Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0-or-later
2 : /*
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 : *
11 : * Fixes:
12 : * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
13 : */
14 :
15 : #include <linux/bitops.h>
16 : #include <linux/errno.h>
17 : #include <linux/module.h>
18 : #include <linux/types.h>
19 : #include <linux/socket.h>
20 : #include <linux/kernel.h>
21 : #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>
33 : #include <linux/mutex.h>
34 : #include <linux/if_addr.h>
35 : #include <linux/if_bridge.h>
36 : #include <linux/if_vlan.h>
37 : #include <linux/pci.h>
38 : #include <linux/etherdevice.h>
39 : #include <linux/bpf.h>
40 :
41 : #include <linux/uaccess.h>
42 :
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>
50 : #include <net/tcp.h>
51 : #include <net/sock.h>
52 : #include <net/pkt_sched.h>
53 : #include <net/fib_rules.h>
54 : #include <net/rtnetlink.h>
55 : #include <net/net_namespace.h>
56 :
57 : #define RTNL_MAX_TYPE 50
58 : #define RTNL_SLAVE_MAX_TYPE 40
59 :
60 : struct rtnl_link {
61 : rtnl_doit_func doit;
62 : rtnl_dumpit_func dumpit;
63 : struct module *owner;
64 : unsigned int flags;
65 : struct rcu_head rcu;
66 : };
67 :
68 : static DEFINE_MUTEX(rtnl_mutex);
69 :
70 67 : void rtnl_lock(void)
71 : {
72 19 : mutex_lock(&rtnl_mutex);
73 19 : }
74 : EXPORT_SYMBOL(rtnl_lock);
75 :
76 2 : int rtnl_lock_killable(void)
77 : {
78 2 : return mutex_lock_killable(&rtnl_mutex);
79 : }
80 : EXPORT_SYMBOL(rtnl_lock_killable);
81 :
82 : static struct sk_buff *defer_kfree_skb_list;
83 0 : void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail)
84 : {
85 0 : if (head && tail) {
86 0 : tail->next = defer_kfree_skb_list;
87 0 : defer_kfree_skb_list = head;
88 : }
89 0 : }
90 : EXPORT_SYMBOL(rtnl_kfree_skbs);
91 :
92 69 : void __rtnl_unlock(void)
93 : {
94 69 : struct sk_buff *head = defer_kfree_skb_list;
95 :
96 69 : defer_kfree_skb_list = NULL;
97 :
98 69 : mutex_unlock(&rtnl_mutex);
99 :
100 69 : while (head) {
101 0 : struct sk_buff *next = head->next;
102 :
103 0 : kfree_skb(head);
104 0 : cond_resched();
105 0 : head = next;
106 : }
107 69 : }
108 :
109 69 : void rtnl_unlock(void)
110 : {
111 : /* This fellow will unlock it for us. */
112 21 : netdev_run_todo();
113 21 : }
114 : EXPORT_SYMBOL(rtnl_unlock);
115 :
116 0 : int rtnl_trylock(void)
117 : {
118 0 : return mutex_trylock(&rtnl_mutex);
119 : }
120 : EXPORT_SYMBOL(rtnl_trylock);
121 :
122 89 : int rtnl_is_locked(void)
123 : {
124 57 : return mutex_is_locked(&rtnl_mutex);
125 : }
126 : EXPORT_SYMBOL(rtnl_is_locked);
127 :
128 0 : bool refcount_dec_and_rtnl_lock(refcount_t *r)
129 : {
130 0 : return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
131 : }
132 : EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
133 :
134 : #ifdef CONFIG_PROVE_LOCKING
135 4627 : bool lockdep_rtnl_is_held(void)
136 : {
137 4627 : return lockdep_is_held(&rtnl_mutex);
138 : }
139 : EXPORT_SYMBOL(lockdep_rtnl_is_held);
140 : #endif /* #ifdef CONFIG_PROVE_LOCKING */
141 :
142 : static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1];
143 :
144 38 : static inline int rtm_msgindex(int msgtype)
145 : {
146 38 : int msgindex = msgtype - RTM_BASE;
147 :
148 : /*
149 : * msgindex < 0 implies someone tried to register a netlink
150 : * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
151 : * the message type has not been added to linux/rtnetlink.h
152 : */
153 38 : BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
154 :
155 38 : return msgindex;
156 : }
157 :
158 53 : static struct rtnl_link *rtnl_get_link(int protocol, int msgtype)
159 : {
160 53 : struct rtnl_link __rcu **tab;
161 :
162 53 : if (protocol >= ARRAY_SIZE(rtnl_msg_handlers))
163 0 : protocol = PF_UNSPEC;
164 :
165 106 : tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]);
166 53 : if (!tab)
167 0 : tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]);
168 :
169 106 : return rcu_dereference_rtnl(tab[msgtype]);
170 : }
171 :
172 38 : static int rtnl_register_internal(struct module *owner,
173 : int protocol, int msgtype,
174 : rtnl_doit_func doit, rtnl_dumpit_func dumpit,
175 : unsigned int flags)
176 : {
177 38 : struct rtnl_link *link, *old;
178 38 : struct rtnl_link __rcu **tab;
179 38 : int msgindex;
180 38 : int ret = -ENOBUFS;
181 :
182 38 : BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
183 38 : msgindex = rtm_msgindex(msgtype);
184 :
185 38 : rtnl_lock();
186 76 : tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
187 38 : if (tab == NULL) {
188 4 : tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL);
189 4 : if (!tab)
190 0 : goto unlock;
191 :
192 : /* ensures we see the 0 stores */
193 4 : rcu_assign_pointer(rtnl_msg_handlers[protocol], tab);
194 : }
195 :
196 76 : old = rtnl_dereference(tab[msgindex]);
197 38 : if (old) {
198 1 : link = kmemdup(old, sizeof(*old), GFP_KERNEL);
199 1 : if (!link)
200 0 : goto unlock;
201 : } else {
202 37 : link = kzalloc(sizeof(*link), GFP_KERNEL);
203 37 : if (!link)
204 0 : goto unlock;
205 : }
206 :
207 76 : WARN_ON(link->owner && link->owner != owner);
208 38 : link->owner = owner;
209 :
210 76 : WARN_ON(doit && link->doit && link->doit != doit);
211 38 : if (doit)
212 29 : link->doit = doit;
213 76 : WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit);
214 38 : if (dumpit)
215 16 : link->dumpit = dumpit;
216 :
217 38 : link->flags |= flags;
218 :
219 : /* publish protocol:msgtype */
220 38 : rcu_assign_pointer(tab[msgindex], link);
221 38 : ret = 0;
222 38 : if (old)
223 1 : kfree_rcu(old, rcu);
224 37 : unlock:
225 38 : rtnl_unlock();
226 38 : return ret;
227 : }
228 :
229 : /**
230 : * rtnl_register_module - Register a rtnetlink message type
231 : *
232 : * @owner: module registering the hook (THIS_MODULE)
233 : * @protocol: Protocol family or PF_UNSPEC
234 : * @msgtype: rtnetlink message type
235 : * @doit: Function pointer called for each request message
236 : * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
237 : * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
238 : *
239 : * Like rtnl_register, but for use by removable modules.
240 : */
241 0 : int rtnl_register_module(struct module *owner,
242 : int protocol, int msgtype,
243 : rtnl_doit_func doit, rtnl_dumpit_func dumpit,
244 : unsigned int flags)
245 : {
246 0 : return rtnl_register_internal(owner, protocol, msgtype,
247 : doit, dumpit, flags);
248 : }
249 : EXPORT_SYMBOL_GPL(rtnl_register_module);
250 :
251 : /**
252 : * rtnl_register - Register a rtnetlink message type
253 : * @protocol: Protocol family or PF_UNSPEC
254 : * @msgtype: rtnetlink message type
255 : * @doit: Function pointer called for each request message
256 : * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
257 : * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions
258 : *
259 : * Registers the specified function pointers (at least one of them has
260 : * to be non-NULL) to be called whenever a request message for the
261 : * specified protocol family and message type is received.
262 : *
263 : * The special protocol family PF_UNSPEC may be used to define fallback
264 : * function pointers for the case when no entry for the specific protocol
265 : * family exists.
266 : */
267 38 : void rtnl_register(int protocol, int msgtype,
268 : rtnl_doit_func doit, rtnl_dumpit_func dumpit,
269 : unsigned int flags)
270 : {
271 38 : int err;
272 :
273 38 : err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit,
274 : flags);
275 38 : if (err)
276 0 : pr_err("Unable to register rtnetlink message handler, "
277 : "protocol = %d, message type = %d\n", protocol, msgtype);
278 38 : }
279 :
280 : /**
281 : * rtnl_unregister - Unregister a rtnetlink message type
282 : * @protocol: Protocol family or PF_UNSPEC
283 : * @msgtype: rtnetlink message type
284 : *
285 : * Returns 0 on success or a negative error code.
286 : */
287 0 : int rtnl_unregister(int protocol, int msgtype)
288 : {
289 0 : struct rtnl_link __rcu **tab;
290 0 : struct rtnl_link *link;
291 0 : int msgindex;
292 :
293 0 : BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
294 0 : msgindex = rtm_msgindex(msgtype);
295 :
296 0 : rtnl_lock();
297 0 : tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
298 0 : if (!tab) {
299 0 : rtnl_unlock();
300 0 : return -ENOENT;
301 : }
302 :
303 0 : link = rtnl_dereference(tab[msgindex]);
304 0 : rcu_assign_pointer(tab[msgindex], NULL);
305 0 : rtnl_unlock();
306 :
307 0 : kfree_rcu(link, rcu);
308 :
309 : return 0;
310 : }
311 : EXPORT_SYMBOL_GPL(rtnl_unregister);
312 :
313 : /**
314 : * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
315 : * @protocol : Protocol family or PF_UNSPEC
316 : *
317 : * Identical to calling rtnl_unregster() for all registered message types
318 : * of a certain protocol family.
319 : */
320 0 : void rtnl_unregister_all(int protocol)
321 : {
322 0 : struct rtnl_link __rcu **tab;
323 0 : struct rtnl_link *link;
324 0 : int msgindex;
325 :
326 0 : BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX);
327 :
328 0 : rtnl_lock();
329 0 : tab = rtnl_dereference(rtnl_msg_handlers[protocol]);
330 0 : if (!tab) {
331 0 : rtnl_unlock();
332 0 : return;
333 : }
334 0 : RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL);
335 0 : for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) {
336 0 : link = rtnl_dereference(tab[msgindex]);
337 0 : if (!link)
338 0 : continue;
339 :
340 0 : rcu_assign_pointer(tab[msgindex], NULL);
341 0 : kfree_rcu(link, rcu);
342 : }
343 0 : rtnl_unlock();
344 :
345 0 : synchronize_net();
346 :
347 0 : kfree(tab);
348 : }
349 : EXPORT_SYMBOL_GPL(rtnl_unregister_all);
350 :
351 : static LIST_HEAD(link_ops);
352 :
353 0 : static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind)
354 : {
355 0 : const struct rtnl_link_ops *ops;
356 :
357 0 : list_for_each_entry(ops, &link_ops, list) {
358 0 : if (!strcmp(ops->kind, kind))
359 0 : return ops;
360 : }
361 : return NULL;
362 : }
363 :
364 : /**
365 : * __rtnl_link_register - Register rtnl_link_ops with rtnetlink.
366 : * @ops: struct rtnl_link_ops * to register
367 : *
368 : * The caller must hold the rtnl_mutex. This function should be used
369 : * by drivers that create devices during module initialization. It
370 : * must be called before registering the devices.
371 : *
372 : * Returns 0 on success or a negative error code.
373 : */
374 0 : int __rtnl_link_register(struct rtnl_link_ops *ops)
375 : {
376 0 : if (rtnl_link_ops_get(ops->kind))
377 : return -EEXIST;
378 :
379 : /* The check for setup is here because if ops
380 : * does not have that filled up, it is not possible
381 : * to use the ops for creating device. So do not
382 : * fill up dellink as well. That disables rtnl_dellink.
383 : */
384 0 : if (ops->setup && !ops->dellink)
385 0 : ops->dellink = unregister_netdevice_queue;
386 :
387 0 : list_add_tail(&ops->list, &link_ops);
388 0 : return 0;
389 : }
390 : EXPORT_SYMBOL_GPL(__rtnl_link_register);
391 :
392 : /**
393 : * rtnl_link_register - Register rtnl_link_ops with rtnetlink.
394 : * @ops: struct rtnl_link_ops * to register
395 : *
396 : * Returns 0 on success or a negative error code.
397 : */
398 0 : int rtnl_link_register(struct rtnl_link_ops *ops)
399 : {
400 0 : int err;
401 :
402 : /* Sanity-check max sizes to avoid stack buffer overflow. */
403 0 : if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE ||
404 : ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE))
405 : return -EINVAL;
406 :
407 0 : rtnl_lock();
408 0 : err = __rtnl_link_register(ops);
409 0 : rtnl_unlock();
410 0 : return err;
411 : }
412 : EXPORT_SYMBOL_GPL(rtnl_link_register);
413 :
414 0 : static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops)
415 : {
416 0 : struct net_device *dev;
417 0 : LIST_HEAD(list_kill);
418 :
419 0 : for_each_netdev(net, dev) {
420 0 : if (dev->rtnl_link_ops == ops)
421 0 : ops->dellink(dev, &list_kill);
422 : }
423 0 : unregister_netdevice_many(&list_kill);
424 0 : }
425 :
426 : /**
427 : * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
428 : * @ops: struct rtnl_link_ops * to unregister
429 : *
430 : * The caller must hold the rtnl_mutex and guarantee net_namespace_list
431 : * integrity (hold pernet_ops_rwsem for writing to close the race
432 : * with setup_net() and cleanup_net()).
433 : */
434 0 : void __rtnl_link_unregister(struct rtnl_link_ops *ops)
435 : {
436 0 : struct net *net;
437 :
438 0 : for_each_net(net) {
439 0 : __rtnl_kill_links(net, ops);
440 : }
441 0 : list_del(&ops->list);
442 0 : }
443 : EXPORT_SYMBOL_GPL(__rtnl_link_unregister);
444 :
445 : /* Return with the rtnl_lock held when there are no network
446 : * devices unregistering in any network namespace.
447 : */
448 0 : static void rtnl_lock_unregistering_all(void)
449 : {
450 0 : struct net *net;
451 0 : bool unregistering;
452 0 : DEFINE_WAIT_FUNC(wait, woken_wake_function);
453 :
454 0 : add_wait_queue(&netdev_unregistering_wq, &wait);
455 0 : for (;;) {
456 0 : unregistering = false;
457 0 : rtnl_lock();
458 : /* We held write locked pernet_ops_rwsem, and parallel
459 : * setup_net() and cleanup_net() are not possible.
460 : */
461 0 : for_each_net(net) {
462 0 : if (net->dev_unreg_count > 0) {
463 : unregistering = true;
464 : break;
465 : }
466 : }
467 0 : if (!unregistering)
468 : break;
469 0 : __rtnl_unlock();
470 :
471 0 : wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
472 : }
473 0 : remove_wait_queue(&netdev_unregistering_wq, &wait);
474 0 : }
475 :
476 : /**
477 : * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
478 : * @ops: struct rtnl_link_ops * to unregister
479 : */
480 0 : void rtnl_link_unregister(struct rtnl_link_ops *ops)
481 : {
482 : /* Close the race with setup_net() and cleanup_net() */
483 0 : down_write(&pernet_ops_rwsem);
484 0 : rtnl_lock_unregistering_all();
485 0 : __rtnl_link_unregister(ops);
486 0 : rtnl_unlock();
487 0 : up_write(&pernet_ops_rwsem);
488 0 : }
489 : EXPORT_SYMBOL_GPL(rtnl_link_unregister);
490 :
491 0 : static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev)
492 : {
493 0 : struct net_device *master_dev;
494 0 : const struct rtnl_link_ops *ops;
495 0 : size_t size = 0;
496 :
497 0 : rcu_read_lock();
498 :
499 0 : master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
500 0 : if (!master_dev)
501 0 : goto out;
502 :
503 0 : ops = master_dev->rtnl_link_ops;
504 0 : if (!ops || !ops->get_slave_size)
505 0 : goto out;
506 : /* IFLA_INFO_SLAVE_DATA + nested data */
507 0 : size = nla_total_size(sizeof(struct nlattr)) +
508 0 : ops->get_slave_size(master_dev, dev);
509 :
510 0 : out:
511 0 : rcu_read_unlock();
512 0 : return size;
513 : }
514 :
515 4 : static size_t rtnl_link_get_size(const struct net_device *dev)
516 : {
517 4 : const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
518 4 : size_t size;
519 :
520 4 : if (!ops)
521 : return 0;
522 :
523 0 : size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */
524 0 : nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */
525 :
526 0 : if (ops->get_size)
527 : /* IFLA_INFO_DATA + nested data */
528 0 : size += nla_total_size(sizeof(struct nlattr)) +
529 0 : ops->get_size(dev);
530 :
531 0 : if (ops->get_xstats_size)
532 : /* IFLA_INFO_XSTATS */
533 0 : size += nla_total_size(ops->get_xstats_size(dev));
534 :
535 0 : size += rtnl_link_get_slave_info_data_size(dev);
536 :
537 0 : return size;
538 : }
539 :
540 : static LIST_HEAD(rtnl_af_ops);
541 :
542 0 : static const struct rtnl_af_ops *rtnl_af_lookup(const int family)
543 : {
544 0 : const struct rtnl_af_ops *ops;
545 :
546 0 : list_for_each_entry_rcu(ops, &rtnl_af_ops, list) {
547 0 : if (ops->family == family)
548 : return ops;
549 : }
550 :
551 : return NULL;
552 : }
553 :
554 : /**
555 : * rtnl_af_register - Register rtnl_af_ops with rtnetlink.
556 : * @ops: struct rtnl_af_ops * to register
557 : *
558 : * Returns 0 on success or a negative error code.
559 : */
560 1 : void rtnl_af_register(struct rtnl_af_ops *ops)
561 : {
562 1 : rtnl_lock();
563 1 : list_add_tail_rcu(&ops->list, &rtnl_af_ops);
564 1 : rtnl_unlock();
565 1 : }
566 : EXPORT_SYMBOL_GPL(rtnl_af_register);
567 :
568 : /**
569 : * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink.
570 : * @ops: struct rtnl_af_ops * to unregister
571 : */
572 0 : void rtnl_af_unregister(struct rtnl_af_ops *ops)
573 : {
574 0 : rtnl_lock();
575 0 : list_del_rcu(&ops->list);
576 0 : rtnl_unlock();
577 :
578 0 : synchronize_rcu();
579 0 : }
580 : EXPORT_SYMBOL_GPL(rtnl_af_unregister);
581 :
582 4 : static size_t rtnl_link_get_af_size(const struct net_device *dev,
583 : u32 ext_filter_mask)
584 : {
585 4 : struct rtnl_af_ops *af_ops;
586 4 : size_t size;
587 :
588 : /* IFLA_AF_SPEC */
589 4 : size = nla_total_size(sizeof(struct nlattr));
590 :
591 4 : rcu_read_lock();
592 7 : list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
593 3 : if (af_ops->get_link_af_size) {
594 : /* AF_* + nested data */
595 3 : size += nla_total_size(sizeof(struct nlattr)) +
596 3 : af_ops->get_link_af_size(dev, ext_filter_mask);
597 : }
598 : }
599 4 : rcu_read_unlock();
600 :
601 4 : return size;
602 : }
603 :
604 16 : static bool rtnl_have_link_slave_info(const struct net_device *dev)
605 : {
606 16 : struct net_device *master_dev;
607 16 : bool ret = false;
608 :
609 16 : rcu_read_lock();
610 :
611 16 : master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev);
612 16 : if (master_dev && master_dev->rtnl_link_ops)
613 0 : ret = true;
614 16 : rcu_read_unlock();
615 16 : return ret;
616 : }
617 :
618 0 : static int rtnl_link_slave_info_fill(struct sk_buff *skb,
619 : const struct net_device *dev)
620 : {
621 0 : struct net_device *master_dev;
622 0 : const struct rtnl_link_ops *ops;
623 0 : struct nlattr *slave_data;
624 0 : int err;
625 :
626 0 : master_dev = netdev_master_upper_dev_get((struct net_device *) dev);
627 0 : if (!master_dev)
628 : return 0;
629 0 : ops = master_dev->rtnl_link_ops;
630 0 : if (!ops)
631 : return 0;
632 0 : if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0)
633 : return -EMSGSIZE;
634 0 : if (ops->fill_slave_info) {
635 0 : slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA);
636 0 : if (!slave_data)
637 : return -EMSGSIZE;
638 0 : err = ops->fill_slave_info(skb, master_dev, dev);
639 0 : if (err < 0)
640 0 : goto err_cancel_slave_data;
641 0 : nla_nest_end(skb, slave_data);
642 : }
643 : return 0;
644 :
645 0 : err_cancel_slave_data:
646 0 : nla_nest_cancel(skb, slave_data);
647 0 : return err;
648 : }
649 :
650 0 : static int rtnl_link_info_fill(struct sk_buff *skb,
651 : const struct net_device *dev)
652 : {
653 0 : const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
654 0 : struct nlattr *data;
655 0 : int err;
656 :
657 0 : if (!ops)
658 : return 0;
659 0 : if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0)
660 : return -EMSGSIZE;
661 0 : if (ops->fill_xstats) {
662 0 : err = ops->fill_xstats(skb, dev);
663 0 : if (err < 0)
664 : return err;
665 : }
666 0 : if (ops->fill_info) {
667 0 : data = nla_nest_start_noflag(skb, IFLA_INFO_DATA);
668 0 : if (data == NULL)
669 : return -EMSGSIZE;
670 0 : err = ops->fill_info(skb, dev);
671 0 : if (err < 0)
672 0 : goto err_cancel_data;
673 0 : nla_nest_end(skb, data);
674 : }
675 : return 0;
676 :
677 0 : err_cancel_data:
678 0 : nla_nest_cancel(skb, data);
679 0 : return err;
680 : }
681 :
682 0 : static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev)
683 : {
684 0 : struct nlattr *linkinfo;
685 0 : int err = -EMSGSIZE;
686 :
687 0 : linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO);
688 0 : if (linkinfo == NULL)
689 0 : goto out;
690 :
691 0 : err = rtnl_link_info_fill(skb, dev);
692 0 : if (err < 0)
693 0 : goto err_cancel_link;
694 :
695 0 : err = rtnl_link_slave_info_fill(skb, dev);
696 0 : if (err < 0)
697 0 : goto err_cancel_link;
698 :
699 0 : nla_nest_end(skb, linkinfo);
700 0 : return 0;
701 :
702 0 : err_cancel_link:
703 0 : nla_nest_cancel(skb, linkinfo);
704 : out:
705 : return err;
706 : }
707 :
708 0 : int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo)
709 : {
710 0 : struct sock *rtnl = net->rtnl;
711 0 : int err = 0;
712 :
713 0 : NETLINK_CB(skb).dst_group = group;
714 0 : if (echo)
715 0 : refcount_inc(&skb->users);
716 0 : netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
717 0 : if (echo)
718 0 : err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
719 0 : return err;
720 : }
721 :
722 0 : int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid)
723 : {
724 0 : struct sock *rtnl = net->rtnl;
725 :
726 0 : return nlmsg_unicast(rtnl, skb, pid);
727 : }
728 : EXPORT_SYMBOL(rtnl_unicast);
729 :
730 27 : void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
731 : struct nlmsghdr *nlh, gfp_t flags)
732 : {
733 27 : struct sock *rtnl = net->rtnl;
734 27 : int report = 0;
735 :
736 23 : if (nlh)
737 4 : report = nlmsg_report(nlh);
738 :
739 23 : nlmsg_notify(rtnl, skb, pid, group, report, flags);
740 0 : }
741 : EXPORT_SYMBOL(rtnl_notify);
742 :
743 0 : void rtnl_set_sk_err(struct net *net, u32 group, int error)
744 : {
745 0 : struct sock *rtnl = net->rtnl;
746 :
747 0 : netlink_set_err(rtnl, 0, group, error);
748 0 : }
749 : EXPORT_SYMBOL(rtnl_set_sk_err);
750 :
751 19 : int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
752 : {
753 19 : struct nlattr *mx;
754 19 : int i, valid = 0;
755 :
756 : /* nothing is dumped for dst_default_metrics, so just skip the loop */
757 19 : if (metrics == dst_default_metrics.metrics)
758 : return 0;
759 :
760 0 : mx = nla_nest_start_noflag(skb, RTA_METRICS);
761 0 : if (mx == NULL)
762 : return -ENOBUFS;
763 :
764 0 : for (i = 0; i < RTAX_MAX; i++) {
765 0 : if (metrics[i]) {
766 0 : if (i == RTAX_CC_ALGO - 1) {
767 0 : char tmp[TCP_CA_NAME_MAX], *name;
768 :
769 0 : name = tcp_ca_get_name_by_key(metrics[i], tmp);
770 0 : if (!name)
771 0 : continue;
772 0 : if (nla_put_string(skb, i + 1, name))
773 0 : goto nla_put_failure;
774 0 : } else if (i == RTAX_FEATURES - 1) {
775 0 : u32 user_features = metrics[i] & RTAX_FEATURE_MASK;
776 :
777 0 : if (!user_features)
778 0 : continue;
779 0 : BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK);
780 0 : if (nla_put_u32(skb, i + 1, user_features))
781 0 : goto nla_put_failure;
782 : } else {
783 0 : if (nla_put_u32(skb, i + 1, metrics[i]))
784 0 : goto nla_put_failure;
785 : }
786 0 : valid++;
787 : }
788 : }
789 :
790 0 : if (!valid) {
791 0 : nla_nest_cancel(skb, mx);
792 0 : return 0;
793 : }
794 :
795 0 : return nla_nest_end(skb, mx);
796 :
797 0 : nla_put_failure:
798 0 : nla_nest_cancel(skb, mx);
799 0 : return -EMSGSIZE;
800 : }
801 : EXPORT_SYMBOL(rtnetlink_put_metrics);
802 :
803 0 : int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
804 : long expires, u32 error)
805 : {
806 0 : struct rta_cacheinfo ci = {
807 : .rta_error = error,
808 : .rta_id = id,
809 : };
810 :
811 0 : if (dst) {
812 0 : ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse);
813 0 : ci.rta_used = dst->__use;
814 0 : ci.rta_clntref = atomic_read(&dst->__refcnt);
815 : }
816 0 : if (expires) {
817 0 : unsigned long clock;
818 :
819 0 : clock = jiffies_to_clock_t(abs(expires));
820 0 : clock = min_t(unsigned long, clock, INT_MAX);
821 0 : ci.rta_expires = (expires > 0) ? clock : -clock;
822 : }
823 0 : return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
824 : }
825 : EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
826 :
827 0 : static void set_operstate(struct net_device *dev, unsigned char transition)
828 : {
829 0 : unsigned char operstate = dev->operstate;
830 :
831 0 : switch (transition) {
832 0 : case IF_OPER_UP:
833 0 : if ((operstate == IF_OPER_DORMANT ||
834 0 : operstate == IF_OPER_TESTING ||
835 0 : operstate == IF_OPER_UNKNOWN) &&
836 0 : !netif_dormant(dev) && !netif_testing(dev))
837 0 : operstate = IF_OPER_UP;
838 : break;
839 :
840 0 : case IF_OPER_TESTING:
841 0 : if (operstate == IF_OPER_UP ||
842 0 : operstate == IF_OPER_UNKNOWN)
843 0 : operstate = IF_OPER_TESTING;
844 : break;
845 :
846 0 : case IF_OPER_DORMANT:
847 0 : if (operstate == IF_OPER_UP ||
848 0 : operstate == IF_OPER_UNKNOWN)
849 0 : operstate = IF_OPER_DORMANT;
850 : break;
851 : }
852 :
853 0 : if (dev->operstate != operstate) {
854 0 : write_lock_bh(&dev_base_lock);
855 0 : dev->operstate = operstate;
856 0 : write_unlock_bh(&dev_base_lock);
857 0 : netdev_state_change(dev);
858 : }
859 0 : }
860 :
861 3 : static unsigned int rtnl_dev_get_flags(const struct net_device *dev)
862 : {
863 3 : return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) |
864 3 : (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI));
865 : }
866 :
867 3 : static unsigned int rtnl_dev_combine_flags(const struct net_device *dev,
868 : const struct ifinfomsg *ifm)
869 : {
870 3 : unsigned int flags = ifm->ifi_flags;
871 :
872 : /* bugwards compatibility: ifi_change == 0 is treated as ~0 */
873 3 : if (ifm->ifi_change)
874 3 : flags = (flags & ifm->ifi_change) |
875 3 : (rtnl_dev_get_flags(dev) & ~ifm->ifi_change);
876 :
877 3 : return flags;
878 : }
879 :
880 16 : static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
881 : const struct rtnl_link_stats64 *b)
882 : {
883 16 : a->rx_packets = b->rx_packets;
884 16 : a->tx_packets = b->tx_packets;
885 16 : a->rx_bytes = b->rx_bytes;
886 16 : a->tx_bytes = b->tx_bytes;
887 16 : a->rx_errors = b->rx_errors;
888 16 : a->tx_errors = b->tx_errors;
889 16 : a->rx_dropped = b->rx_dropped;
890 16 : a->tx_dropped = b->tx_dropped;
891 :
892 16 : a->multicast = b->multicast;
893 16 : a->collisions = b->collisions;
894 :
895 16 : a->rx_length_errors = b->rx_length_errors;
896 16 : a->rx_over_errors = b->rx_over_errors;
897 16 : a->rx_crc_errors = b->rx_crc_errors;
898 16 : a->rx_frame_errors = b->rx_frame_errors;
899 16 : a->rx_fifo_errors = b->rx_fifo_errors;
900 16 : a->rx_missed_errors = b->rx_missed_errors;
901 :
902 16 : a->tx_aborted_errors = b->tx_aborted_errors;
903 16 : a->tx_carrier_errors = b->tx_carrier_errors;
904 16 : a->tx_fifo_errors = b->tx_fifo_errors;
905 16 : a->tx_heartbeat_errors = b->tx_heartbeat_errors;
906 16 : a->tx_window_errors = b->tx_window_errors;
907 :
908 16 : a->rx_compressed = b->rx_compressed;
909 16 : a->tx_compressed = b->tx_compressed;
910 :
911 16 : a->rx_nohandler = b->rx_nohandler;
912 16 : }
913 :
914 : /* All VF info */
915 4 : static inline int rtnl_vfinfo_size(const struct net_device *dev,
916 : u32 ext_filter_mask)
917 : {
918 4 : if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
919 0 : int num_vfs = dev_num_vf(dev->dev.parent);
920 0 : size_t size = nla_total_size(0);
921 0 : size += num_vfs *
922 0 : (nla_total_size(0) +
923 0 : nla_total_size(sizeof(struct ifla_vf_mac)) +
924 0 : nla_total_size(sizeof(struct ifla_vf_broadcast)) +
925 0 : nla_total_size(sizeof(struct ifla_vf_vlan)) +
926 0 : nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */
927 0 : nla_total_size(MAX_VLAN_LIST_LEN *
928 0 : sizeof(struct ifla_vf_vlan_info)) +
929 0 : nla_total_size(sizeof(struct ifla_vf_spoofchk)) +
930 0 : nla_total_size(sizeof(struct ifla_vf_tx_rate)) +
931 0 : nla_total_size(sizeof(struct ifla_vf_rate)) +
932 0 : nla_total_size(sizeof(struct ifla_vf_link_state)) +
933 0 : nla_total_size(sizeof(struct ifla_vf_rss_query_en)) +
934 0 : nla_total_size(0) + /* nest IFLA_VF_STATS */
935 : /* IFLA_VF_STATS_RX_PACKETS */
936 0 : nla_total_size_64bit(sizeof(__u64)) +
937 : /* IFLA_VF_STATS_TX_PACKETS */
938 0 : nla_total_size_64bit(sizeof(__u64)) +
939 : /* IFLA_VF_STATS_RX_BYTES */
940 0 : nla_total_size_64bit(sizeof(__u64)) +
941 : /* IFLA_VF_STATS_TX_BYTES */
942 0 : nla_total_size_64bit(sizeof(__u64)) +
943 : /* IFLA_VF_STATS_BROADCAST */
944 0 : nla_total_size_64bit(sizeof(__u64)) +
945 : /* IFLA_VF_STATS_MULTICAST */
946 0 : nla_total_size_64bit(sizeof(__u64)) +
947 : /* IFLA_VF_STATS_RX_DROPPED */
948 0 : nla_total_size_64bit(sizeof(__u64)) +
949 : /* IFLA_VF_STATS_TX_DROPPED */
950 0 : nla_total_size_64bit(sizeof(__u64)) +
951 0 : nla_total_size(sizeof(struct ifla_vf_trust)));
952 0 : return size;
953 : } else
954 : return 0;
955 : }
956 :
957 4 : static size_t rtnl_port_size(const struct net_device *dev,
958 : u32 ext_filter_mask)
959 : {
960 4 : size_t port_size = nla_total_size(4) /* PORT_VF */
961 4 : + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
962 4 : + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
963 4 : + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
964 4 : + nla_total_size(1) /* PROT_VDP_REQUEST */
965 4 : + nla_total_size(2); /* PORT_VDP_RESPONSE */
966 4 : size_t vf_ports_size = nla_total_size(sizeof(struct nlattr));
967 4 : size_t vf_port_size = nla_total_size(sizeof(struct nlattr))
968 : + port_size;
969 4 : size_t port_self_size = nla_total_size(sizeof(struct nlattr))
970 : + port_size;
971 :
972 4 : if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
973 0 : !(ext_filter_mask & RTEXT_FILTER_VF))
974 : return 0;
975 0 : if (dev_num_vf(dev->dev.parent))
976 0 : return port_self_size + vf_ports_size +
977 0 : vf_port_size * dev_num_vf(dev->dev.parent);
978 : else
979 : return port_self_size;
980 : }
981 :
982 4 : static size_t rtnl_xdp_size(void)
983 : {
984 4 : size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
985 4 : nla_total_size(1) + /* XDP_ATTACHED */
986 4 : nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */
987 4 : nla_total_size(4); /* XDP_<mode>_PROG_ID */
988 :
989 4 : return xdp_size;
990 : }
991 :
992 4 : static size_t rtnl_prop_list_size(const struct net_device *dev)
993 : {
994 4 : struct netdev_name_node *name_node;
995 4 : size_t size;
996 :
997 4 : if (list_empty(&dev->name_node->list))
998 : return 0;
999 0 : size = nla_total_size(0);
1000 0 : list_for_each_entry(name_node, &dev->name_node->list, list)
1001 0 : size += nla_total_size(ALTIFNAMSIZ);
1002 : return size;
1003 : }
1004 :
1005 4 : static size_t rtnl_proto_down_size(const struct net_device *dev)
1006 : {
1007 4 : size_t size = nla_total_size(1);
1008 :
1009 4 : if (dev->proto_down_reason)
1010 0 : size += nla_total_size(0) + nla_total_size(4);
1011 :
1012 4 : return size;
1013 : }
1014 :
1015 4 : static noinline size_t if_nlmsg_size(const struct net_device *dev,
1016 : u32 ext_filter_mask)
1017 : {
1018 4 : return NLMSG_ALIGN(sizeof(struct ifinfomsg))
1019 4 : + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
1020 4 : + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */
1021 4 : + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
1022 4 : + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap))
1023 4 : + nla_total_size(sizeof(struct rtnl_link_stats))
1024 4 : + nla_total_size_64bit(sizeof(struct rtnl_link_stats64))
1025 4 : + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
1026 4 : + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
1027 4 : + nla_total_size(4) /* IFLA_TXQLEN */
1028 4 : + nla_total_size(4) /* IFLA_WEIGHT */
1029 4 : + nla_total_size(4) /* IFLA_MTU */
1030 4 : + nla_total_size(4) /* IFLA_LINK */
1031 4 : + nla_total_size(4) /* IFLA_MASTER */
1032 4 : + nla_total_size(1) /* IFLA_CARRIER */
1033 4 : + nla_total_size(4) /* IFLA_PROMISCUITY */
1034 4 : + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */
1035 4 : + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */
1036 4 : + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */
1037 4 : + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */
1038 4 : + nla_total_size(1) /* IFLA_OPERSTATE */
1039 4 : + nla_total_size(1) /* IFLA_LINKMODE */
1040 4 : + nla_total_size(4) /* IFLA_CARRIER_CHANGES */
1041 4 : + nla_total_size(4) /* IFLA_LINK_NETNSID */
1042 4 : + nla_total_size(4) /* IFLA_GROUP */
1043 4 : + nla_total_size(ext_filter_mask
1044 4 : & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
1045 4 : + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
1046 4 : + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */
1047 4 : + rtnl_link_get_size(dev) /* IFLA_LINKINFO */
1048 4 : + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */
1049 4 : + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
1050 4 : + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
1051 4 : + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
1052 4 : + rtnl_xdp_size() /* IFLA_XDP */
1053 4 : + nla_total_size(4) /* IFLA_EVENT */
1054 4 : + nla_total_size(4) /* IFLA_NEW_NETNSID */
1055 4 : + nla_total_size(4) /* IFLA_NEW_IFINDEX */
1056 4 : + rtnl_proto_down_size(dev) /* proto down */
1057 4 : + nla_total_size(4) /* IFLA_TARGET_NETNSID */
1058 4 : + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */
1059 4 : + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */
1060 4 : + nla_total_size(4) /* IFLA_MIN_MTU */
1061 4 : + nla_total_size(4) /* IFLA_MAX_MTU */
1062 4 : + rtnl_prop_list_size(dev)
1063 4 : + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */
1064 4 : + 0;
1065 : }
1066 :
1067 0 : static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev)
1068 : {
1069 0 : struct nlattr *vf_ports;
1070 0 : struct nlattr *vf_port;
1071 0 : int vf;
1072 0 : int err;
1073 :
1074 0 : vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS);
1075 0 : if (!vf_ports)
1076 : return -EMSGSIZE;
1077 :
1078 0 : for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) {
1079 0 : vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT);
1080 0 : if (!vf_port)
1081 0 : goto nla_put_failure;
1082 0 : if (nla_put_u32(skb, IFLA_PORT_VF, vf))
1083 0 : goto nla_put_failure;
1084 0 : err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb);
1085 0 : if (err == -EMSGSIZE)
1086 0 : goto nla_put_failure;
1087 0 : if (err) {
1088 0 : nla_nest_cancel(skb, vf_port);
1089 0 : continue;
1090 : }
1091 0 : nla_nest_end(skb, vf_port);
1092 : }
1093 :
1094 0 : nla_nest_end(skb, vf_ports);
1095 :
1096 0 : return 0;
1097 :
1098 0 : nla_put_failure:
1099 0 : nla_nest_cancel(skb, vf_ports);
1100 0 : return -EMSGSIZE;
1101 : }
1102 :
1103 0 : static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev)
1104 : {
1105 0 : struct nlattr *port_self;
1106 0 : int err;
1107 :
1108 0 : port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF);
1109 0 : if (!port_self)
1110 : return -EMSGSIZE;
1111 :
1112 0 : err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb);
1113 0 : if (err) {
1114 0 : nla_nest_cancel(skb, port_self);
1115 0 : return (err == -EMSGSIZE) ? err : 0;
1116 : }
1117 :
1118 0 : nla_nest_end(skb, port_self);
1119 :
1120 0 : return 0;
1121 : }
1122 :
1123 16 : static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev,
1124 : u32 ext_filter_mask)
1125 : {
1126 16 : int err;
1127 :
1128 16 : if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent ||
1129 0 : !(ext_filter_mask & RTEXT_FILTER_VF))
1130 : return 0;
1131 :
1132 0 : err = rtnl_port_self_fill(skb, dev);
1133 0 : if (err)
1134 : return err;
1135 :
1136 0 : if (dev_num_vf(dev->dev.parent)) {
1137 0 : err = rtnl_vf_ports_fill(skb, dev);
1138 0 : if (err)
1139 0 : return err;
1140 : }
1141 :
1142 : return 0;
1143 : }
1144 :
1145 16 : static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev)
1146 : {
1147 16 : int err;
1148 16 : struct netdev_phys_item_id ppid;
1149 :
1150 16 : err = dev_get_phys_port_id(dev, &ppid);
1151 16 : if (err) {
1152 16 : if (err == -EOPNOTSUPP)
1153 : return 0;
1154 0 : return err;
1155 : }
1156 :
1157 0 : if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id))
1158 0 : return -EMSGSIZE;
1159 :
1160 : return 0;
1161 : }
1162 :
1163 16 : static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
1164 : {
1165 16 : char name[IFNAMSIZ];
1166 16 : int err;
1167 :
1168 16 : err = dev_get_phys_port_name(dev, name, sizeof(name));
1169 16 : if (err) {
1170 16 : if (err == -EOPNOTSUPP)
1171 : return 0;
1172 0 : return err;
1173 : }
1174 :
1175 0 : if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
1176 0 : return -EMSGSIZE;
1177 :
1178 : return 0;
1179 : }
1180 :
1181 16 : static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev)
1182 : {
1183 16 : struct netdev_phys_item_id ppid = { };
1184 16 : int err;
1185 :
1186 16 : err = dev_get_port_parent_id(dev, &ppid, false);
1187 16 : if (err) {
1188 16 : if (err == -EOPNOTSUPP)
1189 : return 0;
1190 0 : return err;
1191 : }
1192 :
1193 0 : if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id))
1194 0 : return -EMSGSIZE;
1195 :
1196 : return 0;
1197 : }
1198 :
1199 16 : static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb,
1200 : struct net_device *dev)
1201 : {
1202 16 : struct rtnl_link_stats64 *sp;
1203 16 : struct nlattr *attr;
1204 :
1205 16 : attr = nla_reserve_64bit(skb, IFLA_STATS64,
1206 : sizeof(struct rtnl_link_stats64), IFLA_PAD);
1207 16 : if (!attr)
1208 : return -EMSGSIZE;
1209 :
1210 16 : sp = nla_data(attr);
1211 16 : dev_get_stats(dev, sp);
1212 :
1213 16 : attr = nla_reserve(skb, IFLA_STATS,
1214 : sizeof(struct rtnl_link_stats));
1215 16 : if (!attr)
1216 : return -EMSGSIZE;
1217 :
1218 16 : copy_rtnl_link_stats(nla_data(attr), sp);
1219 :
1220 16 : return 0;
1221 : }
1222 :
1223 0 : static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
1224 : struct net_device *dev,
1225 : int vfs_num,
1226 : struct nlattr *vfinfo)
1227 : {
1228 0 : struct ifla_vf_rss_query_en vf_rss_query_en;
1229 0 : struct nlattr *vf, *vfstats, *vfvlanlist;
1230 0 : struct ifla_vf_link_state vf_linkstate;
1231 0 : struct ifla_vf_vlan_info vf_vlan_info;
1232 0 : struct ifla_vf_spoofchk vf_spoofchk;
1233 0 : struct ifla_vf_tx_rate vf_tx_rate;
1234 0 : struct ifla_vf_stats vf_stats;
1235 0 : struct ifla_vf_trust vf_trust;
1236 0 : struct ifla_vf_vlan vf_vlan;
1237 0 : struct ifla_vf_rate vf_rate;
1238 0 : struct ifla_vf_mac vf_mac;
1239 0 : struct ifla_vf_broadcast vf_broadcast;
1240 0 : struct ifla_vf_info ivi;
1241 0 : struct ifla_vf_guid node_guid;
1242 0 : struct ifla_vf_guid port_guid;
1243 :
1244 0 : memset(&ivi, 0, sizeof(ivi));
1245 :
1246 : /* Not all SR-IOV capable drivers support the
1247 : * spoofcheck and "RSS query enable" query. Preset to
1248 : * -1 so the user space tool can detect that the driver
1249 : * didn't report anything.
1250 : */
1251 0 : ivi.spoofchk = -1;
1252 0 : ivi.rss_query_en = -1;
1253 0 : ivi.trusted = -1;
1254 : /* The default value for VF link state is "auto"
1255 : * IFLA_VF_LINK_STATE_AUTO which equals zero
1256 : */
1257 0 : ivi.linkstate = 0;
1258 : /* VLAN Protocol by default is 802.1Q */
1259 0 : ivi.vlan_proto = htons(ETH_P_8021Q);
1260 0 : if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi))
1261 : return 0;
1262 :
1263 0 : memset(&vf_vlan_info, 0, sizeof(vf_vlan_info));
1264 0 : memset(&node_guid, 0, sizeof(node_guid));
1265 0 : memset(&port_guid, 0, sizeof(port_guid));
1266 :
1267 0 : vf_mac.vf =
1268 0 : vf_vlan.vf =
1269 0 : vf_vlan_info.vf =
1270 0 : vf_rate.vf =
1271 0 : vf_tx_rate.vf =
1272 0 : vf_spoofchk.vf =
1273 0 : vf_linkstate.vf =
1274 0 : vf_rss_query_en.vf =
1275 0 : vf_trust.vf =
1276 0 : node_guid.vf =
1277 0 : port_guid.vf = ivi.vf;
1278 :
1279 0 : memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac));
1280 0 : memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len);
1281 0 : vf_vlan.vlan = ivi.vlan;
1282 0 : vf_vlan.qos = ivi.qos;
1283 0 : vf_vlan_info.vlan = ivi.vlan;
1284 0 : vf_vlan_info.qos = ivi.qos;
1285 0 : vf_vlan_info.vlan_proto = ivi.vlan_proto;
1286 0 : vf_tx_rate.rate = ivi.max_tx_rate;
1287 0 : vf_rate.min_tx_rate = ivi.min_tx_rate;
1288 0 : vf_rate.max_tx_rate = ivi.max_tx_rate;
1289 0 : vf_spoofchk.setting = ivi.spoofchk;
1290 0 : vf_linkstate.link_state = ivi.linkstate;
1291 0 : vf_rss_query_en.setting = ivi.rss_query_en;
1292 0 : vf_trust.setting = ivi.trusted;
1293 0 : vf = nla_nest_start_noflag(skb, IFLA_VF_INFO);
1294 0 : if (!vf)
1295 0 : goto nla_put_vfinfo_failure;
1296 0 : if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) ||
1297 0 : nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) ||
1298 0 : nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) ||
1299 0 : nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate),
1300 0 : &vf_rate) ||
1301 0 : nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate),
1302 0 : &vf_tx_rate) ||
1303 0 : nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk),
1304 0 : &vf_spoofchk) ||
1305 0 : nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate),
1306 0 : &vf_linkstate) ||
1307 0 : nla_put(skb, IFLA_VF_RSS_QUERY_EN,
1308 : sizeof(vf_rss_query_en),
1309 0 : &vf_rss_query_en) ||
1310 0 : nla_put(skb, IFLA_VF_TRUST,
1311 : sizeof(vf_trust), &vf_trust))
1312 0 : goto nla_put_vf_failure;
1313 :
1314 0 : if (dev->netdev_ops->ndo_get_vf_guid &&
1315 0 : !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid,
1316 : &port_guid)) {
1317 0 : if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid),
1318 0 : &node_guid) ||
1319 0 : nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid),
1320 : &port_guid))
1321 0 : goto nla_put_vf_failure;
1322 : }
1323 0 : vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST);
1324 0 : if (!vfvlanlist)
1325 0 : goto nla_put_vf_failure;
1326 0 : if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info),
1327 : &vf_vlan_info)) {
1328 0 : nla_nest_cancel(skb, vfvlanlist);
1329 0 : goto nla_put_vf_failure;
1330 : }
1331 0 : nla_nest_end(skb, vfvlanlist);
1332 0 : memset(&vf_stats, 0, sizeof(vf_stats));
1333 0 : if (dev->netdev_ops->ndo_get_vf_stats)
1334 0 : dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num,
1335 : &vf_stats);
1336 0 : vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS);
1337 0 : if (!vfstats)
1338 0 : goto nla_put_vf_failure;
1339 0 : if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS,
1340 0 : vf_stats.rx_packets, IFLA_VF_STATS_PAD) ||
1341 0 : nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS,
1342 0 : vf_stats.tx_packets, IFLA_VF_STATS_PAD) ||
1343 0 : nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES,
1344 0 : vf_stats.rx_bytes, IFLA_VF_STATS_PAD) ||
1345 0 : nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES,
1346 0 : vf_stats.tx_bytes, IFLA_VF_STATS_PAD) ||
1347 0 : nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST,
1348 0 : vf_stats.broadcast, IFLA_VF_STATS_PAD) ||
1349 0 : nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST,
1350 0 : vf_stats.multicast, IFLA_VF_STATS_PAD) ||
1351 0 : nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED,
1352 0 : vf_stats.rx_dropped, IFLA_VF_STATS_PAD) ||
1353 0 : nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED,
1354 : vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) {
1355 0 : nla_nest_cancel(skb, vfstats);
1356 0 : goto nla_put_vf_failure;
1357 : }
1358 0 : nla_nest_end(skb, vfstats);
1359 0 : nla_nest_end(skb, vf);
1360 0 : return 0;
1361 :
1362 0 : nla_put_vf_failure:
1363 0 : nla_nest_cancel(skb, vf);
1364 0 : nla_put_vfinfo_failure:
1365 0 : nla_nest_cancel(skb, vfinfo);
1366 0 : return -EMSGSIZE;
1367 : }
1368 :
1369 16 : static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb,
1370 : struct net_device *dev,
1371 : u32 ext_filter_mask)
1372 : {
1373 16 : struct nlattr *vfinfo;
1374 16 : int i, num_vfs;
1375 :
1376 16 : if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0))
1377 : return 0;
1378 :
1379 0 : num_vfs = dev_num_vf(dev->dev.parent);
1380 0 : if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs))
1381 : return -EMSGSIZE;
1382 :
1383 0 : if (!dev->netdev_ops->ndo_get_vf_config)
1384 : return 0;
1385 :
1386 0 : vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST);
1387 0 : if (!vfinfo)
1388 : return -EMSGSIZE;
1389 :
1390 0 : for (i = 0; i < num_vfs; i++) {
1391 0 : if (rtnl_fill_vfinfo(skb, dev, i, vfinfo))
1392 : return -EMSGSIZE;
1393 : }
1394 :
1395 0 : nla_nest_end(skb, vfinfo);
1396 0 : return 0;
1397 : }
1398 :
1399 16 : static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
1400 : {
1401 16 : struct rtnl_link_ifmap map;
1402 :
1403 16 : memset(&map, 0, sizeof(map));
1404 16 : map.mem_start = dev->mem_start;
1405 16 : map.mem_end = dev->mem_end;
1406 16 : map.base_addr = dev->base_addr;
1407 16 : map.irq = dev->irq;
1408 16 : map.dma = dev->dma;
1409 16 : map.port = dev->if_port;
1410 :
1411 16 : if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD))
1412 0 : return -EMSGSIZE;
1413 :
1414 : return 0;
1415 : }
1416 :
1417 16 : static u32 rtnl_xdp_prog_skb(struct net_device *dev)
1418 : {
1419 16 : const struct bpf_prog *generic_xdp_prog;
1420 :
1421 16 : ASSERT_RTNL();
1422 :
1423 32 : generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
1424 16 : if (!generic_xdp_prog)
1425 : return 0;
1426 0 : return generic_xdp_prog->aux->id;
1427 : }
1428 :
1429 16 : static u32 rtnl_xdp_prog_drv(struct net_device *dev)
1430 : {
1431 16 : return dev_xdp_prog_id(dev, XDP_MODE_DRV);
1432 : }
1433 :
1434 16 : static u32 rtnl_xdp_prog_hw(struct net_device *dev)
1435 : {
1436 16 : return dev_xdp_prog_id(dev, XDP_MODE_HW);
1437 : }
1438 :
1439 48 : static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev,
1440 : u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr,
1441 : u32 (*get_prog_id)(struct net_device *dev))
1442 : {
1443 48 : u32 curr_id;
1444 48 : int err;
1445 :
1446 48 : curr_id = get_prog_id(dev);
1447 48 : if (!curr_id)
1448 : return 0;
1449 :
1450 0 : *prog_id = curr_id;
1451 0 : err = nla_put_u32(skb, attr, curr_id);
1452 0 : if (err)
1453 : return err;
1454 :
1455 0 : if (*mode != XDP_ATTACHED_NONE)
1456 0 : *mode = XDP_ATTACHED_MULTI;
1457 : else
1458 0 : *mode = tgt_mode;
1459 :
1460 : return 0;
1461 : }
1462 :
1463 16 : static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
1464 : {
1465 16 : struct nlattr *xdp;
1466 16 : u32 prog_id;
1467 16 : int err;
1468 16 : u8 mode;
1469 :
1470 16 : xdp = nla_nest_start_noflag(skb, IFLA_XDP);
1471 16 : if (!xdp)
1472 : return -EMSGSIZE;
1473 :
1474 16 : prog_id = 0;
1475 16 : mode = XDP_ATTACHED_NONE;
1476 16 : err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB,
1477 : IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb);
1478 16 : if (err)
1479 0 : goto err_cancel;
1480 16 : err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV,
1481 : IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv);
1482 16 : if (err)
1483 0 : goto err_cancel;
1484 16 : err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW,
1485 : IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw);
1486 16 : if (err)
1487 0 : goto err_cancel;
1488 :
1489 16 : err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
1490 16 : if (err)
1491 0 : goto err_cancel;
1492 :
1493 16 : if (prog_id && mode != XDP_ATTACHED_MULTI) {
1494 0 : err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
1495 0 : if (err)
1496 0 : goto err_cancel;
1497 : }
1498 :
1499 16 : nla_nest_end(skb, xdp);
1500 16 : return 0;
1501 :
1502 0 : err_cancel:
1503 0 : nla_nest_cancel(skb, xdp);
1504 0 : return err;
1505 : }
1506 :
1507 4 : static u32 rtnl_get_event(unsigned long event)
1508 : {
1509 4 : u32 rtnl_event_type = IFLA_EVENT_NONE;
1510 :
1511 4 : switch (event) {
1512 : case NETDEV_REBOOT:
1513 : rtnl_event_type = IFLA_EVENT_REBOOT;
1514 : break;
1515 : case NETDEV_FEAT_CHANGE:
1516 : rtnl_event_type = IFLA_EVENT_FEATURES;
1517 : break;
1518 : case NETDEV_BONDING_FAILOVER:
1519 : rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
1520 : break;
1521 : case NETDEV_NOTIFY_PEERS:
1522 : rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
1523 : break;
1524 : case NETDEV_RESEND_IGMP:
1525 : rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
1526 : break;
1527 : case NETDEV_CHANGEINFODATA:
1528 : rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
1529 : break;
1530 : default:
1531 : break;
1532 : }
1533 :
1534 4 : return rtnl_event_type;
1535 : }
1536 :
1537 16 : static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev)
1538 : {
1539 16 : const struct net_device *upper_dev;
1540 16 : int ret = 0;
1541 :
1542 16 : rcu_read_lock();
1543 :
1544 16 : upper_dev = netdev_master_upper_dev_get_rcu(dev);
1545 16 : if (upper_dev)
1546 0 : ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex);
1547 :
1548 16 : rcu_read_unlock();
1549 16 : return ret;
1550 : }
1551 :
1552 16 : static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev,
1553 : bool force)
1554 : {
1555 16 : int ifindex = dev_get_iflink(dev);
1556 :
1557 16 : if (force || dev->ifindex != ifindex)
1558 0 : return nla_put_u32(skb, IFLA_LINK, ifindex);
1559 :
1560 : return 0;
1561 : }
1562 :
1563 16 : static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb,
1564 : struct net_device *dev)
1565 : {
1566 16 : char buf[IFALIASZ];
1567 16 : int ret;
1568 :
1569 16 : ret = dev_get_alias(dev, buf, sizeof(buf));
1570 16 : return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0;
1571 : }
1572 :
1573 16 : static int rtnl_fill_link_netnsid(struct sk_buff *skb,
1574 : const struct net_device *dev,
1575 : struct net *src_net, gfp_t gfp)
1576 : {
1577 16 : bool put_iflink = false;
1578 :
1579 16 : if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) {
1580 0 : struct net *link_net = dev->rtnl_link_ops->get_link_net(dev);
1581 :
1582 0 : if (!net_eq(dev_net(dev), link_net)) {
1583 : int id = peernet2id_alloc(src_net, link_net, gfp);
1584 :
1585 : if (nla_put_s32(skb, IFLA_LINK_NETNSID, id))
1586 : return -EMSGSIZE;
1587 :
1588 : put_iflink = true;
1589 : }
1590 : }
1591 :
1592 16 : return nla_put_iflink(skb, dev, put_iflink);
1593 : }
1594 :
1595 16 : static int rtnl_fill_link_af(struct sk_buff *skb,
1596 : const struct net_device *dev,
1597 : u32 ext_filter_mask)
1598 : {
1599 16 : const struct rtnl_af_ops *af_ops;
1600 16 : struct nlattr *af_spec;
1601 :
1602 16 : af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
1603 16 : if (!af_spec)
1604 : return -EMSGSIZE;
1605 :
1606 31 : list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
1607 15 : struct nlattr *af;
1608 15 : int err;
1609 :
1610 15 : if (!af_ops->fill_link_af)
1611 0 : continue;
1612 :
1613 15 : af = nla_nest_start_noflag(skb, af_ops->family);
1614 15 : if (!af)
1615 : return -EMSGSIZE;
1616 :
1617 15 : err = af_ops->fill_link_af(skb, dev, ext_filter_mask);
1618 : /*
1619 : * Caller may return ENODATA to indicate that there
1620 : * was no data to be dumped. This is not an error, it
1621 : * means we should trim the attribute header and
1622 : * continue.
1623 : */
1624 15 : if (err == -ENODATA)
1625 0 : nla_nest_cancel(skb, af);
1626 15 : else if (err < 0)
1627 : return -EMSGSIZE;
1628 :
1629 15 : nla_nest_end(skb, af);
1630 : }
1631 :
1632 16 : nla_nest_end(skb, af_spec);
1633 16 : return 0;
1634 : }
1635 :
1636 16 : static int rtnl_fill_alt_ifnames(struct sk_buff *skb,
1637 : const struct net_device *dev)
1638 : {
1639 16 : struct netdev_name_node *name_node;
1640 16 : int count = 0;
1641 :
1642 16 : list_for_each_entry(name_node, &dev->name_node->list, list) {
1643 0 : if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name))
1644 : return -EMSGSIZE;
1645 0 : count++;
1646 : }
1647 : return count;
1648 : }
1649 :
1650 16 : static int rtnl_fill_prop_list(struct sk_buff *skb,
1651 : const struct net_device *dev)
1652 : {
1653 16 : struct nlattr *prop_list;
1654 16 : int ret;
1655 :
1656 16 : prop_list = nla_nest_start(skb, IFLA_PROP_LIST);
1657 16 : if (!prop_list)
1658 : return -EMSGSIZE;
1659 :
1660 16 : ret = rtnl_fill_alt_ifnames(skb, dev);
1661 16 : if (ret <= 0)
1662 16 : goto nest_cancel;
1663 :
1664 0 : nla_nest_end(skb, prop_list);
1665 0 : return 0;
1666 :
1667 16 : nest_cancel:
1668 16 : nla_nest_cancel(skb, prop_list);
1669 16 : return ret;
1670 : }
1671 :
1672 16 : static int rtnl_fill_proto_down(struct sk_buff *skb,
1673 : const struct net_device *dev)
1674 : {
1675 16 : struct nlattr *pr;
1676 16 : u32 preason;
1677 :
1678 16 : if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
1679 0 : goto nla_put_failure;
1680 :
1681 16 : preason = dev->proto_down_reason;
1682 16 : if (!preason)
1683 : return 0;
1684 :
1685 0 : pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON);
1686 0 : if (!pr)
1687 : return -EMSGSIZE;
1688 :
1689 0 : if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) {
1690 0 : nla_nest_cancel(skb, pr);
1691 0 : goto nla_put_failure;
1692 : }
1693 :
1694 0 : nla_nest_end(skb, pr);
1695 0 : return 0;
1696 :
1697 : nla_put_failure:
1698 : return -EMSGSIZE;
1699 : }
1700 :
1701 16 : static int rtnl_fill_ifinfo(struct sk_buff *skb,
1702 : struct net_device *dev, struct net *src_net,
1703 : int type, u32 pid, u32 seq, u32 change,
1704 : unsigned int flags, u32 ext_filter_mask,
1705 : u32 event, int *new_nsid, int new_ifindex,
1706 : int tgt_netnsid, gfp_t gfp)
1707 : {
1708 16 : struct ifinfomsg *ifm;
1709 16 : struct nlmsghdr *nlh;
1710 :
1711 16 : ASSERT_RTNL();
1712 16 : nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
1713 16 : if (nlh == NULL)
1714 : return -EMSGSIZE;
1715 :
1716 16 : ifm = nlmsg_data(nlh);
1717 16 : ifm->ifi_family = AF_UNSPEC;
1718 16 : ifm->__ifi_pad = 0;
1719 16 : ifm->ifi_type = dev->type;
1720 16 : ifm->ifi_index = dev->ifindex;
1721 16 : ifm->ifi_flags = dev_get_flags(dev);
1722 16 : ifm->ifi_change = change;
1723 :
1724 16 : if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid))
1725 0 : goto nla_put_failure;
1726 :
1727 16 : if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
1728 16 : nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) ||
1729 16 : nla_put_u8(skb, IFLA_OPERSTATE,
1730 16 : netif_running(dev) ? dev->operstate : IF_OPER_DOWN) ||
1731 16 : nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) ||
1732 16 : nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
1733 16 : nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) ||
1734 16 : nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) ||
1735 16 : nla_put_u32(skb, IFLA_GROUP, dev->group) ||
1736 16 : nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) ||
1737 16 : nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) ||
1738 16 : nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) ||
1739 16 : nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) ||
1740 : #ifdef CONFIG_RPS
1741 32 : nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) ||
1742 : #endif
1743 16 : put_master_ifindex(skb, dev) ||
1744 16 : nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) ||
1745 32 : (dev->qdisc &&
1746 32 : nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) ||
1747 16 : nla_put_ifalias(skb, dev) ||
1748 16 : nla_put_u32(skb, IFLA_CARRIER_CHANGES,
1749 16 : atomic_read(&dev->carrier_up_count) +
1750 16 : atomic_read(&dev->carrier_down_count)) ||
1751 16 : nla_put_u32(skb, IFLA_CARRIER_UP_COUNT,
1752 16 : atomic_read(&dev->carrier_up_count)) ||
1753 16 : nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT,
1754 16 : atomic_read(&dev->carrier_down_count)))
1755 0 : goto nla_put_failure;
1756 :
1757 16 : if (rtnl_fill_proto_down(skb, dev))
1758 0 : goto nla_put_failure;
1759 :
1760 16 : if (event != IFLA_EVENT_NONE) {
1761 0 : if (nla_put_u32(skb, IFLA_EVENT, event))
1762 0 : goto nla_put_failure;
1763 : }
1764 :
1765 16 : if (rtnl_fill_link_ifmap(skb, dev))
1766 0 : goto nla_put_failure;
1767 :
1768 16 : if (dev->addr_len) {
1769 32 : if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) ||
1770 16 : nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast))
1771 0 : goto nla_put_failure;
1772 : }
1773 :
1774 16 : if (rtnl_phys_port_id_fill(skb, dev))
1775 0 : goto nla_put_failure;
1776 :
1777 16 : if (rtnl_phys_port_name_fill(skb, dev))
1778 0 : goto nla_put_failure;
1779 :
1780 16 : if (rtnl_phys_switch_id_fill(skb, dev))
1781 0 : goto nla_put_failure;
1782 :
1783 16 : if (rtnl_fill_stats(skb, dev))
1784 0 : goto nla_put_failure;
1785 :
1786 16 : if (rtnl_fill_vf(skb, dev, ext_filter_mask))
1787 0 : goto nla_put_failure;
1788 :
1789 16 : if (rtnl_port_fill(skb, dev, ext_filter_mask))
1790 0 : goto nla_put_failure;
1791 :
1792 16 : if (rtnl_xdp_fill(skb, dev))
1793 0 : goto nla_put_failure;
1794 :
1795 16 : if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) {
1796 0 : if (rtnl_link_fill(skb, dev) < 0)
1797 0 : goto nla_put_failure;
1798 : }
1799 :
1800 16 : if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp))
1801 0 : goto nla_put_failure;
1802 :
1803 16 : if (new_nsid &&
1804 0 : nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0)
1805 0 : goto nla_put_failure;
1806 16 : if (new_ifindex &&
1807 0 : nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0)
1808 0 : goto nla_put_failure;
1809 :
1810 24 : if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) &&
1811 8 : nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr))
1812 0 : goto nla_put_failure;
1813 :
1814 16 : rcu_read_lock();
1815 16 : if (rtnl_fill_link_af(skb, dev, ext_filter_mask))
1816 0 : goto nla_put_failure_rcu;
1817 16 : rcu_read_unlock();
1818 :
1819 16 : if (rtnl_fill_prop_list(skb, dev))
1820 0 : goto nla_put_failure;
1821 :
1822 16 : nlmsg_end(skb, nlh);
1823 16 : return 0;
1824 :
1825 0 : nla_put_failure_rcu:
1826 0 : rcu_read_unlock();
1827 0 : nla_put_failure:
1828 0 : nlmsg_cancel(skb, nlh);
1829 0 : return -EMSGSIZE;
1830 : }
1831 :
1832 : static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
1833 : [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
1834 : [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1835 : [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1836 : [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
1837 : [IFLA_MTU] = { .type = NLA_U32 },
1838 : [IFLA_LINK] = { .type = NLA_U32 },
1839 : [IFLA_MASTER] = { .type = NLA_U32 },
1840 : [IFLA_CARRIER] = { .type = NLA_U8 },
1841 : [IFLA_TXQLEN] = { .type = NLA_U32 },
1842 : [IFLA_WEIGHT] = { .type = NLA_U32 },
1843 : [IFLA_OPERSTATE] = { .type = NLA_U8 },
1844 : [IFLA_LINKMODE] = { .type = NLA_U8 },
1845 : [IFLA_LINKINFO] = { .type = NLA_NESTED },
1846 : [IFLA_NET_NS_PID] = { .type = NLA_U32 },
1847 : [IFLA_NET_NS_FD] = { .type = NLA_U32 },
1848 : /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to
1849 : * allow 0-length string (needed to remove an alias).
1850 : */
1851 : [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 },
1852 : [IFLA_VFINFO_LIST] = {. type = NLA_NESTED },
1853 : [IFLA_VF_PORTS] = { .type = NLA_NESTED },
1854 : [IFLA_PORT_SELF] = { .type = NLA_NESTED },
1855 : [IFLA_AF_SPEC] = { .type = NLA_NESTED },
1856 : [IFLA_EXT_MASK] = { .type = NLA_U32 },
1857 : [IFLA_PROMISCUITY] = { .type = NLA_U32 },
1858 : [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
1859 : [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
1860 : [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 },
1861 : [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 },
1862 : [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1863 : [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */
1864 : [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN },
1865 : [IFLA_LINK_NETNSID] = { .type = NLA_S32 },
1866 : [IFLA_PROTO_DOWN] = { .type = NLA_U8 },
1867 : [IFLA_XDP] = { .type = NLA_NESTED },
1868 : [IFLA_EVENT] = { .type = NLA_U32 },
1869 : [IFLA_GROUP] = { .type = NLA_U32 },
1870 : [IFLA_TARGET_NETNSID] = { .type = NLA_S32 },
1871 : [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 },
1872 : [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 },
1873 : [IFLA_MIN_MTU] = { .type = NLA_U32 },
1874 : [IFLA_MAX_MTU] = { .type = NLA_U32 },
1875 : [IFLA_PROP_LIST] = { .type = NLA_NESTED },
1876 : [IFLA_ALT_IFNAME] = { .type = NLA_STRING,
1877 : .len = ALTIFNAMSIZ - 1 },
1878 : [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT },
1879 : [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED },
1880 : };
1881 :
1882 : static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
1883 : [IFLA_INFO_KIND] = { .type = NLA_STRING },
1884 : [IFLA_INFO_DATA] = { .type = NLA_NESTED },
1885 : [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING },
1886 : [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED },
1887 : };
1888 :
1889 : static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
1890 : [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
1891 : [IFLA_VF_BROADCAST] = { .type = NLA_REJECT },
1892 : [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
1893 : [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED },
1894 : [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
1895 : [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
1896 : [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) },
1897 : [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) },
1898 : [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) },
1899 : [IFLA_VF_STATS] = { .type = NLA_NESTED },
1900 : [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) },
1901 : [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1902 : [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) },
1903 : };
1904 :
1905 : static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
1906 : [IFLA_PORT_VF] = { .type = NLA_U32 },
1907 : [IFLA_PORT_PROFILE] = { .type = NLA_STRING,
1908 : .len = PORT_PROFILE_MAX },
1909 : [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
1910 : .len = PORT_UUID_MAX },
1911 : [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
1912 : .len = PORT_UUID_MAX },
1913 : [IFLA_PORT_REQUEST] = { .type = NLA_U8, },
1914 : [IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
1915 :
1916 : /* Unused, but we need to keep it here since user space could
1917 : * fill it. It's also broken with regard to NLA_BINARY use in
1918 : * combination with structs.
1919 : */
1920 : [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
1921 : .len = sizeof(struct ifla_port_vsi) },
1922 : };
1923 :
1924 : static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
1925 : [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD },
1926 : [IFLA_XDP_FD] = { .type = NLA_S32 },
1927 : [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 },
1928 : [IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
1929 : [IFLA_XDP_FLAGS] = { .type = NLA_U32 },
1930 : [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
1931 : };
1932 :
1933 0 : static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
1934 : {
1935 0 : const struct rtnl_link_ops *ops = NULL;
1936 0 : struct nlattr *linfo[IFLA_INFO_MAX + 1];
1937 :
1938 0 : if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0)
1939 : return NULL;
1940 :
1941 0 : if (linfo[IFLA_INFO_KIND]) {
1942 0 : char kind[MODULE_NAME_LEN];
1943 :
1944 0 : nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind));
1945 0 : ops = rtnl_link_ops_get(kind);
1946 : }
1947 :
1948 : return ops;
1949 : }
1950 :
1951 12 : static bool link_master_filtered(struct net_device *dev, int master_idx)
1952 : {
1953 12 : struct net_device *master;
1954 :
1955 12 : if (!master_idx)
1956 : return false;
1957 :
1958 0 : master = netdev_master_upper_dev_get(dev);
1959 0 : if (!master || master->ifindex != master_idx)
1960 0 : return true;
1961 :
1962 : return false;
1963 : }
1964 :
1965 12 : static bool link_kind_filtered(const struct net_device *dev,
1966 : const struct rtnl_link_ops *kind_ops)
1967 : {
1968 12 : if (kind_ops && dev->rtnl_link_ops != kind_ops)
1969 : return true;
1970 :
1971 : return false;
1972 : }
1973 :
1974 12 : static bool link_dump_filtered(struct net_device *dev,
1975 : int master_idx,
1976 : const struct rtnl_link_ops *kind_ops)
1977 : {
1978 12 : if (link_master_filtered(dev, master_idx) ||
1979 12 : link_kind_filtered(dev, kind_ops))
1980 0 : return true;
1981 :
1982 : return false;
1983 : }
1984 :
1985 : /**
1986 : * rtnl_get_net_ns_capable - Get netns if sufficiently privileged.
1987 : * @sk: netlink socket
1988 : * @netnsid: network namespace identifier
1989 : *
1990 : * Returns the network namespace identified by netnsid on success or an error
1991 : * pointer on failure.
1992 : */
1993 0 : struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid)
1994 : {
1995 0 : struct net *net;
1996 :
1997 0 : net = get_net_ns_by_id(sock_net(sk), netnsid);
1998 0 : if (!net)
1999 0 : return ERR_PTR(-EINVAL);
2000 :
2001 : /* For now, the caller is required to have CAP_NET_ADMIN in
2002 : * the user namespace owning the target net ns.
2003 : */
2004 0 : if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) {
2005 0 : put_net(net);
2006 0 : return ERR_PTR(-EACCES);
2007 : }
2008 : return net;
2009 : }
2010 : EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable);
2011 :
2012 12 : static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh,
2013 : bool strict_check, struct nlattr **tb,
2014 : struct netlink_ext_ack *extack)
2015 : {
2016 12 : int hdrlen;
2017 :
2018 12 : if (strict_check) {
2019 0 : struct ifinfomsg *ifm;
2020 :
2021 0 : if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
2022 0 : NL_SET_ERR_MSG(extack, "Invalid header for link dump");
2023 0 : return -EINVAL;
2024 : }
2025 :
2026 0 : ifm = nlmsg_data(nlh);
2027 0 : if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
2028 0 : ifm->ifi_change) {
2029 0 : NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request");
2030 0 : return -EINVAL;
2031 : }
2032 0 : if (ifm->ifi_index) {
2033 0 : NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps");
2034 0 : return -EINVAL;
2035 : }
2036 :
2037 0 : return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb,
2038 : IFLA_MAX, ifla_policy,
2039 : extack);
2040 : }
2041 :
2042 : /* A hack to preserve kernel<->userspace interface.
2043 : * The correct header is ifinfomsg. It is consistent with rtnl_getlink.
2044 : * However, before Linux v3.9 the code here assumed rtgenmsg and that's
2045 : * what iproute2 < v3.9.0 used.
2046 : * We can detect the old iproute2. Even including the IFLA_EXT_MASK
2047 : * attribute, its netlink message is shorter than struct ifinfomsg.
2048 : */
2049 12 : hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
2050 : sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
2051 :
2052 12 : return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy,
2053 : extack);
2054 : }
2055 :
2056 12 : static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
2057 : {
2058 12 : struct netlink_ext_ack *extack = cb->extack;
2059 12 : const struct nlmsghdr *nlh = cb->nlh;
2060 12 : struct net *net = sock_net(skb->sk);
2061 12 : struct net *tgt_net = net;
2062 12 : int h, s_h;
2063 12 : int idx = 0, s_idx;
2064 12 : struct net_device *dev;
2065 12 : struct hlist_head *head;
2066 12 : struct nlattr *tb[IFLA_MAX+1];
2067 12 : u32 ext_filter_mask = 0;
2068 12 : const struct rtnl_link_ops *kind_ops = NULL;
2069 12 : unsigned int flags = NLM_F_MULTI;
2070 12 : int master_idx = 0;
2071 12 : int netnsid = -1;
2072 12 : int err, i;
2073 :
2074 12 : s_h = cb->args[0];
2075 12 : s_idx = cb->args[1];
2076 :
2077 12 : err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack);
2078 12 : if (err < 0) {
2079 0 : if (cb->strict_check)
2080 : return err;
2081 :
2082 0 : goto walk_entries;
2083 : }
2084 :
2085 684 : for (i = 0; i <= IFLA_MAX; ++i) {
2086 672 : if (!tb[i])
2087 672 : continue;
2088 :
2089 : /* new attributes should only be added with strict checking */
2090 0 : switch (i) {
2091 0 : case IFLA_TARGET_NETNSID:
2092 0 : netnsid = nla_get_s32(tb[i]);
2093 0 : tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
2094 0 : if (IS_ERR(tgt_net)) {
2095 0 : NL_SET_ERR_MSG(extack, "Invalid target network namespace id");
2096 0 : return PTR_ERR(tgt_net);
2097 : }
2098 : break;
2099 0 : case IFLA_EXT_MASK:
2100 0 : ext_filter_mask = nla_get_u32(tb[i]);
2101 0 : break;
2102 0 : case IFLA_MASTER:
2103 0 : master_idx = nla_get_u32(tb[i]);
2104 0 : break;
2105 0 : case IFLA_LINKINFO:
2106 0 : kind_ops = linkinfo_to_kind_ops(tb[i]);
2107 0 : break;
2108 0 : default:
2109 0 : if (cb->strict_check) {
2110 0 : NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request");
2111 0 : return -EINVAL;
2112 : }
2113 : }
2114 : }
2115 :
2116 12 : if (master_idx || kind_ops)
2117 0 : flags |= NLM_F_DUMP_FILTERED;
2118 :
2119 12 : walk_entries:
2120 1548 : for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
2121 1536 : idx = 0;
2122 1536 : head = &tgt_net->dev_index_head[h];
2123 3084 : hlist_for_each_entry(dev, head, index_hlist) {
2124 12 : if (link_dump_filtered(dev, master_idx, kind_ops))
2125 0 : goto cont;
2126 12 : if (idx < s_idx)
2127 0 : goto cont;
2128 24 : err = rtnl_fill_ifinfo(skb, dev, net,
2129 : RTM_NEWLINK,
2130 12 : NETLINK_CB(cb->skb).portid,
2131 : nlh->nlmsg_seq, 0, flags,
2132 : ext_filter_mask, 0, NULL, 0,
2133 : netnsid, GFP_KERNEL);
2134 :
2135 12 : if (err < 0) {
2136 0 : if (likely(skb->len))
2137 0 : goto out;
2138 :
2139 0 : goto out_err;
2140 : }
2141 12 : cont:
2142 12 : idx++;
2143 : }
2144 : }
2145 12 : out:
2146 12 : err = skb->len;
2147 12 : out_err:
2148 12 : cb->args[1] = idx;
2149 12 : cb->args[0] = h;
2150 12 : cb->seq = tgt_net->dev_base_seq;
2151 12 : nl_dump_check_consistent(cb, nlmsg_hdr(skb));
2152 12 : if (netnsid >= 0)
2153 12 : put_net(tgt_net);
2154 :
2155 12 : return err;
2156 : }
2157 :
2158 0 : int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
2159 : struct netlink_ext_ack *exterr)
2160 : {
2161 0 : return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy,
2162 : exterr);
2163 : }
2164 : EXPORT_SYMBOL(rtnl_nla_parse_ifla);
2165 :
2166 0 : struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[])
2167 : {
2168 0 : struct net *net;
2169 : /* Examine the link attributes and figure out which
2170 : * network namespace we are talking about.
2171 : */
2172 0 : if (tb[IFLA_NET_NS_PID])
2173 0 : net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID]));
2174 0 : else if (tb[IFLA_NET_NS_FD])
2175 0 : net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD]));
2176 : else
2177 0 : net = get_net(src_net);
2178 0 : return net;
2179 : }
2180 : EXPORT_SYMBOL(rtnl_link_get_net);
2181 :
2182 : /* Figure out which network namespace we are talking about by
2183 : * examining the link attributes in the following order:
2184 : *
2185 : * 1. IFLA_NET_NS_PID
2186 : * 2. IFLA_NET_NS_FD
2187 : * 3. IFLA_TARGET_NETNSID
2188 : */
2189 0 : static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net,
2190 : struct nlattr *tb[])
2191 : {
2192 0 : struct net *net;
2193 :
2194 0 : if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])
2195 0 : return rtnl_link_get_net(src_net, tb);
2196 :
2197 0 : if (!tb[IFLA_TARGET_NETNSID])
2198 0 : return get_net(src_net);
2199 :
2200 0 : net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID]));
2201 0 : if (!net)
2202 0 : return ERR_PTR(-EINVAL);
2203 :
2204 : return net;
2205 : }
2206 :
2207 0 : static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb,
2208 : struct net *src_net,
2209 : struct nlattr *tb[], int cap)
2210 : {
2211 0 : struct net *net;
2212 :
2213 0 : net = rtnl_link_get_net_by_nlattr(src_net, tb);
2214 0 : if (IS_ERR(net))
2215 : return net;
2216 :
2217 0 : if (!netlink_ns_capable(skb, net->user_ns, cap)) {
2218 0 : put_net(net);
2219 0 : return ERR_PTR(-EPERM);
2220 : }
2221 :
2222 : return net;
2223 : }
2224 :
2225 : /* Verify that rtnetlink requests do not pass additional properties
2226 : * potentially referring to different network namespaces.
2227 : */
2228 5 : static int rtnl_ensure_unique_netns(struct nlattr *tb[],
2229 : struct netlink_ext_ack *extack,
2230 : bool netns_id_only)
2231 : {
2232 :
2233 5 : if (netns_id_only) {
2234 0 : if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD])
2235 : return 0;
2236 :
2237 0 : NL_SET_ERR_MSG(extack, "specified netns attribute not supported");
2238 0 : return -EOPNOTSUPP;
2239 : }
2240 :
2241 5 : if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]))
2242 0 : goto invalid_attr;
2243 :
2244 5 : if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD]))
2245 0 : goto invalid_attr;
2246 :
2247 5 : if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID]))
2248 0 : goto invalid_attr;
2249 :
2250 : return 0;
2251 :
2252 0 : invalid_attr:
2253 0 : NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified");
2254 : return -EINVAL;
2255 : }
2256 :
2257 7 : static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[])
2258 : {
2259 7 : if (dev) {
2260 5 : if (tb[IFLA_ADDRESS] &&
2261 0 : nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
2262 : return -EINVAL;
2263 :
2264 5 : if (tb[IFLA_BROADCAST] &&
2265 0 : nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
2266 : return -EINVAL;
2267 : }
2268 :
2269 7 : if (tb[IFLA_AF_SPEC]) {
2270 0 : struct nlattr *af;
2271 0 : int rem, err;
2272 :
2273 0 : nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2274 0 : const struct rtnl_af_ops *af_ops;
2275 :
2276 0 : rcu_read_lock();
2277 0 : af_ops = rtnl_af_lookup(nla_type(af));
2278 0 : if (!af_ops) {
2279 0 : rcu_read_unlock();
2280 0 : return -EAFNOSUPPORT;
2281 : }
2282 :
2283 0 : if (!af_ops->set_link_af) {
2284 0 : rcu_read_unlock();
2285 0 : return -EOPNOTSUPP;
2286 : }
2287 :
2288 0 : if (af_ops->validate_link_af) {
2289 0 : err = af_ops->validate_link_af(dev, af);
2290 0 : if (err < 0) {
2291 0 : rcu_read_unlock();
2292 0 : return err;
2293 : }
2294 : }
2295 :
2296 0 : rcu_read_unlock();
2297 : }
2298 : }
2299 :
2300 : return 0;
2301 : }
2302 :
2303 0 : static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt,
2304 : int guid_type)
2305 : {
2306 0 : const struct net_device_ops *ops = dev->netdev_ops;
2307 :
2308 0 : return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type);
2309 : }
2310 :
2311 0 : static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type)
2312 : {
2313 0 : if (dev->type != ARPHRD_INFINIBAND)
2314 : return -EOPNOTSUPP;
2315 :
2316 0 : return handle_infiniband_guid(dev, ivt, guid_type);
2317 : }
2318 :
2319 0 : static int do_setvfinfo(struct net_device *dev, struct nlattr **tb)
2320 : {
2321 0 : const struct net_device_ops *ops = dev->netdev_ops;
2322 0 : int err = -EINVAL;
2323 :
2324 0 : if (tb[IFLA_VF_MAC]) {
2325 0 : struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]);
2326 :
2327 0 : if (ivm->vf >= INT_MAX)
2328 : return -EINVAL;
2329 0 : err = -EOPNOTSUPP;
2330 0 : if (ops->ndo_set_vf_mac)
2331 0 : err = ops->ndo_set_vf_mac(dev, ivm->vf,
2332 0 : ivm->mac);
2333 0 : if (err < 0)
2334 0 : return err;
2335 : }
2336 :
2337 0 : if (tb[IFLA_VF_VLAN]) {
2338 0 : struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]);
2339 :
2340 0 : if (ivv->vf >= INT_MAX)
2341 : return -EINVAL;
2342 0 : err = -EOPNOTSUPP;
2343 0 : if (ops->ndo_set_vf_vlan)
2344 0 : err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan,
2345 0 : ivv->qos,
2346 : htons(ETH_P_8021Q));
2347 0 : if (err < 0)
2348 0 : return err;
2349 : }
2350 :
2351 0 : if (tb[IFLA_VF_VLAN_LIST]) {
2352 0 : struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN];
2353 0 : struct nlattr *attr;
2354 0 : int rem, len = 0;
2355 :
2356 0 : err = -EOPNOTSUPP;
2357 0 : if (!ops->ndo_set_vf_vlan)
2358 0 : return err;
2359 :
2360 0 : nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) {
2361 0 : if (nla_type(attr) != IFLA_VF_VLAN_INFO ||
2362 0 : nla_len(attr) < NLA_HDRLEN) {
2363 : return -EINVAL;
2364 : }
2365 0 : if (len >= MAX_VLAN_LIST_LEN)
2366 : return -EOPNOTSUPP;
2367 0 : ivvl[len] = nla_data(attr);
2368 :
2369 0 : len++;
2370 : }
2371 0 : if (len == 0)
2372 : return -EINVAL;
2373 :
2374 0 : if (ivvl[0]->vf >= INT_MAX)
2375 : return -EINVAL;
2376 0 : err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan,
2377 0 : ivvl[0]->qos, ivvl[0]->vlan_proto);
2378 0 : if (err < 0)
2379 : return err;
2380 : }
2381 :
2382 0 : if (tb[IFLA_VF_TX_RATE]) {
2383 0 : struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]);
2384 0 : struct ifla_vf_info ivf;
2385 :
2386 0 : if (ivt->vf >= INT_MAX)
2387 0 : return -EINVAL;
2388 0 : err = -EOPNOTSUPP;
2389 0 : if (ops->ndo_get_vf_config)
2390 0 : err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf);
2391 0 : if (err < 0)
2392 0 : return err;
2393 :
2394 0 : err = -EOPNOTSUPP;
2395 0 : if (ops->ndo_set_vf_rate)
2396 0 : err = ops->ndo_set_vf_rate(dev, ivt->vf,
2397 0 : ivf.min_tx_rate,
2398 0 : ivt->rate);
2399 0 : if (err < 0)
2400 0 : return err;
2401 : }
2402 :
2403 0 : if (tb[IFLA_VF_RATE]) {
2404 0 : struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]);
2405 :
2406 0 : if (ivt->vf >= INT_MAX)
2407 : return -EINVAL;
2408 0 : err = -EOPNOTSUPP;
2409 0 : if (ops->ndo_set_vf_rate)
2410 0 : err = ops->ndo_set_vf_rate(dev, ivt->vf,
2411 0 : ivt->min_tx_rate,
2412 0 : ivt->max_tx_rate);
2413 0 : if (err < 0)
2414 0 : return err;
2415 : }
2416 :
2417 0 : if (tb[IFLA_VF_SPOOFCHK]) {
2418 0 : struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]);
2419 :
2420 0 : if (ivs->vf >= INT_MAX)
2421 : return -EINVAL;
2422 0 : err = -EOPNOTSUPP;
2423 0 : if (ops->ndo_set_vf_spoofchk)
2424 0 : err = ops->ndo_set_vf_spoofchk(dev, ivs->vf,
2425 0 : ivs->setting);
2426 0 : if (err < 0)
2427 0 : return err;
2428 : }
2429 :
2430 0 : if (tb[IFLA_VF_LINK_STATE]) {
2431 0 : struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]);
2432 :
2433 0 : if (ivl->vf >= INT_MAX)
2434 : return -EINVAL;
2435 0 : err = -EOPNOTSUPP;
2436 0 : if (ops->ndo_set_vf_link_state)
2437 0 : err = ops->ndo_set_vf_link_state(dev, ivl->vf,
2438 0 : ivl->link_state);
2439 0 : if (err < 0)
2440 0 : return err;
2441 : }
2442 :
2443 0 : if (tb[IFLA_VF_RSS_QUERY_EN]) {
2444 0 : struct ifla_vf_rss_query_en *ivrssq_en;
2445 :
2446 0 : err = -EOPNOTSUPP;
2447 0 : ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]);
2448 0 : if (ivrssq_en->vf >= INT_MAX)
2449 : return -EINVAL;
2450 0 : if (ops->ndo_set_vf_rss_query_en)
2451 0 : err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf,
2452 0 : ivrssq_en->setting);
2453 0 : if (err < 0)
2454 0 : return err;
2455 : }
2456 :
2457 0 : if (tb[IFLA_VF_TRUST]) {
2458 0 : struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]);
2459 :
2460 0 : if (ivt->vf >= INT_MAX)
2461 : return -EINVAL;
2462 0 : err = -EOPNOTSUPP;
2463 0 : if (ops->ndo_set_vf_trust)
2464 0 : err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting);
2465 0 : if (err < 0)
2466 0 : return err;
2467 : }
2468 :
2469 0 : if (tb[IFLA_VF_IB_NODE_GUID]) {
2470 0 : struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]);
2471 :
2472 0 : if (ivt->vf >= INT_MAX)
2473 : return -EINVAL;
2474 0 : if (!ops->ndo_set_vf_guid)
2475 : return -EOPNOTSUPP;
2476 0 : return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID);
2477 : }
2478 :
2479 0 : if (tb[IFLA_VF_IB_PORT_GUID]) {
2480 0 : struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]);
2481 :
2482 0 : if (ivt->vf >= INT_MAX)
2483 : return -EINVAL;
2484 0 : if (!ops->ndo_set_vf_guid)
2485 : return -EOPNOTSUPP;
2486 :
2487 0 : return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID);
2488 : }
2489 :
2490 : return err;
2491 : }
2492 :
2493 0 : static int do_set_master(struct net_device *dev, int ifindex,
2494 : struct netlink_ext_ack *extack)
2495 : {
2496 0 : struct net_device *upper_dev = netdev_master_upper_dev_get(dev);
2497 0 : const struct net_device_ops *ops;
2498 0 : int err;
2499 :
2500 0 : if (upper_dev) {
2501 0 : if (upper_dev->ifindex == ifindex)
2502 : return 0;
2503 0 : ops = upper_dev->netdev_ops;
2504 0 : if (ops->ndo_del_slave) {
2505 0 : err = ops->ndo_del_slave(upper_dev, dev);
2506 0 : if (err)
2507 : return err;
2508 : } else {
2509 : return -EOPNOTSUPP;
2510 : }
2511 : }
2512 :
2513 0 : if (ifindex) {
2514 0 : upper_dev = __dev_get_by_index(dev_net(dev), ifindex);
2515 0 : if (!upper_dev)
2516 : return -EINVAL;
2517 0 : ops = upper_dev->netdev_ops;
2518 0 : if (ops->ndo_add_slave) {
2519 0 : err = ops->ndo_add_slave(upper_dev, dev, extack);
2520 0 : if (err)
2521 0 : return err;
2522 : } else {
2523 : return -EOPNOTSUPP;
2524 : }
2525 : }
2526 : return 0;
2527 : }
2528 :
2529 : static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = {
2530 : [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 },
2531 : [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 },
2532 : };
2533 :
2534 0 : static int do_set_proto_down(struct net_device *dev,
2535 : struct nlattr *nl_proto_down,
2536 : struct nlattr *nl_proto_down_reason,
2537 : struct netlink_ext_ack *extack)
2538 : {
2539 0 : struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1];
2540 0 : const struct net_device_ops *ops = dev->netdev_ops;
2541 0 : unsigned long mask = 0;
2542 0 : u32 value;
2543 0 : bool proto_down;
2544 0 : int err;
2545 :
2546 0 : if (!ops->ndo_change_proto_down) {
2547 0 : NL_SET_ERR_MSG(extack, "Protodown not supported by device");
2548 0 : return -EOPNOTSUPP;
2549 : }
2550 :
2551 0 : if (nl_proto_down_reason) {
2552 0 : err = nla_parse_nested_deprecated(pdreason,
2553 : IFLA_PROTO_DOWN_REASON_MAX,
2554 : nl_proto_down_reason,
2555 : ifla_proto_down_reason_policy,
2556 : NULL);
2557 0 : if (err < 0)
2558 : return err;
2559 :
2560 0 : if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) {
2561 0 : NL_SET_ERR_MSG(extack, "Invalid protodown reason value");
2562 0 : return -EINVAL;
2563 : }
2564 :
2565 0 : value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]);
2566 :
2567 0 : if (pdreason[IFLA_PROTO_DOWN_REASON_MASK])
2568 0 : mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]);
2569 :
2570 0 : dev_change_proto_down_reason(dev, mask, value);
2571 : }
2572 :
2573 0 : if (nl_proto_down) {
2574 0 : proto_down = nla_get_u8(nl_proto_down);
2575 :
2576 : /* Dont turn off protodown if there are active reasons */
2577 0 : if (!proto_down && dev->proto_down_reason) {
2578 0 : NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons");
2579 0 : return -EBUSY;
2580 : }
2581 0 : err = dev_change_proto_down(dev,
2582 : proto_down);
2583 0 : if (err)
2584 0 : return err;
2585 : }
2586 :
2587 : return 0;
2588 : }
2589 :
2590 : #define DO_SETLINK_MODIFIED 0x01
2591 : /* notify flag means notify + modified. */
2592 : #define DO_SETLINK_NOTIFY 0x03
2593 3 : static int do_setlink(const struct sk_buff *skb,
2594 : struct net_device *dev, struct ifinfomsg *ifm,
2595 : struct netlink_ext_ack *extack,
2596 : struct nlattr **tb, char *ifname, int status)
2597 : {
2598 3 : const struct net_device_ops *ops = dev->netdev_ops;
2599 3 : int err;
2600 :
2601 3 : err = validate_linkmsg(dev, tb);
2602 3 : if (err < 0)
2603 : return err;
2604 :
2605 3 : if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) {
2606 0 : struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev),
2607 : tb, CAP_NET_ADMIN);
2608 0 : if (IS_ERR(net)) {
2609 0 : err = PTR_ERR(net);
2610 0 : goto errout;
2611 : }
2612 :
2613 0 : err = dev_change_net_namespace(dev, net, ifname);
2614 0 : put_net(net);
2615 0 : if (err)
2616 0 : goto errout;
2617 0 : status |= DO_SETLINK_MODIFIED;
2618 : }
2619 :
2620 3 : if (tb[IFLA_MAP]) {
2621 0 : struct rtnl_link_ifmap *u_map;
2622 0 : struct ifmap k_map;
2623 :
2624 0 : if (!ops->ndo_set_config) {
2625 0 : err = -EOPNOTSUPP;
2626 0 : goto errout;
2627 : }
2628 :
2629 0 : if (!netif_device_present(dev)) {
2630 0 : err = -ENODEV;
2631 0 : goto errout;
2632 : }
2633 :
2634 0 : u_map = nla_data(tb[IFLA_MAP]);
2635 0 : k_map.mem_start = (unsigned long) u_map->mem_start;
2636 0 : k_map.mem_end = (unsigned long) u_map->mem_end;
2637 0 : k_map.base_addr = (unsigned short) u_map->base_addr;
2638 0 : k_map.irq = (unsigned char) u_map->irq;
2639 0 : k_map.dma = (unsigned char) u_map->dma;
2640 0 : k_map.port = (unsigned char) u_map->port;
2641 :
2642 0 : err = ops->ndo_set_config(dev, &k_map);
2643 0 : if (err < 0)
2644 0 : goto errout;
2645 :
2646 0 : status |= DO_SETLINK_NOTIFY;
2647 : }
2648 :
2649 3 : if (tb[IFLA_ADDRESS]) {
2650 0 : struct sockaddr *sa;
2651 0 : int len;
2652 :
2653 0 : len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
2654 : sizeof(*sa));
2655 0 : sa = kmalloc(len, GFP_KERNEL);
2656 0 : if (!sa) {
2657 0 : err = -ENOMEM;
2658 0 : goto errout;
2659 : }
2660 0 : sa->sa_family = dev->type;
2661 0 : memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
2662 0 : dev->addr_len);
2663 0 : err = dev_set_mac_address_user(dev, sa, extack);
2664 0 : kfree(sa);
2665 0 : if (err)
2666 0 : goto errout;
2667 0 : status |= DO_SETLINK_MODIFIED;
2668 : }
2669 :
2670 3 : if (tb[IFLA_MTU]) {
2671 0 : err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack);
2672 0 : if (err < 0)
2673 0 : goto errout;
2674 0 : status |= DO_SETLINK_MODIFIED;
2675 : }
2676 :
2677 3 : if (tb[IFLA_GROUP]) {
2678 0 : dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
2679 0 : status |= DO_SETLINK_NOTIFY;
2680 : }
2681 :
2682 : /*
2683 : * Interface selected by interface index but interface
2684 : * name provided implies that a name change has been
2685 : * requested.
2686 : */
2687 3 : if (ifm->ifi_index > 0 && ifname[0]) {
2688 0 : err = dev_change_name(dev, ifname);
2689 0 : if (err < 0)
2690 0 : goto errout;
2691 0 : status |= DO_SETLINK_MODIFIED;
2692 : }
2693 :
2694 3 : if (tb[IFLA_IFALIAS]) {
2695 0 : err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]),
2696 0 : nla_len(tb[IFLA_IFALIAS]));
2697 0 : if (err < 0)
2698 0 : goto errout;
2699 0 : status |= DO_SETLINK_NOTIFY;
2700 : }
2701 :
2702 3 : if (tb[IFLA_BROADCAST]) {
2703 0 : nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
2704 0 : call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
2705 : }
2706 :
2707 3 : if (ifm->ifi_flags || ifm->ifi_change) {
2708 6 : err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
2709 : extack);
2710 3 : if (err < 0)
2711 0 : goto errout;
2712 : }
2713 :
2714 3 : if (tb[IFLA_MASTER]) {
2715 0 : err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
2716 0 : if (err)
2717 0 : goto errout;
2718 0 : status |= DO_SETLINK_MODIFIED;
2719 : }
2720 :
2721 3 : if (tb[IFLA_CARRIER]) {
2722 0 : err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
2723 0 : if (err)
2724 0 : goto errout;
2725 0 : status |= DO_SETLINK_MODIFIED;
2726 : }
2727 :
2728 3 : if (tb[IFLA_TXQLEN]) {
2729 0 : unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
2730 :
2731 0 : err = dev_change_tx_queue_len(dev, value);
2732 0 : if (err)
2733 0 : goto errout;
2734 0 : status |= DO_SETLINK_MODIFIED;
2735 : }
2736 :
2737 3 : if (tb[IFLA_GSO_MAX_SIZE]) {
2738 0 : u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]);
2739 :
2740 0 : if (max_size > GSO_MAX_SIZE) {
2741 0 : err = -EINVAL;
2742 0 : goto errout;
2743 : }
2744 :
2745 0 : if (dev->gso_max_size ^ max_size) {
2746 0 : netif_set_gso_max_size(dev, max_size);
2747 0 : status |= DO_SETLINK_MODIFIED;
2748 : }
2749 : }
2750 :
2751 3 : if (tb[IFLA_GSO_MAX_SEGS]) {
2752 0 : u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
2753 :
2754 0 : if (max_segs > GSO_MAX_SEGS) {
2755 0 : err = -EINVAL;
2756 0 : goto errout;
2757 : }
2758 :
2759 0 : if (dev->gso_max_segs ^ max_segs) {
2760 0 : dev->gso_max_segs = max_segs;
2761 0 : status |= DO_SETLINK_MODIFIED;
2762 : }
2763 : }
2764 :
2765 3 : if (tb[IFLA_OPERSTATE])
2766 0 : set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
2767 :
2768 3 : if (tb[IFLA_LINKMODE]) {
2769 0 : unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]);
2770 :
2771 0 : write_lock_bh(&dev_base_lock);
2772 0 : if (dev->link_mode ^ value)
2773 0 : status |= DO_SETLINK_NOTIFY;
2774 0 : dev->link_mode = value;
2775 0 : write_unlock_bh(&dev_base_lock);
2776 : }
2777 :
2778 3 : if (tb[IFLA_VFINFO_LIST]) {
2779 0 : struct nlattr *vfinfo[IFLA_VF_MAX + 1];
2780 0 : struct nlattr *attr;
2781 0 : int rem;
2782 :
2783 0 : nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) {
2784 0 : if (nla_type(attr) != IFLA_VF_INFO ||
2785 0 : nla_len(attr) < NLA_HDRLEN) {
2786 0 : err = -EINVAL;
2787 0 : goto errout;
2788 : }
2789 0 : err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX,
2790 : attr,
2791 : ifla_vf_policy,
2792 : NULL);
2793 0 : if (err < 0)
2794 0 : goto errout;
2795 0 : err = do_setvfinfo(dev, vfinfo);
2796 0 : if (err < 0)
2797 0 : goto errout;
2798 0 : status |= DO_SETLINK_NOTIFY;
2799 : }
2800 : }
2801 3 : err = 0;
2802 :
2803 3 : if (tb[IFLA_VF_PORTS]) {
2804 0 : struct nlattr *port[IFLA_PORT_MAX+1];
2805 0 : struct nlattr *attr;
2806 0 : int vf;
2807 0 : int rem;
2808 :
2809 0 : err = -EOPNOTSUPP;
2810 0 : if (!ops->ndo_set_vf_port)
2811 0 : goto errout;
2812 :
2813 0 : nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) {
2814 0 : if (nla_type(attr) != IFLA_VF_PORT ||
2815 0 : nla_len(attr) < NLA_HDRLEN) {
2816 0 : err = -EINVAL;
2817 0 : goto errout;
2818 : }
2819 0 : err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2820 : attr,
2821 : ifla_port_policy,
2822 : NULL);
2823 0 : if (err < 0)
2824 0 : goto errout;
2825 0 : if (!port[IFLA_PORT_VF]) {
2826 0 : err = -EOPNOTSUPP;
2827 0 : goto errout;
2828 : }
2829 0 : vf = nla_get_u32(port[IFLA_PORT_VF]);
2830 0 : err = ops->ndo_set_vf_port(dev, vf, port);
2831 0 : if (err < 0)
2832 0 : goto errout;
2833 0 : status |= DO_SETLINK_NOTIFY;
2834 : }
2835 : }
2836 3 : err = 0;
2837 :
2838 3 : if (tb[IFLA_PORT_SELF]) {
2839 0 : struct nlattr *port[IFLA_PORT_MAX+1];
2840 :
2841 0 : err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX,
2842 : tb[IFLA_PORT_SELF],
2843 : ifla_port_policy, NULL);
2844 0 : if (err < 0)
2845 0 : goto errout;
2846 :
2847 0 : err = -EOPNOTSUPP;
2848 0 : if (ops->ndo_set_vf_port)
2849 0 : err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port);
2850 0 : if (err < 0)
2851 0 : goto errout;
2852 0 : status |= DO_SETLINK_NOTIFY;
2853 : }
2854 :
2855 3 : if (tb[IFLA_AF_SPEC]) {
2856 0 : struct nlattr *af;
2857 0 : int rem;
2858 :
2859 0 : nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) {
2860 0 : const struct rtnl_af_ops *af_ops;
2861 :
2862 0 : rcu_read_lock();
2863 :
2864 0 : BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af))));
2865 :
2866 0 : err = af_ops->set_link_af(dev, af);
2867 0 : if (err < 0) {
2868 0 : rcu_read_unlock();
2869 0 : goto errout;
2870 : }
2871 :
2872 0 : rcu_read_unlock();
2873 0 : status |= DO_SETLINK_NOTIFY;
2874 : }
2875 : }
2876 3 : err = 0;
2877 :
2878 3 : if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) {
2879 0 : err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN],
2880 : tb[IFLA_PROTO_DOWN_REASON], extack);
2881 0 : if (err)
2882 0 : goto errout;
2883 0 : status |= DO_SETLINK_NOTIFY;
2884 : }
2885 :
2886 3 : if (tb[IFLA_XDP]) {
2887 0 : struct nlattr *xdp[IFLA_XDP_MAX + 1];
2888 0 : u32 xdp_flags = 0;
2889 :
2890 0 : err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX,
2891 : tb[IFLA_XDP],
2892 : ifla_xdp_policy, NULL);
2893 0 : if (err < 0)
2894 0 : goto errout;
2895 :
2896 0 : if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
2897 0 : err = -EINVAL;
2898 0 : goto errout;
2899 : }
2900 :
2901 0 : if (xdp[IFLA_XDP_FLAGS]) {
2902 0 : xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]);
2903 0 : if (xdp_flags & ~XDP_FLAGS_MASK) {
2904 0 : err = -EINVAL;
2905 0 : goto errout;
2906 : }
2907 0 : if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
2908 0 : err = -EINVAL;
2909 0 : goto errout;
2910 : }
2911 : }
2912 :
2913 0 : if (xdp[IFLA_XDP_FD]) {
2914 0 : int expected_fd = -1;
2915 :
2916 0 : if (xdp_flags & XDP_FLAGS_REPLACE) {
2917 0 : if (!xdp[IFLA_XDP_EXPECTED_FD]) {
2918 0 : err = -EINVAL;
2919 0 : goto errout;
2920 : }
2921 0 : expected_fd =
2922 0 : nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]);
2923 : }
2924 :
2925 0 : err = dev_change_xdp_fd(dev, extack,
2926 0 : nla_get_s32(xdp[IFLA_XDP_FD]),
2927 : expected_fd,
2928 : xdp_flags);
2929 0 : if (err)
2930 0 : goto errout;
2931 0 : status |= DO_SETLINK_NOTIFY;
2932 : }
2933 : }
2934 :
2935 3 : errout:
2936 3 : if (status & DO_SETLINK_MODIFIED) {
2937 0 : if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY)
2938 0 : netdev_state_change(dev);
2939 :
2940 0 : if (err < 0)
2941 0 : 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",
2942 : dev->name);
2943 : }
2944 :
2945 : return err;
2946 : }
2947 :
2948 0 : static struct net_device *rtnl_dev_get(struct net *net,
2949 : struct nlattr *ifname_attr,
2950 : struct nlattr *altifname_attr,
2951 : char *ifname)
2952 : {
2953 0 : char buffer[ALTIFNAMSIZ];
2954 :
2955 0 : if (!ifname) {
2956 0 : ifname = buffer;
2957 0 : if (ifname_attr)
2958 0 : nla_strscpy(ifname, ifname_attr, IFNAMSIZ);
2959 0 : else if (altifname_attr)
2960 0 : nla_strscpy(ifname, altifname_attr, ALTIFNAMSIZ);
2961 : else
2962 : return NULL;
2963 : }
2964 :
2965 0 : return __dev_get_by_name(net, ifname);
2966 : }
2967 :
2968 1 : static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
2969 : struct netlink_ext_ack *extack)
2970 : {
2971 1 : struct net *net = sock_net(skb->sk);
2972 1 : struct ifinfomsg *ifm;
2973 1 : struct net_device *dev;
2974 1 : int err;
2975 1 : struct nlattr *tb[IFLA_MAX+1];
2976 1 : char ifname[IFNAMSIZ];
2977 :
2978 1 : err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
2979 : ifla_policy, extack);
2980 1 : if (err < 0)
2981 0 : goto errout;
2982 :
2983 1 : err = rtnl_ensure_unique_netns(tb, extack, false);
2984 1 : if (err < 0)
2985 0 : goto errout;
2986 :
2987 1 : if (tb[IFLA_IFNAME])
2988 0 : nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
2989 : else
2990 1 : ifname[0] = '\0';
2991 :
2992 1 : err = -EINVAL;
2993 1 : ifm = nlmsg_data(nlh);
2994 1 : if (ifm->ifi_index > 0)
2995 1 : dev = __dev_get_by_index(net, ifm->ifi_index);
2996 0 : else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
2997 0 : dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname);
2998 : else
2999 0 : goto errout;
3000 :
3001 1 : if (dev == NULL) {
3002 0 : err = -ENODEV;
3003 0 : goto errout;
3004 : }
3005 :
3006 1 : err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
3007 1 : errout:
3008 1 : return err;
3009 : }
3010 :
3011 0 : static int rtnl_group_dellink(const struct net *net, int group)
3012 : {
3013 0 : struct net_device *dev, *aux;
3014 0 : LIST_HEAD(list_kill);
3015 0 : bool found = false;
3016 :
3017 0 : if (!group)
3018 : return -EPERM;
3019 :
3020 0 : for_each_netdev(net, dev) {
3021 0 : if (dev->group == group) {
3022 0 : const struct rtnl_link_ops *ops;
3023 :
3024 0 : found = true;
3025 0 : ops = dev->rtnl_link_ops;
3026 0 : if (!ops || !ops->dellink)
3027 : return -EOPNOTSUPP;
3028 : }
3029 : }
3030 :
3031 0 : if (!found)
3032 : return -ENODEV;
3033 :
3034 0 : for_each_netdev_safe(net, dev, aux) {
3035 0 : if (dev->group == group) {
3036 0 : const struct rtnl_link_ops *ops;
3037 :
3038 0 : ops = dev->rtnl_link_ops;
3039 0 : ops->dellink(dev, &list_kill);
3040 : }
3041 : }
3042 0 : unregister_netdevice_many(&list_kill);
3043 :
3044 0 : return 0;
3045 : }
3046 :
3047 0 : int rtnl_delete_link(struct net_device *dev)
3048 : {
3049 0 : const struct rtnl_link_ops *ops;
3050 0 : LIST_HEAD(list_kill);
3051 :
3052 0 : ops = dev->rtnl_link_ops;
3053 0 : if (!ops || !ops->dellink)
3054 : return -EOPNOTSUPP;
3055 :
3056 0 : ops->dellink(dev, &list_kill);
3057 0 : unregister_netdevice_many(&list_kill);
3058 :
3059 0 : return 0;
3060 : }
3061 : EXPORT_SYMBOL_GPL(rtnl_delete_link);
3062 :
3063 0 : static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
3064 : struct netlink_ext_ack *extack)
3065 : {
3066 0 : struct net *net = sock_net(skb->sk);
3067 0 : struct net *tgt_net = net;
3068 0 : struct net_device *dev = NULL;
3069 0 : struct ifinfomsg *ifm;
3070 0 : struct nlattr *tb[IFLA_MAX+1];
3071 0 : int err;
3072 0 : int netnsid = -1;
3073 :
3074 0 : err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3075 : ifla_policy, extack);
3076 0 : if (err < 0)
3077 : return err;
3078 :
3079 0 : err = rtnl_ensure_unique_netns(tb, extack, true);
3080 0 : if (err < 0)
3081 : return err;
3082 :
3083 0 : if (tb[IFLA_TARGET_NETNSID]) {
3084 0 : netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3085 0 : tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3086 0 : if (IS_ERR(tgt_net))
3087 0 : return PTR_ERR(tgt_net);
3088 : }
3089 :
3090 0 : err = -EINVAL;
3091 0 : ifm = nlmsg_data(nlh);
3092 0 : if (ifm->ifi_index > 0)
3093 0 : dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3094 0 : else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3095 0 : dev = rtnl_dev_get(net, tb[IFLA_IFNAME],
3096 : tb[IFLA_ALT_IFNAME], NULL);
3097 0 : else if (tb[IFLA_GROUP])
3098 0 : err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP]));
3099 : else
3100 0 : goto out;
3101 :
3102 0 : if (!dev) {
3103 0 : if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
3104 0 : err = -ENODEV;
3105 :
3106 0 : goto out;
3107 : }
3108 :
3109 0 : err = rtnl_delete_link(dev);
3110 :
3111 : out:
3112 : if (netnsid >= 0)
3113 0 : put_net(tgt_net);
3114 :
3115 : return err;
3116 : }
3117 :
3118 0 : int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm)
3119 : {
3120 0 : unsigned int old_flags;
3121 0 : int err;
3122 :
3123 0 : old_flags = dev->flags;
3124 0 : if (ifm && (ifm->ifi_flags || ifm->ifi_change)) {
3125 0 : err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
3126 : NULL);
3127 0 : if (err < 0)
3128 : return err;
3129 : }
3130 :
3131 0 : if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) {
3132 0 : __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags));
3133 : } else {
3134 0 : dev->rtnl_link_state = RTNL_LINK_INITIALIZED;
3135 0 : __dev_notify_flags(dev, old_flags, ~0U);
3136 : }
3137 : return 0;
3138 : }
3139 : EXPORT_SYMBOL(rtnl_configure_link);
3140 :
3141 0 : struct net_device *rtnl_create_link(struct net *net, const char *ifname,
3142 : unsigned char name_assign_type,
3143 : const struct rtnl_link_ops *ops,
3144 : struct nlattr *tb[],
3145 : struct netlink_ext_ack *extack)
3146 : {
3147 0 : struct net_device *dev;
3148 0 : unsigned int num_tx_queues = 1;
3149 0 : unsigned int num_rx_queues = 1;
3150 :
3151 0 : if (tb[IFLA_NUM_TX_QUEUES])
3152 0 : num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]);
3153 0 : else if (ops->get_num_tx_queues)
3154 0 : num_tx_queues = ops->get_num_tx_queues();
3155 :
3156 0 : if (tb[IFLA_NUM_RX_QUEUES])
3157 0 : num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
3158 0 : else if (ops->get_num_rx_queues)
3159 0 : num_rx_queues = ops->get_num_rx_queues();
3160 :
3161 0 : if (num_tx_queues < 1 || num_tx_queues > 4096) {
3162 0 : NL_SET_ERR_MSG(extack, "Invalid number of transmit queues");
3163 0 : return ERR_PTR(-EINVAL);
3164 : }
3165 :
3166 0 : if (num_rx_queues < 1 || num_rx_queues > 4096) {
3167 0 : NL_SET_ERR_MSG(extack, "Invalid number of receive queues");
3168 0 : return ERR_PTR(-EINVAL);
3169 : }
3170 :
3171 0 : dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
3172 : ops->setup, num_tx_queues, num_rx_queues);
3173 0 : if (!dev)
3174 0 : return ERR_PTR(-ENOMEM);
3175 :
3176 0 : dev_net_set(dev, net);
3177 0 : dev->rtnl_link_ops = ops;
3178 0 : dev->rtnl_link_state = RTNL_LINK_INITIALIZING;
3179 :
3180 0 : if (tb[IFLA_MTU]) {
3181 0 : u32 mtu = nla_get_u32(tb[IFLA_MTU]);
3182 0 : int err;
3183 :
3184 0 : err = dev_validate_mtu(dev, mtu, extack);
3185 0 : if (err) {
3186 0 : free_netdev(dev);
3187 0 : return ERR_PTR(err);
3188 : }
3189 0 : dev->mtu = mtu;
3190 : }
3191 0 : if (tb[IFLA_ADDRESS]) {
3192 0 : memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
3193 0 : nla_len(tb[IFLA_ADDRESS]));
3194 0 : dev->addr_assign_type = NET_ADDR_SET;
3195 : }
3196 0 : if (tb[IFLA_BROADCAST])
3197 0 : memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
3198 0 : nla_len(tb[IFLA_BROADCAST]));
3199 0 : if (tb[IFLA_TXQLEN])
3200 0 : dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
3201 0 : if (tb[IFLA_OPERSTATE])
3202 0 : set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
3203 0 : if (tb[IFLA_LINKMODE])
3204 0 : dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
3205 0 : if (tb[IFLA_GROUP])
3206 0 : dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
3207 0 : if (tb[IFLA_GSO_MAX_SIZE])
3208 0 : netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE]));
3209 0 : if (tb[IFLA_GSO_MAX_SEGS])
3210 0 : dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]);
3211 :
3212 : return dev;
3213 : }
3214 : EXPORT_SYMBOL(rtnl_create_link);
3215 :
3216 0 : static int rtnl_group_changelink(const struct sk_buff *skb,
3217 : struct net *net, int group,
3218 : struct ifinfomsg *ifm,
3219 : struct netlink_ext_ack *extack,
3220 : struct nlattr **tb)
3221 : {
3222 0 : struct net_device *dev, *aux;
3223 0 : int err;
3224 :
3225 0 : for_each_netdev_safe(net, dev, aux) {
3226 0 : if (dev->group == group) {
3227 0 : err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
3228 0 : if (err < 0)
3229 0 : return err;
3230 : }
3231 : }
3232 :
3233 : return 0;
3234 : }
3235 :
3236 4 : static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3237 : struct nlattr **attr, struct netlink_ext_ack *extack)
3238 : {
3239 4 : struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1];
3240 4 : unsigned char name_assign_type = NET_NAME_USER;
3241 4 : struct nlattr *linkinfo[IFLA_INFO_MAX + 1];
3242 4 : const struct rtnl_link_ops *m_ops = NULL;
3243 4 : struct net_device *master_dev = NULL;
3244 4 : struct net *net = sock_net(skb->sk);
3245 4 : const struct rtnl_link_ops *ops;
3246 4 : struct nlattr *tb[IFLA_MAX + 1];
3247 4 : struct net *dest_net, *link_net;
3248 4 : struct nlattr **slave_data;
3249 4 : char kind[MODULE_NAME_LEN];
3250 4 : struct net_device *dev;
3251 4 : struct ifinfomsg *ifm;
3252 4 : char ifname[IFNAMSIZ];
3253 4 : struct nlattr **data;
3254 4 : int err;
3255 :
3256 : #ifdef CONFIG_MODULES
3257 : replay:
3258 : #endif
3259 4 : err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3260 : ifla_policy, extack);
3261 4 : if (err < 0)
3262 : return err;
3263 :
3264 4 : err = rtnl_ensure_unique_netns(tb, extack, false);
3265 4 : if (err < 0)
3266 : return err;
3267 :
3268 4 : if (tb[IFLA_IFNAME])
3269 0 : nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
3270 : else
3271 4 : ifname[0] = '\0';
3272 :
3273 4 : ifm = nlmsg_data(nlh);
3274 4 : if (ifm->ifi_index > 0)
3275 2 : dev = __dev_get_by_index(net, ifm->ifi_index);
3276 2 : else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3277 0 : dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname);
3278 : else
3279 : dev = NULL;
3280 :
3281 2 : if (dev) {
3282 2 : master_dev = netdev_master_upper_dev_get(dev);
3283 2 : if (master_dev)
3284 0 : m_ops = master_dev->rtnl_link_ops;
3285 : }
3286 :
3287 4 : err = validate_linkmsg(dev, tb);
3288 4 : if (err < 0)
3289 : return err;
3290 :
3291 4 : if (tb[IFLA_LINKINFO]) {
3292 0 : err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX,
3293 : tb[IFLA_LINKINFO],
3294 : ifla_info_policy, NULL);
3295 0 : if (err < 0)
3296 : return err;
3297 : } else
3298 4 : memset(linkinfo, 0, sizeof(linkinfo));
3299 :
3300 4 : if (linkinfo[IFLA_INFO_KIND]) {
3301 0 : nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind));
3302 0 : ops = rtnl_link_ops_get(kind);
3303 : } else {
3304 4 : kind[0] = '\0';
3305 4 : ops = NULL;
3306 : }
3307 :
3308 4 : data = NULL;
3309 4 : if (ops) {
3310 0 : if (ops->maxtype > RTNL_MAX_TYPE)
3311 : return -EINVAL;
3312 :
3313 0 : if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
3314 0 : err = nla_parse_nested_deprecated(attr, ops->maxtype,
3315 : linkinfo[IFLA_INFO_DATA],
3316 : ops->policy, extack);
3317 0 : if (err < 0)
3318 : return err;
3319 : data = attr;
3320 : }
3321 0 : if (ops->validate) {
3322 0 : err = ops->validate(tb, data, extack);
3323 0 : if (err < 0)
3324 : return err;
3325 : }
3326 : }
3327 :
3328 4 : slave_data = NULL;
3329 4 : if (m_ops) {
3330 0 : if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)
3331 : return -EINVAL;
3332 :
3333 0 : if (m_ops->slave_maxtype &&
3334 0 : linkinfo[IFLA_INFO_SLAVE_DATA]) {
3335 0 : err = nla_parse_nested_deprecated(slave_attr,
3336 : m_ops->slave_maxtype,
3337 : linkinfo[IFLA_INFO_SLAVE_DATA],
3338 : m_ops->slave_policy,
3339 : extack);
3340 0 : if (err < 0)
3341 : return err;
3342 : slave_data = slave_attr;
3343 : }
3344 : }
3345 :
3346 4 : if (dev) {
3347 2 : int status = 0;
3348 :
3349 2 : if (nlh->nlmsg_flags & NLM_F_EXCL)
3350 : return -EEXIST;
3351 2 : if (nlh->nlmsg_flags & NLM_F_REPLACE)
3352 : return -EOPNOTSUPP;
3353 :
3354 2 : if (linkinfo[IFLA_INFO_DATA]) {
3355 0 : if (!ops || ops != dev->rtnl_link_ops ||
3356 0 : !ops->changelink)
3357 : return -EOPNOTSUPP;
3358 :
3359 0 : err = ops->changelink(dev, tb, data, extack);
3360 0 : if (err < 0)
3361 : return err;
3362 : status |= DO_SETLINK_NOTIFY;
3363 : }
3364 :
3365 2 : if (linkinfo[IFLA_INFO_SLAVE_DATA]) {
3366 0 : if (!m_ops || !m_ops->slave_changelink)
3367 : return -EOPNOTSUPP;
3368 :
3369 0 : err = m_ops->slave_changelink(master_dev, dev, tb,
3370 : slave_data, extack);
3371 0 : if (err < 0)
3372 : return err;
3373 : status |= DO_SETLINK_NOTIFY;
3374 : }
3375 :
3376 2 : return do_setlink(skb, dev, ifm, extack, tb, ifname, status);
3377 : }
3378 :
3379 2 : if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
3380 2 : if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
3381 0 : return rtnl_group_changelink(skb, net,
3382 0 : nla_get_u32(tb[IFLA_GROUP]),
3383 : ifm, extack, tb);
3384 : return -ENODEV;
3385 : }
3386 :
3387 0 : if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
3388 : return -EOPNOTSUPP;
3389 :
3390 0 : if (!ops) {
3391 : #ifdef CONFIG_MODULES
3392 : if (kind[0]) {
3393 : __rtnl_unlock();
3394 : request_module("rtnl-link-%s", kind);
3395 : rtnl_lock();
3396 : ops = rtnl_link_ops_get(kind);
3397 : if (ops)
3398 : goto replay;
3399 : }
3400 : #endif
3401 0 : NL_SET_ERR_MSG(extack, "Unknown device type");
3402 0 : return -EOPNOTSUPP;
3403 : }
3404 :
3405 0 : if (!ops->setup)
3406 : return -EOPNOTSUPP;
3407 :
3408 0 : if (!ifname[0]) {
3409 0 : snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind);
3410 0 : name_assign_type = NET_NAME_ENUM;
3411 : }
3412 :
3413 0 : dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN);
3414 0 : if (IS_ERR(dest_net))
3415 0 : return PTR_ERR(dest_net);
3416 :
3417 0 : if (tb[IFLA_LINK_NETNSID]) {
3418 0 : int id = nla_get_s32(tb[IFLA_LINK_NETNSID]);
3419 :
3420 0 : link_net = get_net_ns_by_id(dest_net, id);
3421 0 : if (!link_net) {
3422 0 : NL_SET_ERR_MSG(extack, "Unknown network namespace id");
3423 0 : err = -EINVAL;
3424 0 : goto out;
3425 : }
3426 0 : err = -EPERM;
3427 0 : if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN))
3428 0 : goto out;
3429 : } else {
3430 : link_net = NULL;
3431 : }
3432 :
3433 0 : dev = rtnl_create_link(link_net ? : dest_net, ifname,
3434 : name_assign_type, ops, tb, extack);
3435 0 : if (IS_ERR(dev)) {
3436 0 : err = PTR_ERR(dev);
3437 0 : goto out;
3438 : }
3439 :
3440 0 : dev->ifindex = ifm->ifi_index;
3441 :
3442 0 : if (ops->newlink)
3443 0 : err = ops->newlink(link_net ? : net, dev, tb, data, extack);
3444 : else
3445 0 : err = register_netdevice(dev);
3446 0 : if (err < 0) {
3447 0 : free_netdev(dev);
3448 0 : goto out;
3449 : }
3450 :
3451 0 : err = rtnl_configure_link(dev, ifm);
3452 0 : if (err < 0)
3453 0 : goto out_unregister;
3454 0 : if (link_net) {
3455 0 : err = dev_change_net_namespace(dev, dest_net, ifname);
3456 0 : if (err < 0)
3457 0 : goto out_unregister;
3458 : }
3459 0 : if (tb[IFLA_MASTER]) {
3460 0 : err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
3461 0 : if (err)
3462 0 : goto out_unregister;
3463 : }
3464 0 : out:
3465 : if (link_net)
3466 4 : put_net(link_net);
3467 4 : put_net(dest_net);
3468 : return err;
3469 0 : out_unregister:
3470 0 : if (ops->newlink) {
3471 0 : LIST_HEAD(list_kill);
3472 :
3473 0 : ops->dellink(dev, &list_kill);
3474 0 : unregister_netdevice_many(&list_kill);
3475 : } else {
3476 0 : unregister_netdevice(dev);
3477 : }
3478 0 : goto out;
3479 : }
3480 :
3481 4 : static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3482 : struct netlink_ext_ack *extack)
3483 : {
3484 4 : struct nlattr **attr;
3485 4 : int ret;
3486 :
3487 4 : attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL);
3488 4 : if (!attr)
3489 : return -ENOMEM;
3490 :
3491 4 : ret = __rtnl_newlink(skb, nlh, attr, extack);
3492 4 : kfree(attr);
3493 4 : return ret;
3494 : }
3495 :
3496 0 : static int rtnl_valid_getlink_req(struct sk_buff *skb,
3497 : const struct nlmsghdr *nlh,
3498 : struct nlattr **tb,
3499 : struct netlink_ext_ack *extack)
3500 : {
3501 0 : struct ifinfomsg *ifm;
3502 0 : int i, err;
3503 :
3504 0 : if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
3505 0 : NL_SET_ERR_MSG(extack, "Invalid header for get link");
3506 0 : return -EINVAL;
3507 : }
3508 :
3509 0 : if (!netlink_strict_get_check(skb))
3510 0 : return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX,
3511 : ifla_policy, extack);
3512 :
3513 0 : ifm = nlmsg_data(nlh);
3514 0 : if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
3515 0 : ifm->ifi_change) {
3516 0 : NL_SET_ERR_MSG(extack, "Invalid values in header for get link request");
3517 0 : return -EINVAL;
3518 : }
3519 :
3520 0 : err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX,
3521 : ifla_policy, extack);
3522 0 : if (err)
3523 : return err;
3524 :
3525 0 : for (i = 0; i <= IFLA_MAX; i++) {
3526 0 : if (!tb[i])
3527 0 : continue;
3528 :
3529 0 : switch (i) {
3530 : case IFLA_IFNAME:
3531 : case IFLA_ALT_IFNAME:
3532 : case IFLA_EXT_MASK:
3533 : case IFLA_TARGET_NETNSID:
3534 : break;
3535 0 : default:
3536 0 : NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request");
3537 : return -EINVAL;
3538 : }
3539 : }
3540 :
3541 : return 0;
3542 : }
3543 :
3544 0 : static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
3545 : struct netlink_ext_ack *extack)
3546 : {
3547 0 : struct net *net = sock_net(skb->sk);
3548 0 : struct net *tgt_net = net;
3549 0 : struct ifinfomsg *ifm;
3550 0 : struct nlattr *tb[IFLA_MAX+1];
3551 0 : struct net_device *dev = NULL;
3552 0 : struct sk_buff *nskb;
3553 0 : int netnsid = -1;
3554 0 : int err;
3555 0 : u32 ext_filter_mask = 0;
3556 :
3557 0 : err = rtnl_valid_getlink_req(skb, nlh, tb, extack);
3558 0 : if (err < 0)
3559 : return err;
3560 :
3561 0 : err = rtnl_ensure_unique_netns(tb, extack, true);
3562 0 : if (err < 0)
3563 : return err;
3564 :
3565 0 : if (tb[IFLA_TARGET_NETNSID]) {
3566 0 : netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]);
3567 0 : tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid);
3568 0 : if (IS_ERR(tgt_net))
3569 0 : return PTR_ERR(tgt_net);
3570 : }
3571 :
3572 0 : if (tb[IFLA_EXT_MASK])
3573 0 : ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3574 :
3575 0 : err = -EINVAL;
3576 0 : ifm = nlmsg_data(nlh);
3577 0 : if (ifm->ifi_index > 0)
3578 0 : dev = __dev_get_by_index(tgt_net, ifm->ifi_index);
3579 0 : else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3580 0 : dev = rtnl_dev_get(tgt_net, tb[IFLA_IFNAME],
3581 : tb[IFLA_ALT_IFNAME], NULL);
3582 : else
3583 0 : goto out;
3584 :
3585 0 : err = -ENODEV;
3586 0 : if (dev == NULL)
3587 0 : goto out;
3588 :
3589 0 : err = -ENOBUFS;
3590 0 : nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL);
3591 0 : if (nskb == NULL)
3592 0 : goto out;
3593 :
3594 0 : err = rtnl_fill_ifinfo(nskb, dev, net,
3595 : RTM_NEWLINK, NETLINK_CB(skb).portid,
3596 : nlh->nlmsg_seq, 0, 0, ext_filter_mask,
3597 : 0, NULL, 0, netnsid, GFP_KERNEL);
3598 0 : if (err < 0) {
3599 : /* -EMSGSIZE implies BUG in if_nlmsg_size */
3600 0 : WARN_ON(err == -EMSGSIZE);
3601 0 : kfree_skb(nskb);
3602 : } else
3603 0 : err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
3604 : out:
3605 : if (netnsid >= 0)
3606 0 : put_net(tgt_net);
3607 :
3608 : return err;
3609 : }
3610 :
3611 0 : static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
3612 : bool *changed, struct netlink_ext_ack *extack)
3613 : {
3614 0 : char *alt_ifname;
3615 0 : int err;
3616 :
3617 0 : err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
3618 0 : if (err)
3619 : return err;
3620 :
3621 0 : alt_ifname = nla_strdup(attr, GFP_KERNEL);
3622 0 : if (!alt_ifname)
3623 : return -ENOMEM;
3624 :
3625 0 : if (cmd == RTM_NEWLINKPROP) {
3626 0 : err = netdev_name_node_alt_create(dev, alt_ifname);
3627 0 : if (!err)
3628 0 : alt_ifname = NULL;
3629 0 : } else if (cmd == RTM_DELLINKPROP) {
3630 0 : err = netdev_name_node_alt_destroy(dev, alt_ifname);
3631 : } else {
3632 0 : WARN_ON_ONCE(1);
3633 0 : err = -EINVAL;
3634 : }
3635 :
3636 0 : kfree(alt_ifname);
3637 0 : if (!err)
3638 0 : *changed = true;
3639 : return err;
3640 : }
3641 :
3642 0 : static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh,
3643 : struct netlink_ext_ack *extack)
3644 : {
3645 0 : struct net *net = sock_net(skb->sk);
3646 0 : struct nlattr *tb[IFLA_MAX + 1];
3647 0 : struct net_device *dev;
3648 0 : struct ifinfomsg *ifm;
3649 0 : bool changed = false;
3650 0 : struct nlattr *attr;
3651 0 : int err, rem;
3652 :
3653 0 : err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
3654 0 : if (err)
3655 : return err;
3656 :
3657 0 : err = rtnl_ensure_unique_netns(tb, extack, true);
3658 0 : if (err)
3659 : return err;
3660 :
3661 0 : ifm = nlmsg_data(nlh);
3662 0 : if (ifm->ifi_index > 0)
3663 0 : dev = __dev_get_by_index(net, ifm->ifi_index);
3664 0 : else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME])
3665 0 : dev = rtnl_dev_get(net, tb[IFLA_IFNAME],
3666 : tb[IFLA_ALT_IFNAME], NULL);
3667 : else
3668 : return -EINVAL;
3669 :
3670 0 : if (!dev)
3671 : return -ENODEV;
3672 :
3673 0 : if (!tb[IFLA_PROP_LIST])
3674 : return 0;
3675 :
3676 0 : nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) {
3677 0 : switch (nla_type(attr)) {
3678 0 : case IFLA_ALT_IFNAME:
3679 0 : err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack);
3680 0 : if (err)
3681 0 : return err;
3682 : break;
3683 : }
3684 0 : }
3685 :
3686 0 : if (changed)
3687 0 : netdev_state_change(dev);
3688 : return 0;
3689 : }
3690 :
3691 0 : static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3692 : struct netlink_ext_ack *extack)
3693 : {
3694 0 : return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack);
3695 : }
3696 :
3697 0 : static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh,
3698 : struct netlink_ext_ack *extack)
3699 : {
3700 0 : return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack);
3701 : }
3702 :
3703 6 : static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
3704 : {
3705 6 : struct net *net = sock_net(skb->sk);
3706 6 : size_t min_ifinfo_dump_size = 0;
3707 6 : struct nlattr *tb[IFLA_MAX+1];
3708 6 : u32 ext_filter_mask = 0;
3709 6 : struct net_device *dev;
3710 6 : int hdrlen;
3711 :
3712 : /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */
3713 6 : hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
3714 : sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
3715 :
3716 6 : if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
3717 6 : if (tb[IFLA_EXT_MASK])
3718 0 : ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
3719 : }
3720 :
3721 0 : if (!ext_filter_mask)
3722 : return NLMSG_GOODSIZE;
3723 : /*
3724 : * traverse the list of net devices and compute the minimum
3725 : * buffer size based upon the filter mask.
3726 : */
3727 0 : rcu_read_lock();
3728 0 : for_each_netdev_rcu(net, dev) {
3729 0 : min_ifinfo_dump_size = max(min_ifinfo_dump_size,
3730 : if_nlmsg_size(dev, ext_filter_mask));
3731 : }
3732 0 : rcu_read_unlock();
3733 :
3734 0 : return nlmsg_total_size(min_ifinfo_dump_size);
3735 : }
3736 :
3737 52 : static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
3738 : {
3739 52 : int idx;
3740 52 : int s_idx = cb->family;
3741 52 : int type = cb->nlh->nlmsg_type - RTM_BASE;
3742 52 : int ret = 0;
3743 :
3744 52 : if (s_idx == 0)
3745 26 : s_idx = 1;
3746 :
3747 3432 : for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) {
3748 3406 : struct rtnl_link __rcu **tab;
3749 3406 : struct rtnl_link *link;
3750 3406 : rtnl_dumpit_func dumpit;
3751 :
3752 3406 : if (idx < s_idx || idx == PF_PACKET)
3753 52 : continue;
3754 :
3755 3354 : if (type < 0 || type >= RTM_NR_MSGTYPES)
3756 0 : continue;
3757 :
3758 6708 : tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]);
3759 3354 : if (!tab)
3760 3250 : continue;
3761 :
3762 208 : link = rcu_dereference_rtnl(tab[type]);
3763 104 : if (!link)
3764 52 : continue;
3765 :
3766 52 : dumpit = link->dumpit;
3767 52 : if (!dumpit)
3768 0 : continue;
3769 :
3770 52 : if (idx > s_idx) {
3771 26 : memset(&cb->args[0], 0, sizeof(cb->args));
3772 26 : cb->prev_seq = 0;
3773 26 : cb->seq = 0;
3774 : }
3775 52 : ret = dumpit(skb, cb);
3776 52 : if (ret)
3777 : break;
3778 : }
3779 52 : cb->family = idx;
3780 :
3781 52 : return skb->len ? : ret;
3782 : }
3783 :
3784 4 : struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
3785 : unsigned int change,
3786 : u32 event, gfp_t flags, int *new_nsid,
3787 : int new_ifindex)
3788 : {
3789 4 : struct net *net = dev_net(dev);
3790 4 : struct sk_buff *skb;
3791 4 : int err = -ENOBUFS;
3792 4 : size_t if_info_size;
3793 :
3794 4 : skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags);
3795 4 : if (skb == NULL)
3796 0 : goto errout;
3797 :
3798 4 : err = rtnl_fill_ifinfo(skb, dev, dev_net(dev),
3799 : type, 0, 0, change, 0, 0, event,
3800 : new_nsid, new_ifindex, -1, flags);
3801 4 : if (err < 0) {
3802 : /* -EMSGSIZE implies BUG in if_nlmsg_size() */
3803 0 : WARN_ON(err == -EMSGSIZE);
3804 0 : kfree_skb(skb);
3805 0 : goto errout;
3806 : }
3807 : return skb;
3808 0 : errout:
3809 0 : if (err < 0)
3810 0 : rtnl_set_sk_err(net, RTNLGRP_LINK, err);
3811 0 : return NULL;
3812 : }
3813 :
3814 4 : void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
3815 : {
3816 4 : struct net *net = dev_net(dev);
3817 :
3818 4 : rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
3819 4 : }
3820 :
3821 4 : static void rtmsg_ifinfo_event(int type, struct net_device *dev,
3822 : unsigned int change, u32 event,
3823 : gfp_t flags, int *new_nsid, int new_ifindex)
3824 : {
3825 4 : struct sk_buff *skb;
3826 :
3827 4 : if (dev->reg_state != NETREG_REGISTERED)
3828 : return;
3829 :
3830 4 : skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid,
3831 : new_ifindex);
3832 4 : if (skb)
3833 4 : rtmsg_ifinfo_send(skb, dev, flags);
3834 : }
3835 :
3836 4 : void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
3837 : gfp_t flags)
3838 : {
3839 4 : rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3840 : NULL, 0);
3841 4 : }
3842 :
3843 0 : void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change,
3844 : gfp_t flags, int *new_nsid, int new_ifindex)
3845 : {
3846 0 : rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags,
3847 : new_nsid, new_ifindex);
3848 0 : }
3849 :
3850 0 : static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
3851 : struct net_device *dev,
3852 : u8 *addr, u16 vid, u32 pid, u32 seq,
3853 : int type, unsigned int flags,
3854 : int nlflags, u16 ndm_state)
3855 : {
3856 0 : struct nlmsghdr *nlh;
3857 0 : struct ndmsg *ndm;
3858 :
3859 0 : nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags);
3860 0 : if (!nlh)
3861 : return -EMSGSIZE;
3862 :
3863 0 : ndm = nlmsg_data(nlh);
3864 0 : ndm->ndm_family = AF_BRIDGE;
3865 0 : ndm->ndm_pad1 = 0;
3866 0 : ndm->ndm_pad2 = 0;
3867 0 : ndm->ndm_flags = flags;
3868 0 : ndm->ndm_type = 0;
3869 0 : ndm->ndm_ifindex = dev->ifindex;
3870 0 : ndm->ndm_state = ndm_state;
3871 :
3872 0 : if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
3873 0 : goto nla_put_failure;
3874 0 : if (vid)
3875 0 : if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid))
3876 0 : goto nla_put_failure;
3877 :
3878 0 : nlmsg_end(skb, nlh);
3879 0 : return 0;
3880 :
3881 0 : nla_put_failure:
3882 0 : nlmsg_cancel(skb, nlh);
3883 0 : return -EMSGSIZE;
3884 : }
3885 :
3886 0 : static inline size_t rtnl_fdb_nlmsg_size(void)
3887 : {
3888 0 : return NLMSG_ALIGN(sizeof(struct ndmsg)) +
3889 0 : nla_total_size(ETH_ALEN) + /* NDA_LLADDR */
3890 0 : nla_total_size(sizeof(u16)) + /* NDA_VLAN */
3891 : 0;
3892 : }
3893 :
3894 0 : static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type,
3895 : u16 ndm_state)
3896 : {
3897 0 : struct net *net = dev_net(dev);
3898 0 : struct sk_buff *skb;
3899 0 : int err = -ENOBUFS;
3900 :
3901 0 : skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC);
3902 0 : if (!skb)
3903 0 : goto errout;
3904 :
3905 0 : err = nlmsg_populate_fdb_fill(skb, dev, addr, vid,
3906 : 0, 0, type, NTF_SELF, 0, ndm_state);
3907 0 : if (err < 0) {
3908 0 : kfree_skb(skb);
3909 0 : goto errout;
3910 : }
3911 :
3912 0 : rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
3913 : return;
3914 0 : errout:
3915 0 : rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
3916 : }
3917 :
3918 : /*
3919 : * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry
3920 : */
3921 0 : int ndo_dflt_fdb_add(struct ndmsg *ndm,
3922 : struct nlattr *tb[],
3923 : struct net_device *dev,
3924 : const unsigned char *addr, u16 vid,
3925 : u16 flags)
3926 : {
3927 0 : int err = -EINVAL;
3928 :
3929 : /* If aging addresses are supported device will need to
3930 : * implement its own handler for this.
3931 : */
3932 0 : if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
3933 0 : pr_info("%s: FDB only supports static addresses\n", dev->name);
3934 0 : return err;
3935 : }
3936 :
3937 0 : if (vid) {
3938 0 : pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
3939 0 : return err;
3940 : }
3941 :
3942 0 : if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
3943 0 : err = dev_uc_add_excl(dev, addr);
3944 0 : else if (is_multicast_ether_addr(addr))
3945 0 : err = dev_mc_add_excl(dev, addr);
3946 :
3947 : /* Only return duplicate errors if NLM_F_EXCL is set */
3948 0 : if (err == -EEXIST && !(flags & NLM_F_EXCL))
3949 0 : err = 0;
3950 :
3951 : return err;
3952 : }
3953 : EXPORT_SYMBOL(ndo_dflt_fdb_add);
3954 :
3955 0 : static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid,
3956 : struct netlink_ext_ack *extack)
3957 : {
3958 0 : u16 vid = 0;
3959 :
3960 0 : if (vlan_attr) {
3961 0 : if (nla_len(vlan_attr) != sizeof(u16)) {
3962 0 : NL_SET_ERR_MSG(extack, "invalid vlan attribute size");
3963 0 : return -EINVAL;
3964 : }
3965 :
3966 0 : vid = nla_get_u16(vlan_attr);
3967 :
3968 0 : if (!vid || vid >= VLAN_VID_MASK) {
3969 0 : NL_SET_ERR_MSG(extack, "invalid vlan id");
3970 0 : return -EINVAL;
3971 : }
3972 : }
3973 0 : *p_vid = vid;
3974 0 : return 0;
3975 : }
3976 :
3977 0 : static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
3978 : struct netlink_ext_ack *extack)
3979 : {
3980 0 : struct net *net = sock_net(skb->sk);
3981 0 : struct ndmsg *ndm;
3982 0 : struct nlattr *tb[NDA_MAX+1];
3983 0 : struct net_device *dev;
3984 0 : u8 *addr;
3985 0 : u16 vid;
3986 0 : int err;
3987 :
3988 0 : err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
3989 : extack);
3990 0 : if (err < 0)
3991 : return err;
3992 :
3993 0 : ndm = nlmsg_data(nlh);
3994 0 : if (ndm->ndm_ifindex == 0) {
3995 0 : NL_SET_ERR_MSG(extack, "invalid ifindex");
3996 0 : return -EINVAL;
3997 : }
3998 :
3999 0 : dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4000 0 : if (dev == NULL) {
4001 0 : NL_SET_ERR_MSG(extack, "unknown ifindex");
4002 0 : return -ENODEV;
4003 : }
4004 :
4005 0 : if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4006 0 : NL_SET_ERR_MSG(extack, "invalid address");
4007 0 : return -EINVAL;
4008 : }
4009 :
4010 0 : if (dev->type != ARPHRD_ETHER) {
4011 0 : NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices");
4012 0 : return -EINVAL;
4013 : }
4014 :
4015 0 : addr = nla_data(tb[NDA_LLADDR]);
4016 :
4017 0 : err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4018 0 : if (err)
4019 : return err;
4020 :
4021 0 : err = -EOPNOTSUPP;
4022 :
4023 : /* Support fdb on master device the net/bridge default case */
4024 0 : if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4025 0 : netif_is_bridge_port(dev)) {
4026 0 : struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4027 0 : const struct net_device_ops *ops = br_dev->netdev_ops;
4028 :
4029 0 : err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid,
4030 0 : nlh->nlmsg_flags, extack);
4031 0 : if (err)
4032 0 : goto out;
4033 : else
4034 0 : ndm->ndm_flags &= ~NTF_MASTER;
4035 : }
4036 :
4037 : /* Embedded bridge, macvlan, and any other device support */
4038 0 : if ((ndm->ndm_flags & NTF_SELF)) {
4039 0 : if (dev->netdev_ops->ndo_fdb_add)
4040 0 : err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr,
4041 : vid,
4042 0 : nlh->nlmsg_flags,
4043 : extack);
4044 : else
4045 0 : err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid,
4046 0 : nlh->nlmsg_flags);
4047 :
4048 0 : if (!err) {
4049 0 : rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH,
4050 0 : ndm->ndm_state);
4051 0 : ndm->ndm_flags &= ~NTF_SELF;
4052 : }
4053 : }
4054 0 : out:
4055 : return err;
4056 : }
4057 :
4058 : /*
4059 : * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry
4060 : */
4061 0 : int ndo_dflt_fdb_del(struct ndmsg *ndm,
4062 : struct nlattr *tb[],
4063 : struct net_device *dev,
4064 : const unsigned char *addr, u16 vid)
4065 : {
4066 0 : int err = -EINVAL;
4067 :
4068 : /* If aging addresses are supported device will need to
4069 : * implement its own handler for this.
4070 : */
4071 0 : if (!(ndm->ndm_state & NUD_PERMANENT)) {
4072 0 : pr_info("%s: FDB only supports static addresses\n", dev->name);
4073 0 : return err;
4074 : }
4075 :
4076 0 : if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
4077 0 : err = dev_uc_del(dev, addr);
4078 0 : else if (is_multicast_ether_addr(addr))
4079 0 : err = dev_mc_del(dev, addr);
4080 :
4081 : return err;
4082 : }
4083 : EXPORT_SYMBOL(ndo_dflt_fdb_del);
4084 :
4085 0 : static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
4086 : struct netlink_ext_ack *extack)
4087 : {
4088 0 : struct net *net = sock_net(skb->sk);
4089 0 : struct ndmsg *ndm;
4090 0 : struct nlattr *tb[NDA_MAX+1];
4091 0 : struct net_device *dev;
4092 0 : __u8 *addr;
4093 0 : int err;
4094 0 : u16 vid;
4095 :
4096 0 : if (!netlink_capable(skb, CAP_NET_ADMIN))
4097 : return -EPERM;
4098 :
4099 0 : err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL,
4100 : extack);
4101 0 : if (err < 0)
4102 : return err;
4103 :
4104 0 : ndm = nlmsg_data(nlh);
4105 0 : if (ndm->ndm_ifindex == 0) {
4106 0 : NL_SET_ERR_MSG(extack, "invalid ifindex");
4107 0 : return -EINVAL;
4108 : }
4109 :
4110 0 : dev = __dev_get_by_index(net, ndm->ndm_ifindex);
4111 0 : if (dev == NULL) {
4112 0 : NL_SET_ERR_MSG(extack, "unknown ifindex");
4113 0 : return -ENODEV;
4114 : }
4115 :
4116 0 : if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) {
4117 0 : NL_SET_ERR_MSG(extack, "invalid address");
4118 0 : return -EINVAL;
4119 : }
4120 :
4121 0 : if (dev->type != ARPHRD_ETHER) {
4122 0 : NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices");
4123 0 : return -EINVAL;
4124 : }
4125 :
4126 0 : addr = nla_data(tb[NDA_LLADDR]);
4127 :
4128 0 : err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack);
4129 0 : if (err)
4130 : return err;
4131 :
4132 0 : err = -EOPNOTSUPP;
4133 :
4134 : /* Support fdb on master device the net/bridge default case */
4135 0 : if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) &&
4136 0 : netif_is_bridge_port(dev)) {
4137 0 : struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4138 0 : const struct net_device_ops *ops = br_dev->netdev_ops;
4139 :
4140 0 : if (ops->ndo_fdb_del)
4141 0 : err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid);
4142 :
4143 0 : if (err)
4144 0 : goto out;
4145 : else
4146 0 : ndm->ndm_flags &= ~NTF_MASTER;
4147 : }
4148 :
4149 : /* Embedded bridge, macvlan, and any other device support */
4150 0 : if (ndm->ndm_flags & NTF_SELF) {
4151 0 : if (dev->netdev_ops->ndo_fdb_del)
4152 0 : err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr,
4153 : vid);
4154 : else
4155 0 : err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid);
4156 :
4157 0 : if (!err) {
4158 0 : rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH,
4159 0 : ndm->ndm_state);
4160 0 : ndm->ndm_flags &= ~NTF_SELF;
4161 : }
4162 : }
4163 0 : out:
4164 : return err;
4165 : }
4166 :
4167 0 : static int nlmsg_populate_fdb(struct sk_buff *skb,
4168 : struct netlink_callback *cb,
4169 : struct net_device *dev,
4170 : int *idx,
4171 : struct netdev_hw_addr_list *list)
4172 : {
4173 0 : struct netdev_hw_addr *ha;
4174 0 : int err;
4175 0 : u32 portid, seq;
4176 :
4177 0 : portid = NETLINK_CB(cb->skb).portid;
4178 0 : seq = cb->nlh->nlmsg_seq;
4179 :
4180 0 : list_for_each_entry(ha, &list->list, list) {
4181 0 : if (*idx < cb->args[2])
4182 0 : goto skip;
4183 :
4184 0 : err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0,
4185 : portid, seq,
4186 : RTM_NEWNEIGH, NTF_SELF,
4187 : NLM_F_MULTI, NUD_PERMANENT);
4188 0 : if (err < 0)
4189 0 : return err;
4190 0 : skip:
4191 0 : *idx += 1;
4192 : }
4193 : return 0;
4194 : }
4195 :
4196 : /**
4197 : * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table.
4198 : * @skb: socket buffer to store message in
4199 : * @cb: netlink callback
4200 : * @dev: netdevice
4201 : * @filter_dev: ignored
4202 : * @idx: the number of FDB table entries dumped is added to *@idx
4203 : *
4204 : * Default netdevice operation to dump the existing unicast address list.
4205 : * Returns number of addresses from list put in skb.
4206 : */
4207 0 : int ndo_dflt_fdb_dump(struct sk_buff *skb,
4208 : struct netlink_callback *cb,
4209 : struct net_device *dev,
4210 : struct net_device *filter_dev,
4211 : int *idx)
4212 : {
4213 0 : int err;
4214 :
4215 0 : if (dev->type != ARPHRD_ETHER)
4216 : return -EINVAL;
4217 :
4218 0 : netif_addr_lock_bh(dev);
4219 0 : err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc);
4220 0 : if (err)
4221 0 : goto out;
4222 0 : err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc);
4223 0 : out:
4224 0 : netif_addr_unlock_bh(dev);
4225 0 : return err;
4226 : }
4227 : EXPORT_SYMBOL(ndo_dflt_fdb_dump);
4228 :
4229 0 : static int valid_fdb_dump_strict(const struct nlmsghdr *nlh,
4230 : int *br_idx, int *brport_idx,
4231 : struct netlink_ext_ack *extack)
4232 : {
4233 0 : struct nlattr *tb[NDA_MAX + 1];
4234 0 : struct ndmsg *ndm;
4235 0 : int err, i;
4236 :
4237 0 : if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4238 0 : NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request");
4239 0 : return -EINVAL;
4240 : }
4241 :
4242 0 : ndm = nlmsg_data(nlh);
4243 0 : if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4244 0 : ndm->ndm_flags || ndm->ndm_type) {
4245 0 : NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request");
4246 0 : return -EINVAL;
4247 : }
4248 :
4249 0 : err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4250 : NDA_MAX, NULL, extack);
4251 0 : if (err < 0)
4252 : return err;
4253 :
4254 0 : *brport_idx = ndm->ndm_ifindex;
4255 0 : for (i = 0; i <= NDA_MAX; ++i) {
4256 0 : if (!tb[i])
4257 0 : continue;
4258 :
4259 0 : switch (i) {
4260 0 : case NDA_IFINDEX:
4261 0 : if (nla_len(tb[i]) != sizeof(u32)) {
4262 0 : NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request");
4263 0 : return -EINVAL;
4264 : }
4265 0 : *brport_idx = nla_get_u32(tb[NDA_IFINDEX]);
4266 0 : break;
4267 0 : case NDA_MASTER:
4268 0 : if (nla_len(tb[i]) != sizeof(u32)) {
4269 0 : NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request");
4270 0 : return -EINVAL;
4271 : }
4272 0 : *br_idx = nla_get_u32(tb[NDA_MASTER]);
4273 0 : break;
4274 0 : default:
4275 0 : NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request");
4276 : return -EINVAL;
4277 : }
4278 : }
4279 :
4280 : return 0;
4281 : }
4282 :
4283 0 : static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh,
4284 : int *br_idx, int *brport_idx,
4285 : struct netlink_ext_ack *extack)
4286 : {
4287 0 : struct nlattr *tb[IFLA_MAX+1];
4288 0 : int err;
4289 :
4290 : /* A hack to preserve kernel<->userspace interface.
4291 : * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0.
4292 : * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails.
4293 : * So, check for ndmsg with an optional u32 attribute (not used here).
4294 : * Fortunately these sizes don't conflict with the size of ifinfomsg
4295 : * with an optional attribute.
4296 : */
4297 0 : if (nlmsg_len(nlh) != sizeof(struct ndmsg) &&
4298 0 : (nlmsg_len(nlh) != sizeof(struct ndmsg) +
4299 0 : nla_attr_size(sizeof(u32)))) {
4300 0 : struct ifinfomsg *ifm;
4301 :
4302 0 : err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4303 : tb, IFLA_MAX, ifla_policy,
4304 : extack);
4305 0 : if (err < 0) {
4306 : return -EINVAL;
4307 0 : } else if (err == 0) {
4308 0 : if (tb[IFLA_MASTER])
4309 0 : *br_idx = nla_get_u32(tb[IFLA_MASTER]);
4310 : }
4311 :
4312 0 : ifm = nlmsg_data(nlh);
4313 0 : *brport_idx = ifm->ifi_index;
4314 : }
4315 : return 0;
4316 : }
4317 :
4318 0 : static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
4319 : {
4320 0 : struct net_device *dev;
4321 0 : struct net_device *br_dev = NULL;
4322 0 : const struct net_device_ops *ops = NULL;
4323 0 : const struct net_device_ops *cops = NULL;
4324 0 : struct net *net = sock_net(skb->sk);
4325 0 : struct hlist_head *head;
4326 0 : int brport_idx = 0;
4327 0 : int br_idx = 0;
4328 0 : int h, s_h;
4329 0 : int idx = 0, s_idx;
4330 0 : int err = 0;
4331 0 : int fidx = 0;
4332 :
4333 0 : if (cb->strict_check)
4334 0 : err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx,
4335 : cb->extack);
4336 : else
4337 0 : err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx,
4338 : cb->extack);
4339 0 : if (err < 0)
4340 : return err;
4341 :
4342 0 : if (br_idx) {
4343 0 : br_dev = __dev_get_by_index(net, br_idx);
4344 0 : if (!br_dev)
4345 : return -ENODEV;
4346 :
4347 0 : ops = br_dev->netdev_ops;
4348 : }
4349 :
4350 0 : s_h = cb->args[0];
4351 0 : s_idx = cb->args[1];
4352 :
4353 0 : for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4354 0 : idx = 0;
4355 0 : head = &net->dev_index_head[h];
4356 0 : hlist_for_each_entry(dev, head, index_hlist) {
4357 :
4358 0 : if (brport_idx && (dev->ifindex != brport_idx))
4359 0 : continue;
4360 :
4361 0 : if (!br_idx) { /* user did not specify a specific bridge */
4362 0 : if (netif_is_bridge_port(dev)) {
4363 0 : br_dev = netdev_master_upper_dev_get(dev);
4364 0 : cops = br_dev->netdev_ops;
4365 : }
4366 : } else {
4367 0 : if (dev != br_dev &&
4368 0 : !netif_is_bridge_port(dev))
4369 0 : continue;
4370 :
4371 0 : if (br_dev != netdev_master_upper_dev_get(dev) &&
4372 0 : !(dev->priv_flags & IFF_EBRIDGE))
4373 0 : continue;
4374 : cops = ops;
4375 : }
4376 :
4377 0 : if (idx < s_idx)
4378 0 : goto cont;
4379 :
4380 0 : if (netif_is_bridge_port(dev)) {
4381 0 : if (cops && cops->ndo_fdb_dump) {
4382 0 : err = cops->ndo_fdb_dump(skb, cb,
4383 : br_dev, dev,
4384 : &fidx);
4385 0 : if (err == -EMSGSIZE)
4386 0 : goto out;
4387 : }
4388 : }
4389 :
4390 0 : if (dev->netdev_ops->ndo_fdb_dump)
4391 0 : err = dev->netdev_ops->ndo_fdb_dump(skb, cb,
4392 : dev, NULL,
4393 : &fidx);
4394 : else
4395 0 : err = ndo_dflt_fdb_dump(skb, cb, dev, NULL,
4396 : &fidx);
4397 0 : if (err == -EMSGSIZE)
4398 0 : goto out;
4399 :
4400 0 : cops = NULL;
4401 :
4402 : /* reset fdb offset to 0 for rest of the interfaces */
4403 0 : cb->args[2] = 0;
4404 0 : fidx = 0;
4405 0 : cont:
4406 0 : idx++;
4407 : }
4408 : }
4409 :
4410 0 : out:
4411 0 : cb->args[0] = h;
4412 0 : cb->args[1] = idx;
4413 0 : cb->args[2] = fidx;
4414 :
4415 0 : return skb->len;
4416 : }
4417 :
4418 0 : static int valid_fdb_get_strict(const struct nlmsghdr *nlh,
4419 : struct nlattr **tb, u8 *ndm_flags,
4420 : int *br_idx, int *brport_idx, u8 **addr,
4421 : u16 *vid, struct netlink_ext_ack *extack)
4422 : {
4423 0 : struct ndmsg *ndm;
4424 0 : int err, i;
4425 :
4426 0 : if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) {
4427 0 : NL_SET_ERR_MSG(extack, "Invalid header for fdb get request");
4428 0 : return -EINVAL;
4429 : }
4430 :
4431 0 : ndm = nlmsg_data(nlh);
4432 0 : if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state ||
4433 : ndm->ndm_type) {
4434 0 : NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request");
4435 0 : return -EINVAL;
4436 : }
4437 :
4438 0 : if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) {
4439 0 : NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request");
4440 0 : return -EINVAL;
4441 : }
4442 :
4443 0 : err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb,
4444 : NDA_MAX, nda_policy, extack);
4445 0 : if (err < 0)
4446 : return err;
4447 :
4448 0 : *ndm_flags = ndm->ndm_flags;
4449 0 : *brport_idx = ndm->ndm_ifindex;
4450 0 : for (i = 0; i <= NDA_MAX; ++i) {
4451 0 : if (!tb[i])
4452 0 : continue;
4453 :
4454 0 : switch (i) {
4455 0 : case NDA_MASTER:
4456 0 : *br_idx = nla_get_u32(tb[i]);
4457 0 : break;
4458 0 : case NDA_LLADDR:
4459 0 : if (nla_len(tb[i]) != ETH_ALEN) {
4460 0 : NL_SET_ERR_MSG(extack, "Invalid address in fdb get request");
4461 0 : return -EINVAL;
4462 : }
4463 0 : *addr = nla_data(tb[i]);
4464 0 : break;
4465 0 : case NDA_VLAN:
4466 0 : err = fdb_vid_parse(tb[i], vid, extack);
4467 0 : if (err)
4468 0 : return err;
4469 : break;
4470 : case NDA_VNI:
4471 : break;
4472 0 : default:
4473 0 : NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request");
4474 : return -EINVAL;
4475 : }
4476 : }
4477 :
4478 : return 0;
4479 : }
4480 :
4481 0 : static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh,
4482 : struct netlink_ext_ack *extack)
4483 : {
4484 0 : struct net_device *dev = NULL, *br_dev = NULL;
4485 0 : const struct net_device_ops *ops = NULL;
4486 0 : struct net *net = sock_net(in_skb->sk);
4487 0 : struct nlattr *tb[NDA_MAX + 1];
4488 0 : struct sk_buff *skb;
4489 0 : int brport_idx = 0;
4490 0 : u8 ndm_flags = 0;
4491 0 : int br_idx = 0;
4492 0 : u8 *addr = NULL;
4493 0 : u16 vid = 0;
4494 0 : int err;
4495 :
4496 0 : err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx,
4497 : &brport_idx, &addr, &vid, extack);
4498 0 : if (err < 0)
4499 : return err;
4500 :
4501 0 : if (!addr) {
4502 0 : NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request");
4503 0 : return -EINVAL;
4504 : }
4505 :
4506 0 : if (brport_idx) {
4507 0 : dev = __dev_get_by_index(net, brport_idx);
4508 0 : if (!dev) {
4509 0 : NL_SET_ERR_MSG(extack, "Unknown device ifindex");
4510 0 : return -ENODEV;
4511 : }
4512 : }
4513 :
4514 0 : if (br_idx) {
4515 0 : if (dev) {
4516 0 : NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive");
4517 0 : return -EINVAL;
4518 : }
4519 :
4520 0 : br_dev = __dev_get_by_index(net, br_idx);
4521 0 : if (!br_dev) {
4522 0 : NL_SET_ERR_MSG(extack, "Invalid master ifindex");
4523 0 : return -EINVAL;
4524 : }
4525 0 : ops = br_dev->netdev_ops;
4526 : }
4527 :
4528 0 : if (dev) {
4529 0 : if (!ndm_flags || (ndm_flags & NTF_MASTER)) {
4530 0 : if (!netif_is_bridge_port(dev)) {
4531 0 : NL_SET_ERR_MSG(extack, "Device is not a bridge port");
4532 0 : return -EINVAL;
4533 : }
4534 0 : br_dev = netdev_master_upper_dev_get(dev);
4535 0 : if (!br_dev) {
4536 0 : NL_SET_ERR_MSG(extack, "Master of device not found");
4537 0 : return -EINVAL;
4538 : }
4539 0 : ops = br_dev->netdev_ops;
4540 : } else {
4541 0 : if (!(ndm_flags & NTF_SELF)) {
4542 0 : NL_SET_ERR_MSG(extack, "Missing NTF_SELF");
4543 0 : return -EINVAL;
4544 : }
4545 0 : ops = dev->netdev_ops;
4546 : }
4547 : }
4548 :
4549 0 : if (!br_dev && !dev) {
4550 0 : NL_SET_ERR_MSG(extack, "No device specified");
4551 0 : return -ENODEV;
4552 : }
4553 :
4554 0 : if (!ops || !ops->ndo_fdb_get) {
4555 0 : NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device");
4556 0 : return -EOPNOTSUPP;
4557 : }
4558 :
4559 0 : skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4560 0 : if (!skb)
4561 : return -ENOBUFS;
4562 :
4563 0 : if (br_dev)
4564 0 : dev = br_dev;
4565 0 : err = ops->ndo_fdb_get(skb, tb, dev, addr, vid,
4566 : NETLINK_CB(in_skb).portid,
4567 : nlh->nlmsg_seq, extack);
4568 0 : if (err)
4569 0 : goto out;
4570 :
4571 0 : return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4572 0 : out:
4573 0 : kfree_skb(skb);
4574 0 : return err;
4575 : }
4576 :
4577 0 : static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask,
4578 : unsigned int attrnum, unsigned int flag)
4579 : {
4580 0 : if (mask & flag)
4581 0 : return nla_put_u8(skb, attrnum, !!(flags & flag));
4582 : return 0;
4583 : }
4584 :
4585 0 : int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
4586 : struct net_device *dev, u16 mode,
4587 : u32 flags, u32 mask, int nlflags,
4588 : u32 filter_mask,
4589 : int (*vlan_fill)(struct sk_buff *skb,
4590 : struct net_device *dev,
4591 : u32 filter_mask))
4592 : {
4593 0 : struct nlmsghdr *nlh;
4594 0 : struct ifinfomsg *ifm;
4595 0 : struct nlattr *br_afspec;
4596 0 : struct nlattr *protinfo;
4597 0 : u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
4598 0 : struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4599 0 : int err = 0;
4600 :
4601 0 : nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags);
4602 0 : if (nlh == NULL)
4603 : return -EMSGSIZE;
4604 :
4605 0 : ifm = nlmsg_data(nlh);
4606 0 : ifm->ifi_family = AF_BRIDGE;
4607 0 : ifm->__ifi_pad = 0;
4608 0 : ifm->ifi_type = dev->type;
4609 0 : ifm->ifi_index = dev->ifindex;
4610 0 : ifm->ifi_flags = dev_get_flags(dev);
4611 0 : ifm->ifi_change = 0;
4612 :
4613 :
4614 0 : if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4615 0 : nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4616 0 : nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
4617 0 : (br_dev &&
4618 0 : nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) ||
4619 0 : (dev->addr_len &&
4620 0 : nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4621 0 : (dev->ifindex != dev_get_iflink(dev) &&
4622 0 : nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
4623 0 : goto nla_put_failure;
4624 :
4625 0 : br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
4626 0 : if (!br_afspec)
4627 0 : goto nla_put_failure;
4628 :
4629 0 : if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) {
4630 0 : nla_nest_cancel(skb, br_afspec);
4631 0 : goto nla_put_failure;
4632 : }
4633 :
4634 0 : if (mode != BRIDGE_MODE_UNDEF) {
4635 0 : if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) {
4636 0 : nla_nest_cancel(skb, br_afspec);
4637 0 : goto nla_put_failure;
4638 : }
4639 : }
4640 0 : if (vlan_fill) {
4641 0 : err = vlan_fill(skb, dev, filter_mask);
4642 0 : if (err) {
4643 0 : nla_nest_cancel(skb, br_afspec);
4644 0 : goto nla_put_failure;
4645 : }
4646 : }
4647 0 : nla_nest_end(skb, br_afspec);
4648 :
4649 0 : protinfo = nla_nest_start(skb, IFLA_PROTINFO);
4650 0 : if (!protinfo)
4651 0 : goto nla_put_failure;
4652 :
4653 0 : if (brport_nla_put_flag(skb, flags, mask,
4654 0 : IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) ||
4655 0 : brport_nla_put_flag(skb, flags, mask,
4656 0 : IFLA_BRPORT_GUARD, BR_BPDU_GUARD) ||
4657 0 : brport_nla_put_flag(skb, flags, mask,
4658 : IFLA_BRPORT_FAST_LEAVE,
4659 0 : BR_MULTICAST_FAST_LEAVE) ||
4660 0 : brport_nla_put_flag(skb, flags, mask,
4661 0 : IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) ||
4662 0 : brport_nla_put_flag(skb, flags, mask,
4663 0 : IFLA_BRPORT_LEARNING, BR_LEARNING) ||
4664 0 : brport_nla_put_flag(skb, flags, mask,
4665 0 : IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) ||
4666 0 : brport_nla_put_flag(skb, flags, mask,
4667 0 : IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) ||
4668 0 : brport_nla_put_flag(skb, flags, mask,
4669 0 : IFLA_BRPORT_PROXYARP, BR_PROXYARP) ||
4670 0 : brport_nla_put_flag(skb, flags, mask,
4671 0 : IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) ||
4672 0 : brport_nla_put_flag(skb, flags, mask,
4673 : IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) {
4674 0 : nla_nest_cancel(skb, protinfo);
4675 0 : goto nla_put_failure;
4676 : }
4677 :
4678 0 : nla_nest_end(skb, protinfo);
4679 :
4680 0 : nlmsg_end(skb, nlh);
4681 0 : return 0;
4682 0 : nla_put_failure:
4683 0 : nlmsg_cancel(skb, nlh);
4684 0 : return err ? err : -EMSGSIZE;
4685 : }
4686 : EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink);
4687 :
4688 0 : static int valid_bridge_getlink_req(const struct nlmsghdr *nlh,
4689 : bool strict_check, u32 *filter_mask,
4690 : struct netlink_ext_ack *extack)
4691 : {
4692 0 : struct nlattr *tb[IFLA_MAX+1];
4693 0 : int err, i;
4694 :
4695 0 : if (strict_check) {
4696 0 : struct ifinfomsg *ifm;
4697 :
4698 0 : if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) {
4699 0 : NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump");
4700 0 : return -EINVAL;
4701 : }
4702 :
4703 0 : ifm = nlmsg_data(nlh);
4704 0 : if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags ||
4705 0 : ifm->ifi_change || ifm->ifi_index) {
4706 0 : NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request");
4707 0 : return -EINVAL;
4708 : }
4709 :
4710 0 : err = nlmsg_parse_deprecated_strict(nlh,
4711 : sizeof(struct ifinfomsg),
4712 : tb, IFLA_MAX, ifla_policy,
4713 : extack);
4714 : } else {
4715 0 : err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg),
4716 : tb, IFLA_MAX, ifla_policy,
4717 : extack);
4718 : }
4719 0 : if (err < 0)
4720 : return err;
4721 :
4722 : /* new attributes should only be added with strict checking */
4723 0 : for (i = 0; i <= IFLA_MAX; ++i) {
4724 0 : if (!tb[i])
4725 0 : continue;
4726 :
4727 0 : switch (i) {
4728 0 : case IFLA_EXT_MASK:
4729 0 : *filter_mask = nla_get_u32(tb[i]);
4730 0 : break;
4731 0 : default:
4732 0 : if (strict_check) {
4733 0 : NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request");
4734 0 : return -EINVAL;
4735 : }
4736 : }
4737 : }
4738 :
4739 : return 0;
4740 : }
4741 :
4742 0 : static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
4743 : {
4744 0 : const struct nlmsghdr *nlh = cb->nlh;
4745 0 : struct net *net = sock_net(skb->sk);
4746 0 : struct net_device *dev;
4747 0 : int idx = 0;
4748 0 : u32 portid = NETLINK_CB(cb->skb).portid;
4749 0 : u32 seq = nlh->nlmsg_seq;
4750 0 : u32 filter_mask = 0;
4751 0 : int err;
4752 :
4753 0 : err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask,
4754 : cb->extack);
4755 0 : if (err < 0 && cb->strict_check)
4756 : return err;
4757 :
4758 0 : rcu_read_lock();
4759 0 : for_each_netdev_rcu(net, dev) {
4760 0 : const struct net_device_ops *ops = dev->netdev_ops;
4761 0 : struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4762 :
4763 0 : if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) {
4764 0 : if (idx >= cb->args[0]) {
4765 0 : err = br_dev->netdev_ops->ndo_bridge_getlink(
4766 : skb, portid, seq, dev,
4767 : filter_mask, NLM_F_MULTI);
4768 0 : if (err < 0 && err != -EOPNOTSUPP) {
4769 0 : if (likely(skb->len))
4770 : break;
4771 :
4772 0 : goto out_err;
4773 : }
4774 : }
4775 0 : idx++;
4776 : }
4777 :
4778 0 : if (ops->ndo_bridge_getlink) {
4779 0 : if (idx >= cb->args[0]) {
4780 0 : err = ops->ndo_bridge_getlink(skb, portid,
4781 : seq, dev,
4782 : filter_mask,
4783 : NLM_F_MULTI);
4784 0 : if (err < 0 && err != -EOPNOTSUPP) {
4785 0 : if (likely(skb->len))
4786 : break;
4787 :
4788 0 : goto out_err;
4789 : }
4790 : }
4791 0 : idx++;
4792 : }
4793 : }
4794 0 : err = skb->len;
4795 0 : out_err:
4796 0 : rcu_read_unlock();
4797 0 : cb->args[0] = idx;
4798 :
4799 0 : return err;
4800 : }
4801 :
4802 0 : static inline size_t bridge_nlmsg_size(void)
4803 : {
4804 0 : return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4805 0 : + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4806 0 : + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4807 0 : + nla_total_size(sizeof(u32)) /* IFLA_MASTER */
4808 0 : + nla_total_size(sizeof(u32)) /* IFLA_MTU */
4809 0 : + nla_total_size(sizeof(u32)) /* IFLA_LINK */
4810 0 : + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */
4811 0 : + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */
4812 0 : + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */
4813 0 : + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */
4814 0 : + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */
4815 : }
4816 :
4817 0 : static int rtnl_bridge_notify(struct net_device *dev)
4818 : {
4819 0 : struct net *net = dev_net(dev);
4820 0 : struct sk_buff *skb;
4821 0 : int err = -EOPNOTSUPP;
4822 :
4823 0 : if (!dev->netdev_ops->ndo_bridge_getlink)
4824 : return 0;
4825 :
4826 0 : skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC);
4827 0 : if (!skb) {
4828 0 : err = -ENOMEM;
4829 0 : goto errout;
4830 : }
4831 :
4832 0 : err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0);
4833 0 : if (err < 0)
4834 0 : goto errout;
4835 :
4836 0 : if (!skb->len)
4837 0 : goto errout;
4838 :
4839 0 : rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
4840 0 : return 0;
4841 0 : errout:
4842 0 : WARN_ON(err == -EMSGSIZE);
4843 0 : kfree_skb(skb);
4844 0 : if (err)
4845 0 : rtnl_set_sk_err(net, RTNLGRP_LINK, err);
4846 : return err;
4847 : }
4848 :
4849 0 : static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
4850 : struct netlink_ext_ack *extack)
4851 : {
4852 0 : struct net *net = sock_net(skb->sk);
4853 0 : struct ifinfomsg *ifm;
4854 0 : struct net_device *dev;
4855 0 : struct nlattr *br_spec, *attr = NULL;
4856 0 : int rem, err = -EOPNOTSUPP;
4857 0 : u16 flags = 0;
4858 0 : bool have_flags = false;
4859 :
4860 0 : if (nlmsg_len(nlh) < sizeof(*ifm))
4861 : return -EINVAL;
4862 :
4863 0 : ifm = nlmsg_data(nlh);
4864 0 : if (ifm->ifi_family != AF_BRIDGE)
4865 : return -EPFNOSUPPORT;
4866 :
4867 0 : dev = __dev_get_by_index(net, ifm->ifi_index);
4868 0 : if (!dev) {
4869 0 : NL_SET_ERR_MSG(extack, "unknown ifindex");
4870 0 : return -ENODEV;
4871 : }
4872 :
4873 0 : br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4874 0 : if (br_spec) {
4875 0 : nla_for_each_nested(attr, br_spec, rem) {
4876 0 : if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4877 0 : if (nla_len(attr) < sizeof(flags))
4878 : return -EINVAL;
4879 :
4880 0 : have_flags = true;
4881 0 : flags = nla_get_u16(attr);
4882 0 : break;
4883 : }
4884 : }
4885 : }
4886 :
4887 0 : if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4888 0 : struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4889 :
4890 0 : if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) {
4891 0 : err = -EOPNOTSUPP;
4892 0 : goto out;
4893 : }
4894 :
4895 0 : err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags,
4896 : extack);
4897 0 : if (err)
4898 0 : goto out;
4899 :
4900 0 : flags &= ~BRIDGE_FLAGS_MASTER;
4901 : }
4902 :
4903 0 : if ((flags & BRIDGE_FLAGS_SELF)) {
4904 0 : if (!dev->netdev_ops->ndo_bridge_setlink)
4905 : err = -EOPNOTSUPP;
4906 : else
4907 0 : err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh,
4908 : flags,
4909 : extack);
4910 0 : if (!err) {
4911 0 : flags &= ~BRIDGE_FLAGS_SELF;
4912 :
4913 : /* Generate event to notify upper layer of bridge
4914 : * change
4915 : */
4916 0 : err = rtnl_bridge_notify(dev);
4917 : }
4918 : }
4919 :
4920 0 : if (have_flags)
4921 0 : memcpy(nla_data(attr), &flags, sizeof(flags));
4922 0 : out:
4923 : return err;
4924 : }
4925 :
4926 0 : static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
4927 : struct netlink_ext_ack *extack)
4928 : {
4929 0 : struct net *net = sock_net(skb->sk);
4930 0 : struct ifinfomsg *ifm;
4931 0 : struct net_device *dev;
4932 0 : struct nlattr *br_spec, *attr = NULL;
4933 0 : int rem, err = -EOPNOTSUPP;
4934 0 : u16 flags = 0;
4935 0 : bool have_flags = false;
4936 :
4937 0 : if (nlmsg_len(nlh) < sizeof(*ifm))
4938 : return -EINVAL;
4939 :
4940 0 : ifm = nlmsg_data(nlh);
4941 0 : if (ifm->ifi_family != AF_BRIDGE)
4942 : return -EPFNOSUPPORT;
4943 :
4944 0 : dev = __dev_get_by_index(net, ifm->ifi_index);
4945 0 : if (!dev) {
4946 0 : NL_SET_ERR_MSG(extack, "unknown ifindex");
4947 0 : return -ENODEV;
4948 : }
4949 :
4950 0 : br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
4951 0 : if (br_spec) {
4952 0 : nla_for_each_nested(attr, br_spec, rem) {
4953 0 : if (nla_type(attr) == IFLA_BRIDGE_FLAGS) {
4954 0 : if (nla_len(attr) < sizeof(flags))
4955 : return -EINVAL;
4956 :
4957 0 : have_flags = true;
4958 0 : flags = nla_get_u16(attr);
4959 0 : break;
4960 : }
4961 : }
4962 : }
4963 :
4964 0 : if (!flags || (flags & BRIDGE_FLAGS_MASTER)) {
4965 0 : struct net_device *br_dev = netdev_master_upper_dev_get(dev);
4966 :
4967 0 : if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) {
4968 0 : err = -EOPNOTSUPP;
4969 0 : goto out;
4970 : }
4971 :
4972 0 : err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags);
4973 0 : if (err)
4974 0 : goto out;
4975 :
4976 0 : flags &= ~BRIDGE_FLAGS_MASTER;
4977 : }
4978 :
4979 0 : if ((flags & BRIDGE_FLAGS_SELF)) {
4980 0 : if (!dev->netdev_ops->ndo_bridge_dellink)
4981 : err = -EOPNOTSUPP;
4982 : else
4983 0 : err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh,
4984 : flags);
4985 :
4986 0 : if (!err) {
4987 0 : flags &= ~BRIDGE_FLAGS_SELF;
4988 :
4989 : /* Generate event to notify upper layer of bridge
4990 : * change
4991 : */
4992 0 : err = rtnl_bridge_notify(dev);
4993 : }
4994 : }
4995 :
4996 0 : if (have_flags)
4997 0 : memcpy(nla_data(attr), &flags, sizeof(flags));
4998 0 : out:
4999 : return err;
5000 : }
5001 :
5002 0 : static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
5003 : {
5004 0 : return (mask & IFLA_STATS_FILTER_BIT(attrid)) &&
5005 0 : (!idxattr || idxattr == attrid);
5006 : }
5007 :
5008 : #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
5009 0 : static int rtnl_get_offload_stats_attr_size(int attr_id)
5010 : {
5011 0 : switch (attr_id) {
5012 : case IFLA_OFFLOAD_XSTATS_CPU_HIT:
5013 : return sizeof(struct rtnl_link_stats64);
5014 : }
5015 :
5016 : return 0;
5017 : }
5018 :
5019 0 : static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
5020 : int *prividx)
5021 : {
5022 0 : struct nlattr *attr = NULL;
5023 0 : int attr_id, size;
5024 0 : void *attr_data;
5025 0 : int err;
5026 :
5027 0 : if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
5028 0 : dev->netdev_ops->ndo_get_offload_stats))
5029 : return -ENODATA;
5030 :
5031 0 : for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
5032 0 : attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
5033 0 : if (attr_id < *prividx)
5034 0 : continue;
5035 :
5036 0 : size = rtnl_get_offload_stats_attr_size(attr_id);
5037 0 : if (!size)
5038 : continue;
5039 :
5040 0 : if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
5041 0 : continue;
5042 :
5043 0 : attr = nla_reserve_64bit(skb, attr_id, size,
5044 : IFLA_OFFLOAD_XSTATS_UNSPEC);
5045 0 : if (!attr)
5046 0 : goto nla_put_failure;
5047 :
5048 0 : attr_data = nla_data(attr);
5049 0 : memset(attr_data, 0, size);
5050 0 : err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
5051 : attr_data);
5052 0 : if (err)
5053 0 : goto get_offload_stats_failure;
5054 : }
5055 :
5056 0 : if (!attr)
5057 : return -ENODATA;
5058 :
5059 0 : *prividx = 0;
5060 0 : return 0;
5061 :
5062 0 : nla_put_failure:
5063 0 : err = -EMSGSIZE;
5064 0 : get_offload_stats_failure:
5065 0 : *prividx = attr_id;
5066 0 : return err;
5067 : }
5068 :
5069 0 : static int rtnl_get_offload_stats_size(const struct net_device *dev)
5070 : {
5071 0 : int nla_size = 0;
5072 0 : int attr_id;
5073 0 : int size;
5074 :
5075 0 : if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
5076 0 : dev->netdev_ops->ndo_get_offload_stats))
5077 : return 0;
5078 :
5079 0 : for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
5080 0 : attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
5081 0 : if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
5082 0 : continue;
5083 0 : size = rtnl_get_offload_stats_attr_size(attr_id);
5084 0 : nla_size += nla_total_size_64bit(size);
5085 : }
5086 :
5087 0 : if (nla_size != 0)
5088 0 : nla_size += nla_total_size(0);
5089 :
5090 : return nla_size;
5091 : }
5092 :
5093 0 : static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
5094 : int type, u32 pid, u32 seq, u32 change,
5095 : unsigned int flags, unsigned int filter_mask,
5096 : int *idxattr, int *prividx)
5097 : {
5098 0 : struct if_stats_msg *ifsm;
5099 0 : struct nlmsghdr *nlh;
5100 0 : struct nlattr *attr;
5101 0 : int s_prividx = *prividx;
5102 0 : int err;
5103 :
5104 0 : ASSERT_RTNL();
5105 :
5106 0 : nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags);
5107 0 : if (!nlh)
5108 : return -EMSGSIZE;
5109 :
5110 0 : ifsm = nlmsg_data(nlh);
5111 0 : ifsm->family = PF_UNSPEC;
5112 0 : ifsm->pad1 = 0;
5113 0 : ifsm->pad2 = 0;
5114 0 : ifsm->ifindex = dev->ifindex;
5115 0 : ifsm->filter_mask = filter_mask;
5116 :
5117 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) {
5118 0 : struct rtnl_link_stats64 *sp;
5119 :
5120 0 : attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
5121 : sizeof(struct rtnl_link_stats64),
5122 : IFLA_STATS_UNSPEC);
5123 0 : if (!attr)
5124 0 : goto nla_put_failure;
5125 :
5126 0 : sp = nla_data(attr);
5127 0 : dev_get_stats(dev, sp);
5128 : }
5129 :
5130 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) {
5131 0 : const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5132 :
5133 0 : if (ops && ops->fill_linkxstats) {
5134 0 : *idxattr = IFLA_STATS_LINK_XSTATS;
5135 0 : attr = nla_nest_start_noflag(skb,
5136 : IFLA_STATS_LINK_XSTATS);
5137 0 : if (!attr)
5138 0 : goto nla_put_failure;
5139 :
5140 0 : err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5141 0 : nla_nest_end(skb, attr);
5142 0 : if (err)
5143 0 : goto nla_put_failure;
5144 0 : *idxattr = 0;
5145 : }
5146 : }
5147 :
5148 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE,
5149 : *idxattr)) {
5150 0 : const struct rtnl_link_ops *ops = NULL;
5151 0 : const struct net_device *master;
5152 :
5153 0 : master = netdev_master_upper_dev_get(dev);
5154 0 : if (master)
5155 0 : ops = master->rtnl_link_ops;
5156 0 : if (ops && ops->fill_linkxstats) {
5157 0 : *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
5158 0 : attr = nla_nest_start_noflag(skb,
5159 : IFLA_STATS_LINK_XSTATS_SLAVE);
5160 0 : if (!attr)
5161 0 : goto nla_put_failure;
5162 :
5163 0 : err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
5164 0 : nla_nest_end(skb, attr);
5165 0 : if (err)
5166 0 : goto nla_put_failure;
5167 0 : *idxattr = 0;
5168 : }
5169 : }
5170 :
5171 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
5172 : *idxattr)) {
5173 0 : *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
5174 0 : attr = nla_nest_start_noflag(skb,
5175 : IFLA_STATS_LINK_OFFLOAD_XSTATS);
5176 0 : if (!attr)
5177 0 : goto nla_put_failure;
5178 :
5179 0 : err = rtnl_get_offload_stats(skb, dev, prividx);
5180 0 : if (err == -ENODATA)
5181 0 : nla_nest_cancel(skb, attr);
5182 : else
5183 0 : nla_nest_end(skb, attr);
5184 :
5185 0 : if (err && err != -ENODATA)
5186 0 : goto nla_put_failure;
5187 0 : *idxattr = 0;
5188 : }
5189 :
5190 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
5191 0 : struct rtnl_af_ops *af_ops;
5192 :
5193 0 : *idxattr = IFLA_STATS_AF_SPEC;
5194 0 : attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
5195 0 : if (!attr)
5196 0 : goto nla_put_failure;
5197 :
5198 0 : rcu_read_lock();
5199 0 : list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5200 0 : if (af_ops->fill_stats_af) {
5201 0 : struct nlattr *af;
5202 0 : int err;
5203 :
5204 0 : af = nla_nest_start_noflag(skb,
5205 : af_ops->family);
5206 0 : if (!af) {
5207 0 : rcu_read_unlock();
5208 0 : goto nla_put_failure;
5209 : }
5210 0 : err = af_ops->fill_stats_af(skb, dev);
5211 :
5212 0 : if (err == -ENODATA) {
5213 0 : nla_nest_cancel(skb, af);
5214 0 : } else if (err < 0) {
5215 0 : rcu_read_unlock();
5216 0 : goto nla_put_failure;
5217 : }
5218 :
5219 0 : nla_nest_end(skb, af);
5220 : }
5221 : }
5222 0 : rcu_read_unlock();
5223 :
5224 0 : nla_nest_end(skb, attr);
5225 :
5226 0 : *idxattr = 0;
5227 : }
5228 :
5229 0 : nlmsg_end(skb, nlh);
5230 :
5231 0 : return 0;
5232 :
5233 0 : nla_put_failure:
5234 : /* not a multi message or no progress mean a real error */
5235 0 : if (!(flags & NLM_F_MULTI) || s_prividx == *prividx)
5236 0 : nlmsg_cancel(skb, nlh);
5237 : else
5238 0 : nlmsg_end(skb, nlh);
5239 :
5240 : return -EMSGSIZE;
5241 : }
5242 :
5243 0 : static size_t if_nlmsg_stats_size(const struct net_device *dev,
5244 : u32 filter_mask)
5245 : {
5246 0 : size_t size = 0;
5247 :
5248 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
5249 0 : size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
5250 :
5251 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) {
5252 0 : const struct rtnl_link_ops *ops = dev->rtnl_link_ops;
5253 0 : int attr = IFLA_STATS_LINK_XSTATS;
5254 :
5255 0 : if (ops && ops->get_linkxstats_size) {
5256 0 : size += nla_total_size(ops->get_linkxstats_size(dev,
5257 : attr));
5258 : /* for IFLA_STATS_LINK_XSTATS */
5259 0 : size += nla_total_size(0);
5260 : }
5261 : }
5262 :
5263 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) {
5264 0 : struct net_device *_dev = (struct net_device *)dev;
5265 0 : const struct rtnl_link_ops *ops = NULL;
5266 0 : const struct net_device *master;
5267 :
5268 : /* netdev_master_upper_dev_get can't take const */
5269 0 : master = netdev_master_upper_dev_get(_dev);
5270 0 : if (master)
5271 0 : ops = master->rtnl_link_ops;
5272 0 : if (ops && ops->get_linkxstats_size) {
5273 0 : int attr = IFLA_STATS_LINK_XSTATS_SLAVE;
5274 :
5275 0 : size += nla_total_size(ops->get_linkxstats_size(dev,
5276 : attr));
5277 : /* for IFLA_STATS_LINK_XSTATS_SLAVE */
5278 0 : size += nla_total_size(0);
5279 : }
5280 : }
5281 :
5282 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
5283 0 : size += rtnl_get_offload_stats_size(dev);
5284 :
5285 0 : if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
5286 0 : struct rtnl_af_ops *af_ops;
5287 :
5288 : /* for IFLA_STATS_AF_SPEC */
5289 0 : size += nla_total_size(0);
5290 :
5291 0 : rcu_read_lock();
5292 0 : list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
5293 0 : if (af_ops->get_stats_af_size) {
5294 0 : size += nla_total_size(
5295 0 : af_ops->get_stats_af_size(dev));
5296 :
5297 : /* for AF_* */
5298 0 : size += nla_total_size(0);
5299 : }
5300 : }
5301 0 : rcu_read_unlock();
5302 : }
5303 :
5304 0 : return size;
5305 : }
5306 :
5307 0 : static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
5308 : bool is_dump, struct netlink_ext_ack *extack)
5309 : {
5310 0 : struct if_stats_msg *ifsm;
5311 :
5312 0 : if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) {
5313 0 : NL_SET_ERR_MSG(extack, "Invalid header for stats dump");
5314 0 : return -EINVAL;
5315 : }
5316 :
5317 0 : if (!strict_check)
5318 : return 0;
5319 :
5320 0 : ifsm = nlmsg_data(nlh);
5321 :
5322 : /* only requests using strict checks can pass data to influence
5323 : * the dump. The legacy exception is filter_mask.
5324 : */
5325 0 : if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) {
5326 0 : NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
5327 0 : return -EINVAL;
5328 : }
5329 0 : if (nlmsg_attrlen(nlh, sizeof(*ifsm))) {
5330 0 : NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
5331 0 : return -EINVAL;
5332 : }
5333 0 : if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
5334 0 : NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
5335 0 : return -EINVAL;
5336 : }
5337 :
5338 : return 0;
5339 : }
5340 :
5341 0 : static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
5342 : struct netlink_ext_ack *extack)
5343 : {
5344 0 : struct net *net = sock_net(skb->sk);
5345 0 : struct net_device *dev = NULL;
5346 0 : int idxattr = 0, prividx = 0;
5347 0 : struct if_stats_msg *ifsm;
5348 0 : struct sk_buff *nskb;
5349 0 : u32 filter_mask;
5350 0 : int err;
5351 :
5352 0 : err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
5353 : false, extack);
5354 0 : if (err)
5355 : return err;
5356 :
5357 0 : ifsm = nlmsg_data(nlh);
5358 0 : if (ifsm->ifindex > 0)
5359 0 : dev = __dev_get_by_index(net, ifsm->ifindex);
5360 : else
5361 : return -EINVAL;
5362 :
5363 0 : if (!dev)
5364 : return -ENODEV;
5365 :
5366 0 : filter_mask = ifsm->filter_mask;
5367 0 : if (!filter_mask)
5368 : return -EINVAL;
5369 :
5370 0 : nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
5371 0 : if (!nskb)
5372 : return -ENOBUFS;
5373 :
5374 0 : err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
5375 : NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
5376 : 0, filter_mask, &idxattr, &prividx);
5377 0 : if (err < 0) {
5378 : /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
5379 0 : WARN_ON(err == -EMSGSIZE);
5380 0 : kfree_skb(nskb);
5381 : } else {
5382 0 : err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid);
5383 : }
5384 :
5385 : return err;
5386 : }
5387 :
5388 0 : static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
5389 : {
5390 0 : struct netlink_ext_ack *extack = cb->extack;
5391 0 : int h, s_h, err, s_idx, s_idxattr, s_prividx;
5392 0 : struct net *net = sock_net(skb->sk);
5393 0 : unsigned int flags = NLM_F_MULTI;
5394 0 : struct if_stats_msg *ifsm;
5395 0 : struct hlist_head *head;
5396 0 : struct net_device *dev;
5397 0 : u32 filter_mask = 0;
5398 0 : int idx = 0;
5399 :
5400 0 : s_h = cb->args[0];
5401 0 : s_idx = cb->args[1];
5402 0 : s_idxattr = cb->args[2];
5403 0 : s_prividx = cb->args[3];
5404 :
5405 0 : cb->seq = net->dev_base_seq;
5406 :
5407 0 : err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack);
5408 0 : if (err)
5409 : return err;
5410 :
5411 0 : ifsm = nlmsg_data(cb->nlh);
5412 0 : filter_mask = ifsm->filter_mask;
5413 0 : if (!filter_mask) {
5414 0 : NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
5415 0 : return -EINVAL;
5416 : }
5417 :
5418 0 : for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
5419 0 : idx = 0;
5420 0 : head = &net->dev_index_head[h];
5421 0 : hlist_for_each_entry(dev, head, index_hlist) {
5422 0 : if (idx < s_idx)
5423 0 : goto cont;
5424 0 : err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
5425 0 : NETLINK_CB(cb->skb).portid,
5426 0 : cb->nlh->nlmsg_seq, 0,
5427 : flags, filter_mask,
5428 : &s_idxattr, &s_prividx);
5429 : /* If we ran out of room on the first message,
5430 : * we're in trouble
5431 : */
5432 0 : WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
5433 :
5434 0 : if (err < 0)
5435 0 : goto out;
5436 0 : s_prividx = 0;
5437 0 : s_idxattr = 0;
5438 0 : nl_dump_check_consistent(cb, nlmsg_hdr(skb));
5439 0 : cont:
5440 0 : idx++;
5441 : }
5442 : }
5443 0 : out:
5444 0 : cb->args[3] = s_prividx;
5445 0 : cb->args[2] = s_idxattr;
5446 0 : cb->args[1] = idx;
5447 0 : cb->args[0] = h;
5448 :
5449 0 : return skb->len;
5450 : }
5451 :
5452 : /* Process one rtnetlink message. */
5453 :
5454 43 : static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
5455 : struct netlink_ext_ack *extack)
5456 : {
5457 43 : struct net *net = sock_net(skb->sk);
5458 43 : struct rtnl_link *link;
5459 43 : struct module *owner;
5460 43 : int err = -EOPNOTSUPP;
5461 43 : rtnl_doit_func doit;
5462 43 : unsigned int flags;
5463 43 : int kind;
5464 43 : int family;
5465 43 : int type;
5466 :
5467 43 : type = nlh->nlmsg_type;
5468 43 : if (type > RTM_MAX)
5469 : return -EOPNOTSUPP;
5470 :
5471 43 : type -= RTM_BASE;
5472 :
5473 : /* All the messages must have at least 1 byte length */
5474 43 : if (nlmsg_len(nlh) < sizeof(struct rtgenmsg))
5475 : return 0;
5476 :
5477 43 : family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family;
5478 43 : kind = type&3;
5479 :
5480 43 : if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN))
5481 : return -EPERM;
5482 :
5483 43 : rcu_read_lock();
5484 43 : if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
5485 33 : struct sock *rtnl;
5486 33 : rtnl_dumpit_func dumpit;
5487 33 : u32 min_dump_alloc = 0;
5488 :
5489 33 : link = rtnl_get_link(family, type);
5490 33 : if (!link || !link->dumpit) {
5491 0 : family = PF_UNSPEC;
5492 0 : link = rtnl_get_link(family, type);
5493 0 : if (!link || !link->dumpit)
5494 0 : goto err_unlock;
5495 : }
5496 33 : owner = link->owner;
5497 33 : dumpit = link->dumpit;
5498 :
5499 33 : if (type == RTM_GETLINK - RTM_BASE)
5500 6 : min_dump_alloc = rtnl_calcit(skb, nlh);
5501 :
5502 33 : err = 0;
5503 : /* need to do this before rcu_read_unlock() */
5504 33 : if (!try_module_get(owner))
5505 : err = -EPROTONOSUPPORT;
5506 :
5507 33 : rcu_read_unlock();
5508 :
5509 33 : rtnl = net->rtnl;
5510 33 : if (err == 0) {
5511 33 : struct netlink_dump_control c = {
5512 : .dump = dumpit,
5513 : .min_dump_alloc = min_dump_alloc,
5514 : .module = owner,
5515 : };
5516 33 : err = netlink_dump_start(rtnl, skb, nlh, &c);
5517 : /* netlink_dump_start() will keep a reference on
5518 : * module if dump is still in progress.
5519 : */
5520 33 : module_put(owner);
5521 : }
5522 33 : return err;
5523 : }
5524 :
5525 10 : link = rtnl_get_link(family, type);
5526 10 : if (!link || !link->doit) {
5527 1 : family = PF_UNSPEC;
5528 1 : link = rtnl_get_link(PF_UNSPEC, type);
5529 1 : if (!link || !link->doit)
5530 1 : goto out_unlock;
5531 : }
5532 :
5533 9 : owner = link->owner;
5534 9 : if (!try_module_get(owner)) {
5535 : err = -EPROTONOSUPPORT;
5536 : goto out_unlock;
5537 : }
5538 :
5539 9 : flags = link->flags;
5540 9 : if (flags & RTNL_FLAG_DOIT_UNLOCKED) {
5541 0 : doit = link->doit;
5542 0 : rcu_read_unlock();
5543 0 : if (doit)
5544 0 : err = doit(skb, nlh, extack);
5545 0 : module_put(owner);
5546 0 : return err;
5547 : }
5548 9 : rcu_read_unlock();
5549 :
5550 9 : rtnl_lock();
5551 9 : link = rtnl_get_link(family, type);
5552 9 : if (link && link->doit)
5553 9 : err = link->doit(skb, nlh, extack);
5554 9 : rtnl_unlock();
5555 :
5556 9 : module_put(owner);
5557 :
5558 9 : return err;
5559 :
5560 1 : out_unlock:
5561 1 : rcu_read_unlock();
5562 1 : return err;
5563 :
5564 0 : err_unlock:
5565 0 : rcu_read_unlock();
5566 0 : return -EOPNOTSUPP;
5567 : }
5568 :
5569 43 : static void rtnetlink_rcv(struct sk_buff *skb)
5570 : {
5571 43 : netlink_rcv_skb(skb, &rtnetlink_rcv_msg);
5572 43 : }
5573 :
5574 0 : static int rtnetlink_bind(struct net *net, int group)
5575 : {
5576 0 : switch (group) {
5577 0 : case RTNLGRP_IPV4_MROUTE_R:
5578 : case RTNLGRP_IPV6_MROUTE_R:
5579 0 : if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
5580 0 : return -EPERM;
5581 : break;
5582 : }
5583 : return 0;
5584 : }
5585 :
5586 8 : static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
5587 : {
5588 8 : struct net_device *dev = netdev_notifier_info_to_dev(ptr);
5589 :
5590 8 : switch (event) {
5591 : case NETDEV_REBOOT:
5592 : case NETDEV_CHANGEMTU:
5593 : case NETDEV_CHANGEADDR:
5594 : case NETDEV_CHANGENAME:
5595 : case NETDEV_FEAT_CHANGE:
5596 : case NETDEV_BONDING_FAILOVER:
5597 : case NETDEV_POST_TYPE_CHANGE:
5598 : case NETDEV_NOTIFY_PEERS:
5599 : case NETDEV_CHANGEUPPER:
5600 : case NETDEV_RESEND_IGMP:
5601 : case NETDEV_CHANGEINFODATA:
5602 : case NETDEV_CHANGELOWERSTATE:
5603 : case NETDEV_CHANGE_TX_QUEUE_LEN:
5604 0 : rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
5605 : GFP_KERNEL, NULL, 0);
5606 0 : break;
5607 : default:
5608 : break;
5609 : }
5610 8 : return NOTIFY_DONE;
5611 : }
5612 :
5613 : static struct notifier_block rtnetlink_dev_notifier = {
5614 : .notifier_call = rtnetlink_event,
5615 : };
5616 :
5617 :
5618 1 : static int __net_init rtnetlink_net_init(struct net *net)
5619 : {
5620 1 : struct sock *sk;
5621 1 : struct netlink_kernel_cfg cfg = {
5622 : .groups = RTNLGRP_MAX,
5623 : .input = rtnetlink_rcv,
5624 : .cb_mutex = &rtnl_mutex,
5625 : .flags = NL_CFG_F_NONROOT_RECV,
5626 : .bind = rtnetlink_bind,
5627 : };
5628 :
5629 1 : sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
5630 1 : if (!sk)
5631 : return -ENOMEM;
5632 1 : net->rtnl = sk;
5633 1 : return 0;
5634 : }
5635 :
5636 0 : static void __net_exit rtnetlink_net_exit(struct net *net)
5637 : {
5638 0 : netlink_kernel_release(net->rtnl);
5639 0 : net->rtnl = NULL;
5640 0 : }
5641 :
5642 : static struct pernet_operations rtnetlink_net_ops = {
5643 : .init = rtnetlink_net_init,
5644 : .exit = rtnetlink_net_exit,
5645 : };
5646 :
5647 1 : void __init rtnetlink_init(void)
5648 : {
5649 1 : if (register_pernet_subsys(&rtnetlink_net_ops))
5650 0 : panic("rtnetlink_init: cannot initialize rtnetlink\n");
5651 :
5652 1 : register_netdevice_notifier(&rtnetlink_dev_notifier);
5653 :
5654 1 : rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink,
5655 : rtnl_dump_ifinfo, 0);
5656 1 : rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0);
5657 1 : rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0);
5658 1 : rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0);
5659 :
5660 1 : rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0);
5661 1 : rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0);
5662 1 : rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0);
5663 :
5664 1 : rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0);
5665 1 : rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0);
5666 :
5667 1 : rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0);
5668 1 : rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0);
5669 1 : rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0);
5670 :
5671 1 : rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0);
5672 1 : rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0);
5673 1 : rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0);
5674 :
5675 1 : rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
5676 : 0);
5677 1 : }
|
