45 -07004601 if (idx < s_idx)
4602 goto cont;
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004603
Julian Wiedmann2e92a2d2020-02-20 09:00:07 +01004604 if (netif_is_bridge_port(dev)) {
Roopa Prabhud2976532016-08-30 21:56:45 -07004605 if (cops && cops->ndo_fdb_dump) {
4606 err = cops->ndo_fdb_dump(skb, cb,
4607 br_dev, dev,
4608 &fidx);
4609 if (err == -EMSGSIZE)
4610 goto out;
4611 }
4612 }
Jamal Hadi Salim5e6d2432014-07-10 07:01:59 -04004613
Roopa Prabhud2976532016-08-30 21:56:45 -07004614 if (dev->netdev_ops->ndo_fdb_dump)
4615 err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4616 dev, NULL,
4617 &fidx);
4618 else
4619 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4620 &fidx);
4621 if (err == -EMSGSIZE)
4622 goto out;
4623
4624 cops = NULL;
4625
4626 /* reset fdb offset to 0 for rest of the interfaces */
4627 cb->args[2] = 0;
4628 fidx = 0;
4629cont:
4630 idx++;
John Fastabend77162022012-04-15 06:43:56 +00004631 }
John Fastabend77162022012-04-15 06:43:56 +00004632 }
John Fastabend77162022012-04-15 06:43:56 +00004633
Roopa Prabhud2976532016-08-30 21:56:45 -07004634out:
4635 cb->args[0] = h;
4636 cb->args[1] = idx;
4637 cb->args[2] = fidx;
4638
John Fastabend77162022012-04-15 06:43:56 +00004639 return skb->len;
4640}
4641
Roopa Prabhu5b2f94b2018-12-15 22:35:08 -08004642static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4643 struct nlattr **tb, u8 *ndm_flags,
4644 int *br_idx, int *brport_idx, u8 **addr,
4645 u16 *vid, struct netlink_ext_ack *extack)
4646{
4647 struct ndmsg *ndm;
4648 int err, i;
4649
4650 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4651 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4652 return -EINVAL;
4653 }
4654
4655 ndm = nlmsg_data(nlh);
4656 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4657 ndm->ndm_type) {
4658 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4659 return -EINVAL;
4660 }
4661
4662 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4663 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4664 return -EINVAL;
4665 }
4666
Johannes Berg8cb08172019-04-26 14:07:28 +02004667 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4668 NDA_MAX, nda_policy, extack);
Roopa Prabhu5b2f94b2018-12-15 22:35:08 -08004669 if (err < 0)
4670 return err;
4671
4672 *ndm_flags = ndm->ndm_flags;
4673 *brport_idx = ndm->ndm_ifindex;
4674 for (i = 0; i <= NDA_MAX; ++i) {
4675 if (!tb[i])
4676 continue;
4677
4678 switch (i) {
4679 case NDA_MASTER:
4680 *br_idx = nla_get_u32(tb[i]);
4681 break;
4682 case NDA_LLADDR:
4683 if (nla_len(tb[i]) != ETH_ALEN) {
4684 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4685 return -EINVAL;
4686 }
4687 *addr = nla_data(tb[i]);
4688 break;
4689 case NDA_VLAN:
4690 err = fdb_vid_parse(tb[i], vid, extack);
4691 if (err)
4692 return err;
4693 break;
4694 case NDA_VNI:
4695 break;
4696 default:
4697 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4698 return -EINVAL;
4699 }
4700 }
4701
4702 return 0;
4703}
4704
4705static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4706 struct netlink_ext_ack *extack)
4707{
4708 struct net_device *dev = NULL, *br_dev = NULL;
4709 const struct net_device_ops *ops = NULL;
4710 struct net *net = sock_net(in_skb->sk);
4711 struct nlattr *tb[NDA_MAX + 1];
4712 struct sk_buff *skb;
4713 int brport_idx = 0;
4714 u8 ndm_flags = 0;
4715 int br_idx = 0;
4716 u8 *addr = NULL;
4717 u16 vid = 0;
4718 int err;
4719
4720 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4721 &brport_idx, &addr, &vid, extack);
4722 if (err < 0)
4723 return err;
4724
Nikolay Aleksandrovf989d032018-12-30 14:33:20 +02004725 if (!addr) {
4726 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4727 return -EINVAL;
4728 }
4729
Roopa Prabhu5b2f94b2018-12-15 22:35:08 -08004730 if (brport_idx) {
4731 dev = __dev_get_by_index(net, brport_idx);
4732 if (!dev) {
4733 NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4734 return -ENODEV;
4735 }
4736 }
4737
4738 if (br_idx) {
4739 if (dev) {
4740 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4741 return -EINVAL;
4742 }
4743
4744 br_dev = __dev_get_by_index(net, br_idx);
4745 if (!br_dev) {
4746 NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4747 return -EINVAL;
4748 }
4749 ops = br_dev->netdev_ops;
4750 }
4751
4752 if (dev) {
4753 if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
Julian Wiedmann2e92a2d2020-02-20 09:00:07 +01004754 if (!netif_is_bridge_port(dev)) {
Roopa Prabhu5b2f94b2018-12-15 22:35:08 -08004755 NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4756 return -EINVAL;
4757 }
4758 br_dev = netdev_master_upper_dev_get(dev);
4759 if (!br_dev) {
4760 NL_SET_ERR_MSG(extack, "Master of device not found");
4761 return -EINVAL;
4762 }
4763 ops = br_dev->netdev_ops;
4764 } else {
4765 if (!(ndm_flags & NTF_SELF)) {
4766 NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4767 return -EINVAL;
4768 }
4769 ops = dev->netdev_ops;
4770 }
4771 }
4772
4773 if (!br_dev && !dev) {
4774 NL_SET_ERR_MSG(extack, "No device specified");
4775 return -ENODEV;
4776 }
4777
4778 if (!ops || !ops->ndo_fdb_get) {
4779 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4780 return -EOPNOTSUPP;
4781 }
4782
4783 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4784 if (!skb)
4785 return -ENOBUFS;
4786
4787 if (br_dev)
4788 dev = br_dev;
4789 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4790 NETLINK_CB(in_skb).portid,
4791 nlh->nlmsg_seq, extack);
4792 if (err)
4793 goto out;
4794
4795 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4796out:
4797 kfree_skb(skb);
4798 return err;
4799}
4800
Scott Feldman2c3c0312014-11-28 14:34:25 +01004801static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4802 unsigned int attrnum, unsigned int flag)
4803{
4804 if (mask & flag)
4805 return nla_put_u8(skb, attrnum, !!(flags & flag));
4806 return 0;
4807}
4808
John Fastabend815cccb2012-10-24 08:13:09 +00004809int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
Scott Feldman2c3c0312014-11-28 14:34:25 +01004810 struct net_device *dev, u16 mode,
Scott Feldman7d4f8d82015-06-22 00:27:17 -07004811 u32 flags, u32 mask, int nlflags,
4812 u32 filter_mask,
4813 int (*vlan_fill)(struct sk_buff *skb,
4814 struct net_device *dev,
4815 u32 filter_mask))
John Fastabend815cccb2012-10-24 08:13:09 +00004816{
4817 struct nlmsghdr *nlh;
4818 struct ifinfomsg *ifm;
4819 struct nlattr *br_afspec;
Scott Feldman2c3c0312014-11-28 14:34:25 +01004820 struct nlattr *protinfo;
John Fastabend815cccb2012-10-24 08:13:09 +00004821 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
Jiri Pirko898e5062013-01-03 22:48:52 +00004822 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
Scott Feldman7d4f8d82015-06-22 00:27:17 -07004823 int err = 0;
John Fastabend815cccb2012-10-24 08:13:09 +00004824
Nicolas Dichtel46c264d2015-04-28 18:33:49 +02004825 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
John Fastabend815cccb2012-10-24 08:13:09 +00004826 if (nlh == NULL)
4827 return -EMSGSIZE;
4828
4829 ifm = nlmsg_data(nlh);
4830 ifm->ifi_family = AF_BRIDGE;
4831 ifm->__ifi_pad = 0;
4832 ifm->ifi_type = dev->type;
4833 ifm->ifi_index = dev->ifindex;
4834 ifm->ifi_flags = dev_get_flags(dev);
4835 ifm->ifi_change = 0;
4836
4837
4838 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4839 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4840 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
Jiri Pirko898e5062013-01-03 22:48:52 +00004841 (br_dev &&
4842 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
John Fastabend815cccb2012-10-24 08:13:09 +00004843 (dev->addr_len &&
4844 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
Nicolas Dichtela54acb32015-04-02 17:07:00 +02004845 (dev->ifindex != dev_get_iflink(dev) &&
4846 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
John Fastabend815cccb2012-10-24 08:13:09 +00004847 goto nla_put_failure;
4848
Michal Kubecekae0be8d2019-04-26 11:13:06 +02004849 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
John Fastabend815cccb2012-10-24 08:13:09 +00004850 if (!br_afspec)
4851 goto nla_put_failure;
4852
Roopa Prabhu1d460b92014-12-08 14:04:20 -08004853 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
John Fastabend815cccb2012-10-24 08:13:09 +00004854 nla_nest_cancel(skb, br_afspec);
4855 goto nla_put_failure;
4856 }
Roopa Prabhu1d460b92014-12-08 14:04:20 -08004857
4858 if (mode != BRIDGE_MODE_UNDEF) {
4859 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4860 nla_nest_cancel(skb, br_afspec);
4861 goto nla_put_failure;
4862 }
4863 }
Scott Feldman7d4f8d82015-06-22 00:27:17 -07004864 if (vlan_fill) {
4865 err = vlan_fill(skb, dev, filter_mask);
4866 if (err) {
4867 nla_nest_cancel(skb, br_afspec);
4868 goto nla_put_failure;
4869 }
4870 }
John Fastabend815cccb2012-10-24 08:13:09 +00004871 nla_nest_end(skb, br_afspec);
4872
Michal Kubecekae0be8d2019-04-26 11:13:06 +02004873 protinfo = nla_nest_start(skb, IFLA_PROTINFO);
Scott Feldman2c3c0312014-11-28 14:34:25 +01004874 if (!protinfo)
4875 goto nla_put_failure;
4876
4877 if (brport_nla_put_flag(skb, flags, mask,
4878 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4879 brport_nla_put_flag(skb, flags, mask,
4880 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4881 brport_nla_put_flag(skb, flags, mask,
4882 IFLA_BRPORT_FAST_LEAVE,
4883 BR_MULTICAST_FAST_LEAVE) ||
4884 brport_nla_put_flag(skb, flags, mask,
4885 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4886 brport_nla_put_flag(skb, flags, mask,
4887 IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4888 brport_nla_put_flag(skb, flags, mask,
4889 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4890 brport_nla_put_flag(skb, flags, mask,
4891 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4892 brport_nla_put_flag(skb, flags, mask,
Julian Wiedmann583cb0b2020-02-17 14:45:01 +01004893 IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4894 brport_nla_put_flag(skb, flags, mask,
4895 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4896 brport_nla_put_flag(skb, flags, mask,
4897 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
Scott Feldman2c3c0312014-11-28 14:34:25 +01004898 nla_nest_cancel(skb, protinfo);
4899 goto nla_put_failure;
4900 }
4901
4902 nla_nest_end(skb, protinfo);
4903
Johannes Berg053c0952015-01-16 22:09:00 +01004904 nlmsg_end(skb, nlh);
4905 return 0;
John Fastabend815cccb2012-10-24 08:13:09 +00004906nla_put_failure:
4907 nlmsg_cancel(skb, nlh);
Scott Feldman7d4f8d82015-06-22 00:27:17 -07004908 return err ? err : -EMSGSIZE;
John Fastabend815cccb2012-10-24 08:13:09 +00004909}
Scott Feldman7d4f8d82015-06-22 00:27:17 -07004910EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
John Fastabend815cccb2012-10-24 08:13:09 +00004911
David Ahern2d011be2018-10-07 20:16:31 -07004912static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4913 bool strict_check, u32 *filter_mask,
4914 struct netlink_ext_ack *extack)
4915{
4916 struct nlattr *tb[IFLA_MAX+1];
4917 int err, i;
4918
4919 if (strict_check) {
4920 struct ifinfomsg *ifm;
4921
4922 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4923 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4924 return -EINVAL;
4925 }
4926
4927 ifm = nlmsg_data(nlh);
4928 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4929 ifm->ifi_change || ifm->ifi_index) {
4930 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4931 return -EINVAL;
4932 }
4933
Johannes Berg8cb08172019-04-26 14:07:28 +02004934 err = nlmsg_parse_deprecated_strict(nlh,
4935 sizeof(struct ifinfomsg),
4936 tb, IFLA_MAX, ifla_policy,
4937 extack);
David Ahern2d011be2018-10-07 20:16:31 -07004938 } else {
Johannes Berg8cb08172019-04-26 14:07:28 +02004939 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4940 tb, IFLA_MAX, ifla_policy,
4941 extack);
David Ahern2d011be2018-10-07 20:16:31 -07004942 }
4943 if (err < 0)
4944 return err;
4945
4946 /* new attributes should only be added with strict checking */
4947 for (i = 0; i <= IFLA_MAX; ++i) {
4948 if (!tb[i])
4949 continue;
4950
4951 switch (i) {
4952 case IFLA_EXT_MASK:
4953 *filter_mask = nla_get_u32(tb[i]);
4954 break;
4955 default:
4956 if (strict_check) {
4957 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4958 return -EINVAL;
4959 }
4960 }
4961 }
4962
4963 return 0;
4964}
4965
John Fastabende5a55a82012-10-24 08:12:57 +00004966static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4967{
David Ahern2d011be2018-10-07 20:16:31 -07004968 const struct nlmsghdr *nlh = cb->nlh;
John Fastabende5a55a82012-10-24 08:12:57 +00004969 struct net *net = sock_net(skb->sk);
4970 struct net_device *dev;
4971 int idx = 0;
4972 u32 portid = NETLINK_CB(cb->skb).portid;
David Ahern2d011be2018-10-07 20:16:31 -07004973 u32 seq = nlh->nlmsg_seq;
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +00004974 u32 filter_mask = 0;
Roopa Prabhud64f69b2015-09-15 14:44:29 -07004975 int err;
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +00004976
David Ahern2d011be2018-10-07 20:16:31 -07004977 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4978 cb->extack);
4979 if (err < 0 && cb->strict_check)
4980 return err;
John Fastabende5a55a82012-10-24 08:12:57 +00004981
4982 rcu_read_lock();
4983 for_each_netdev_rcu(net, dev) {
4984 const struct net_device_ops *ops = dev->netdev_ops;
Jiri Pirko898e5062013-01-03 22:48:52 +00004985 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
John Fastabende5a55a82012-10-24 08:12:57 +00004986
Jiri Pirko898e5062013-01-03 22:48:52 +00004987 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
Roopa Prabhud64f69b2015-09-15 14:44:29 -07004988 if (idx >= cb->args[0]) {
4989 err = br_dev->netdev_ops->ndo_bridge_getlink(
4990 skb, portid, seq, dev,
4991 filter_mask, NLM_F_MULTI);
David Ahernf6c57752017-05-15 23:19:17 -07004992 if (err < 0 && err != -EOPNOTSUPP) {
4993 if (likely(skb->len))
4994 break;
4995
4996 goto out_err;
4997 }
Roopa Prabhud64f69b2015-09-15 14:44:29 -07004998 }
Ben Hutchings25b1e672012-11-02 12:56:52 +00004999 idx++;
John Fastabende5a55a82012-10-24 08:12:57 +00005000 }
5001
5002 if (ops->ndo_bridge_getlink) {
Roopa Prabhud64f69b2015-09-15 14:44:29 -07005003 if (idx >= cb->args[0]) {
5004 err = ops->ndo_bridge_getlink(skb, portid,
5005 seq, dev,
5006 filter_mask,
5007 NLM_F_MULTI);
David Ahernf6c57752017-05-15 23:19:17 -07005008 if (err < 0 && err != -EOPNOTSUPP) {
5009 if (likely(skb->len))
5010 break;
5011
5012 goto out_err;
5013 }
Roopa Prabhud64f69b2015-09-15 14:44:29 -07005014 }
Ben Hutchings25b1e672012-11-02 12:56:52 +00005015 idx++;
John Fastabende5a55a82012-10-24 08:12:57 +00005016 }
5017 }
David Ahernf6c57752017-05-15 23:19:17 -07005018 err = skb->len;
5019out_err:
John Fastabende5a55a82012-10-24 08:12:57 +00005020 rcu_read_unlock();
5021 cb->args[0] = idx;
5022
David Ahernf6c57752017-05-15 23:19:17 -07005023 return err;
John Fastabende5a55a82012-10-24 08:12:57 +00005024}
5025
John Fastabend2469ffd2012-10-24 08:13:03 +00005026static inline size_t bridge_nlmsg_size(void)
5027{
5028 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
5029 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
5030 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
5031 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
5032 + nla_total_size(sizeof(u32)) /* IFLA_MTU */
5033 + nla_total_size(sizeof(u32)) /* IFLA_LINK */
5034 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
5035 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
5036 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
5037 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
5038 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
5039}
5040
Roopa Prabhu02dba432015-01-14 20:02:25 -08005041static int rtnl_bridge_notify(struct net_device *dev)
John Fastabend2469ffd2012-10-24 08:13:03 +00005042{
5043 struct net *net = dev_net(dev);
John Fastabend2469ffd2012-10-24 08:13:03 +00005044 struct sk_buff *skb;
5045 int err = -EOPNOTSUPP;
5046
Roopa Prabhu02dba432015-01-14 20:02:25 -08005047 if (!dev->netdev_ops->ndo_bridge_getlink)
5048 return 0;
5049
John Fastabend2469ffd2012-10-24 08:13:03 +00005050 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
5051 if (!skb) {
5052 err = -ENOMEM;
5053 goto errout;
5054 }
5055
Nicolas Dichtel46c264d2015-04-28 18:33:49 +02005056 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
Roopa Prabhu02dba432015-01-14 20:02:25 -08005057 if (err < 0)
5058 goto errout;
John Fastabend2469ffd2012-10-24 08:13:03 +00005059
Ido Schimmeld2e381c2021-06-09 14:17:53 +03005060 /* Notification info is only filled for bridge ports, not the bridge
5061 * device itself. Therefore, a zero notification length is valid and
5062 * should not result in an error.
5063 */
5064 if (!skb->len)
Roopa Prabhu59ccaaa2015-01-28 16:23:11 -08005065 goto errout;
5066
John Fastabend2469ffd2012-10-24 08:13:03 +00005067 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
5068 return 0;
5069errout:
5070 WARN_ON(err == -EMSGSIZE);
5071 kfree_skb(skb);
Roopa Prabhu59ccaaa2015-01-28 16:23:11 -08005072 if (err)
5073 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
John Fastabend2469ffd2012-10-24 08:13:03 +00005074 return err;
5075}
5076
David Ahernc21ef3e2017-04-16 09:48:24 -07005077static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
5078 struct netlink_ext_ack *extack)
John Fastabende5a55a82012-10-24 08:12:57 +00005079{
5080 struct net *net = sock_net(skb->sk);
5081 struct ifinfomsg *ifm;
5082 struct net_device *dev;
John Fastabend2469ffd2012-10-24 08:13:03 +00005083 struct nlattr *br_spec, *attr = NULL;
5084 int rem, err = -EOPNOTSUPP;
Rosen, Rami4de8b412015-01-19 11:45:04 +02005085 u16 flags = 0;
John Fastabendc38e01b2012-11-02 16:32:36 +00005086 bool have_flags = false;
John Fastabende5a55a82012-10-24 08:12:57 +00005087
5088 if (nlmsg_len(nlh) < sizeof(*ifm))
5089 return -EINVAL;
5090
5091 ifm = nlmsg_data(nlh);
5092 if (ifm->ifi_family != AF_BRIDGE)
5093 return -EPFNOSUPPORT;
5094
5095 dev = __dev_get_by_index(net, ifm->ifi_index);
5096 if (!dev) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02005097 NL_SET_ERR_MSG(extack, "unknown ifindex");
John Fastabende5a55a82012-10-24 08:12:57 +00005098 return -ENODEV;
5099 }
5100
John Fastabend2469ffd2012-10-24 08:13:03 +00005101 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5102 if (br_spec) {
5103 nla_for_each_nested(attr, br_spec, rem) {
5104 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
Thomas Graf6e8d1c52014-11-26 13:42:16 +01005105 if (nla_len(attr) < sizeof(flags))
5106 return -EINVAL;
5107
John Fastabendc38e01b2012-11-02 16:32:36 +00005108 have_flags = true;
John Fastabend2469ffd2012-10-24 08:13:03 +00005109 flags = nla_get_u16(attr);
5110 break;
5111 }
5112 }
5113 }
5114
5115 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
Jiri Pirko898e5062013-01-03 22:48:52 +00005116 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5117
5118 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
John Fastabend2469ffd2012-10-24 08:13:03 +00005119 err = -EOPNOTSUPP;
5120 goto out;
5121 }
5122
Petr Machata2fd527b2018-12-12 17:02:48 +00005123 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
5124 extack);
John Fastabende5a55a82012-10-24 08:12:57 +00005125 if (err)
5126 goto out;
John Fastabend2469ffd2012-10-24 08:13:03 +00005127
5128 flags &= ~BRIDGE_FLAGS_MASTER;
John Fastabende5a55a82012-10-24 08:12:57 +00005129 }
5130
John Fastabend2469ffd2012-10-24 08:13:03 +00005131 if ((flags & BRIDGE_FLAGS_SELF)) {
5132 if (!dev->netdev_ops->ndo_bridge_setlink)
5133 err = -EOPNOTSUPP;
5134 else
Roopa Prabhuadd511b2015-01-29 22:40:12 -08005135 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
Petr Machata2fd527b2018-12-12 17:02:48 +00005136 flags,
5137 extack);
Roopa Prabhu02dba432015-01-14 20:02:25 -08005138 if (!err) {
John Fastabend2469ffd2012-10-24 08:13:03 +00005139 flags &= ~BRIDGE_FLAGS_SELF;
Roopa Prabhu02dba432015-01-14 20:02:25 -08005140
5141 /* Generate event to notify upper layer of bridge
5142 * change
5143 */
5144 err = rtnl_bridge_notify(dev);
5145 }
John Fastabend2469ffd2012-10-24 08:13:03 +00005146 }
5147
John Fastabendc38e01b2012-11-02 16:32:36 +00005148 if (have_flags)
John Fastabend2469ffd2012-10-24 08:13:03 +00005149 memcpy(nla_data(attr), &flags, sizeof(flags));
John Fastabende5a55a82012-10-24 08:12:57 +00005150out:
5151 return err;
5152}
5153
David Ahernc21ef3e2017-04-16 09:48:24 -07005154static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
5155 struct netlink_ext_ack *extack)
Vlad Yasevich407af322013-02-13 12:00:12 +00005156{
5157 struct net *net = sock_net(skb->sk);
5158 struct ifinfomsg *ifm;
5159 struct net_device *dev;
5160 struct nlattr *br_spec, *attr = NULL;
5161 int rem, err = -EOPNOTSUPP;
Rosen, Rami4de8b412015-01-19 11:45:04 +02005162 u16 flags = 0;
Vlad Yasevich407af322013-02-13 12:00:12 +00005163 bool have_flags = false;
5164
5165 if (nlmsg_len(nlh) < sizeof(*ifm))
5166 return -EINVAL;
5167
5168 ifm = nlmsg_data(nlh);
5169 if (ifm->ifi_family != AF_BRIDGE)
5170 return -EPFNOSUPPORT;
5171
5172 dev = __dev_get_by_index(net, ifm->ifi_index);
5173 if (!dev) {
Florian Westphalb88d12e2017-10-10 17:10:04 +02005174 NL_SET_ERR_MSG(extack, "unknown ifindex");
Vlad Yasevich407af322013-02-13 12:00:12 +00005175 return -ENODEV;
5176 }
5177
5178 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
5179 if (br_spec) {
5180 nla_for_each_nested(attr, br_spec, rem) {
5181 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
Thomas Graf6e8d1c52014-11-26 13:42:16 +01005182 if (nla_len(attr) < sizeof(flags))
5183 return -EINVAL;
5184
Vlad Yasevich407af322013-02-13 12:00:12 +00005185 have_flags = true;
5186 flags = nla_get_u16(attr);
5187 break;
5188 }
5189 }
5190 }
5191
Vlad Yasevich407af322013-02-13 12:00:12 +00005192 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
5193 struct net_device *br_dev = netdev_master_upper_dev_get(dev);
5194
5195 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
5196 err = -EOPNOTSUPP;
5197 goto out;
5198 }
5199
Roopa Prabhuadd511b2015-01-29 22:40:12 -08005200 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
Vlad Yasevich407af322013-02-13 12:00:12 +00005201 if (err)
5202 goto out;
5203
5204 flags &= ~BRIDGE_FLAGS_MASTER;
5205 }
5206
5207 if ((flags & BRIDGE_FLAGS_SELF)) {
5208 if (!dev->netdev_ops->ndo_bridge_dellink)
5209 err = -EOPNOTSUPP;
5210 else
Roopa Prabhuadd511b2015-01-29 22:40:12 -08005211 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
5212 flags);
Vlad Yasevich407af322013-02-13 12:00:12 +00005213
Roopa Prabhu02dba432015-01-14 20:02:25 -08005214 if (!err) {
Vlad Yasevich407af322013-02-13 12:00:12 +00005215 flags &= ~BRIDGE_FLAGS_SELF;
Roopa Prabhu02dba432015-01-14 20:02:25 -08005216
5217 /* Generate event to notify upper layer of bridge
5218 * change
5219 */
5220 err = rtnl_bridge_notify(dev);
5221 }
Vlad Yasevich407af322013-02-13 12:00:12 +00005222 }
5223
5224 if (have_flags)
5225 memcpy(nla_data(attr), &flags, sizeof(flags));
Vlad Yasevich407af322013-02-13 12:00:12 +00005226out:
5227 return err;
5228}
5229
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005230static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5231{
5232 return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5233 (!idxattr || idxattr == attrid);
5234}
5235
Petr Machataf6e0fb82022-03-02 18:31:16 +02005236static bool
5237rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005238{
Petr Machataf6e0fb82022-03-02 18:31:16 +02005239 return dev->netdev_ops &&
5240 dev->netdev_ops->ndo_has_offload_stats &&
5241 dev->netdev_ops->ndo_get_offload_stats &&
5242 dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
5243}
5244
5245static unsigned int
5246rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
5247{
5248 return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
5249 sizeof(struct rtnl_link_stats64) : 0;
5250}
5251
5252static int
5253rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
5254 struct sk_buff *skb)
5255{
5256 unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
5257 struct nlattr *attr = NULL;
5258 void *attr_data;
5259 int err;
5260
5261 if (!size)
5262 return -ENODATA;
5263
5264 attr = nla_reserve_64bit(skb, attr_id, size,
5265 IFLA_OFFLOAD_XSTATS_UNSPEC);
5266 if (!attr)
5267 return -EMSGSIZE;
5268
5269 attr_data = nla_data(attr);
5270 memset(attr_data, 0, size);
5271
5272 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
5273 if (err)
5274 return err;
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005275
5276 return 0;
5277}
5278
Petr Machata0e7788f2022-03-02 18:31:21 +02005279static unsigned int
5280rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
5281 enum netdev_offload_xstats_type type)
5282{
5283 bool enabled = netdev_offload_xstats_enabled(dev, type);
5284
5285 return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
5286}
5287
5288struct rtnl_offload_xstats_request_used {
5289 bool request;
5290 bool used;
5291};
5292
5293static int
5294rtnl_offload_xstats_get_stats(struct net_device *dev,
5295 enum netdev_offload_xstats_type type,
5296 struct rtnl_offload_xstats_request_used *ru,
5297 struct rtnl_hw_stats64 *stats,
5298 struct netlink_ext_ack *extack)
5299{
5300 bool request;
5301 bool used;
5302 int err;
5303
5304 request = netdev_offload_xstats_enabled(dev, type);
5305 if (!request) {
5306 used = false;
5307 goto out;
5308 }
5309
5310 err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
5311 if (err)
5312 return err;
5313
5314out:
5315 if (ru) {
5316 ru->request = request;
5317 ru->used = used;
5318 }
5319 return 0;
5320}
5321
5322static int
5323rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
5324 struct rtnl_offload_xstats_request_used *ru)
5325{
5326 struct nlattr *nest;
5327
5328 nest = nla_nest_start(skb, attr_id);
5329 if (!nest)
5330 return -EMSGSIZE;
5331
5332 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
5333 goto nla_put_failure;
5334
5335 if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
5336 goto nla_put_failure;
5337
5338 nla_nest_end(skb, nest);
5339 return 0;
5340
5341nla_put_failure:
5342 nla_nest_cancel(skb, nest);
5343 return -EMSGSIZE;
5344}
5345
5346static int
5347rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
5348 struct netlink_ext_ack *extack)
5349{
5350 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5351 struct rtnl_offload_xstats_request_used ru_l3;
5352 struct nlattr *nest;
5353 int err;
5354
5355 err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
5356 if (err)
5357 return err;
5358
5359 nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5360 if (!nest)
5361 return -EMSGSIZE;
5362
5363 if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
5364 IFLA_OFFLOAD_XSTATS_L3_STATS,
5365 &ru_l3))
5366 goto nla_put_failure;
5367
5368 nla_nest_end(skb, nest);
5369 return 0;
5370
5371nla_put_failure:
5372 nla_nest_cancel(skb, nest);
5373 return -EMSGSIZE;
5374}
5375
Petr Machata6b524a12022-03-02 18:31:15 +02005376static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
Petr Machata05415bc2022-03-02 18:31:18 +02005377 int *prividx, u32 off_filter_mask,
5378 struct netlink_ext_ack *extack)
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005379{
Petr Machata0e7788f2022-03-02 18:31:21 +02005380 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5381 int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
5382 int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
Petr Machataf6e0fb82022-03-02 18:31:16 +02005383 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
5384 bool have_data = false;
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005385 int err;
5386
Petr Machata46efc972022-03-02 18:31:17 +02005387 if (*prividx <= attr_id_cpu_hit &&
5388 (off_filter_mask &
5389 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
Petr Machataf6e0fb82022-03-02 18:31:16 +02005390 err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
5391 if (!err) {
5392 have_data = true;
5393 } else if (err != -ENODATA) {
5394 *prividx = attr_id_cpu_hit;
5395 return err;
5396 }
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005397 }
5398
Petr Machata0e7788f2022-03-02 18:31:21 +02005399 if (*prividx <= attr_id_hw_s_info &&
5400 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
5401 *prividx = attr_id_hw_s_info;
5402
5403 err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
5404 if (err)
5405 return err;
5406
5407 have_data = true;
5408 *prividx = 0;
5409 }
5410
5411 if (*prividx <= attr_id_l3_stats &&
5412 (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
5413 unsigned int size_l3;
5414 struct nlattr *attr;
5415
5416 *prividx = attr_id_l3_stats;
5417
5418 size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
Petr Machata23cfe942022-04-12 22:25:06 +02005419 if (!size_l3)
5420 goto skip_l3_stats;
Petr Machata0e7788f2022-03-02 18:31:21 +02005421 attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
5422 IFLA_OFFLOAD_XSTATS_UNSPEC);
5423 if (!attr)
5424 return -EMSGSIZE;
5425
5426 err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
5427 nla_data(attr), extack);
5428 if (err)
5429 return err;
5430
5431 have_data = true;
Petr Machata23cfe942022-04-12 22:25:06 +02005432skip_l3_stats:
Petr Machata0e7788f2022-03-02 18:31:21 +02005433 *prividx = 0;
5434 }
5435
Petr Machataf6e0fb82022-03-02 18:31:16 +02005436 if (!have_data)
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005437 return -ENODATA;
5438
5439 *prividx = 0;
5440 return 0;
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005441}
5442
Petr Machata0e7788f2022-03-02 18:31:21 +02005443static unsigned int
5444rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
5445 enum netdev_offload_xstats_type type)
5446{
5447 bool enabled = netdev_offload_xstats_enabled(dev, type);
5448
5449 return nla_total_size(0) +
5450 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
5451 nla_total_size(sizeof(u8)) +
5452 /* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
5453 (enabled ? nla_total_size(sizeof(u8)) : 0) +
5454 0;
5455}
5456
5457static unsigned int
5458rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
5459{
5460 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
5461
5462 return nla_total_size(0) +
5463 /* IFLA_OFFLOAD_XSTATS_L3_STATS */
5464 rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
5465 0;
5466}
5467
Petr Machata46efc972022-03-02 18:31:17 +02005468static int rtnl_offload_xstats_get_size(const struct net_device *dev,
5469 u32 off_filter_mask)
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005470{
Petr Machata0e7788f2022-03-02 18:31:21 +02005471 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
Petr Machataf6e0fb82022-03-02 18:31:16 +02005472 int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005473 int nla_size = 0;
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005474 int size;
5475
Petr Machata46efc972022-03-02 18:31:17 +02005476 if (off_filter_mask &
5477 IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
5478 size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
5479 nla_size += nla_total_size_64bit(size);
5480 }
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005481
Petr Machata0e7788f2022-03-02 18:31:21 +02005482 if (off_filter_mask &
5483 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
5484 nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
5485
5486 if (off_filter_mask &
5487 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
5488 size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
5489 nla_size += nla_total_size_64bit(size);
5490 }
5491
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005492 if (nla_size != 0)
5493 nla_size += nla_total_size(0);
5494
5495 return nla_size;
5496}
5497
Petr Machata46efc972022-03-02 18:31:17 +02005498struct rtnl_stats_dump_filters {
5499 /* mask[0] filters outer attributes. Then individual nests have their
5500 * filtering mask at the index of the nested attribute.
5501 */
5502 u32 mask[IFLA_STATS_MAX + 1];
5503};
5504
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005505static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5506 int type, u32 pid, u32 seq, u32 change,
Petr Machata46efc972022-03-02 18:31:17 +02005507 unsigned int flags,
5508 const struct rtnl_stats_dump_filters *filters,
Petr Machata05415bc2022-03-02 18:31:18 +02005509 int *idxattr, int *prividx,
5510 struct netlink_ext_ack *extack)
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005511{
Petr Machata46efc972022-03-02 18:31:17 +02005512 unsigned int filter_mask = filters->mask[0];
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005513 struct if_stats_msg *ifsm;
5514 struct nlmsghdr *nlh;
5515 struct nlattr *attr;
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005516 int s_prividx = *prividx;
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005517 int err;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005518
5519 ASSERT_RTNL();
5520
5521 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5522 if (!nlh)
5523 return -EMSGSIZE;
5524
5525 ifsm = nlmsg_data(nlh);
Nikolay Aleksandrovce024f42017-10-03 13:20:48 +03005526 ifsm->family = PF_UNSPEC;
5527 ifsm->pad1 = 0;
5528 ifsm->pad2 = 0;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005529 ifsm->ifindex = dev->ifindex;
5530 ifsm->filter_mask = filter_mask;
5531
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005532 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005533 struct rtnl_link_stats64 *sp;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005534
Nicolas Dichtel58414d32016-04-21 18:58:25 +02005535 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5536 sizeof(struct rtnl_link_stats64),
5537 IFLA_STATS_UNSPEC);
Petr Machata216e6902022-03-02 18:31:19 +02005538 if (!attr) {
5539 err = -EMSGSIZE;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005540 goto nla_put_failure;
Petr Machata216e6902022-03-02 18:31:19 +02005541 }
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005542
5543 sp = nla_data(attr);
5544 dev_get_stats(dev, sp);
5545 }
5546
Nikolay Aleksandrov97a47fa2016-04-30 10:25:27 +02005547 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5548 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5549
5550 if (ops && ops->fill_linkxstats) {
Nikolay Aleksandrov97a47fa2016-04-30 10:25:27 +02005551 *idxattr = IFLA_STATS_LINK_XSTATS;
Michal Kubecekae0be8d2019-04-26 11:13:06 +02005552 attr = nla_nest_start_noflag(skb,
5553 IFLA_STATS_LINK_XSTATS);
Petr Machata216e6902022-03-02 18:31:19 +02005554 if (!attr) {
5555 err = -EMSGSIZE;
Nikolay Aleksandrov97a47fa2016-04-30 10:25:27 +02005556 goto nla_put_failure;
Petr Machata216e6902022-03-02 18:31:19 +02005557 }
Nikolay Aleksandrov97a47fa2016-04-30 10:25:27 +02005558
Nikolay Aleksandrov80e73cc2016-06-28 16:57:05 +02005559 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5560 nla_nest_end(skb, attr);
5561 if (err)
5562 goto nla_put_failure;
5563 *idxattr = 0;
5564 }
5565 }
5566
5567 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5568 *idxattr)) {
5569 const struct rtnl_link_ops *ops = NULL;
5570 const struct net_device *master;
5571
5572 master = netdev_master_upper_dev_get(dev);
5573 if (master)
5574 ops = master->rtnl_link_ops;
5575 if (ops && ops->fill_linkxstats) {
Nikolay Aleksandrov80e73cc2016-06-28 16:57:05 +02005576 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
Michal Kubecekae0be8d2019-04-26 11:13:06 +02005577 attr = nla_nest_start_noflag(skb,
5578 IFLA_STATS_LINK_XSTATS_SLAVE);
Petr Machata216e6902022-03-02 18:31:19 +02005579 if (!attr) {
5580 err = -EMSGSIZE;
Nikolay Aleksandrov80e73cc2016-06-28 16:57:05 +02005581 goto nla_put_failure;
Petr Machata216e6902022-03-02 18:31:19 +02005582 }
Nikolay Aleksandrov80e73cc2016-06-28 16:57:05 +02005583
5584 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
Nikolay Aleksandrov97a47fa2016-04-30 10:25:27 +02005585 nla_nest_end(skb, attr);
5586 if (err)
5587 goto nla_put_failure;
5588 *idxattr = 0;
5589 }
5590 }
5591
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005592 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5593 *idxattr)) {
Petr Machata46efc972022-03-02 18:31:17 +02005594 u32 off_filter_mask;
5595
5596 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005597 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
Michal Kubecekae0be8d2019-04-26 11:13:06 +02005598 attr = nla_nest_start_noflag(skb,
5599 IFLA_STATS_LINK_OFFLOAD_XSTATS);
Petr Machata216e6902022-03-02 18:31:19 +02005600 if (!attr) {
5601 err = -EMSGSIZE;
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005602 goto nla_put_failure;
Petr Machata216e6902022-03-02 18:31:19 +02005603 }
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005604
Petr Machata46efc972022-03-02 18:31:17 +02005605 err = rtnl_offload_xstats_fill(skb, dev, prividx,
Petr Machata05415bc2022-03-02 18:31:18 +02005606 off_filter_mask, extack);
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005607 if (err == -ENODATA)
5608 nla_nest_cancel(skb, attr);
5609 else
5610 nla_nest_end(skb, attr);
5611
5612 if (err && err != -ENODATA)
5613 goto nla_put_failure;
5614 *idxattr = 0;
5615 }
5616
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005617 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5618 struct rtnl_af_ops *af_ops;
5619
5620 *idxattr = IFLA_STATS_AF_SPEC;
Michal Kubecekae0be8d2019-04-26 11:13:06 +02005621 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
Petr Machata216e6902022-03-02 18:31:19 +02005622 if (!attr) {
5623 err = -EMSGSIZE;
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005624 goto nla_put_failure;
Petr Machata216e6902022-03-02 18:31:19 +02005625 }
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005626
Florian Westphal5fa85a02017-10-16 15:44:36 +02005627 rcu_read_lock();
5628 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005629 if (af_ops->fill_stats_af) {
5630 struct nlattr *af;
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005631
Michal Kubecekae0be8d2019-04-26 11:13:06 +02005632 af = nla_nest_start_noflag(skb,
5633 af_ops->family);
Florian Westphal5fa85a02017-10-16 15:44:36 +02005634 if (!af) {
5635 rcu_read_unlock();
Tom Rix57d29a22022-03-05 10:13:46 -08005636 err = -EMSGSIZE;
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005637 goto nla_put_failure;
Florian Westphal5fa85a02017-10-16 15:44:36 +02005638 }
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005639 err = af_ops->fill_stats_af(skb, dev);
5640
Florian Westphal5fa85a02017-10-16 15:44:36 +02005641 if (err == -ENODATA) {
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005642 nla_nest_cancel(skb, af);
Florian Westphal5fa85a02017-10-16 15:44:36 +02005643 } else if (err < 0) {
5644 rcu_read_unlock();
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005645 goto nla_put_failure;
Florian Westphal5fa85a02017-10-16 15:44:36 +02005646 }
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005647
5648 nla_nest_end(skb, af);
5649 }
5650 }
Florian Westphal5fa85a02017-10-16 15:44:36 +02005651 rcu_read_unlock();
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005652
5653 nla_nest_end(skb, attr);
5654
5655 *idxattr = 0;
5656 }
5657
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005658 nlmsg_end(skb, nlh);
5659
5660 return 0;
5661
5662nla_put_failure:
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005663 /* not a multi message or no progress mean a real error */
5664 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5665 nlmsg_cancel(skb, nlh);
5666 else
5667 nlmsg_end(skb, nlh);
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005668
Petr Machata216e6902022-03-02 18:31:19 +02005669 return err;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005670}
5671
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005672static size_t if_nlmsg_stats_size(const struct net_device *dev,
Petr Machata46efc972022-03-02 18:31:17 +02005673 const struct rtnl_stats_dump_filters *filters)
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005674{
Eric Dumazetd3436792021-10-05 14:04:17 -07005675 size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
Petr Machata46efc972022-03-02 18:31:17 +02005676 unsigned int filter_mask = filters->mask[0];
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005677
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005678 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005679 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5680
Nikolay Aleksandrov97a47fa2016-04-30 10:25:27 +02005681 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5682 const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
Nikolay Aleksandrov80e73cc2016-06-28 16:57:05 +02005683 int attr = IFLA_STATS_LINK_XSTATS;
Nikolay Aleksandrov97a47fa2016-04-30 10:25:27 +02005684
5685 if (ops && ops->get_linkxstats_size) {
Nikolay Aleksandrov80e73cc2016-06-28 16:57:05 +02005686 size += nla_total_size(ops->get_linkxstats_size(dev,
5687 attr));
Nikolay Aleksandrov97a47fa2016-04-30 10:25:27 +02005688 /* for IFLA_STATS_LINK_XSTATS */
5689 size += nla_total_size(0);
5690 }
5691 }
5692
Nikolay Aleksandrov80e73cc2016-06-28 16:57:05 +02005693 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5694 struct net_device *_dev = (struct net_device *)dev;
5695 const struct rtnl_link_ops *ops = NULL;
5696 const struct net_device *master;
5697
5698 /* netdev_master_upper_dev_get can't take const */
5699 master = netdev_master_upper_dev_get(_dev);
5700 if (master)
5701 ops = master->rtnl_link_ops;
5702 if (ops && ops->get_linkxstats_size) {
5703 int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5704
5705 size += nla_total_size(ops->get_linkxstats_size(dev,
5706 attr));
5707 /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5708 size += nla_total_size(0);
5709 }
5710 }
5711
Petr Machata46efc972022-03-02 18:31:17 +02005712 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
5713 u32 off_filter_mask;
5714
5715 off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
5716 size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
5717 }
Nogah Frankel69ae6ad2016-09-16 15:05:37 +02005718
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005719 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5720 struct rtnl_af_ops *af_ops;
5721
5722 /* for IFLA_STATS_AF_SPEC */
5723 size += nla_total_size(0);
5724
Florian Westphal5fa85a02017-10-16 15:44:36 +02005725 rcu_read_lock();
5726 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005727 if (af_ops->get_stats_af_size) {
5728 size += nla_total_size(
5729 af_ops->get_stats_af_size(dev));
5730
5731 /* for AF_* */
5732 size += nla_total_size(0);
5733 }
5734 }
Florian Westphal5fa85a02017-10-16 15:44:36 +02005735 rcu_read_unlock();
Robert Shearmanaefb4d42017-01-16 14:16:36 +00005736 }
5737
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005738 return size;
5739}
5740
Petr Machata46efc972022-03-02 18:31:17 +02005741#define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
5742
5743static const struct nla_policy
5744rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
5745 [IFLA_STATS_LINK_OFFLOAD_XSTATS] =
5746 NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
5747};
5748
5749static const struct nla_policy
5750rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
5751 [IFLA_STATS_GET_FILTERS] =
5752 NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
5753};
5754
Petr Machata03ba3562022-03-02 18:31:22 +02005755static const struct nla_policy
5756ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
Petr Machata5fd0b832022-03-02 18:31:23 +02005757 [IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
Petr Machata03ba3562022-03-02 18:31:22 +02005758};
5759
Petr Machata46efc972022-03-02 18:31:17 +02005760static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
5761 struct rtnl_stats_dump_filters *filters,
5762 struct netlink_ext_ack *extack)
5763{
5764 struct nlattr *tb[IFLA_STATS_MAX + 1];
5765 int err;
5766 int at;
5767
5768 err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
5769 rtnl_stats_get_policy_filters, extack);
5770 if (err < 0)
5771 return err;
5772
5773 for (at = 1; at <= IFLA_STATS_MAX; at++) {
5774 if (tb[at]) {
5775 if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
5776 NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
5777 return -EINVAL;
5778 }
5779 filters->mask[at] = nla_get_u32(tb[at]);
5780 }
5781 }
5782
5783 return 0;
5784}
5785
5786static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
5787 u32 filter_mask,
5788 struct rtnl_stats_dump_filters *filters,
5789 struct netlink_ext_ack *extack)
5790{
5791 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
5792 int err;
5793 int i;
5794
5795 filters->mask[0] = filter_mask;
5796 for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
5797 filters->mask[i] = -1U;
5798
5799 err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
5800 IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
5801 if (err < 0)
5802 return err;
5803
5804 if (tb[IFLA_STATS_GET_FILTERS]) {
5805 err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
5806 filters, extack);
5807 if (err)
5808 return err;
5809 }
5810
5811 return 0;
5812}
5813
Jakub Kicinski51bc8602019-01-18 10:46:14 -08005814static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5815 bool is_dump, struct netlink_ext_ack *extack)
5816{
5817 struct if_stats_msg *ifsm;
5818
Eric Dumazet69f23a02019-04-14 11:02:05 -07005819 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
Jakub Kicinski51bc8602019-01-18 10:46:14 -08005820 NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5821 return -EINVAL;
5822 }
5823
5824 if (!strict_check)
5825 return 0;
5826
5827 ifsm = nlmsg_data(nlh);
5828
5829 /* only requests using strict checks can pass data to influence
5830 * the dump. The legacy exception is filter_mask.
5831 */
5832 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5833 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5834 return -EINVAL;
5835 }
Jakub Kicinski6300acb2019-01-18 10:46:15 -08005836 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5837 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5838 return -EINVAL;
5839 }
Jakub Kicinski51bc8602019-01-18 10:46:14 -08005840
5841 return 0;
5842}
5843
David Ahernc21ef3e2017-04-16 09:48:24 -07005844static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5845 struct netlink_ext_ack *extack)
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005846{
Petr Machata46efc972022-03-02 18:31:17 +02005847 struct rtnl_stats_dump_filters filters;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005848 struct net *net = sock_net(skb->sk);
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005849 struct net_device *dev = NULL;
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005850 int idxattr = 0, prividx = 0;
5851 struct if_stats_msg *ifsm;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005852 struct sk_buff *nskb;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005853 int err;
5854
Jakub Kicinski51bc8602019-01-18 10:46:14 -08005855 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5856 false, extack);
5857 if (err)
5858 return err;
Mathias Krause4775cc12016-12-28 17:52:15 +01005859
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005860 ifsm = nlmsg_data(nlh);
5861 if (ifsm->ifindex > 0)
5862 dev = __dev_get_by_index(net, ifsm->ifindex);
5863 else
5864 return -EINVAL;
5865
5866 if (!dev)
5867 return -ENODEV;
5868
Petr Machata46efc972022-03-02 18:31:17 +02005869 if (!ifsm->filter_mask) {
Petr Machata22b67d12022-02-16 15:31:36 +01005870 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005871 return -EINVAL;
Petr Machata22b67d12022-02-16 15:31:36 +01005872 }
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005873
Petr Machata46efc972022-03-02 18:31:17 +02005874 err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
5875 if (err)
5876 return err;
5877
5878 nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005879 if (!nskb)
5880 return -ENOBUFS;
5881
5882 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5883 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
Petr Machata05415bc2022-03-02 18:31:18 +02005884 0, &filters, &idxattr, &prividx, extack);
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005885 if (err < 0) {
5886 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5887 WARN_ON(err == -EMSGSIZE);
5888 kfree_skb(nskb);
5889 } else {
5890 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5891 }
5892
5893 return err;
5894}
5895
5896static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5897{
David Ahern841891e2018-10-07 20:16:32 -07005898 struct netlink_ext_ack *extack = cb->extack;
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005899 int h, s_h, err, s_idx, s_idxattr, s_prividx;
Petr Machata46efc972022-03-02 18:31:17 +02005900 struct rtnl_stats_dump_filters filters;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005901 struct net *net = sock_net(skb->sk);
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005902 unsigned int flags = NLM_F_MULTI;
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005903 struct if_stats_msg *ifsm;
5904 struct hlist_head *head;
5905 struct net_device *dev;
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005906 int idx = 0;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005907
5908 s_h = cb->args[0];
5909 s_idx = cb->args[1];
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005910 s_idxattr = cb->args[2];
5911 s_prividx = cb->args[3];
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005912
5913 cb->seq = net->dev_base_seq;
5914
Jakub Kicinski51bc8602019-01-18 10:46:14 -08005915 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5916 if (err)
5917 return err;
Mathias Krause4775cc12016-12-28 17:52:15 +01005918
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005919 ifsm = nlmsg_data(cb->nlh);
Petr Machata46efc972022-03-02 18:31:17 +02005920 if (!ifsm->filter_mask) {
David Ahern841891e2018-10-07 20:16:32 -07005921 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005922 return -EINVAL;
David Ahern841891e2018-10-07 20:16:32 -07005923 }
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005924
Petr Machata46efc972022-03-02 18:31:17 +02005925 err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
5926 extack);
5927 if (err)
5928 return err;
5929
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005930 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5931 idx = 0;
5932 head = &net->dev_index_head[h];
5933 hlist_for_each_entry(dev, head, index_hlist) {
5934 if (idx < s_idx)
5935 goto cont;
5936 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5937 NETLINK_CB(cb->skb).portid,
5938 cb->nlh->nlmsg_seq, 0,
Petr Machata46efc972022-03-02 18:31:17 +02005939 flags, &filters,
Petr Machata05415bc2022-03-02 18:31:18 +02005940 &s_idxattr, &s_prividx,
5941 extack);
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005942 /* If we ran out of room on the first message,
5943 * we're in trouble
5944 */
5945 WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5946
5947 if (err < 0)
5948 goto out;
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005949 s_prividx = 0;
5950 s_idxattr = 0;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005951 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5952cont:
5953 idx++;
5954 }
5955 }
5956out:
Nikolay Aleksandrove8872a22016-04-30 10:25:26 +02005957 cb->args[3] = s_prividx;
5958 cb->args[2] = s_idxattr;
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07005959 cb->args[1] = idx;
5960 cb->args[0] = h;
5961
5962 return skb->len;
5963}
5964
Petr Machata5fd0b832022-03-02 18:31:23 +02005965void rtnl_offload_xstats_notify(struct net_device *dev)
5966{
5967 struct rtnl_stats_dump_filters response_filters = {};
5968 struct net *net = dev_net(dev);
5969 int idxattr = 0, prividx = 0;
5970 struct sk_buff *skb;
5971 int err = -ENOBUFS;
5972
5973 ASSERT_RTNL();
5974
5975 response_filters.mask[0] |=
5976 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
5977 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
5978 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
5979
5980 skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
5981 GFP_KERNEL);
5982 if (!skb)
5983 goto errout;
5984
5985 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
5986 &response_filters, &idxattr, &prividx, NULL);
5987 if (err < 0) {
5988 kfree_skb(skb);
5989 goto errout;
5990 }
5991
5992 rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
5993 return;
5994
5995errout:
5996 rtnl_set_sk_err(net, RTNLGRP_STATS, err);
5997}
5998EXPORT_SYMBOL(rtnl_offload_xstats_notify);
5999
Petr Machata03ba3562022-03-02 18:31:22 +02006000static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
6001 struct netlink_ext_ack *extack)
6002{
Petr Machata5fd0b832022-03-02 18:31:23 +02006003 enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
Petr Machata03ba3562022-03-02 18:31:22 +02006004 struct rtnl_stats_dump_filters response_filters = {};
6005 struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
6006 struct net *net = sock_net(skb->sk);
6007 struct net_device *dev = NULL;
Petr Machata03ba3562022-03-02 18:31:22 +02006008 struct if_stats_msg *ifsm;
Petr Machata5fd0b832022-03-02 18:31:23 +02006009 bool notify = false;
Petr Machata03ba3562022-03-02 18:31:22 +02006010 int err;
6011
6012 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
6013 false, extack);
6014 if (err)
6015 return err;
6016
6017 ifsm = nlmsg_data(nlh);
6018 if (ifsm->family != AF_UNSPEC) {
6019 NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
6020 return -EINVAL;
6021 }
6022
6023 if (ifsm->ifindex > 0)
6024 dev = __dev_get_by_index(net, ifsm->ifindex);
6025 else
6026 return -EINVAL;
6027
6028 if (!dev)
6029 return -ENODEV;
6030
6031 if (ifsm->filter_mask) {
6032 NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
6033 return -EINVAL;
6034 }
6035
6036 err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
6037 ifla_stats_set_policy, extack);
6038 if (err < 0)
6039 return err;
6040
Petr Machata5fd0b832022-03-02 18:31:23 +02006041 if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
6042 u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
Petr Machata03ba3562022-03-02 18:31:22 +02006043
Petr Machata5fd0b832022-03-02 18:31:23 +02006044 if (req)
6045 err = netdev_offload_xstats_enable(dev, t_l3, extack);
6046 else
6047 err = netdev_offload_xstats_disable(dev, t_l3);
6048
6049 if (!err)
6050 notify = true;
6051 else if (err != -EALREADY)
6052 return err;
6053
6054 response_filters.mask[0] |=
6055 IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
6056 response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
6057 IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
Petr Machata03ba3562022-03-02 18:31:22 +02006058 }
6059
Petr Machata5fd0b832022-03-02 18:31:23 +02006060 if (notify)
6061 rtnl_offload_xstats_notify(dev);
6062
6063 return 0;
Petr Machata03ba3562022-03-02 18:31:22 +02006064}
6065
Linus Torvalds1da177e2005-04-16 15:20:36 -07006066/* Process one rtnetlink message. */
6067
Johannes Berg2d4bc932017-04-12 14:34:04 +02006068static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
6069 struct netlink_ext_ack *extack)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006070{
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +09006071 struct net *net = sock_net(skb->sk);
Florian Westphaladdf9b92017-12-02 21:44:05 +01006072 struct rtnl_link *link;
Nikolay Aleksandrov12dc5c22022-04-13 13:51:51 +03006073 enum rtnl_kinds kind;
Florian Westphale4202512017-12-02 21:44:06 +01006074 struct module *owner;
Florian Westphal6853dd42017-08-09 20:41:51 +02006075 int err = -EOPNOTSUPP;
Thomas Grafe2849862007-03-22 11:48:11 -07006076 rtnl_doit_func doit;
Florian Westphal62256f92017-08-09 20:41:52 +02006077 unsigned int flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006078 int family;
6079 int type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006080
Linus Torvalds1da177e2005-04-16 15:20:36 -07006081 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006082 if (type > RTM_MAX)
Thomas Graf038890f2007-04-05 14:35:52 -07006083 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006084
6085 type -= RTM_BASE;
6086
6087 /* All the messages must have at least 1 byte length */
Hong zhi guo573ce262013-03-27 06:47:04 +00006088 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
Linus Torvalds1da177e2005-04-16 15:20:36 -07006089 return 0;
6090
Hong zhi guo573ce262013-03-27 06:47:04 +00006091 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
Nikolay Aleksandrov2e9ea3e2022-04-13 13:51:52 +03006092 kind = rtnl_msgtype_kind(type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006093
Nikolay Aleksandrov12dc5c22022-04-13 13:51:51 +03006094 if (kind != RTNL_KIND_GET && !netlink_net_capable(skb, CAP_NET_ADMIN))
Thomas Graf1d00a4e2007-03-22 23:30:12 -07006095 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006096
Florian Westphal6853dd42017-08-09 20:41:51 +02006097 rcu_read_lock();
Nikolay Aleksandrov12dc5c22022-04-13 13:51:51 +03006098 if (kind == RTNL_KIND_GET && (nlh->nlmsg_flags & NLM_F_DUMP)) {
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006099 struct sock *rtnl;
Thomas Grafe2849862007-03-22 11:48:11 -07006100 rtnl_dumpit_func dumpit;
Di Zhuebfe3c52020-10-21 10:00:53 +08006101 u32 min_dump_alloc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006102
Florian Westphaladdf9b92017-12-02 21:44:05 +01006103 link = rtnl_get_link(family, type);
6104 if (!link || !link->dumpit) {
Florian Westphal6853dd42017-08-09 20:41:51 +02006105 family = PF_UNSPEC;
Florian Westphaladdf9b92017-12-02 21:44:05 +01006106 link = rtnl_get_link(family, type);
6107 if (!link || !link->dumpit)
Florian Westphal6853dd42017-08-09 20:41:51 +02006108 goto err_unlock;
6109 }
Florian Westphale4202512017-12-02 21:44:06 +01006110 owner = link->owner;
Florian Westphaladdf9b92017-12-02 21:44:05 +01006111 dumpit = link->dumpit;
Florian Westphale1fa6d22017-08-09 20:41:47 +02006112
Florian Westphal5c2bb9b2017-08-10 16:52:58 +02006113 if (type == RTM_GETLINK - RTM_BASE)
Florian Westphale1fa6d22017-08-09 20:41:47 +02006114 min_dump_alloc = rtnl_calcit(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006115
Florian Westphale4202512017-12-02 21:44:06 +01006116 err = 0;
6117 /* need to do this before rcu_read_unlock() */
6118 if (!try_module_get(owner))
6119 err = -EPROTONOSUPPORT;
6120
Florian Westphal6853dd42017-08-09 20:41:51 +02006121 rcu_read_unlock();
6122
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006123 rtnl = net->rtnl;
Florian Westphale4202512017-12-02 21:44:06 +01006124 if (err == 0) {
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00006125 struct netlink_dump_control c = {
6126 .dump = dumpit,
6127 .min_dump_alloc = min_dump_alloc,
Florian Westphale4202512017-12-02 21:44:06 +01006128 .module = owner,
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00006129 };
6130 err = netlink_dump_start(rtnl, skb, nlh, &c);
Florian Westphale4202512017-12-02 21:44:06 +01006131 /* netlink_dump_start() will keep a reference on
6132 * module if dump is still in progress.
6133 */
6134 module_put(owner);
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00006135 }
Eric Dumazet2907c352011-05-25 07:34:04 +00006136 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006137 }
6138
Florian Westphaladdf9b92017-12-02 21:44:05 +01006139 link = rtnl_get_link(family, type);
6140 if (!link || !link->doit) {
Florian Westphal8caa38b2017-08-10 16:53:01 +02006141 family = PF_UNSPEC;
Florian Westphaladdf9b92017-12-02 21:44:05 +01006142 link = rtnl_get_link(PF_UNSPEC, type);
6143 if (!link || !link->doit)
6144 goto out_unlock;
Florian Westphal8caa38b2017-08-10 16:53:01 +02006145 }
6146
Florian Westphale4202512017-12-02 21:44:06 +01006147 owner = link->owner;
6148 if (!try_module_get(owner)) {
6149 err = -EPROTONOSUPPORT;
6150 goto out_unlock;
6151 }
6152
Florian Westphaladdf9b92017-12-02 21:44:05 +01006153 flags = link->flags;
Nikolay Aleksandrova6cec0b2022-04-13 13:51:55 +03006154 if (kind == RTNL_KIND_DEL && (nlh->nlmsg_flags & NLM_F_BULK) &&
6155 !(flags & RTNL_FLAG_BULK_DEL_SUPPORTED)) {
6156 NL_SET_ERR_MSG(extack, "Bulk delete is not supported");
Zhengchao Shao5b22f622022-08-15 10:46:29 +08006157 module_put(owner);
Nikolay Aleksandrova6cec0b2022-04-13 13:51:55 +03006158 goto err_unlock;
6159 }
6160
Florian Westphal62256f92017-08-09 20:41:52 +02006161 if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
Florian Westphaladdf9b92017-12-02 21:44:05 +01006162 doit = link->doit;
Florian Westphal62256f92017-08-09 20:41:52 +02006163 rcu_read_unlock();
6164 if (doit)
6165 err = doit(skb, nlh, extack);
Florian Westphale4202512017-12-02 21:44:06 +01006166 module_put(owner);
Florian Westphal62256f92017-08-09 20:41:52 +02006167 return err;
6168 }
Florian Westphal6853dd42017-08-09 20:41:51 +02006169 rcu_read_unlock();
6170
Florian Westphal0cc09022017-08-09 20:41:50 +02006171 rtnl_lock();
Florian Westphaladdf9b92017-12-02 21:44:05 +01006172 link = rtnl_get_link(family, type);
6173 if (link && link->doit)
6174 err = link->doit(skb, nlh, extack);
Florian Westphal0cc09022017-08-09 20:41:50 +02006175 rtnl_unlock();
Florian Westphaladdf9b92017-12-02 21:44:05 +01006176
Florian Westphale4202512017-12-02 21:44:06 +01006177 module_put(owner);
6178
Florian Westphaladdf9b92017-12-02 21:44:05 +01006179 return err;
6180
6181out_unlock:
6182 rcu_read_unlock();
Florian Westphal0cc09022017-08-09 20:41:50 +02006183 return err;
6184
6185err_unlock:
Florian Westphal6853dd42017-08-09 20:41:51 +02006186 rcu_read_unlock();
Florian Westphal0cc09022017-08-09 20:41:50 +02006187 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07006188}
6189
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07006190static void rtnetlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006191{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07006192 netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006193}
6194
Julien Gomes5f729ea2017-06-20 13:54:16 -07006195static int rtnetlink_bind(struct net *net, int group)
6196{
6197 switch (group) {
6198 case RTNLGRP_IPV4_MROUTE_R:
6199 case RTNLGRP_IPV6_MROUTE_R:
6200 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
6201 return -EPERM;
6202 break;
6203 }
6204 return 0;
6205}
6206
Linus Torvalds1da177e2005-04-16 15:20:36 -07006207static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
6208{
Jiri Pirko351638e2013-05-28 01:30:21 +00006209 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Eric W. Biedermane9dc8652007-09-12 13:02:17 +02006210
Linus Torvalds1da177e2005-04-16 15:20:36 -07006211 switch (event) {
Vlad Yasevich5138e862017-04-04 09:23:41 -04006212 case NETDEV_REBOOT:
Xin Long8a212582017-10-15 18:13:41 +08006213 case NETDEV_CHANGEMTU:
David Ahern37536542017-07-19 10:22:40 -07006214 case NETDEV_CHANGEADDR:
Vlad Yasevich5138e862017-04-04 09:23:41 -04006215 case NETDEV_CHANGENAME:
6216 case NETDEV_FEAT_CHANGE:
6217 case NETDEV_BONDING_FAILOVER:
Xin Longe6e66592017-10-15 18:13:43 +08006218 case NETDEV_POST_TYPE_CHANGE:
Vlad Yasevich5138e862017-04-04 09:23:41 -04006219 case NETDEV_NOTIFY_PEERS:
Xin Longdc709f32017-10-15 18:13:44 +08006220 case NETDEV_CHANGEUPPER:
Vlad Yasevich5138e862017-04-04 09:23:41 -04006221 case NETDEV_RESEND_IGMP:
Vlad Yasevich5138e862017-04-04 09:23:41 -04006222 case NETDEV_CHANGEINFODATA:
Xin Longeeda3fb2017-10-24 13:54:19 +08006223 case NETDEV_CHANGELOWERSTATE:
Xin Longebdcf042017-10-15 18:13:42 +08006224 case NETDEV_CHANGE_TX_QUEUE_LEN:
Vlad Yasevich3d3ea5a2017-05-27 10:14:34 -04006225 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
Hangbin Liu1d997f12022-10-28 04:42:21 -04006226 GFP_KERNEL, NULL, 0, 0, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006227 break;
6228 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -07006229 break;
6230 }
6231 return NOTIFY_DONE;
6232}
6233
6234static struct notifier_block rtnetlink_dev_notifier = {
6235 .notifier_call = rtnetlink_event,
6236};
6237
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006238
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00006239static int __net_init rtnetlink_net_init(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006240{
6241 struct sock *sk;
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00006242 struct netlink_kernel_cfg cfg = {
6243 .groups = RTNLGRP_MAX,
6244 .input = rtnetlink_rcv,
6245 .cb_mutex = &rtnl_mutex,
Pablo Neira Ayuso9785e102012-09-08 02:53:53 +00006246 .flags = NL_CFG_F_NONROOT_RECV,
Julien Gomes5f729ea2017-06-20 13:54:16 -07006247 .bind = rtnetlink_bind,
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00006248 };
6249
Pablo Neira Ayuso9f00d972012-09-08 02:53:54 +00006250 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006251 if (!sk)
6252 return -ENOMEM;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006253 net->rtnl = sk;
6254 return 0;
6255}
6256
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00006257static void __net_exit rtnetlink_net_exit(struct net *net)
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006258{
Denis V. Lunev775516b2008-01-18 23:55:19 -08006259 netlink_kernel_release(net->rtnl);
6260 net->rtnl = NULL;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006261}
6262
6263static struct pernet_operations rtnetlink_net_ops = {
6264 .init = rtnetlink_net_init,
6265 .exit = rtnetlink_net_exit,
6266};
6267
Linus Torvalds1da177e2005-04-16 15:20:36 -07006268void __init rtnetlink_init(void)
6269{
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006270 if (register_pernet_subsys(&rtnetlink_net_ops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07006271 panic("rtnetlink_init: cannot initialize rtnetlink\n");
Denis V. Lunev97c53ca2007-11-19 22:26:51 -08006272
Linus Torvalds1da177e2005-04-16 15:20:36 -07006273 register_netdevice_notifier(&rtnetlink_dev_notifier);
Thomas Graf340d17f2007-03-22 11:49:22 -07006274
Greg Rosec7ac8672011-06-10 01:27:09 +00006275 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
Florian Westphalb97bac62017-08-09 20:41:48 +02006276 rtnl_dump_ifinfo, 0);
6277 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
6278 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
6279 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
Thomas Graf687ad8c2007-03-22 11:59:42 -07006280
Florian Westphalb97bac62017-08-09 20:41:48 +02006281 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
6282 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
6283 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
John Fastabend77162022012-04-15 06:43:56 +00006284
Jiri Pirko36fbf1e2019-09-30 11:48:16 +02006285 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
6286 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
6287
Florian Westphalb97bac62017-08-09 20:41:48 +02006288 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
Nikolay Aleksandrov9e834252022-04-13 13:51:57 +03006289 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL,
6290 RTNL_FLAG_BULK_DEL_SUPPORTED);
Roopa Prabhu5b2f94b2018-12-15 22:35:08 -08006291 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
John Fastabende5a55a82012-10-24 08:12:57 +00006292
Florian Westphalb97bac62017-08-09 20:41:48 +02006293 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
6294 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
6295 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
Roopa Prabhu10c9ead2016-04-20 08:43:43 -07006296
6297 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
Florian Westphalb97bac62017-08-09 20:41:48 +02006298 0);
Petr Machata03ba3562022-03-02 18:31:22 +02006299 rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07006300}