Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
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 | * | |
1da177e4 LT |
11 | * Fixes: |
12 | * Vitaly E. Lavrov RTA_OK arithmetics was wrong. | |
13 | */ | |
14 | ||
ee5d032f | 15 | #include <linux/bitops.h> |
1da177e4 LT |
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> | |
1da177e4 LT |
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> | |
6756ae4b | 33 | #include <linux/mutex.h> |
1823730f | 34 | #include <linux/if_addr.h> |
77162022 | 35 | #include <linux/if_bridge.h> |
f6f6424b | 36 | #include <linux/if_vlan.h> |
ebc08a6f | 37 | #include <linux/pci.h> |
77162022 | 38 | #include <linux/etherdevice.h> |
58038695 | 39 | #include <linux/bpf.h> |
1da177e4 | 40 | |
7c0f6ba6 | 41 | #include <linux/uaccess.h> |
1da177e4 LT |
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> | |
ea697639 | 50 | #include <net/tcp.h> |
1da177e4 LT |
51 | #include <net/sock.h> |
52 | #include <net/pkt_sched.h> | |
14c0b97d | 53 | #include <net/fib_rules.h> |
e2849863 | 54 | #include <net/rtnetlink.h> |
30ffee84 | 55 | #include <net/net_namespace.h> |
1da177e4 | 56 | |
a428afe8 | 57 | #define RTNL_MAX_TYPE 50 |
ccf8dbcd KC |
58 | #define RTNL_SLAVE_MAX_TYPE 36 |
59 | ||
e0d087af | 60 | struct rtnl_link { |
e2849863 TG |
61 | rtnl_doit_func doit; |
62 | rtnl_dumpit_func dumpit; | |
e4202511 | 63 | struct module *owner; |
62256f98 | 64 | unsigned int flags; |
addf9b90 | 65 | struct rcu_head rcu; |
e2849863 TG |
66 | }; |
67 | ||
6756ae4b | 68 | static DEFINE_MUTEX(rtnl_mutex); |
1da177e4 LT |
69 | |
70 | void rtnl_lock(void) | |
71 | { | |
6756ae4b | 72 | mutex_lock(&rtnl_mutex); |
1da177e4 | 73 | } |
e0d087af | 74 | EXPORT_SYMBOL(rtnl_lock); |
1da177e4 | 75 | |
79ffdfc6 KT |
76 | int rtnl_lock_killable(void) |
77 | { | |
78 | return mutex_lock_killable(&rtnl_mutex); | |
79 | } | |
80 | EXPORT_SYMBOL(rtnl_lock_killable); | |
81 | ||
1b5c5493 ED |
82 | static struct sk_buff *defer_kfree_skb_list; |
83 | void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) | |
84 | { | |
85 | if (head && tail) { | |
86 | tail->next = defer_kfree_skb_list; | |
87 | defer_kfree_skb_list = head; | |
88 | } | |
89 | } | |
90 | EXPORT_SYMBOL(rtnl_kfree_skbs); | |
91 | ||
6756ae4b | 92 | void __rtnl_unlock(void) |
1da177e4 | 93 | { |
1b5c5493 ED |
94 | struct sk_buff *head = defer_kfree_skb_list; |
95 | ||
96 | defer_kfree_skb_list = NULL; | |
97 | ||
6756ae4b | 98 | mutex_unlock(&rtnl_mutex); |
1b5c5493 ED |
99 | |
100 | while (head) { | |
101 | struct sk_buff *next = head->next; | |
102 | ||
103 | kfree_skb(head); | |
104 | cond_resched(); | |
105 | head = next; | |
106 | } | |
1da177e4 | 107 | } |
6756ae4b | 108 | |
1da177e4 LT |
109 | void rtnl_unlock(void) |
110 | { | |
58ec3b4d | 111 | /* This fellow will unlock it for us. */ |
1da177e4 LT |
112 | netdev_run_todo(); |
113 | } | |
e0d087af | 114 | EXPORT_SYMBOL(rtnl_unlock); |
1da177e4 | 115 | |
6756ae4b SH |
116 | int rtnl_trylock(void) |
117 | { | |
118 | return mutex_trylock(&rtnl_mutex); | |
119 | } | |
e0d087af | 120 | EXPORT_SYMBOL(rtnl_trylock); |
6756ae4b | 121 | |
c9c1014b PM |
122 | int rtnl_is_locked(void) |
123 | { | |
124 | return mutex_is_locked(&rtnl_mutex); | |
125 | } | |
e0d087af | 126 | EXPORT_SYMBOL(rtnl_is_locked); |
c9c1014b | 127 | |
6f99528e VB |
128 | bool refcount_dec_and_rtnl_lock(refcount_t *r) |
129 | { | |
130 | return refcount_dec_and_mutex_lock(r, &rtnl_mutex); | |
131 | } | |
132 | EXPORT_SYMBOL(refcount_dec_and_rtnl_lock); | |
133 | ||
a898def2 | 134 | #ifdef CONFIG_PROVE_LOCKING |
0cbf3343 | 135 | bool lockdep_rtnl_is_held(void) |
a898def2 PM |
136 | { |
137 | return lockdep_is_held(&rtnl_mutex); | |
138 | } | |
139 | EXPORT_SYMBOL(lockdep_rtnl_is_held); | |
140 | #endif /* #ifdef CONFIG_PROVE_LOCKING */ | |
141 | ||
b0e9fe1b | 142 | static struct rtnl_link *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; |
e2849863 TG |
143 | |
144 | static inline int rtm_msgindex(int msgtype) | |
145 | { | |
146 | 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 | BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); | |
154 | ||
155 | return msgindex; | |
156 | } | |
157 | ||
addf9b90 FW |
158 | static struct rtnl_link *rtnl_get_link(int protocol, int msgtype) |
159 | { | |
160 | struct rtnl_link **tab; | |
161 | ||
162 | if (protocol >= ARRAY_SIZE(rtnl_msg_handlers)) | |
163 | protocol = PF_UNSPEC; | |
164 | ||
165 | tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]); | |
166 | if (!tab) | |
167 | tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]); | |
168 | ||
169 | return tab[msgtype]; | |
170 | } | |
171 | ||
e4202511 FW |
172 | 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) | |
e2849863 | 176 | { |
b0e9fe1b FW |
177 | struct rtnl_link *link, *old; |
178 | struct rtnl_link __rcu **tab; | |
e2849863 | 179 | int msgindex; |
addf9b90 | 180 | int ret = -ENOBUFS; |
e2849863 | 181 | |
25239cee | 182 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 TG |
183 | msgindex = rtm_msgindex(msgtype); |
184 | ||
addf9b90 FW |
185 | rtnl_lock(); |
186 | tab = rtnl_msg_handlers[protocol]; | |
e2849863 | 187 | if (tab == NULL) { |
addf9b90 FW |
188 | tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL); |
189 | if (!tab) | |
190 | goto unlock; | |
e2849863 | 191 | |
addf9b90 | 192 | /* ensures we see the 0 stores */ |
6853dd48 | 193 | rcu_assign_pointer(rtnl_msg_handlers[protocol], tab); |
e2849863 TG |
194 | } |
195 | ||
addf9b90 FW |
196 | old = rtnl_dereference(tab[msgindex]); |
197 | if (old) { | |
198 | link = kmemdup(old, sizeof(*old), GFP_KERNEL); | |
199 | if (!link) | |
200 | goto unlock; | |
201 | } else { | |
202 | link = kzalloc(sizeof(*link), GFP_KERNEL); | |
203 | if (!link) | |
204 | goto unlock; | |
205 | } | |
206 | ||
e4202511 FW |
207 | WARN_ON(link->owner && link->owner != owner); |
208 | link->owner = owner; | |
209 | ||
addf9b90 | 210 | WARN_ON(doit && link->doit && link->doit != doit); |
e2849863 | 211 | if (doit) |
addf9b90 FW |
212 | link->doit = doit; |
213 | WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit); | |
e2849863 | 214 | if (dumpit) |
addf9b90 | 215 | link->dumpit = dumpit; |
e2849863 | 216 | |
addf9b90 FW |
217 | link->flags |= flags; |
218 | ||
219 | /* publish protocol:msgtype */ | |
220 | rcu_assign_pointer(tab[msgindex], link); | |
221 | ret = 0; | |
222 | if (old) | |
223 | kfree_rcu(old, rcu); | |
224 | unlock: | |
225 | rtnl_unlock(); | |
226 | return ret; | |
e2849863 | 227 | } |
e4202511 FW |
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 | 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 | return rtnl_register_internal(owner, protocol, msgtype, | |
247 | doit, dumpit, flags); | |
248 | } | |
249 | EXPORT_SYMBOL_GPL(rtnl_register_module); | |
250 | ||
251 | /** | |
16feebcf | 252 | * rtnl_register - Register a rtnetlink message type |
e4202511 FW |
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. | |
e2849863 TG |
266 | */ |
267 | void rtnl_register(int protocol, int msgtype, | |
c7ac8679 | 268 | rtnl_doit_func doit, rtnl_dumpit_func dumpit, |
b97bac64 | 269 | unsigned int flags) |
e2849863 | 270 | { |
16feebcf FW |
271 | int err; |
272 | ||
273 | err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit, | |
274 | flags); | |
275 | if (err) | |
276 | pr_err("Unable to register rtnetlink message handler, " | |
277 | "protocol = %d, message type = %d\n", protocol, msgtype); | |
e2849863 | 278 | } |
e2849863 TG |
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 | int rtnl_unregister(int protocol, int msgtype) | |
288 | { | |
addf9b90 | 289 | struct rtnl_link **tab, *link; |
e2849863 TG |
290 | int msgindex; |
291 | ||
25239cee | 292 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 TG |
293 | msgindex = rtm_msgindex(msgtype); |
294 | ||
6853dd48 | 295 | rtnl_lock(); |
addf9b90 FW |
296 | tab = rtnl_dereference(rtnl_msg_handlers[protocol]); |
297 | if (!tab) { | |
6853dd48 | 298 | rtnl_unlock(); |
e2849863 | 299 | return -ENOENT; |
6853dd48 | 300 | } |
e2849863 | 301 | |
addf9b90 FW |
302 | link = tab[msgindex]; |
303 | rcu_assign_pointer(tab[msgindex], NULL); | |
6853dd48 | 304 | rtnl_unlock(); |
e2849863 | 305 | |
addf9b90 FW |
306 | kfree_rcu(link, rcu); |
307 | ||
e2849863 TG |
308 | return 0; |
309 | } | |
e2849863 TG |
310 | EXPORT_SYMBOL_GPL(rtnl_unregister); |
311 | ||
312 | /** | |
313 | * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol | |
314 | * @protocol : Protocol family or PF_UNSPEC | |
315 | * | |
316 | * Identical to calling rtnl_unregster() for all registered message types | |
317 | * of a certain protocol family. | |
318 | */ | |
319 | void rtnl_unregister_all(int protocol) | |
320 | { | |
addf9b90 FW |
321 | struct rtnl_link **tab, *link; |
322 | int msgindex; | |
019a3169 | 323 | |
25239cee | 324 | BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); |
e2849863 | 325 | |
019a3169 | 326 | rtnl_lock(); |
addf9b90 | 327 | tab = rtnl_msg_handlers[protocol]; |
f707ef61 SD |
328 | if (!tab) { |
329 | rtnl_unlock(); | |
330 | return; | |
331 | } | |
6853dd48 | 332 | RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL); |
addf9b90 FW |
333 | for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) { |
334 | link = tab[msgindex]; | |
335 | if (!link) | |
336 | continue; | |
337 | ||
338 | rcu_assign_pointer(tab[msgindex], NULL); | |
339 | kfree_rcu(link, rcu); | |
340 | } | |
019a3169 FW |
341 | rtnl_unlock(); |
342 | ||
6853dd48 FW |
343 | synchronize_net(); |
344 | ||
addf9b90 | 345 | kfree(tab); |
e2849863 | 346 | } |
e2849863 | 347 | EXPORT_SYMBOL_GPL(rtnl_unregister_all); |
1da177e4 | 348 | |
38f7b870 PM |
349 | static LIST_HEAD(link_ops); |
350 | ||
c63044f0 ED |
351 | static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) |
352 | { | |
353 | const struct rtnl_link_ops *ops; | |
354 | ||
355 | list_for_each_entry(ops, &link_ops, list) { | |
356 | if (!strcmp(ops->kind, kind)) | |
357 | return ops; | |
358 | } | |
359 | return NULL; | |
360 | } | |
361 | ||
38f7b870 PM |
362 | /** |
363 | * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. | |
364 | * @ops: struct rtnl_link_ops * to register | |
365 | * | |
366 | * The caller must hold the rtnl_mutex. This function should be used | |
367 | * by drivers that create devices during module initialization. It | |
368 | * must be called before registering the devices. | |
369 | * | |
370 | * Returns 0 on success or a negative error code. | |
371 | */ | |
372 | int __rtnl_link_register(struct rtnl_link_ops *ops) | |
373 | { | |
c63044f0 ED |
374 | if (rtnl_link_ops_get(ops->kind)) |
375 | return -EEXIST; | |
376 | ||
b0ab2fab JP |
377 | /* The check for setup is here because if ops |
378 | * does not have that filled up, it is not possible | |
379 | * to use the ops for creating device. So do not | |
380 | * fill up dellink as well. That disables rtnl_dellink. | |
381 | */ | |
382 | if (ops->setup && !ops->dellink) | |
23289a37 | 383 | ops->dellink = unregister_netdevice_queue; |
2d85cba2 | 384 | |
38f7b870 PM |
385 | list_add_tail(&ops->list, &link_ops); |
386 | return 0; | |
387 | } | |
38f7b870 PM |
388 | EXPORT_SYMBOL_GPL(__rtnl_link_register); |
389 | ||
390 | /** | |
391 | * rtnl_link_register - Register rtnl_link_ops with rtnetlink. | |
392 | * @ops: struct rtnl_link_ops * to register | |
393 | * | |
394 | * Returns 0 on success or a negative error code. | |
395 | */ | |
396 | int rtnl_link_register(struct rtnl_link_ops *ops) | |
397 | { | |
398 | int err; | |
399 | ||
ccf8dbcd KC |
400 | /* Sanity-check max sizes to avoid stack buffer overflow. */ |
401 | if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE || | |
402 | ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)) | |
403 | return -EINVAL; | |
404 | ||
38f7b870 PM |
405 | rtnl_lock(); |
406 | err = __rtnl_link_register(ops); | |
407 | rtnl_unlock(); | |
408 | return err; | |
409 | } | |
38f7b870 PM |
410 | EXPORT_SYMBOL_GPL(rtnl_link_register); |
411 | ||
669f87ba PE |
412 | static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) |
413 | { | |
414 | struct net_device *dev; | |
23289a37 ED |
415 | LIST_HEAD(list_kill); |
416 | ||
669f87ba | 417 | for_each_netdev(net, dev) { |
23289a37 ED |
418 | if (dev->rtnl_link_ops == ops) |
419 | ops->dellink(dev, &list_kill); | |
669f87ba | 420 | } |
23289a37 | 421 | unregister_netdevice_many(&list_kill); |
669f87ba PE |
422 | } |
423 | ||
38f7b870 PM |
424 | /** |
425 | * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. | |
426 | * @ops: struct rtnl_link_ops * to unregister | |
427 | * | |
554873e5 KT |
428 | * The caller must hold the rtnl_mutex and guarantee net_namespace_list |
429 | * integrity (hold pernet_ops_rwsem for writing to close the race | |
430 | * with setup_net() and cleanup_net()). | |
38f7b870 PM |
431 | */ |
432 | void __rtnl_link_unregister(struct rtnl_link_ops *ops) | |
433 | { | |
881d966b | 434 | struct net *net; |
2d85cba2 | 435 | |
881d966b | 436 | for_each_net(net) { |
669f87ba | 437 | __rtnl_kill_links(net, ops); |
2d85cba2 | 438 | } |
38f7b870 PM |
439 | list_del(&ops->list); |
440 | } | |
38f7b870 PM |
441 | EXPORT_SYMBOL_GPL(__rtnl_link_unregister); |
442 | ||
200b916f CW |
443 | /* Return with the rtnl_lock held when there are no network |
444 | * devices unregistering in any network namespace. | |
445 | */ | |
446 | static void rtnl_lock_unregistering_all(void) | |
447 | { | |
448 | struct net *net; | |
449 | bool unregistering; | |
ff960a73 | 450 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
200b916f | 451 | |
ff960a73 | 452 | add_wait_queue(&netdev_unregistering_wq, &wait); |
200b916f | 453 | for (;;) { |
200b916f CW |
454 | unregistering = false; |
455 | rtnl_lock(); | |
f0b07bb1 KT |
456 | /* We held write locked pernet_ops_rwsem, and parallel |
457 | * setup_net() and cleanup_net() are not possible. | |
458 | */ | |
200b916f CW |
459 | for_each_net(net) { |
460 | if (net->dev_unreg_count > 0) { | |
461 | unregistering = true; | |
462 | break; | |
463 | } | |
464 | } | |
465 | if (!unregistering) | |
466 | break; | |
467 | __rtnl_unlock(); | |
ff960a73 PZ |
468 | |
469 | wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); | |
200b916f | 470 | } |
ff960a73 | 471 | remove_wait_queue(&netdev_unregistering_wq, &wait); |
200b916f CW |
472 | } |
473 | ||
38f7b870 PM |
474 | /** |
475 | * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. | |
476 | * @ops: struct rtnl_link_ops * to unregister | |
477 | */ | |
478 | void rtnl_link_unregister(struct rtnl_link_ops *ops) | |
479 | { | |
8518e9bb | 480 | /* Close the race with setup_net() and cleanup_net() */ |
4420bf21 | 481 | down_write(&pernet_ops_rwsem); |
200b916f | 482 | rtnl_lock_unregistering_all(); |
38f7b870 PM |
483 | __rtnl_link_unregister(ops); |
484 | rtnl_unlock(); | |
4420bf21 | 485 | up_write(&pernet_ops_rwsem); |
38f7b870 | 486 | } |
38f7b870 PM |
487 | EXPORT_SYMBOL_GPL(rtnl_link_unregister); |
488 | ||
ba7d49b1 JP |
489 | static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) |
490 | { | |
491 | struct net_device *master_dev; | |
492 | const struct rtnl_link_ops *ops; | |
8515ae38 | 493 | size_t size = 0; |
ba7d49b1 | 494 | |
8515ae38 FW |
495 | rcu_read_lock(); |
496 | ||
497 | master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); | |
ba7d49b1 | 498 | if (!master_dev) |
8515ae38 FW |
499 | goto out; |
500 | ||
ba7d49b1 | 501 | ops = master_dev->rtnl_link_ops; |
6049f253 | 502 | if (!ops || !ops->get_slave_size) |
8515ae38 | 503 | goto out; |
ba7d49b1 | 504 | /* IFLA_INFO_SLAVE_DATA + nested data */ |
8515ae38 | 505 | size = nla_total_size(sizeof(struct nlattr)) + |
ba7d49b1 | 506 | ops->get_slave_size(master_dev, dev); |
8515ae38 FW |
507 | |
508 | out: | |
509 | rcu_read_unlock(); | |
510 | return size; | |
ba7d49b1 JP |
511 | } |
512 | ||
38f7b870 PM |
513 | static size_t rtnl_link_get_size(const struct net_device *dev) |
514 | { | |
515 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
516 | size_t size; | |
517 | ||
518 | if (!ops) | |
519 | return 0; | |
520 | ||
369cf77a TG |
521 | size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ |
522 | nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ | |
38f7b870 PM |
523 | |
524 | if (ops->get_size) | |
525 | /* IFLA_INFO_DATA + nested data */ | |
369cf77a | 526 | size += nla_total_size(sizeof(struct nlattr)) + |
38f7b870 PM |
527 | ops->get_size(dev); |
528 | ||
529 | if (ops->get_xstats_size) | |
369cf77a TG |
530 | /* IFLA_INFO_XSTATS */ |
531 | size += nla_total_size(ops->get_xstats_size(dev)); | |
38f7b870 | 532 | |
ba7d49b1 JP |
533 | size += rtnl_link_get_slave_info_data_size(dev); |
534 | ||
38f7b870 PM |
535 | return size; |
536 | } | |
537 | ||
f8ff182c TG |
538 | static LIST_HEAD(rtnl_af_ops); |
539 | ||
540 | static const struct rtnl_af_ops *rtnl_af_lookup(const int family) | |
541 | { | |
542 | const struct rtnl_af_ops *ops; | |
543 | ||
5fa85a09 | 544 | list_for_each_entry_rcu(ops, &rtnl_af_ops, list) { |
f8ff182c TG |
545 | if (ops->family == family) |
546 | return ops; | |
547 | } | |
548 | ||
549 | return NULL; | |
550 | } | |
551 | ||
f8ff182c TG |
552 | /** |
553 | * rtnl_af_register - Register rtnl_af_ops with rtnetlink. | |
554 | * @ops: struct rtnl_af_ops * to register | |
555 | * | |
556 | * Returns 0 on success or a negative error code. | |
557 | */ | |
3678a9d8 | 558 | void rtnl_af_register(struct rtnl_af_ops *ops) |
f8ff182c | 559 | { |
f8ff182c | 560 | rtnl_lock(); |
5fa85a09 | 561 | list_add_tail_rcu(&ops->list, &rtnl_af_ops); |
f8ff182c | 562 | rtnl_unlock(); |
f8ff182c TG |
563 | } |
564 | EXPORT_SYMBOL_GPL(rtnl_af_register); | |
565 | ||
f8ff182c TG |
566 | /** |
567 | * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. | |
568 | * @ops: struct rtnl_af_ops * to unregister | |
569 | */ | |
570 | void rtnl_af_unregister(struct rtnl_af_ops *ops) | |
571 | { | |
572 | rtnl_lock(); | |
5fa85a09 | 573 | list_del_rcu(&ops->list); |
f8ff182c | 574 | rtnl_unlock(); |
5fa85a09 FW |
575 | |
576 | synchronize_rcu(); | |
f8ff182c TG |
577 | } |
578 | EXPORT_SYMBOL_GPL(rtnl_af_unregister); | |
579 | ||
b1974ed0 AR |
580 | static size_t rtnl_link_get_af_size(const struct net_device *dev, |
581 | u32 ext_filter_mask) | |
f8ff182c TG |
582 | { |
583 | struct rtnl_af_ops *af_ops; | |
584 | size_t size; | |
585 | ||
586 | /* IFLA_AF_SPEC */ | |
587 | size = nla_total_size(sizeof(struct nlattr)); | |
588 | ||
5fa85a09 FW |
589 | rcu_read_lock(); |
590 | list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { | |
f8ff182c TG |
591 | if (af_ops->get_link_af_size) { |
592 | /* AF_* + nested data */ | |
593 | size += nla_total_size(sizeof(struct nlattr)) + | |
b1974ed0 | 594 | af_ops->get_link_af_size(dev, ext_filter_mask); |
f8ff182c TG |
595 | } |
596 | } | |
5fa85a09 | 597 | rcu_read_unlock(); |
f8ff182c TG |
598 | |
599 | return size; | |
600 | } | |
601 | ||
ba7d49b1 | 602 | static bool rtnl_have_link_slave_info(const struct net_device *dev) |
38f7b870 | 603 | { |
ba7d49b1 | 604 | struct net_device *master_dev; |
4c82a95e | 605 | bool ret = false; |
38f7b870 | 606 | |
4c82a95e FW |
607 | rcu_read_lock(); |
608 | ||
609 | master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); | |
813f020c | 610 | if (master_dev && master_dev->rtnl_link_ops) |
4c82a95e FW |
611 | ret = true; |
612 | rcu_read_unlock(); | |
613 | return ret; | |
ba7d49b1 JP |
614 | } |
615 | ||
616 | static int rtnl_link_slave_info_fill(struct sk_buff *skb, | |
617 | const struct net_device *dev) | |
618 | { | |
619 | struct net_device *master_dev; | |
620 | const struct rtnl_link_ops *ops; | |
621 | struct nlattr *slave_data; | |
622 | int err; | |
38f7b870 | 623 | |
ba7d49b1 JP |
624 | master_dev = netdev_master_upper_dev_get((struct net_device *) dev); |
625 | if (!master_dev) | |
626 | return 0; | |
627 | ops = master_dev->rtnl_link_ops; | |
628 | if (!ops) | |
629 | return 0; | |
630 | if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) | |
631 | return -EMSGSIZE; | |
632 | if (ops->fill_slave_info) { | |
ae0be8de | 633 | slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA); |
ba7d49b1 JP |
634 | if (!slave_data) |
635 | return -EMSGSIZE; | |
636 | err = ops->fill_slave_info(skb, master_dev, dev); | |
637 | if (err < 0) | |
638 | goto err_cancel_slave_data; | |
639 | nla_nest_end(skb, slave_data); | |
640 | } | |
641 | return 0; | |
642 | ||
643 | err_cancel_slave_data: | |
644 | nla_nest_cancel(skb, slave_data); | |
645 | return err; | |
646 | } | |
647 | ||
648 | static int rtnl_link_info_fill(struct sk_buff *skb, | |
649 | const struct net_device *dev) | |
650 | { | |
651 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
652 | struct nlattr *data; | |
653 | int err; | |
654 | ||
655 | if (!ops) | |
656 | return 0; | |
38f7b870 | 657 | if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) |
ba7d49b1 | 658 | return -EMSGSIZE; |
38f7b870 PM |
659 | if (ops->fill_xstats) { |
660 | err = ops->fill_xstats(skb, dev); | |
661 | if (err < 0) | |
ba7d49b1 | 662 | return err; |
38f7b870 PM |
663 | } |
664 | if (ops->fill_info) { | |
ae0be8de | 665 | data = nla_nest_start_noflag(skb, IFLA_INFO_DATA); |
ba7d49b1 JP |
666 | if (data == NULL) |
667 | return -EMSGSIZE; | |
38f7b870 PM |
668 | err = ops->fill_info(skb, dev); |
669 | if (err < 0) | |
670 | goto err_cancel_data; | |
671 | nla_nest_end(skb, data); | |
672 | } | |
38f7b870 PM |
673 | return 0; |
674 | ||
675 | err_cancel_data: | |
676 | nla_nest_cancel(skb, data); | |
ba7d49b1 JP |
677 | return err; |
678 | } | |
679 | ||
680 | static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) | |
681 | { | |
682 | struct nlattr *linkinfo; | |
683 | int err = -EMSGSIZE; | |
684 | ||
ae0be8de | 685 | linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO); |
ba7d49b1 JP |
686 | if (linkinfo == NULL) |
687 | goto out; | |
688 | ||
689 | err = rtnl_link_info_fill(skb, dev); | |
690 | if (err < 0) | |
691 | goto err_cancel_link; | |
692 | ||
693 | err = rtnl_link_slave_info_fill(skb, dev); | |
694 | if (err < 0) | |
695 | goto err_cancel_link; | |
696 | ||
697 | nla_nest_end(skb, linkinfo); | |
698 | return 0; | |
699 | ||
38f7b870 PM |
700 | err_cancel_link: |
701 | nla_nest_cancel(skb, linkinfo); | |
702 | out: | |
703 | return err; | |
704 | } | |
705 | ||
95c96174 | 706 | int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) |
1da177e4 | 707 | { |
97c53cac | 708 | struct sock *rtnl = net->rtnl; |
1da177e4 LT |
709 | int err = 0; |
710 | ||
ac6d439d | 711 | NETLINK_CB(skb).dst_group = group; |
1da177e4 | 712 | if (echo) |
63354797 | 713 | refcount_inc(&skb->users); |
1da177e4 LT |
714 | netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); |
715 | if (echo) | |
716 | err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); | |
717 | return err; | |
718 | } | |
719 | ||
97c53cac | 720 | int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) |
2942e900 | 721 | { |
97c53cac DL |
722 | struct sock *rtnl = net->rtnl; |
723 | ||
2942e900 TG |
724 | return nlmsg_unicast(rtnl, skb, pid); |
725 | } | |
e0d087af | 726 | EXPORT_SYMBOL(rtnl_unicast); |
2942e900 | 727 | |
1ce85fe4 PNA |
728 | void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, |
729 | struct nlmsghdr *nlh, gfp_t flags) | |
97676b6b | 730 | { |
97c53cac | 731 | struct sock *rtnl = net->rtnl; |
97676b6b TG |
732 | int report = 0; |
733 | ||
734 | if (nlh) | |
735 | report = nlmsg_report(nlh); | |
736 | ||
1ce85fe4 | 737 | nlmsg_notify(rtnl, skb, pid, group, report, flags); |
97676b6b | 738 | } |
e0d087af | 739 | EXPORT_SYMBOL(rtnl_notify); |
97676b6b | 740 | |
97c53cac | 741 | void rtnl_set_sk_err(struct net *net, u32 group, int error) |
97676b6b | 742 | { |
97c53cac DL |
743 | struct sock *rtnl = net->rtnl; |
744 | ||
97676b6b TG |
745 | netlink_set_err(rtnl, 0, group, error); |
746 | } | |
e0d087af | 747 | EXPORT_SYMBOL(rtnl_set_sk_err); |
97676b6b | 748 | |
1da177e4 LT |
749 | int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) |
750 | { | |
2d7202bf TG |
751 | struct nlattr *mx; |
752 | int i, valid = 0; | |
753 | ||
c22a133a DA |
754 | /* nothing is dumped for dst_default_metrics, so just skip the loop */ |
755 | if (metrics == dst_default_metrics.metrics) | |
756 | return 0; | |
757 | ||
ae0be8de | 758 | mx = nla_nest_start_noflag(skb, RTA_METRICS); |
2d7202bf TG |
759 | if (mx == NULL) |
760 | return -ENOBUFS; | |
761 | ||
762 | for (i = 0; i < RTAX_MAX; i++) { | |
763 | if (metrics[i]) { | |
ea697639 DB |
764 | if (i == RTAX_CC_ALGO - 1) { |
765 | char tmp[TCP_CA_NAME_MAX], *name; | |
766 | ||
767 | name = tcp_ca_get_name_by_key(metrics[i], tmp); | |
768 | if (!name) | |
769 | continue; | |
770 | if (nla_put_string(skb, i + 1, name)) | |
771 | goto nla_put_failure; | |
c3a8d947 DB |
772 | } else if (i == RTAX_FEATURES - 1) { |
773 | u32 user_features = metrics[i] & RTAX_FEATURE_MASK; | |
774 | ||
f8edcd12 PS |
775 | if (!user_features) |
776 | continue; | |
c3a8d947 DB |
777 | BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); |
778 | if (nla_put_u32(skb, i + 1, user_features)) | |
779 | goto nla_put_failure; | |
ea697639 DB |
780 | } else { |
781 | if (nla_put_u32(skb, i + 1, metrics[i])) | |
782 | goto nla_put_failure; | |
783 | } | |
2d7202bf | 784 | valid++; |
2d7202bf | 785 | } |
1da177e4 | 786 | } |
1da177e4 | 787 | |
a57d27fc DM |
788 | if (!valid) { |
789 | nla_nest_cancel(skb, mx); | |
790 | return 0; | |
791 | } | |
2d7202bf TG |
792 | |
793 | return nla_nest_end(skb, mx); | |
794 | ||
795 | nla_put_failure: | |
bc3ed28c TG |
796 | nla_nest_cancel(skb, mx); |
797 | return -EMSGSIZE; | |
1da177e4 | 798 | } |
e0d087af | 799 | EXPORT_SYMBOL(rtnetlink_put_metrics); |
1da177e4 | 800 | |
e3703b3d | 801 | int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, |
87a50699 | 802 | long expires, u32 error) |
e3703b3d TG |
803 | { |
804 | struct rta_cacheinfo ci = { | |
e3703b3d TG |
805 | .rta_error = error, |
806 | .rta_id = id, | |
e3703b3d TG |
807 | }; |
808 | ||
3940746d DA |
809 | if (dst) { |
810 | ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse); | |
811 | ci.rta_used = dst->__use; | |
812 | ci.rta_clntref = atomic_read(&dst->__refcnt); | |
813 | } | |
8253947e LW |
814 | if (expires) { |
815 | unsigned long clock; | |
e3703b3d | 816 | |
8253947e LW |
817 | clock = jiffies_to_clock_t(abs(expires)); |
818 | clock = min_t(unsigned long, clock, INT_MAX); | |
819 | ci.rta_expires = (expires > 0) ? clock : -clock; | |
820 | } | |
e3703b3d TG |
821 | return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); |
822 | } | |
e3703b3d | 823 | EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); |
1da177e4 | 824 | |
93b2d4a2 | 825 | static void set_operstate(struct net_device *dev, unsigned char transition) |
b00055aa SR |
826 | { |
827 | unsigned char operstate = dev->operstate; | |
828 | ||
e0d087af | 829 | switch (transition) { |
b00055aa SR |
830 | case IF_OPER_UP: |
831 | if ((operstate == IF_OPER_DORMANT || | |
832 | operstate == IF_OPER_UNKNOWN) && | |
833 | !netif_dormant(dev)) | |
834 | operstate = IF_OPER_UP; | |
835 | break; | |
836 | ||
837 | case IF_OPER_DORMANT: | |
838 | if (operstate == IF_OPER_UP || | |
839 | operstate == IF_OPER_UNKNOWN) | |
840 | operstate = IF_OPER_DORMANT; | |
841 | break; | |
3ff50b79 | 842 | } |
b00055aa SR |
843 | |
844 | if (dev->operstate != operstate) { | |
845 | write_lock_bh(&dev_base_lock); | |
846 | dev->operstate = operstate; | |
847 | write_unlock_bh(&dev_base_lock); | |
93b2d4a2 DM |
848 | netdev_state_change(dev); |
849 | } | |
b00055aa SR |
850 | } |
851 | ||
b1beb681 JB |
852 | static unsigned int rtnl_dev_get_flags(const struct net_device *dev) |
853 | { | |
854 | return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | | |
855 | (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); | |
856 | } | |
857 | ||
3729d502 PM |
858 | static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, |
859 | const struct ifinfomsg *ifm) | |
860 | { | |
861 | unsigned int flags = ifm->ifi_flags; | |
862 | ||
863 | /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ | |
864 | if (ifm->ifi_change) | |
865 | flags = (flags & ifm->ifi_change) | | |
b1beb681 | 866 | (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); |
3729d502 PM |
867 | |
868 | return flags; | |
869 | } | |
870 | ||
b60c5115 | 871 | static void copy_rtnl_link_stats(struct rtnl_link_stats *a, |
be1f3c2c | 872 | const struct rtnl_link_stats64 *b) |
1da177e4 | 873 | { |
b60c5115 TG |
874 | a->rx_packets = b->rx_packets; |
875 | a->tx_packets = b->tx_packets; | |
876 | a->rx_bytes = b->rx_bytes; | |
877 | a->tx_bytes = b->tx_bytes; | |
878 | a->rx_errors = b->rx_errors; | |
879 | a->tx_errors = b->tx_errors; | |
880 | a->rx_dropped = b->rx_dropped; | |
881 | a->tx_dropped = b->tx_dropped; | |
882 | ||
883 | a->multicast = b->multicast; | |
884 | a->collisions = b->collisions; | |
885 | ||
886 | a->rx_length_errors = b->rx_length_errors; | |
887 | a->rx_over_errors = b->rx_over_errors; | |
888 | a->rx_crc_errors = b->rx_crc_errors; | |
889 | a->rx_frame_errors = b->rx_frame_errors; | |
890 | a->rx_fifo_errors = b->rx_fifo_errors; | |
891 | a->rx_missed_errors = b->rx_missed_errors; | |
892 | ||
893 | a->tx_aborted_errors = b->tx_aborted_errors; | |
894 | a->tx_carrier_errors = b->tx_carrier_errors; | |
895 | a->tx_fifo_errors = b->tx_fifo_errors; | |
896 | a->tx_heartbeat_errors = b->tx_heartbeat_errors; | |
897 | a->tx_window_errors = b->tx_window_errors; | |
898 | ||
899 | a->rx_compressed = b->rx_compressed; | |
900 | a->tx_compressed = b->tx_compressed; | |
6e7333d3 JW |
901 | |
902 | a->rx_nohandler = b->rx_nohandler; | |
10708f37 JE |
903 | } |
904 | ||
c02db8c6 | 905 | /* All VF info */ |
115c9b81 GR |
906 | static inline int rtnl_vfinfo_size(const struct net_device *dev, |
907 | u32 ext_filter_mask) | |
ebc08a6f | 908 | { |
9af15c38 | 909 | if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) { |
c02db8c6 | 910 | int num_vfs = dev_num_vf(dev->dev.parent); |
7e75f74a | 911 | size_t size = nla_total_size(0); |
045de01a | 912 | size += num_vfs * |
7e75f74a SD |
913 | (nla_total_size(0) + |
914 | nla_total_size(sizeof(struct ifla_vf_mac)) + | |
75345f88 | 915 | nla_total_size(sizeof(struct ifla_vf_broadcast)) + |
7e75f74a SD |
916 | nla_total_size(sizeof(struct ifla_vf_vlan)) + |
917 | nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */ | |
79aab093 MS |
918 | nla_total_size(MAX_VLAN_LIST_LEN * |
919 | sizeof(struct ifla_vf_vlan_info)) + | |
ed616689 | 920 | nla_total_size(sizeof(struct ifla_vf_spoofchk)) + |
7e75f74a | 921 | nla_total_size(sizeof(struct ifla_vf_tx_rate)) + |
945a3676 | 922 | nla_total_size(sizeof(struct ifla_vf_rate)) + |
01a3d796 | 923 | nla_total_size(sizeof(struct ifla_vf_link_state)) + |
3b766cd8 | 924 | nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + |
7e75f74a | 925 | nla_total_size(0) + /* nest IFLA_VF_STATS */ |
3b766cd8 | 926 | /* IFLA_VF_STATS_RX_PACKETS */ |
343a6d8e | 927 | nla_total_size_64bit(sizeof(__u64)) + |
3b766cd8 | 928 | /* IFLA_VF_STATS_TX_PACKETS */ |
343a6d8e | 929 | nla_total_size_64bit(sizeof(__u64)) + |
3b766cd8 | 930 | /* IFLA_VF_STATS_RX_BYTES */ |
343a6d8e | 931 | nla_total_size_64bit(sizeof(__u64)) + |
3b766cd8 | 932 | /* IFLA_VF_STATS_TX_BYTES */ |
343a6d8e | 933 | nla_total_size_64bit(sizeof(__u64)) + |
3b766cd8 | 934 | /* IFLA_VF_STATS_BROADCAST */ |
343a6d8e | 935 | nla_total_size_64bit(sizeof(__u64)) + |
3b766cd8 | 936 | /* IFLA_VF_STATS_MULTICAST */ |
343a6d8e | 937 | nla_total_size_64bit(sizeof(__u64)) + |
c5a9f6f0 EE |
938 | /* IFLA_VF_STATS_RX_DROPPED */ |
939 | nla_total_size_64bit(sizeof(__u64)) + | |
940 | /* IFLA_VF_STATS_TX_DROPPED */ | |
941 | nla_total_size_64bit(sizeof(__u64)) + | |
dd461d6a | 942 | nla_total_size(sizeof(struct ifla_vf_trust))); |
c02db8c6 CW |
943 | return size; |
944 | } else | |
ebc08a6f WM |
945 | return 0; |
946 | } | |
947 | ||
c53864fd DG |
948 | static size_t rtnl_port_size(const struct net_device *dev, |
949 | u32 ext_filter_mask) | |
57b61080 SF |
950 | { |
951 | size_t port_size = nla_total_size(4) /* PORT_VF */ | |
952 | + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ | |
57b61080 SF |
953 | + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ |
954 | + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ | |
955 | + nla_total_size(1) /* PROT_VDP_REQUEST */ | |
956 | + nla_total_size(2); /* PORT_VDP_RESPONSE */ | |
957 | size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); | |
958 | size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) | |
959 | + port_size; | |
960 | size_t port_self_size = nla_total_size(sizeof(struct nlattr)) | |
961 | + port_size; | |
962 | ||
c53864fd DG |
963 | if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || |
964 | !(ext_filter_mask & RTEXT_FILTER_VF)) | |
57b61080 SF |
965 | return 0; |
966 | if (dev_num_vf(dev->dev.parent)) | |
967 | return port_self_size + vf_ports_size + | |
968 | vf_port_size * dev_num_vf(dev->dev.parent); | |
969 | else | |
970 | return port_self_size; | |
971 | } | |
972 | ||
b5cdae32 | 973 | static size_t rtnl_xdp_size(void) |
d1fdd913 | 974 | { |
b3cfaa31 | 975 | size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ |
58038695 | 976 | nla_total_size(1) + /* XDP_ATTACHED */ |
a25717d2 | 977 | nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */ |
4f91da26 | 978 | nla_total_size(4); /* XDP_<mode>_PROG_ID */ |
d1fdd913 | 979 | |
b5cdae32 | 980 | return xdp_size; |
d1fdd913 BB |
981 | } |
982 | ||
115c9b81 GR |
983 | static noinline size_t if_nlmsg_size(const struct net_device *dev, |
984 | u32 ext_filter_mask) | |
339bf98f TG |
985 | { |
986 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
987 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
0b815a1a | 988 | + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ |
339bf98f | 989 | + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ |
270cb4d0 | 990 | + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) |
339bf98f | 991 | + nla_total_size(sizeof(struct rtnl_link_stats)) |
35c58459 | 992 | + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) |
339bf98f TG |
993 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
994 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ | |
995 | + nla_total_size(4) /* IFLA_TXQLEN */ | |
996 | + nla_total_size(4) /* IFLA_WEIGHT */ | |
997 | + nla_total_size(4) /* IFLA_MTU */ | |
998 | + nla_total_size(4) /* IFLA_LINK */ | |
999 | + nla_total_size(4) /* IFLA_MASTER */ | |
9a57247f | 1000 | + nla_total_size(1) /* IFLA_CARRIER */ |
edbc0bb3 | 1001 | + nla_total_size(4) /* IFLA_PROMISCUITY */ |
76ff5cc9 JP |
1002 | + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ |
1003 | + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ | |
6919756c TK |
1004 | + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ |
1005 | + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ | |
339bf98f | 1006 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
38f7b870 | 1007 | + nla_total_size(1) /* IFLA_LINKMODE */ |
2d3b479d | 1008 | + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ |
d37512a2 | 1009 | + nla_total_size(4) /* IFLA_LINK_NETNSID */ |
db833d40 | 1010 | + nla_total_size(4) /* IFLA_GROUP */ |
115c9b81 GR |
1011 | + nla_total_size(ext_filter_mask |
1012 | & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ | |
1013 | + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ | |
c53864fd | 1014 | + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ |
f8ff182c | 1015 | + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ |
b1974ed0 | 1016 | + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ |
82f28412 | 1017 | + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ |
88d6378b | 1018 | + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ |
c57c7a95 | 1019 | + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ |
b5cdae32 | 1020 | + rtnl_xdp_size() /* IFLA_XDP */ |
3d3ea5af | 1021 | + nla_total_size(4) /* IFLA_EVENT */ |
6621dd29 | 1022 | + nla_total_size(4) /* IFLA_NEW_NETNSID */ |
38e01b30 | 1023 | + nla_total_size(4) /* IFLA_NEW_IFINDEX */ |
03ac738d | 1024 | + nla_total_size(1) /* IFLA_PROTO_DOWN */ |
7e4a8d5a | 1025 | + nla_total_size(4) /* IFLA_TARGET_NETNSID */ |
b2d3bcfa DD |
1026 | + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */ |
1027 | + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */ | |
3e7a50ce SH |
1028 | + nla_total_size(4) /* IFLA_MIN_MTU */ |
1029 | + nla_total_size(4) /* IFLA_MAX_MTU */ | |
79e1ad14 | 1030 | + 0; |
339bf98f TG |
1031 | } |
1032 | ||
57b61080 SF |
1033 | static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) |
1034 | { | |
1035 | struct nlattr *vf_ports; | |
1036 | struct nlattr *vf_port; | |
1037 | int vf; | |
1038 | int err; | |
1039 | ||
ae0be8de | 1040 | vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS); |
57b61080 SF |
1041 | if (!vf_ports) |
1042 | return -EMSGSIZE; | |
1043 | ||
1044 | for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { | |
ae0be8de | 1045 | vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT); |
8ca94183 SF |
1046 | if (!vf_port) |
1047 | goto nla_put_failure; | |
a6574349 DM |
1048 | if (nla_put_u32(skb, IFLA_PORT_VF, vf)) |
1049 | goto nla_put_failure; | |
57b61080 | 1050 | err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); |
8ca94183 SF |
1051 | if (err == -EMSGSIZE) |
1052 | goto nla_put_failure; | |
57b61080 | 1053 | if (err) { |
57b61080 SF |
1054 | nla_nest_cancel(skb, vf_port); |
1055 | continue; | |
1056 | } | |
1057 | nla_nest_end(skb, vf_port); | |
1058 | } | |
1059 | ||
1060 | nla_nest_end(skb, vf_ports); | |
1061 | ||
1062 | return 0; | |
8ca94183 SF |
1063 | |
1064 | nla_put_failure: | |
1065 | nla_nest_cancel(skb, vf_ports); | |
1066 | return -EMSGSIZE; | |
57b61080 SF |
1067 | } |
1068 | ||
1069 | static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) | |
1070 | { | |
1071 | struct nlattr *port_self; | |
1072 | int err; | |
1073 | ||
ae0be8de | 1074 | port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF); |
57b61080 SF |
1075 | if (!port_self) |
1076 | return -EMSGSIZE; | |
1077 | ||
1078 | err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); | |
1079 | if (err) { | |
1080 | nla_nest_cancel(skb, port_self); | |
8ca94183 | 1081 | return (err == -EMSGSIZE) ? err : 0; |
57b61080 SF |
1082 | } |
1083 | ||
1084 | nla_nest_end(skb, port_self); | |
1085 | ||
1086 | return 0; | |
1087 | } | |
1088 | ||
c53864fd DG |
1089 | static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, |
1090 | u32 ext_filter_mask) | |
57b61080 SF |
1091 | { |
1092 | int err; | |
1093 | ||
c53864fd DG |
1094 | if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || |
1095 | !(ext_filter_mask & RTEXT_FILTER_VF)) | |
57b61080 SF |
1096 | return 0; |
1097 | ||
1098 | err = rtnl_port_self_fill(skb, dev); | |
1099 | if (err) | |
1100 | return err; | |
1101 | ||
1102 | if (dev_num_vf(dev->dev.parent)) { | |
1103 | err = rtnl_vf_ports_fill(skb, dev); | |
1104 | if (err) | |
1105 | return err; | |
1106 | } | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
66cae9ed JP |
1111 | static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) |
1112 | { | |
1113 | int err; | |
02637fce | 1114 | struct netdev_phys_item_id ppid; |
66cae9ed JP |
1115 | |
1116 | err = dev_get_phys_port_id(dev, &ppid); | |
1117 | if (err) { | |
1118 | if (err == -EOPNOTSUPP) | |
1119 | return 0; | |
1120 | return err; | |
1121 | } | |
1122 | ||
1123 | if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) | |
1124 | return -EMSGSIZE; | |
1125 | ||
1126 | return 0; | |
1127 | } | |
1128 | ||
db24a904 DA |
1129 | static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) |
1130 | { | |
1131 | char name[IFNAMSIZ]; | |
1132 | int err; | |
1133 | ||
1134 | err = dev_get_phys_port_name(dev, name, sizeof(name)); | |
1135 | if (err) { | |
1136 | if (err == -EOPNOTSUPP) | |
1137 | return 0; | |
1138 | return err; | |
1139 | } | |
1140 | ||
77ef033b | 1141 | if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name)) |
db24a904 DA |
1142 | return -EMSGSIZE; |
1143 | ||
1144 | return 0; | |
1145 | } | |
1146 | ||
82f28412 JP |
1147 | static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) |
1148 | { | |
bccb3025 | 1149 | struct netdev_phys_item_id ppid = { }; |
82f28412 | 1150 | int err; |
82f28412 | 1151 | |
bccb3025 | 1152 | err = dev_get_port_parent_id(dev, &ppid, false); |
82f28412 JP |
1153 | if (err) { |
1154 | if (err == -EOPNOTSUPP) | |
1155 | return 0; | |
1156 | return err; | |
1157 | } | |
1158 | ||
bccb3025 | 1159 | if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id)) |
82f28412 JP |
1160 | return -EMSGSIZE; |
1161 | ||
1162 | return 0; | |
1163 | } | |
1164 | ||
b22b941b HFS |
1165 | static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, |
1166 | struct net_device *dev) | |
1167 | { | |
550bce59 | 1168 | struct rtnl_link_stats64 *sp; |
b22b941b | 1169 | struct nlattr *attr; |
18402843 | 1170 | |
58414d32 ND |
1171 | attr = nla_reserve_64bit(skb, IFLA_STATS64, |
1172 | sizeof(struct rtnl_link_stats64), IFLA_PAD); | |
b22b941b HFS |
1173 | if (!attr) |
1174 | return -EMSGSIZE; | |
1175 | ||
550bce59 RP |
1176 | sp = nla_data(attr); |
1177 | dev_get_stats(dev, sp); | |
b22b941b | 1178 | |
550bce59 RP |
1179 | attr = nla_reserve(skb, IFLA_STATS, |
1180 | sizeof(struct rtnl_link_stats)); | |
b22b941b HFS |
1181 | if (!attr) |
1182 | return -EMSGSIZE; | |
1183 | ||
550bce59 | 1184 | copy_rtnl_link_stats(nla_data(attr), sp); |
b22b941b HFS |
1185 | |
1186 | return 0; | |
1187 | } | |
1188 | ||
1189 | static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, | |
1190 | struct net_device *dev, | |
1191 | int vfs_num, | |
1192 | struct nlattr *vfinfo) | |
1193 | { | |
1194 | struct ifla_vf_rss_query_en vf_rss_query_en; | |
79aab093 | 1195 | struct nlattr *vf, *vfstats, *vfvlanlist; |
b22b941b | 1196 | struct ifla_vf_link_state vf_linkstate; |
79aab093 | 1197 | struct ifla_vf_vlan_info vf_vlan_info; |
b22b941b HFS |
1198 | struct ifla_vf_spoofchk vf_spoofchk; |
1199 | struct ifla_vf_tx_rate vf_tx_rate; | |
1200 | struct ifla_vf_stats vf_stats; | |
1201 | struct ifla_vf_trust vf_trust; | |
1202 | struct ifla_vf_vlan vf_vlan; | |
1203 | struct ifla_vf_rate vf_rate; | |
b22b941b | 1204 | struct ifla_vf_mac vf_mac; |
75345f88 | 1205 | struct ifla_vf_broadcast vf_broadcast; |
b22b941b HFS |
1206 | struct ifla_vf_info ivi; |
1207 | ||
0eed9cf5 MY |
1208 | memset(&ivi, 0, sizeof(ivi)); |
1209 | ||
b22b941b HFS |
1210 | /* Not all SR-IOV capable drivers support the |
1211 | * spoofcheck and "RSS query enable" query. Preset to | |
1212 | * -1 so the user space tool can detect that the driver | |
1213 | * didn't report anything. | |
1214 | */ | |
1215 | ivi.spoofchk = -1; | |
1216 | ivi.rss_query_en = -1; | |
1217 | ivi.trusted = -1; | |
b22b941b HFS |
1218 | /* The default value for VF link state is "auto" |
1219 | * IFLA_VF_LINK_STATE_AUTO which equals zero | |
1220 | */ | |
1221 | ivi.linkstate = 0; | |
79aab093 MS |
1222 | /* VLAN Protocol by default is 802.1Q */ |
1223 | ivi.vlan_proto = htons(ETH_P_8021Q); | |
b22b941b HFS |
1224 | if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) |
1225 | return 0; | |
1226 | ||
775f4f05 DC |
1227 | memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); |
1228 | ||
b22b941b HFS |
1229 | vf_mac.vf = |
1230 | vf_vlan.vf = | |
79aab093 | 1231 | vf_vlan_info.vf = |
b22b941b HFS |
1232 | vf_rate.vf = |
1233 | vf_tx_rate.vf = | |
1234 | vf_spoofchk.vf = | |
1235 | vf_linkstate.vf = | |
1236 | vf_rss_query_en.vf = | |
1237 | vf_trust.vf = ivi.vf; | |
1238 | ||
1239 | memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); | |
75345f88 | 1240 | memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len); |
b22b941b HFS |
1241 | vf_vlan.vlan = ivi.vlan; |
1242 | vf_vlan.qos = ivi.qos; | |
79aab093 MS |
1243 | vf_vlan_info.vlan = ivi.vlan; |
1244 | vf_vlan_info.qos = ivi.qos; | |
1245 | vf_vlan_info.vlan_proto = ivi.vlan_proto; | |
b22b941b HFS |
1246 | vf_tx_rate.rate = ivi.max_tx_rate; |
1247 | vf_rate.min_tx_rate = ivi.min_tx_rate; | |
1248 | vf_rate.max_tx_rate = ivi.max_tx_rate; | |
1249 | vf_spoofchk.setting = ivi.spoofchk; | |
1250 | vf_linkstate.link_state = ivi.linkstate; | |
1251 | vf_rss_query_en.setting = ivi.rss_query_en; | |
1252 | vf_trust.setting = ivi.trusted; | |
ae0be8de | 1253 | vf = nla_nest_start_noflag(skb, IFLA_VF_INFO); |
79aab093 MS |
1254 | if (!vf) |
1255 | goto nla_put_vfinfo_failure; | |
b22b941b | 1256 | if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || |
75345f88 | 1257 | nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) || |
b22b941b HFS |
1258 | nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || |
1259 | nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), | |
1260 | &vf_rate) || | |
1261 | nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), | |
1262 | &vf_tx_rate) || | |
1263 | nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), | |
1264 | &vf_spoofchk) || | |
1265 | nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), | |
1266 | &vf_linkstate) || | |
1267 | nla_put(skb, IFLA_VF_RSS_QUERY_EN, | |
1268 | sizeof(vf_rss_query_en), | |
1269 | &vf_rss_query_en) || | |
1270 | nla_put(skb, IFLA_VF_TRUST, | |
1271 | sizeof(vf_trust), &vf_trust)) | |
79aab093 | 1272 | goto nla_put_vf_failure; |
ae0be8de | 1273 | vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST); |
79aab093 MS |
1274 | if (!vfvlanlist) |
1275 | goto nla_put_vf_failure; | |
1276 | if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), | |
1277 | &vf_vlan_info)) { | |
1278 | nla_nest_cancel(skb, vfvlanlist); | |
1279 | goto nla_put_vf_failure; | |
1280 | } | |
1281 | nla_nest_end(skb, vfvlanlist); | |
b22b941b HFS |
1282 | memset(&vf_stats, 0, sizeof(vf_stats)); |
1283 | if (dev->netdev_ops->ndo_get_vf_stats) | |
1284 | dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, | |
1285 | &vf_stats); | |
ae0be8de | 1286 | vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS); |
79aab093 MS |
1287 | if (!vfstats) |
1288 | goto nla_put_vf_failure; | |
343a6d8e ND |
1289 | if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, |
1290 | vf_stats.rx_packets, IFLA_VF_STATS_PAD) || | |
1291 | nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, | |
1292 | vf_stats.tx_packets, IFLA_VF_STATS_PAD) || | |
1293 | nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, | |
1294 | vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || | |
1295 | nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, | |
1296 | vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || | |
1297 | nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, | |
1298 | vf_stats.broadcast, IFLA_VF_STATS_PAD) || | |
1299 | nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, | |
c5a9f6f0 EE |
1300 | vf_stats.multicast, IFLA_VF_STATS_PAD) || |
1301 | nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED, | |
1302 | vf_stats.rx_dropped, IFLA_VF_STATS_PAD) || | |
1303 | nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED, | |
1304 | vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) { | |
79aab093 MS |
1305 | nla_nest_cancel(skb, vfstats); |
1306 | goto nla_put_vf_failure; | |
1307 | } | |
b22b941b HFS |
1308 | nla_nest_end(skb, vfstats); |
1309 | nla_nest_end(skb, vf); | |
1310 | return 0; | |
79aab093 MS |
1311 | |
1312 | nla_put_vf_failure: | |
1313 | nla_nest_cancel(skb, vf); | |
1314 | nla_put_vfinfo_failure: | |
1315 | nla_nest_cancel(skb, vfinfo); | |
1316 | return -EMSGSIZE; | |
b22b941b HFS |
1317 | } |
1318 | ||
250fc3df FW |
1319 | static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb, |
1320 | struct net_device *dev, | |
1321 | u32 ext_filter_mask) | |
1322 | { | |
1323 | struct nlattr *vfinfo; | |
1324 | int i, num_vfs; | |
1325 | ||
1326 | if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0)) | |
1327 | return 0; | |
1328 | ||
1329 | num_vfs = dev_num_vf(dev->dev.parent); | |
1330 | if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs)) | |
1331 | return -EMSGSIZE; | |
1332 | ||
1333 | if (!dev->netdev_ops->ndo_get_vf_config) | |
1334 | return 0; | |
1335 | ||
ae0be8de | 1336 | vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST); |
250fc3df FW |
1337 | if (!vfinfo) |
1338 | return -EMSGSIZE; | |
1339 | ||
1340 | for (i = 0; i < num_vfs; i++) { | |
1341 | if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) | |
1342 | return -EMSGSIZE; | |
1343 | } | |
1344 | ||
1345 | nla_nest_end(skb, vfinfo); | |
1346 | return 0; | |
1347 | } | |
1348 | ||
b22b941b HFS |
1349 | static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) |
1350 | { | |
5f8e4474 KL |
1351 | struct rtnl_link_ifmap map; |
1352 | ||
1353 | memset(&map, 0, sizeof(map)); | |
1354 | map.mem_start = dev->mem_start; | |
1355 | map.mem_end = dev->mem_end; | |
1356 | map.base_addr = dev->base_addr; | |
1357 | map.irq = dev->irq; | |
1358 | map.dma = dev->dma; | |
1359 | map.port = dev->if_port; | |
1360 | ||
270cb4d0 | 1361 | if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) |
b22b941b HFS |
1362 | return -EMSGSIZE; |
1363 | ||
1364 | return 0; | |
1365 | } | |
1366 | ||
a25717d2 | 1367 | static u32 rtnl_xdp_prog_skb(struct net_device *dev) |
d67b9cd2 | 1368 | { |
58038695 | 1369 | const struct bpf_prog *generic_xdp_prog; |
d67b9cd2 DB |
1370 | |
1371 | ASSERT_RTNL(); | |
1372 | ||
58038695 | 1373 | generic_xdp_prog = rtnl_dereference(dev->xdp_prog); |
a25717d2 JK |
1374 | if (!generic_xdp_prog) |
1375 | return 0; | |
1376 | return generic_xdp_prog->aux->id; | |
1377 | } | |
d67b9cd2 | 1378 | |
a25717d2 JK |
1379 | static u32 rtnl_xdp_prog_drv(struct net_device *dev) |
1380 | { | |
1381 | return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf, XDP_QUERY_PROG); | |
1382 | } | |
118b4aa2 | 1383 | |
a25717d2 JK |
1384 | static u32 rtnl_xdp_prog_hw(struct net_device *dev) |
1385 | { | |
1386 | return __dev_xdp_query(dev, dev->netdev_ops->ndo_bpf, | |
1387 | XDP_QUERY_PROG_HW); | |
1388 | } | |
1389 | ||
1390 | static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev, | |
1391 | u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr, | |
1392 | u32 (*get_prog_id)(struct net_device *dev)) | |
1393 | { | |
1394 | u32 curr_id; | |
1395 | int err; | |
1396 | ||
1397 | curr_id = get_prog_id(dev); | |
1398 | if (!curr_id) | |
1399 | return 0; | |
1400 | ||
1401 | *prog_id = curr_id; | |
1402 | err = nla_put_u32(skb, attr, curr_id); | |
1403 | if (err) | |
1404 | return err; | |
d67b9cd2 | 1405 | |
a25717d2 JK |
1406 | if (*mode != XDP_ATTACHED_NONE) |
1407 | *mode = XDP_ATTACHED_MULTI; | |
1408 | else | |
1409 | *mode = tgt_mode; | |
118b4aa2 | 1410 | |
a25717d2 | 1411 | return 0; |
d67b9cd2 DB |
1412 | } |
1413 | ||
d1fdd913 BB |
1414 | static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) |
1415 | { | |
d1fdd913 | 1416 | struct nlattr *xdp; |
58038695 | 1417 | u32 prog_id; |
d1fdd913 | 1418 | int err; |
4f91da26 | 1419 | u8 mode; |
d1fdd913 | 1420 | |
ae0be8de | 1421 | xdp = nla_nest_start_noflag(skb, IFLA_XDP); |
d1fdd913 BB |
1422 | if (!xdp) |
1423 | return -EMSGSIZE; | |
d67b9cd2 | 1424 | |
a25717d2 JK |
1425 | prog_id = 0; |
1426 | mode = XDP_ATTACHED_NONE; | |
202aabe8 JK |
1427 | err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB, |
1428 | IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb); | |
1429 | if (err) | |
a25717d2 | 1430 | goto err_cancel; |
202aabe8 JK |
1431 | err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV, |
1432 | IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv); | |
1433 | if (err) | |
a25717d2 | 1434 | goto err_cancel; |
202aabe8 JK |
1435 | err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW, |
1436 | IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw); | |
1437 | if (err) | |
a25717d2 JK |
1438 | goto err_cancel; |
1439 | ||
4f91da26 | 1440 | err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode); |
d1fdd913 BB |
1441 | if (err) |
1442 | goto err_cancel; | |
1443 | ||
a25717d2 | 1444 | if (prog_id && mode != XDP_ATTACHED_MULTI) { |
58038695 MKL |
1445 | err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id); |
1446 | if (err) | |
1447 | goto err_cancel; | |
1448 | } | |
1449 | ||
d1fdd913 BB |
1450 | nla_nest_end(skb, xdp); |
1451 | return 0; | |
1452 | ||
1453 | err_cancel: | |
1454 | nla_nest_cancel(skb, xdp); | |
1455 | return err; | |
1456 | } | |
1457 | ||
3d3ea5af VY |
1458 | static u32 rtnl_get_event(unsigned long event) |
1459 | { | |
1460 | u32 rtnl_event_type = IFLA_EVENT_NONE; | |
1461 | ||
1462 | switch (event) { | |
1463 | case NETDEV_REBOOT: | |
1464 | rtnl_event_type = IFLA_EVENT_REBOOT; | |
1465 | break; | |
1466 | case NETDEV_FEAT_CHANGE: | |
1467 | rtnl_event_type = IFLA_EVENT_FEATURES; | |
1468 | break; | |
1469 | case NETDEV_BONDING_FAILOVER: | |
1470 | rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER; | |
1471 | break; | |
1472 | case NETDEV_NOTIFY_PEERS: | |
1473 | rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS; | |
1474 | break; | |
1475 | case NETDEV_RESEND_IGMP: | |
1476 | rtnl_event_type = IFLA_EVENT_IGMP_RESEND; | |
1477 | break; | |
1478 | case NETDEV_CHANGEINFODATA: | |
1479 | rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS; | |
1480 | break; | |
1481 | default: | |
1482 | break; | |
1483 | } | |
1484 | ||
1485 | return rtnl_event_type; | |
1486 | } | |
1487 | ||
79110a04 FW |
1488 | static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev) |
1489 | { | |
1490 | const struct net_device *upper_dev; | |
1491 | int ret = 0; | |
1492 | ||
1493 | rcu_read_lock(); | |
1494 | ||
1495 | upper_dev = netdev_master_upper_dev_get_rcu(dev); | |
1496 | if (upper_dev) | |
1497 | ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex); | |
1498 | ||
1499 | rcu_read_unlock(); | |
1500 | return ret; | |
1501 | } | |
1502 | ||
feadc4b6 SD |
1503 | static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev, |
1504 | bool force) | |
79110a04 FW |
1505 | { |
1506 | int ifindex = dev_get_iflink(dev); | |
1507 | ||
feadc4b6 SD |
1508 | if (force || dev->ifindex != ifindex) |
1509 | return nla_put_u32(skb, IFLA_LINK, ifindex); | |
79110a04 | 1510 | |
feadc4b6 | 1511 | return 0; |
79110a04 FW |
1512 | } |
1513 | ||
6c557001 FW |
1514 | static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb, |
1515 | struct net_device *dev) | |
1516 | { | |
1517 | char buf[IFALIASZ]; | |
1518 | int ret; | |
1519 | ||
1520 | ret = dev_get_alias(dev, buf, sizeof(buf)); | |
1521 | return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0; | |
1522 | } | |
1523 | ||
b1e66b9a | 1524 | static int rtnl_fill_link_netnsid(struct sk_buff *skb, |
79e1ad14 JB |
1525 | const struct net_device *dev, |
1526 | struct net *src_net) | |
b1e66b9a | 1527 | { |
feadc4b6 SD |
1528 | bool put_iflink = false; |
1529 | ||
b1e66b9a FW |
1530 | if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) { |
1531 | struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); | |
1532 | ||
1533 | if (!net_eq(dev_net(dev), link_net)) { | |
79e1ad14 | 1534 | int id = peernet2id_alloc(src_net, link_net); |
b1e66b9a FW |
1535 | |
1536 | if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) | |
1537 | return -EMSGSIZE; | |
feadc4b6 SD |
1538 | |
1539 | put_iflink = true; | |
b1e66b9a FW |
1540 | } |
1541 | } | |
1542 | ||
feadc4b6 | 1543 | return nla_put_iflink(skb, dev, put_iflink); |
b1e66b9a FW |
1544 | } |
1545 | ||
070cbf5b FW |
1546 | static int rtnl_fill_link_af(struct sk_buff *skb, |
1547 | const struct net_device *dev, | |
1548 | u32 ext_filter_mask) | |
1549 | { | |
1550 | const struct rtnl_af_ops *af_ops; | |
1551 | struct nlattr *af_spec; | |
1552 | ||
ae0be8de | 1553 | af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC); |
070cbf5b FW |
1554 | if (!af_spec) |
1555 | return -EMSGSIZE; | |
1556 | ||
5fa85a09 | 1557 | list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { |
070cbf5b FW |
1558 | struct nlattr *af; |
1559 | int err; | |
1560 | ||
1561 | if (!af_ops->fill_link_af) | |
1562 | continue; | |
1563 | ||
ae0be8de | 1564 | af = nla_nest_start_noflag(skb, af_ops->family); |
070cbf5b FW |
1565 | if (!af) |
1566 | return -EMSGSIZE; | |
1567 | ||
1568 | err = af_ops->fill_link_af(skb, dev, ext_filter_mask); | |
1569 | /* | |
1570 | * Caller may return ENODATA to indicate that there | |
1571 | * was no data to be dumped. This is not an error, it | |
1572 | * means we should trim the attribute header and | |
1573 | * continue. | |
1574 | */ | |
1575 | if (err == -ENODATA) | |
1576 | nla_nest_cancel(skb, af); | |
1577 | else if (err < 0) | |
1578 | return -EMSGSIZE; | |
1579 | ||
1580 | nla_nest_end(skb, af); | |
1581 | } | |
1582 | ||
1583 | nla_nest_end(skb, af_spec); | |
1584 | return 0; | |
1585 | } | |
1586 | ||
79e1ad14 JB |
1587 | static int rtnl_fill_ifinfo(struct sk_buff *skb, |
1588 | struct net_device *dev, struct net *src_net, | |
575c3e2a | 1589 | int type, u32 pid, u32 seq, u32 change, |
3d3ea5af | 1590 | unsigned int flags, u32 ext_filter_mask, |
38e01b30 ND |
1591 | u32 event, int *new_nsid, int new_ifindex, |
1592 | int tgt_netnsid) | |
b60c5115 TG |
1593 | { |
1594 | struct ifinfomsg *ifm; | |
1595 | struct nlmsghdr *nlh; | |
1da177e4 | 1596 | |
2907c35f | 1597 | ASSERT_RTNL(); |
b60c5115 TG |
1598 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); |
1599 | if (nlh == NULL) | |
26932566 | 1600 | return -EMSGSIZE; |
1da177e4 | 1601 | |
b60c5115 TG |
1602 | ifm = nlmsg_data(nlh); |
1603 | ifm->ifi_family = AF_UNSPEC; | |
1604 | ifm->__ifi_pad = 0; | |
1605 | ifm->ifi_type = dev->type; | |
1606 | ifm->ifi_index = dev->ifindex; | |
1607 | ifm->ifi_flags = dev_get_flags(dev); | |
1608 | ifm->ifi_change = change; | |
1609 | ||
7e4a8d5a | 1610 | if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid)) |
79e1ad14 JB |
1611 | goto nla_put_failure; |
1612 | ||
a6574349 DM |
1613 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
1614 | nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || | |
1615 | nla_put_u8(skb, IFLA_OPERSTATE, | |
1616 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || | |
1617 | nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || | |
1618 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
3e7a50ce SH |
1619 | nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) || |
1620 | nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) || | |
a6574349 | 1621 | nla_put_u32(skb, IFLA_GROUP, dev->group) || |
edbc0bb3 | 1622 | nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || |
76ff5cc9 | 1623 | nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || |
c70ce028 ED |
1624 | nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || |
1625 | nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || | |
1d69c2b3 | 1626 | #ifdef CONFIG_RPS |
76ff5cc9 | 1627 | nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || |
1d69c2b3 | 1628 | #endif |
79110a04 | 1629 | put_master_ifindex(skb, dev) || |
9a57247f | 1630 | nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || |
a6574349 DM |
1631 | (dev->qdisc && |
1632 | nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || | |
6c557001 | 1633 | nla_put_ifalias(skb, dev) || |
2d3b479d | 1634 | nla_put_u32(skb, IFLA_CARRIER_CHANGES, |
b2d3bcfa DD |
1635 | atomic_read(&dev->carrier_up_count) + |
1636 | atomic_read(&dev->carrier_down_count)) || | |
1637 | nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down) || | |
1638 | nla_put_u32(skb, IFLA_CARRIER_UP_COUNT, | |
1639 | atomic_read(&dev->carrier_up_count)) || | |
1640 | nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT, | |
1641 | atomic_read(&dev->carrier_down_count))) | |
a6574349 | 1642 | goto nla_put_failure; |
0b815a1a | 1643 | |
3d3ea5af VY |
1644 | if (event != IFLA_EVENT_NONE) { |
1645 | if (nla_put_u32(skb, IFLA_EVENT, event)) | |
1646 | goto nla_put_failure; | |
1647 | } | |
1648 | ||
b22b941b HFS |
1649 | if (rtnl_fill_link_ifmap(skb, dev)) |
1650 | goto nla_put_failure; | |
1da177e4 LT |
1651 | |
1652 | if (dev->addr_len) { | |
a6574349 DM |
1653 | if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || |
1654 | nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) | |
1655 | goto nla_put_failure; | |
1da177e4 LT |
1656 | } |
1657 | ||
66cae9ed JP |
1658 | if (rtnl_phys_port_id_fill(skb, dev)) |
1659 | goto nla_put_failure; | |
1660 | ||
db24a904 DA |
1661 | if (rtnl_phys_port_name_fill(skb, dev)) |
1662 | goto nla_put_failure; | |
1663 | ||
82f28412 JP |
1664 | if (rtnl_phys_switch_id_fill(skb, dev)) |
1665 | goto nla_put_failure; | |
1666 | ||
b22b941b | 1667 | if (rtnl_fill_stats(skb, dev)) |
10708f37 | 1668 | goto nla_put_failure; |
10708f37 | 1669 | |
250fc3df | 1670 | if (rtnl_fill_vf(skb, dev, ext_filter_mask)) |
a6574349 | 1671 | goto nla_put_failure; |
57b61080 | 1672 | |
c53864fd | 1673 | if (rtnl_port_fill(skb, dev, ext_filter_mask)) |
57b61080 SF |
1674 | goto nla_put_failure; |
1675 | ||
d1fdd913 BB |
1676 | if (rtnl_xdp_fill(skb, dev)) |
1677 | goto nla_put_failure; | |
1678 | ||
ba7d49b1 | 1679 | if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { |
38f7b870 PM |
1680 | if (rtnl_link_fill(skb, dev) < 0) |
1681 | goto nla_put_failure; | |
1682 | } | |
1683 | ||
79e1ad14 | 1684 | if (rtnl_fill_link_netnsid(skb, dev, src_net)) |
b1e66b9a | 1685 | goto nla_put_failure; |
d37512a2 | 1686 | |
6621dd29 ND |
1687 | if (new_nsid && |
1688 | nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0) | |
1689 | goto nla_put_failure; | |
38e01b30 ND |
1690 | if (new_ifindex && |
1691 | nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0) | |
1692 | goto nla_put_failure; | |
1693 | ||
6621dd29 | 1694 | |
5fa85a09 | 1695 | rcu_read_lock(); |
070cbf5b | 1696 | if (rtnl_fill_link_af(skb, dev, ext_filter_mask)) |
5fa85a09 FW |
1697 | goto nla_put_failure_rcu; |
1698 | rcu_read_unlock(); | |
f8ff182c | 1699 | |
053c095a JB |
1700 | nlmsg_end(skb, nlh); |
1701 | return 0; | |
b60c5115 | 1702 | |
5fa85a09 FW |
1703 | nla_put_failure_rcu: |
1704 | rcu_read_unlock(); | |
b60c5115 | 1705 | nla_put_failure: |
26932566 PM |
1706 | nlmsg_cancel(skb, nlh); |
1707 | return -EMSGSIZE; | |
1da177e4 LT |
1708 | } |
1709 | ||
f7b12606 | 1710 | static const struct nla_policy ifla_policy[IFLA_MAX+1] = { |
5176f91e | 1711 | [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, |
38f7b870 PM |
1712 | [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, |
1713 | [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
5176f91e | 1714 | [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, |
da5e0494 | 1715 | [IFLA_MTU] = { .type = NLA_U32 }, |
76e87306 | 1716 | [IFLA_LINK] = { .type = NLA_U32 }, |
fbaec0ea | 1717 | [IFLA_MASTER] = { .type = NLA_U32 }, |
9a57247f | 1718 | [IFLA_CARRIER] = { .type = NLA_U8 }, |
da5e0494 TG |
1719 | [IFLA_TXQLEN] = { .type = NLA_U32 }, |
1720 | [IFLA_WEIGHT] = { .type = NLA_U32 }, | |
1721 | [IFLA_OPERSTATE] = { .type = NLA_U8 }, | |
1722 | [IFLA_LINKMODE] = { .type = NLA_U8 }, | |
76e87306 | 1723 | [IFLA_LINKINFO] = { .type = NLA_NESTED }, |
d8a5ec67 | 1724 | [IFLA_NET_NS_PID] = { .type = NLA_U32 }, |
f0630529 | 1725 | [IFLA_NET_NS_FD] = { .type = NLA_U32 }, |
2459b4c6 ND |
1726 | /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to |
1727 | * allow 0-length string (needed to remove an alias). | |
1728 | */ | |
1729 | [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 }, | |
c02db8c6 | 1730 | [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, |
57b61080 SF |
1731 | [IFLA_VF_PORTS] = { .type = NLA_NESTED }, |
1732 | [IFLA_PORT_SELF] = { .type = NLA_NESTED }, | |
f8ff182c | 1733 | [IFLA_AF_SPEC] = { .type = NLA_NESTED }, |
115c9b81 | 1734 | [IFLA_EXT_MASK] = { .type = NLA_U32 }, |
edbc0bb3 | 1735 | [IFLA_PROMISCUITY] = { .type = NLA_U32 }, |
76ff5cc9 JP |
1736 | [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, |
1737 | [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, | |
46e6b992 SH |
1738 | [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 }, |
1739 | [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 }, | |
02637fce | 1740 | [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, |
2d3b479d | 1741 | [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ |
82f28412 | 1742 | [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, |
317f4810 | 1743 | [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, |
88d6378b | 1744 | [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, |
d1fdd913 | 1745 | [IFLA_XDP] = { .type = NLA_NESTED }, |
3d3ea5af | 1746 | [IFLA_EVENT] = { .type = NLA_U32 }, |
db833d40 | 1747 | [IFLA_GROUP] = { .type = NLA_U32 }, |
7e4a8d5a | 1748 | [IFLA_TARGET_NETNSID] = { .type = NLA_S32 }, |
b2d3bcfa DD |
1749 | [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 }, |
1750 | [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 }, | |
3e7a50ce SH |
1751 | [IFLA_MIN_MTU] = { .type = NLA_U32 }, |
1752 | [IFLA_MAX_MTU] = { .type = NLA_U32 }, | |
da5e0494 TG |
1753 | }; |
1754 | ||
38f7b870 PM |
1755 | static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { |
1756 | [IFLA_INFO_KIND] = { .type = NLA_STRING }, | |
1757 | [IFLA_INFO_DATA] = { .type = NLA_NESTED }, | |
ba7d49b1 JP |
1758 | [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, |
1759 | [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, | |
38f7b870 PM |
1760 | }; |
1761 | ||
c02db8c6 | 1762 | static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { |
364d5716 | 1763 | [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, |
75345f88 | 1764 | [IFLA_VF_BROADCAST] = { .type = NLA_REJECT }, |
364d5716 | 1765 | [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, |
79aab093 | 1766 | [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, |
364d5716 DB |
1767 | [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, |
1768 | [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, | |
1769 | [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, | |
1770 | [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, | |
01a3d796 | 1771 | [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, |
3b766cd8 | 1772 | [IFLA_VF_STATS] = { .type = NLA_NESTED }, |
dd461d6a | 1773 | [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, |
cc8e27cc EC |
1774 | [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, |
1775 | [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, | |
3b766cd8 EBE |
1776 | }; |
1777 | ||
57b61080 SF |
1778 | static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { |
1779 | [IFLA_PORT_VF] = { .type = NLA_U32 }, | |
1780 | [IFLA_PORT_PROFILE] = { .type = NLA_STRING, | |
1781 | .len = PORT_PROFILE_MAX }, | |
57b61080 SF |
1782 | [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, |
1783 | .len = PORT_UUID_MAX }, | |
1784 | [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, | |
1785 | .len = PORT_UUID_MAX }, | |
1786 | [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, | |
1787 | [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, | |
025331df DB |
1788 | |
1789 | /* Unused, but we need to keep it here since user space could | |
1790 | * fill it. It's also broken with regard to NLA_BINARY use in | |
1791 | * combination with structs. | |
1792 | */ | |
1793 | [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, | |
1794 | .len = sizeof(struct ifla_port_vsi) }, | |
57b61080 SF |
1795 | }; |
1796 | ||
d1fdd913 BB |
1797 | static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { |
1798 | [IFLA_XDP_FD] = { .type = NLA_S32 }, | |
1799 | [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, | |
85de8576 | 1800 | [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, |
58038695 | 1801 | [IFLA_XDP_PROG_ID] = { .type = NLA_U32 }, |
d1fdd913 BB |
1802 | }; |
1803 | ||
dc599f76 DA |
1804 | static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) |
1805 | { | |
1806 | const struct rtnl_link_ops *ops = NULL; | |
1807 | struct nlattr *linfo[IFLA_INFO_MAX + 1]; | |
1808 | ||
8cb08174 | 1809 | if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0) |
dc599f76 DA |
1810 | return NULL; |
1811 | ||
1812 | if (linfo[IFLA_INFO_KIND]) { | |
1813 | char kind[MODULE_NAME_LEN]; | |
1814 | ||
1815 | nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); | |
1816 | ops = rtnl_link_ops_get(kind); | |
1817 | } | |
1818 | ||
1819 | return ops; | |
1820 | } | |
1821 | ||
1822 | static bool link_master_filtered(struct net_device *dev, int master_idx) | |
1823 | { | |
1824 | struct net_device *master; | |
1825 | ||
1826 | if (!master_idx) | |
1827 | return false; | |
1828 | ||
1829 | master = netdev_master_upper_dev_get(dev); | |
1830 | if (!master || master->ifindex != master_idx) | |
1831 | return true; | |
1832 | ||
1833 | return false; | |
1834 | } | |
1835 | ||
1836 | static bool link_kind_filtered(const struct net_device *dev, | |
1837 | const struct rtnl_link_ops *kind_ops) | |
1838 | { | |
1839 | if (kind_ops && dev->rtnl_link_ops != kind_ops) | |
1840 | return true; | |
1841 | ||
1842 | return false; | |
1843 | } | |
1844 | ||
1845 | static bool link_dump_filtered(struct net_device *dev, | |
1846 | int master_idx, | |
1847 | const struct rtnl_link_ops *kind_ops) | |
1848 | { | |
1849 | if (link_master_filtered(dev, master_idx) || | |
1850 | link_kind_filtered(dev, kind_ops)) | |
1851 | return true; | |
1852 | ||
1853 | return false; | |
1854 | } | |
1855 | ||
c383edc4 CB |
1856 | /** |
1857 | * rtnl_get_net_ns_capable - Get netns if sufficiently privileged. | |
1858 | * @sk: netlink socket | |
1859 | * @netnsid: network namespace identifier | |
1860 | * | |
1861 | * Returns the network namespace identified by netnsid on success or an error | |
1862 | * pointer on failure. | |
1863 | */ | |
1864 | struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid) | |
79e1ad14 JB |
1865 | { |
1866 | struct net *net; | |
1867 | ||
f428fe4a | 1868 | net = get_net_ns_by_id(sock_net(sk), netnsid); |
79e1ad14 JB |
1869 | if (!net) |
1870 | return ERR_PTR(-EINVAL); | |
1871 | ||
1872 | /* For now, the caller is required to have CAP_NET_ADMIN in | |
1873 | * the user namespace owning the target net ns. | |
1874 | */ | |
f428fe4a | 1875 | if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) { |
79e1ad14 JB |
1876 | put_net(net); |
1877 | return ERR_PTR(-EACCES); | |
1878 | } | |
1879 | return net; | |
1880 | } | |
c383edc4 | 1881 | EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable); |
79e1ad14 | 1882 | |
905cf0ab DA |
1883 | static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh, |
1884 | bool strict_check, struct nlattr **tb, | |
1885 | struct netlink_ext_ack *extack) | |
1886 | { | |
1887 | int hdrlen; | |
1888 | ||
1889 | if (strict_check) { | |
1890 | struct ifinfomsg *ifm; | |
1891 | ||
1892 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { | |
1893 | NL_SET_ERR_MSG(extack, "Invalid header for link dump"); | |
1894 | return -EINVAL; | |
1895 | } | |
1896 | ||
1897 | ifm = nlmsg_data(nlh); | |
1898 | if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || | |
1899 | ifm->ifi_change) { | |
1900 | NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request"); | |
1901 | return -EINVAL; | |
1902 | } | |
1903 | if (ifm->ifi_index) { | |
1904 | NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps"); | |
1905 | return -EINVAL; | |
1906 | } | |
1907 | ||
8cb08174 JB |
1908 | return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, |
1909 | IFLA_MAX, ifla_policy, | |
1910 | extack); | |
905cf0ab DA |
1911 | } |
1912 | ||
1913 | /* A hack to preserve kernel<->userspace interface. | |
1914 | * The correct header is ifinfomsg. It is consistent with rtnl_getlink. | |
1915 | * However, before Linux v3.9 the code here assumed rtgenmsg and that's | |
1916 | * what iproute2 < v3.9.0 used. | |
1917 | * We can detect the old iproute2. Even including the IFLA_EXT_MASK | |
1918 | * attribute, its netlink message is shorter than struct ifinfomsg. | |
1919 | */ | |
1920 | hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? | |
1921 | sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); | |
1922 | ||
8cb08174 JB |
1923 | return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, |
1924 | extack); | |
905cf0ab DA |
1925 | } |
1926 | ||
f7b12606 JP |
1927 | static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
1928 | { | |
905cf0ab DA |
1929 | struct netlink_ext_ack *extack = cb->extack; |
1930 | const struct nlmsghdr *nlh = cb->nlh; | |
f7b12606 | 1931 | struct net *net = sock_net(skb->sk); |
79e1ad14 | 1932 | struct net *tgt_net = net; |
f7b12606 JP |
1933 | int h, s_h; |
1934 | int idx = 0, s_idx; | |
1935 | struct net_device *dev; | |
1936 | struct hlist_head *head; | |
1937 | struct nlattr *tb[IFLA_MAX+1]; | |
1938 | u32 ext_filter_mask = 0; | |
dc599f76 DA |
1939 | const struct rtnl_link_ops *kind_ops = NULL; |
1940 | unsigned int flags = NLM_F_MULTI; | |
1941 | int master_idx = 0; | |
79e1ad14 | 1942 | int netnsid = -1; |
905cf0ab | 1943 | int err, i; |
f7b12606 JP |
1944 | |
1945 | s_h = cb->args[0]; | |
1946 | s_idx = cb->args[1]; | |
1947 | ||
905cf0ab DA |
1948 | err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack); |
1949 | if (err < 0) { | |
1950 | if (cb->strict_check) | |
1951 | return err; | |
1952 | ||
1953 | goto walk_entries; | |
1954 | } | |
1955 | ||
1956 | for (i = 0; i <= IFLA_MAX; ++i) { | |
1957 | if (!tb[i]) | |
1958 | continue; | |
e5eca6d4 | 1959 | |
905cf0ab DA |
1960 | /* new attributes should only be added with strict checking */ |
1961 | switch (i) { | |
1962 | case IFLA_TARGET_NETNSID: | |
1963 | netnsid = nla_get_s32(tb[i]); | |
c383edc4 | 1964 | tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid); |
905cf0ab DA |
1965 | if (IS_ERR(tgt_net)) { |
1966 | NL_SET_ERR_MSG(extack, "Invalid target network namespace id"); | |
893626d6 | 1967 | return PTR_ERR(tgt_net); |
905cf0ab DA |
1968 | } |
1969 | break; | |
1970 | case IFLA_EXT_MASK: | |
1971 | ext_filter_mask = nla_get_u32(tb[i]); | |
1972 | break; | |
1973 | case IFLA_MASTER: | |
1974 | master_idx = nla_get_u32(tb[i]); | |
1975 | break; | |
1976 | case IFLA_LINKINFO: | |
1977 | kind_ops = linkinfo_to_kind_ops(tb[i]); | |
1978 | break; | |
1979 | default: | |
1980 | if (cb->strict_check) { | |
1981 | NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request"); | |
1982 | return -EINVAL; | |
1983 | } | |
79e1ad14 | 1984 | } |
f7b12606 JP |
1985 | } |
1986 | ||
905cf0ab DA |
1987 | if (master_idx || kind_ops) |
1988 | flags |= NLM_F_DUMP_FILTERED; | |
1989 | ||
1990 | walk_entries: | |
f7b12606 JP |
1991 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
1992 | idx = 0; | |
79e1ad14 | 1993 | head = &tgt_net->dev_index_head[h]; |
cac5e65e | 1994 | hlist_for_each_entry(dev, head, index_hlist) { |
dc599f76 | 1995 | if (link_dump_filtered(dev, master_idx, kind_ops)) |
3f0ae05d | 1996 | goto cont; |
f7b12606 JP |
1997 | if (idx < s_idx) |
1998 | goto cont; | |
79e1ad14 JB |
1999 | err = rtnl_fill_ifinfo(skb, dev, net, |
2000 | RTM_NEWLINK, | |
973462bb | 2001 | NETLINK_CB(cb->skb).portid, |
905cf0ab | 2002 | nlh->nlmsg_seq, 0, flags, |
38e01b30 | 2003 | ext_filter_mask, 0, NULL, 0, |
79e1ad14 | 2004 | netnsid); |
973462bb | 2005 | |
f6c5775f DA |
2006 | if (err < 0) { |
2007 | if (likely(skb->len)) | |
2008 | goto out; | |
2009 | ||
2010 | goto out_err; | |
2011 | } | |
f7b12606 JP |
2012 | cont: |
2013 | idx++; | |
2014 | } | |
2015 | } | |
2016 | out: | |
f6c5775f DA |
2017 | err = skb->len; |
2018 | out_err: | |
f7b12606 JP |
2019 | cb->args[1] = idx; |
2020 | cb->args[0] = h; | |
d0225784 JS |
2021 | cb->seq = net->dev_base_seq; |
2022 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); | |
79e1ad14 JB |
2023 | if (netnsid >= 0) |
2024 | put_net(tgt_net); | |
f7b12606 | 2025 | |
f6c5775f | 2026 | return err; |
f7b12606 JP |
2027 | } |
2028 | ||
fceb6435 JB |
2029 | int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, |
2030 | struct netlink_ext_ack *exterr) | |
f7b12606 | 2031 | { |
8cb08174 JB |
2032 | return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy, |
2033 | exterr); | |
f7b12606 JP |
2034 | } |
2035 | EXPORT_SYMBOL(rtnl_nla_parse_ifla); | |
2036 | ||
81adee47 EB |
2037 | struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) |
2038 | { | |
2039 | struct net *net; | |
2040 | /* Examine the link attributes and figure out which | |
2041 | * network namespace we are talking about. | |
2042 | */ | |
2043 | if (tb[IFLA_NET_NS_PID]) | |
2044 | net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); | |
f0630529 EB |
2045 | else if (tb[IFLA_NET_NS_FD]) |
2046 | net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); | |
81adee47 EB |
2047 | else |
2048 | net = get_net(src_net); | |
2049 | return net; | |
2050 | } | |
2051 | EXPORT_SYMBOL(rtnl_link_get_net); | |
2052 | ||
7c4f63ba CB |
2053 | /* Figure out which network namespace we are talking about by |
2054 | * examining the link attributes in the following order: | |
2055 | * | |
2056 | * 1. IFLA_NET_NS_PID | |
2057 | * 2. IFLA_NET_NS_FD | |
7e4a8d5a | 2058 | * 3. IFLA_TARGET_NETNSID |
7c4f63ba CB |
2059 | */ |
2060 | static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net, | |
2061 | struct nlattr *tb[]) | |
2062 | { | |
2063 | struct net *net; | |
2064 | ||
2065 | if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) | |
2066 | return rtnl_link_get_net(src_net, tb); | |
2067 | ||
7e4a8d5a | 2068 | if (!tb[IFLA_TARGET_NETNSID]) |
7c4f63ba CB |
2069 | return get_net(src_net); |
2070 | ||
7e4a8d5a | 2071 | net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID])); |
7c4f63ba CB |
2072 | if (!net) |
2073 | return ERR_PTR(-EINVAL); | |
2074 | ||
2075 | return net; | |
2076 | } | |
2077 | ||
2078 | static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb, | |
2079 | struct net *src_net, | |
2080 | struct nlattr *tb[], int cap) | |
2081 | { | |
2082 | struct net *net; | |
2083 | ||
2084 | net = rtnl_link_get_net_by_nlattr(src_net, tb); | |
2085 | if (IS_ERR(net)) | |
2086 | return net; | |
2087 | ||
2088 | if (!netlink_ns_capable(skb, net->user_ns, cap)) { | |
2089 | put_net(net); | |
2090 | return ERR_PTR(-EPERM); | |
2091 | } | |
2092 | ||
2093 | return net; | |
2094 | } | |
2095 | ||
4ff66cae CB |
2096 | /* Verify that rtnetlink requests do not pass additional properties |
2097 | * potentially referring to different network namespaces. | |
2098 | */ | |
2099 | static int rtnl_ensure_unique_netns(struct nlattr *tb[], | |
2100 | struct netlink_ext_ack *extack, | |
2101 | bool netns_id_only) | |
2102 | { | |
2103 | ||
2104 | if (netns_id_only) { | |
2105 | if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD]) | |
2106 | return 0; | |
2107 | ||
2108 | NL_SET_ERR_MSG(extack, "specified netns attribute not supported"); | |
2109 | return -EOPNOTSUPP; | |
2110 | } | |
2111 | ||
7e4a8d5a | 2112 | if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])) |
4ff66cae CB |
2113 | goto invalid_attr; |
2114 | ||
7e4a8d5a | 2115 | if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD])) |
4ff66cae CB |
2116 | goto invalid_attr; |
2117 | ||
7e4a8d5a | 2118 | if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID])) |
4ff66cae CB |
2119 | goto invalid_attr; |
2120 | ||
2121 | return 0; | |
2122 | ||
2123 | invalid_attr: | |
2124 | NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified"); | |
2125 | return -EINVAL; | |
2126 | } | |
2127 | ||
1840bb13 TG |
2128 | static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) |
2129 | { | |
2130 | if (dev) { | |
2131 | if (tb[IFLA_ADDRESS] && | |
2132 | nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) | |
2133 | return -EINVAL; | |
2134 | ||
2135 | if (tb[IFLA_BROADCAST] && | |
2136 | nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) | |
2137 | return -EINVAL; | |
2138 | } | |
2139 | ||
cf7afbfe TG |
2140 | if (tb[IFLA_AF_SPEC]) { |
2141 | struct nlattr *af; | |
2142 | int rem, err; | |
2143 | ||
2144 | nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { | |
2145 | const struct rtnl_af_ops *af_ops; | |
2146 | ||
5fa85a09 FW |
2147 | rcu_read_lock(); |
2148 | af_ops = rtnl_af_lookup(nla_type(af)); | |
2149 | if (!af_ops) { | |
2150 | rcu_read_unlock(); | |
cf7afbfe | 2151 | return -EAFNOSUPPORT; |
5fa85a09 | 2152 | } |
cf7afbfe | 2153 | |
5fa85a09 FW |
2154 | if (!af_ops->set_link_af) { |
2155 | rcu_read_unlock(); | |
cf7afbfe | 2156 | return -EOPNOTSUPP; |
5fa85a09 | 2157 | } |
cf7afbfe TG |
2158 | |
2159 | if (af_ops->validate_link_af) { | |
6d3a9a68 | 2160 | err = af_ops->validate_link_af(dev, af); |
5fa85a09 FW |
2161 | if (err < 0) { |
2162 | rcu_read_unlock(); | |
cf7afbfe | 2163 | return err; |
5fa85a09 | 2164 | } |
cf7afbfe | 2165 | } |
5fa85a09 FW |
2166 | |
2167 | rcu_read_unlock(); | |
cf7afbfe TG |
2168 | } |
2169 | } | |
2170 | ||
1840bb13 TG |
2171 | return 0; |
2172 | } | |
2173 | ||
cc8e27cc EC |
2174 | static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, |
2175 | int guid_type) | |
2176 | { | |
2177 | const struct net_device_ops *ops = dev->netdev_ops; | |
2178 | ||
2179 | return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); | |
2180 | } | |
2181 | ||
2182 | static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) | |
2183 | { | |
2184 | if (dev->type != ARPHRD_INFINIBAND) | |
2185 | return -EOPNOTSUPP; | |
2186 | ||
2187 | return handle_infiniband_guid(dev, ivt, guid_type); | |
2188 | } | |
2189 | ||
4f7d2cdf | 2190 | static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) |
c02db8c6 | 2191 | { |
c02db8c6 | 2192 | const struct net_device_ops *ops = dev->netdev_ops; |
4f7d2cdf | 2193 | int err = -EINVAL; |
c02db8c6 | 2194 | |
4f7d2cdf DB |
2195 | if (tb[IFLA_VF_MAC]) { |
2196 | struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); | |
01a3d796 | 2197 | |
4f7d2cdf DB |
2198 | err = -EOPNOTSUPP; |
2199 | if (ops->ndo_set_vf_mac) | |
2200 | err = ops->ndo_set_vf_mac(dev, ivm->vf, | |
2201 | ivm->mac); | |
2202 | if (err < 0) | |
2203 | return err; | |
2204 | } | |
2205 | ||
2206 | if (tb[IFLA_VF_VLAN]) { | |
2207 | struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); | |
2208 | ||
2209 | err = -EOPNOTSUPP; | |
2210 | if (ops->ndo_set_vf_vlan) | |
2211 | err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, | |
79aab093 MS |
2212 | ivv->qos, |
2213 | htons(ETH_P_8021Q)); | |
2214 | if (err < 0) | |
2215 | return err; | |
2216 | } | |
2217 | ||
2218 | if (tb[IFLA_VF_VLAN_LIST]) { | |
2219 | struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; | |
2220 | struct nlattr *attr; | |
2221 | int rem, len = 0; | |
2222 | ||
2223 | err = -EOPNOTSUPP; | |
2224 | if (!ops->ndo_set_vf_vlan) | |
2225 | return err; | |
2226 | ||
2227 | nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { | |
2228 | if (nla_type(attr) != IFLA_VF_VLAN_INFO || | |
2229 | nla_len(attr) < NLA_HDRLEN) { | |
2230 | return -EINVAL; | |
2231 | } | |
2232 | if (len >= MAX_VLAN_LIST_LEN) | |
2233 | return -EOPNOTSUPP; | |
2234 | ivvl[len] = nla_data(attr); | |
2235 | ||
2236 | len++; | |
2237 | } | |
fa34cd94 AB |
2238 | if (len == 0) |
2239 | return -EINVAL; | |
2240 | ||
79aab093 MS |
2241 | err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, |
2242 | ivvl[0]->qos, ivvl[0]->vlan_proto); | |
4f7d2cdf DB |
2243 | if (err < 0) |
2244 | return err; | |
c02db8c6 | 2245 | } |
4f7d2cdf DB |
2246 | |
2247 | if (tb[IFLA_VF_TX_RATE]) { | |
2248 | struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); | |
2249 | struct ifla_vf_info ivf; | |
2250 | ||
2251 | err = -EOPNOTSUPP; | |
2252 | if (ops->ndo_get_vf_config) | |
2253 | err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); | |
2254 | if (err < 0) | |
2255 | return err; | |
2256 | ||
2257 | err = -EOPNOTSUPP; | |
2258 | if (ops->ndo_set_vf_rate) | |
2259 | err = ops->ndo_set_vf_rate(dev, ivt->vf, | |
2260 | ivf.min_tx_rate, | |
2261 | ivt->rate); | |
2262 | if (err < 0) | |
2263 | return err; | |
2264 | } | |
2265 | ||
2266 | if (tb[IFLA_VF_RATE]) { | |
2267 | struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); | |
2268 | ||
2269 | err = -EOPNOTSUPP; | |
2270 | if (ops->ndo_set_vf_rate) | |
2271 | err = ops->ndo_set_vf_rate(dev, ivt->vf, | |
2272 | ivt->min_tx_rate, | |
2273 | ivt->max_tx_rate); | |
2274 | if (err < 0) | |
2275 | return err; | |
2276 | } | |
2277 | ||
2278 | if (tb[IFLA_VF_SPOOFCHK]) { | |
2279 | struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); | |
2280 | ||
2281 | err = -EOPNOTSUPP; | |
2282 | if (ops->ndo_set_vf_spoofchk) | |
2283 | err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, | |
2284 | ivs->setting); | |
2285 | if (err < 0) | |
2286 | return err; | |
2287 | } | |
2288 | ||
2289 | if (tb[IFLA_VF_LINK_STATE]) { | |
2290 | struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); | |
2291 | ||
2292 | err = -EOPNOTSUPP; | |
2293 | if (ops->ndo_set_vf_link_state) | |
2294 | err = ops->ndo_set_vf_link_state(dev, ivl->vf, | |
2295 | ivl->link_state); | |
2296 | if (err < 0) | |
2297 | return err; | |
2298 | } | |
2299 | ||
2300 | if (tb[IFLA_VF_RSS_QUERY_EN]) { | |
2301 | struct ifla_vf_rss_query_en *ivrssq_en; | |
2302 | ||
2303 | err = -EOPNOTSUPP; | |
2304 | ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); | |
2305 | if (ops->ndo_set_vf_rss_query_en) | |
2306 | err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, | |
2307 | ivrssq_en->setting); | |
2308 | if (err < 0) | |
2309 | return err; | |
2310 | } | |
2311 | ||
dd461d6a HS |
2312 | if (tb[IFLA_VF_TRUST]) { |
2313 | struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); | |
2314 | ||
2315 | err = -EOPNOTSUPP; | |
2316 | if (ops->ndo_set_vf_trust) | |
2317 | err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); | |
2318 | if (err < 0) | |
2319 | return err; | |
2320 | } | |
2321 | ||
cc8e27cc EC |
2322 | if (tb[IFLA_VF_IB_NODE_GUID]) { |
2323 | struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); | |
2324 | ||
2325 | if (!ops->ndo_set_vf_guid) | |
2326 | return -EOPNOTSUPP; | |
2327 | ||
2328 | return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); | |
2329 | } | |
2330 | ||
2331 | if (tb[IFLA_VF_IB_PORT_GUID]) { | |
2332 | struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); | |
2333 | ||
2334 | if (!ops->ndo_set_vf_guid) | |
2335 | return -EOPNOTSUPP; | |
2336 | ||
2337 | return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); | |
2338 | } | |
2339 | ||
c02db8c6 CW |
2340 | return err; |
2341 | } | |
2342 | ||
33eaf2a6 DA |
2343 | static int do_set_master(struct net_device *dev, int ifindex, |
2344 | struct netlink_ext_ack *extack) | |
fbaec0ea | 2345 | { |
898e5061 | 2346 | struct net_device *upper_dev = netdev_master_upper_dev_get(dev); |
fbaec0ea JP |
2347 | const struct net_device_ops *ops; |
2348 | int err; | |
2349 | ||
898e5061 JP |
2350 | if (upper_dev) { |
2351 | if (upper_dev->ifindex == ifindex) | |
fbaec0ea | 2352 | return 0; |
898e5061 | 2353 | ops = upper_dev->netdev_ops; |
fbaec0ea | 2354 | if (ops->ndo_del_slave) { |
898e5061 | 2355 | err = ops->ndo_del_slave(upper_dev, dev); |
fbaec0ea JP |
2356 | if (err) |
2357 | return err; | |
2358 | } else { | |
2359 | return -EOPNOTSUPP; | |
2360 | } | |
2361 | } | |
2362 | ||
2363 | if (ifindex) { | |
898e5061 JP |
2364 | upper_dev = __dev_get_by_index(dev_net(dev), ifindex); |
2365 | if (!upper_dev) | |
fbaec0ea | 2366 | return -EINVAL; |
898e5061 | 2367 | ops = upper_dev->netdev_ops; |
fbaec0ea | 2368 | if (ops->ndo_add_slave) { |
33eaf2a6 | 2369 | err = ops->ndo_add_slave(upper_dev, dev, extack); |
fbaec0ea JP |
2370 | if (err) |
2371 | return err; | |
2372 | } else { | |
2373 | return -EOPNOTSUPP; | |
2374 | } | |
2375 | } | |
2376 | return 0; | |
2377 | } | |
2378 | ||
90c325e3 | 2379 | #define DO_SETLINK_MODIFIED 0x01 |
ba998906 ND |
2380 | /* notify flag means notify + modified. */ |
2381 | #define DO_SETLINK_NOTIFY 0x03 | |
90f62cf3 EB |
2382 | static int do_setlink(const struct sk_buff *skb, |
2383 | struct net_device *dev, struct ifinfomsg *ifm, | |
ddf9f970 | 2384 | struct netlink_ext_ack *extack, |
90c325e3 | 2385 | struct nlattr **tb, char *ifname, int status) |
1da177e4 | 2386 | { |
d314774c | 2387 | const struct net_device_ops *ops = dev->netdev_ops; |
0157f60c | 2388 | int err; |
1da177e4 | 2389 | |
644c7eeb ED |
2390 | err = validate_linkmsg(dev, tb); |
2391 | if (err < 0) | |
2392 | return err; | |
2393 | ||
7e4a8d5a | 2394 | if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) { |
7c4f63ba CB |
2395 | struct net *net = rtnl_link_get_net_capable(skb, dev_net(dev), |
2396 | tb, CAP_NET_ADMIN); | |
d8a5ec67 EB |
2397 | if (IS_ERR(net)) { |
2398 | err = PTR_ERR(net); | |
2399 | goto errout; | |
2400 | } | |
7c4f63ba | 2401 | |
d8a5ec67 EB |
2402 | err = dev_change_net_namespace(dev, net, ifname); |
2403 | put_net(net); | |
2404 | if (err) | |
2405 | goto errout; | |
90c325e3 | 2406 | status |= DO_SETLINK_MODIFIED; |
d8a5ec67 EB |
2407 | } |
2408 | ||
da5e0494 | 2409 | if (tb[IFLA_MAP]) { |
1da177e4 LT |
2410 | struct rtnl_link_ifmap *u_map; |
2411 | struct ifmap k_map; | |
2412 | ||
d314774c | 2413 | if (!ops->ndo_set_config) { |
1da177e4 | 2414 | err = -EOPNOTSUPP; |
0157f60c | 2415 | goto errout; |
1da177e4 LT |
2416 | } |
2417 | ||
2418 | if (!netif_device_present(dev)) { | |
2419 | err = -ENODEV; | |
0157f60c | 2420 | goto errout; |
1da177e4 | 2421 | } |
1da177e4 | 2422 | |
da5e0494 | 2423 | u_map = nla_data(tb[IFLA_MAP]); |
1da177e4 LT |
2424 | k_map.mem_start = (unsigned long) u_map->mem_start; |
2425 | k_map.mem_end = (unsigned long) u_map->mem_end; | |
2426 | k_map.base_addr = (unsigned short) u_map->base_addr; | |
2427 | k_map.irq = (unsigned char) u_map->irq; | |
2428 | k_map.dma = (unsigned char) u_map->dma; | |
2429 | k_map.port = (unsigned char) u_map->port; | |
2430 | ||
d314774c | 2431 | err = ops->ndo_set_config(dev, &k_map); |
da5e0494 | 2432 | if (err < 0) |
0157f60c | 2433 | goto errout; |
1da177e4 | 2434 | |
ba998906 | 2435 | status |= DO_SETLINK_NOTIFY; |
1da177e4 LT |
2436 | } |
2437 | ||
da5e0494 | 2438 | if (tb[IFLA_ADDRESS]) { |
70f8e78e DM |
2439 | struct sockaddr *sa; |
2440 | int len; | |
2441 | ||
153711f9 WC |
2442 | len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len, |
2443 | sizeof(*sa)); | |
70f8e78e DM |
2444 | sa = kmalloc(len, GFP_KERNEL); |
2445 | if (!sa) { | |
2446 | err = -ENOMEM; | |
0157f60c | 2447 | goto errout; |
70f8e78e DM |
2448 | } |
2449 | sa->sa_family = dev->type; | |
da5e0494 | 2450 | memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), |
70f8e78e | 2451 | dev->addr_len); |
3a37a963 | 2452 | err = dev_set_mac_address(dev, sa, extack); |
70f8e78e | 2453 | kfree(sa); |
1da177e4 | 2454 | if (err) |
0157f60c | 2455 | goto errout; |
90c325e3 | 2456 | status |= DO_SETLINK_MODIFIED; |
1da177e4 LT |
2457 | } |
2458 | ||
da5e0494 | 2459 | if (tb[IFLA_MTU]) { |
7a4c53be | 2460 | err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack); |
da5e0494 | 2461 | if (err < 0) |
0157f60c | 2462 | goto errout; |
90c325e3 | 2463 | status |= DO_SETLINK_MODIFIED; |
1da177e4 LT |
2464 | } |
2465 | ||
cbda10fa VD |
2466 | if (tb[IFLA_GROUP]) { |
2467 | dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); | |
ba998906 | 2468 | status |= DO_SETLINK_NOTIFY; |
cbda10fa VD |
2469 | } |
2470 | ||
da5e0494 TG |
2471 | /* |
2472 | * Interface selected by interface index but interface | |
2473 | * name provided implies that a name change has been | |
2474 | * requested. | |
2475 | */ | |
51055be8 | 2476 | if (ifm->ifi_index > 0 && ifname[0]) { |
da5e0494 TG |
2477 | err = dev_change_name(dev, ifname); |
2478 | if (err < 0) | |
0157f60c | 2479 | goto errout; |
90c325e3 | 2480 | status |= DO_SETLINK_MODIFIED; |
1da177e4 LT |
2481 | } |
2482 | ||
0b815a1a SH |
2483 | if (tb[IFLA_IFALIAS]) { |
2484 | err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), | |
2485 | nla_len(tb[IFLA_IFALIAS])); | |
2486 | if (err < 0) | |
2487 | goto errout; | |
ba998906 | 2488 | status |= DO_SETLINK_NOTIFY; |
0b815a1a SH |
2489 | } |
2490 | ||
da5e0494 TG |
2491 | if (tb[IFLA_BROADCAST]) { |
2492 | nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); | |
e7c3273e | 2493 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
1da177e4 LT |
2494 | } |
2495 | ||
83b496e9 | 2496 | if (ifm->ifi_flags || ifm->ifi_change) { |
567c5e13 PM |
2497 | err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm), |
2498 | extack); | |
5f9021cf JB |
2499 | if (err < 0) |
2500 | goto errout; | |
83b496e9 | 2501 | } |
1da177e4 | 2502 | |
fbaec0ea | 2503 | if (tb[IFLA_MASTER]) { |
33eaf2a6 | 2504 | err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); |
fbaec0ea JP |
2505 | if (err) |
2506 | goto errout; | |
90c325e3 | 2507 | status |= DO_SETLINK_MODIFIED; |
fbaec0ea JP |
2508 | } |
2509 | ||
9a57247f JP |
2510 | if (tb[IFLA_CARRIER]) { |
2511 | err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); | |
2512 | if (err) | |
2513 | goto errout; | |
90c325e3 | 2514 | status |= DO_SETLINK_MODIFIED; |
9a57247f JP |
2515 | } |
2516 | ||
5d1180fc | 2517 | if (tb[IFLA_TXQLEN]) { |
0cd29503 | 2518 | unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]); |
6a643ddb CW |
2519 | |
2520 | err = dev_change_tx_queue_len(dev, value); | |
2521 | if (err) | |
2522 | goto errout; | |
2523 | status |= DO_SETLINK_MODIFIED; | |
5d1180fc | 2524 | } |
b00055aa | 2525 | |
46e6b992 SH |
2526 | if (tb[IFLA_GSO_MAX_SIZE]) { |
2527 | u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]); | |
2528 | ||
2529 | if (max_size > GSO_MAX_SIZE) { | |
2530 | err = -EINVAL; | |
2531 | goto errout; | |
2532 | } | |
2533 | ||
2534 | if (dev->gso_max_size ^ max_size) { | |
2535 | netif_set_gso_max_size(dev, max_size); | |
2536 | status |= DO_SETLINK_MODIFIED; | |
2537 | } | |
2538 | } | |
2539 | ||
2540 | if (tb[IFLA_GSO_MAX_SEGS]) { | |
2541 | u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); | |
2542 | ||
2543 | if (max_segs > GSO_MAX_SEGS) { | |
2544 | err = -EINVAL; | |
2545 | goto errout; | |
2546 | } | |
2547 | ||
2548 | if (dev->gso_max_segs ^ max_segs) { | |
2549 | dev->gso_max_segs = max_segs; | |
2550 | status |= DO_SETLINK_MODIFIED; | |
2551 | } | |
2552 | } | |
2553 | ||
da5e0494 | 2554 | if (tb[IFLA_OPERSTATE]) |
93b2d4a2 | 2555 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); |
b00055aa | 2556 | |
da5e0494 | 2557 | if (tb[IFLA_LINKMODE]) { |
1889b0e7 ND |
2558 | unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); |
2559 | ||
93b2d4a2 | 2560 | write_lock_bh(&dev_base_lock); |
1889b0e7 | 2561 | if (dev->link_mode ^ value) |
ba998906 | 2562 | status |= DO_SETLINK_NOTIFY; |
1889b0e7 | 2563 | dev->link_mode = value; |
93b2d4a2 | 2564 | write_unlock_bh(&dev_base_lock); |
b00055aa SR |
2565 | } |
2566 | ||
c02db8c6 | 2567 | if (tb[IFLA_VFINFO_LIST]) { |
4f7d2cdf | 2568 | struct nlattr *vfinfo[IFLA_VF_MAX + 1]; |
c02db8c6 CW |
2569 | struct nlattr *attr; |
2570 | int rem; | |
4f7d2cdf | 2571 | |
c02db8c6 | 2572 | nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { |
4f7d2cdf DB |
2573 | if (nla_type(attr) != IFLA_VF_INFO || |
2574 | nla_len(attr) < NLA_HDRLEN) { | |
253683bb | 2575 | err = -EINVAL; |
c02db8c6 | 2576 | goto errout; |
253683bb | 2577 | } |
8cb08174 JB |
2578 | err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX, |
2579 | attr, | |
2580 | ifla_vf_policy, | |
2581 | NULL); | |
4f7d2cdf DB |
2582 | if (err < 0) |
2583 | goto errout; | |
2584 | err = do_setvfinfo(dev, vfinfo); | |
c02db8c6 CW |
2585 | if (err < 0) |
2586 | goto errout; | |
ba998906 | 2587 | status |= DO_SETLINK_NOTIFY; |
c02db8c6 | 2588 | } |
ebc08a6f | 2589 | } |
1da177e4 LT |
2590 | err = 0; |
2591 | ||
57b61080 SF |
2592 | if (tb[IFLA_VF_PORTS]) { |
2593 | struct nlattr *port[IFLA_PORT_MAX+1]; | |
2594 | struct nlattr *attr; | |
2595 | int vf; | |
2596 | int rem; | |
2597 | ||
2598 | err = -EOPNOTSUPP; | |
2599 | if (!ops->ndo_set_vf_port) | |
2600 | goto errout; | |
2601 | ||
2602 | nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { | |
035d210f DB |
2603 | if (nla_type(attr) != IFLA_VF_PORT || |
2604 | nla_len(attr) < NLA_HDRLEN) { | |
2605 | err = -EINVAL; | |
2606 | goto errout; | |
2607 | } | |
8cb08174 JB |
2608 | err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX, |
2609 | attr, | |
2610 | ifla_port_policy, | |
2611 | NULL); | |
57b61080 SF |
2612 | if (err < 0) |
2613 | goto errout; | |
2614 | if (!port[IFLA_PORT_VF]) { | |
2615 | err = -EOPNOTSUPP; | |
2616 | goto errout; | |
2617 | } | |
2618 | vf = nla_get_u32(port[IFLA_PORT_VF]); | |
2619 | err = ops->ndo_set_vf_port(dev, vf, port); | |
2620 | if (err < 0) | |
2621 | goto errout; | |
ba998906 | 2622 | status |= DO_SETLINK_NOTIFY; |
57b61080 SF |
2623 | } |
2624 | } | |
2625 | err = 0; | |
2626 | ||
2627 | if (tb[IFLA_PORT_SELF]) { | |
2628 | struct nlattr *port[IFLA_PORT_MAX+1]; | |
2629 | ||
8cb08174 JB |
2630 | err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX, |
2631 | tb[IFLA_PORT_SELF], | |
2632 | ifla_port_policy, NULL); | |
57b61080 SF |
2633 | if (err < 0) |
2634 | goto errout; | |
2635 | ||
2636 | err = -EOPNOTSUPP; | |
2637 | if (ops->ndo_set_vf_port) | |
2638 | err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); | |
2639 | if (err < 0) | |
2640 | goto errout; | |
ba998906 | 2641 | status |= DO_SETLINK_NOTIFY; |
57b61080 | 2642 | } |
f8ff182c TG |
2643 | |
2644 | if (tb[IFLA_AF_SPEC]) { | |
2645 | struct nlattr *af; | |
2646 | int rem; | |
2647 | ||
2648 | nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { | |
2649 | const struct rtnl_af_ops *af_ops; | |
2650 | ||
5fa85a09 FW |
2651 | rcu_read_lock(); |
2652 | ||
058c8d59 | 2653 | BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af)))); |
f8ff182c | 2654 | |
cf7afbfe | 2655 | err = af_ops->set_link_af(dev, af); |
5fa85a09 FW |
2656 | if (err < 0) { |
2657 | rcu_read_unlock(); | |
f8ff182c | 2658 | goto errout; |
5fa85a09 | 2659 | } |
f8ff182c | 2660 | |
5fa85a09 | 2661 | rcu_read_unlock(); |
ba998906 | 2662 | status |= DO_SETLINK_NOTIFY; |
f8ff182c TG |
2663 | } |
2664 | } | |
57b61080 SF |
2665 | err = 0; |
2666 | ||
88d6378b AK |
2667 | if (tb[IFLA_PROTO_DOWN]) { |
2668 | err = dev_change_proto_down(dev, | |
2669 | nla_get_u8(tb[IFLA_PROTO_DOWN])); | |
2670 | if (err) | |
2671 | goto errout; | |
2672 | status |= DO_SETLINK_NOTIFY; | |
2673 | } | |
2674 | ||
d1fdd913 BB |
2675 | if (tb[IFLA_XDP]) { |
2676 | struct nlattr *xdp[IFLA_XDP_MAX + 1]; | |
85de8576 | 2677 | u32 xdp_flags = 0; |
d1fdd913 | 2678 | |
8cb08174 JB |
2679 | err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX, |
2680 | tb[IFLA_XDP], | |
2681 | ifla_xdp_policy, NULL); | |
d1fdd913 BB |
2682 | if (err < 0) |
2683 | goto errout; | |
2684 | ||
58038695 | 2685 | if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) { |
262d8625 BB |
2686 | err = -EINVAL; |
2687 | goto errout; | |
2688 | } | |
85de8576 DB |
2689 | |
2690 | if (xdp[IFLA_XDP_FLAGS]) { | |
2691 | xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); | |
2692 | if (xdp_flags & ~XDP_FLAGS_MASK) { | |
2693 | err = -EINVAL; | |
2694 | goto errout; | |
2695 | } | |
ee5d032f | 2696 | if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) { |
0489df9a DB |
2697 | err = -EINVAL; |
2698 | goto errout; | |
2699 | } | |
85de8576 DB |
2700 | } |
2701 | ||
d1fdd913 | 2702 | if (xdp[IFLA_XDP_FD]) { |
ddf9f970 | 2703 | err = dev_change_xdp_fd(dev, extack, |
85de8576 DB |
2704 | nla_get_s32(xdp[IFLA_XDP_FD]), |
2705 | xdp_flags); | |
d1fdd913 BB |
2706 | if (err) |
2707 | goto errout; | |
2708 | status |= DO_SETLINK_NOTIFY; | |
2709 | } | |
2710 | } | |
2711 | ||
0157f60c | 2712 | errout: |
ba998906 | 2713 | if (status & DO_SETLINK_MODIFIED) { |
64ff90cc | 2714 | if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY) |
ba998906 ND |
2715 | netdev_state_change(dev); |
2716 | ||
2717 | if (err < 0) | |
2718 | 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", | |
2719 | dev->name); | |
2720 | } | |
da5e0494 | 2721 | |
0157f60c PM |
2722 | return err; |
2723 | } | |
1da177e4 | 2724 | |
c21ef3e3 DA |
2725 | static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
2726 | struct netlink_ext_ack *extack) | |
0157f60c | 2727 | { |
3b1e0a65 | 2728 | struct net *net = sock_net(skb->sk); |
0157f60c PM |
2729 | struct ifinfomsg *ifm; |
2730 | struct net_device *dev; | |
2731 | int err; | |
2732 | struct nlattr *tb[IFLA_MAX+1]; | |
2733 | char ifname[IFNAMSIZ]; | |
2734 | ||
8cb08174 JB |
2735 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, |
2736 | ifla_policy, extack); | |
0157f60c PM |
2737 | if (err < 0) |
2738 | goto errout; | |
2739 | ||
4ff66cae CB |
2740 | err = rtnl_ensure_unique_netns(tb, extack, false); |
2741 | if (err < 0) | |
2742 | goto errout; | |
2743 | ||
0157f60c PM |
2744 | if (tb[IFLA_IFNAME]) |
2745 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
2746 | else | |
2747 | ifname[0] = '\0'; | |
2748 | ||
2749 | err = -EINVAL; | |
2750 | ifm = nlmsg_data(nlh); | |
2751 | if (ifm->ifi_index > 0) | |
a3d12891 | 2752 | dev = __dev_get_by_index(net, ifm->ifi_index); |
0157f60c | 2753 | else if (tb[IFLA_IFNAME]) |
a3d12891 | 2754 | dev = __dev_get_by_name(net, ifname); |
0157f60c PM |
2755 | else |
2756 | goto errout; | |
2757 | ||
2758 | if (dev == NULL) { | |
2759 | err = -ENODEV; | |
2760 | goto errout; | |
2761 | } | |
2762 | ||
ddf9f970 | 2763 | err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0); |
da5e0494 | 2764 | errout: |
1da177e4 LT |
2765 | return err; |
2766 | } | |
2767 | ||
66400d54 WC |
2768 | static int rtnl_group_dellink(const struct net *net, int group) |
2769 | { | |
2770 | struct net_device *dev, *aux; | |
2771 | LIST_HEAD(list_kill); | |
2772 | bool found = false; | |
2773 | ||
2774 | if (!group) | |
2775 | return -EPERM; | |
2776 | ||
2777 | for_each_netdev(net, dev) { | |
2778 | if (dev->group == group) { | |
2779 | const struct rtnl_link_ops *ops; | |
2780 | ||
2781 | found = true; | |
2782 | ops = dev->rtnl_link_ops; | |
2783 | if (!ops || !ops->dellink) | |
2784 | return -EOPNOTSUPP; | |
2785 | } | |
2786 | } | |
2787 | ||
2788 | if (!found) | |
2789 | return -ENODEV; | |
2790 | ||
2791 | for_each_netdev_safe(net, dev, aux) { | |
2792 | if (dev->group == group) { | |
2793 | const struct rtnl_link_ops *ops; | |
2794 | ||
2795 | ops = dev->rtnl_link_ops; | |
2796 | ops->dellink(dev, &list_kill); | |
2797 | } | |
2798 | } | |
2799 | unregister_netdevice_many(&list_kill); | |
2800 | ||
2801 | return 0; | |
2802 | } | |
2803 | ||
614732ea TG |
2804 | int rtnl_delete_link(struct net_device *dev) |
2805 | { | |
2806 | const struct rtnl_link_ops *ops; | |
2807 | LIST_HEAD(list_kill); | |
2808 | ||
2809 | ops = dev->rtnl_link_ops; | |
2810 | if (!ops || !ops->dellink) | |
2811 | return -EOPNOTSUPP; | |
2812 | ||
2813 | ops->dellink(dev, &list_kill); | |
2814 | unregister_netdevice_many(&list_kill); | |
2815 | ||
2816 | return 0; | |
2817 | } | |
2818 | EXPORT_SYMBOL_GPL(rtnl_delete_link); | |
2819 | ||
c21ef3e3 DA |
2820 | static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, |
2821 | struct netlink_ext_ack *extack) | |
38f7b870 | 2822 | { |
3b1e0a65 | 2823 | struct net *net = sock_net(skb->sk); |
b61ad68a CB |
2824 | struct net *tgt_net = net; |
2825 | struct net_device *dev = NULL; | |
38f7b870 PM |
2826 | struct ifinfomsg *ifm; |
2827 | char ifname[IFNAMSIZ]; | |
2828 | struct nlattr *tb[IFLA_MAX+1]; | |
2829 | int err; | |
b61ad68a | 2830 | int netnsid = -1; |
38f7b870 | 2831 | |
8cb08174 JB |
2832 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, |
2833 | ifla_policy, extack); | |
38f7b870 PM |
2834 | if (err < 0) |
2835 | return err; | |
2836 | ||
4ff66cae CB |
2837 | err = rtnl_ensure_unique_netns(tb, extack, true); |
2838 | if (err < 0) | |
2839 | return err; | |
2840 | ||
38f7b870 PM |
2841 | if (tb[IFLA_IFNAME]) |
2842 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
2843 | ||
7e4a8d5a CB |
2844 | if (tb[IFLA_TARGET_NETNSID]) { |
2845 | netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); | |
c383edc4 | 2846 | tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); |
b61ad68a CB |
2847 | if (IS_ERR(tgt_net)) |
2848 | return PTR_ERR(tgt_net); | |
2849 | } | |
2850 | ||
2851 | err = -EINVAL; | |
38f7b870 PM |
2852 | ifm = nlmsg_data(nlh); |
2853 | if (ifm->ifi_index > 0) | |
b61ad68a | 2854 | dev = __dev_get_by_index(tgt_net, ifm->ifi_index); |
38f7b870 | 2855 | else if (tb[IFLA_IFNAME]) |
b61ad68a | 2856 | dev = __dev_get_by_name(tgt_net, ifname); |
66400d54 | 2857 | else if (tb[IFLA_GROUP]) |
b61ad68a | 2858 | err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP])); |
38f7b870 | 2859 | else |
b61ad68a | 2860 | goto out; |
38f7b870 | 2861 | |
b61ad68a CB |
2862 | if (!dev) { |
2863 | if (tb[IFLA_IFNAME] || ifm->ifi_index > 0) | |
2864 | err = -ENODEV; | |
2865 | ||
2866 | goto out; | |
2867 | } | |
2868 | ||
2869 | err = rtnl_delete_link(dev); | |
38f7b870 | 2870 | |
b61ad68a CB |
2871 | out: |
2872 | if (netnsid >= 0) | |
2873 | put_net(tgt_net); | |
2874 | ||
2875 | return err; | |
38f7b870 PM |
2876 | } |
2877 | ||
3729d502 PM |
2878 | int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) |
2879 | { | |
2880 | unsigned int old_flags; | |
2881 | int err; | |
2882 | ||
2883 | old_flags = dev->flags; | |
2884 | if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { | |
6d040321 PM |
2885 | err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm), |
2886 | NULL); | |
3729d502 PM |
2887 | if (err < 0) |
2888 | return err; | |
2889 | } | |
2890 | ||
8d356b89 | 2891 | if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) { |
56a49d70 | 2892 | __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags)); |
8d356b89 RP |
2893 | } else { |
2894 | dev->rtnl_link_state = RTNL_LINK_INITIALIZED; | |
2895 | __dev_notify_flags(dev, old_flags, ~0U); | |
2896 | } | |
3729d502 PM |
2897 | return 0; |
2898 | } | |
2899 | EXPORT_SYMBOL(rtnl_configure_link); | |
2900 | ||
d0522f1c DA |
2901 | struct net_device *rtnl_create_link(struct net *net, const char *ifname, |
2902 | unsigned char name_assign_type, | |
2903 | const struct rtnl_link_ops *ops, | |
2904 | struct nlattr *tb[], | |
2905 | struct netlink_ext_ack *extack) | |
e7199288 | 2906 | { |
e7199288 | 2907 | struct net_device *dev; |
d40156aa JP |
2908 | unsigned int num_tx_queues = 1; |
2909 | unsigned int num_rx_queues = 1; | |
e7199288 | 2910 | |
76ff5cc9 JP |
2911 | if (tb[IFLA_NUM_TX_QUEUES]) |
2912 | num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); | |
2913 | else if (ops->get_num_tx_queues) | |
d40156aa | 2914 | num_tx_queues = ops->get_num_tx_queues(); |
76ff5cc9 JP |
2915 | |
2916 | if (tb[IFLA_NUM_RX_QUEUES]) | |
2917 | num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); | |
2918 | else if (ops->get_num_rx_queues) | |
d40156aa | 2919 | num_rx_queues = ops->get_num_rx_queues(); |
efacb309 | 2920 | |
d0522f1c DA |
2921 | if (num_tx_queues < 1 || num_tx_queues > 4096) { |
2922 | NL_SET_ERR_MSG(extack, "Invalid number of transmit queues"); | |
0e1d6eca | 2923 | return ERR_PTR(-EINVAL); |
d0522f1c | 2924 | } |
0e1d6eca | 2925 | |
d0522f1c DA |
2926 | if (num_rx_queues < 1 || num_rx_queues > 4096) { |
2927 | NL_SET_ERR_MSG(extack, "Invalid number of receive queues"); | |
0e1d6eca | 2928 | return ERR_PTR(-EINVAL); |
d0522f1c | 2929 | } |
0e1d6eca | 2930 | |
5517750f | 2931 | dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, |
c835a677 | 2932 | ops->setup, num_tx_queues, num_rx_queues); |
e7199288 | 2933 | if (!dev) |
d1892e4e | 2934 | return ERR_PTR(-ENOMEM); |
e7199288 | 2935 | |
81adee47 EB |
2936 | dev_net_set(dev, net); |
2937 | dev->rtnl_link_ops = ops; | |
3729d502 | 2938 | dev->rtnl_link_state = RTNL_LINK_INITIALIZING; |
81adee47 | 2939 | |
e7199288 PE |
2940 | if (tb[IFLA_MTU]) |
2941 | dev->mtu = nla_get_u32(tb[IFLA_MTU]); | |
2afb9b53 | 2942 | if (tb[IFLA_ADDRESS]) { |
e7199288 PE |
2943 | memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), |
2944 | nla_len(tb[IFLA_ADDRESS])); | |
2afb9b53 JP |
2945 | dev->addr_assign_type = NET_ADDR_SET; |
2946 | } | |
e7199288 PE |
2947 | if (tb[IFLA_BROADCAST]) |
2948 | memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), | |
2949 | nla_len(tb[IFLA_BROADCAST])); | |
2950 | if (tb[IFLA_TXQLEN]) | |
2951 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
2952 | if (tb[IFLA_OPERSTATE]) | |
93b2d4a2 | 2953 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); |
e7199288 PE |
2954 | if (tb[IFLA_LINKMODE]) |
2955 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); | |
ffa934f1 PM |
2956 | if (tb[IFLA_GROUP]) |
2957 | dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); | |
46e6b992 SH |
2958 | if (tb[IFLA_GSO_MAX_SIZE]) |
2959 | netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE])); | |
2960 | if (tb[IFLA_GSO_MAX_SEGS]) | |
a0b586fa | 2961 | dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); |
e7199288 PE |
2962 | |
2963 | return dev; | |
e7199288 | 2964 | } |
e0d087af | 2965 | EXPORT_SYMBOL(rtnl_create_link); |
e7199288 | 2966 | |
90f62cf3 EB |
2967 | static int rtnl_group_changelink(const struct sk_buff *skb, |
2968 | struct net *net, int group, | |
e7ed828f | 2969 | struct ifinfomsg *ifm, |
ddf9f970 | 2970 | struct netlink_ext_ack *extack, |
e7ed828f VD |
2971 | struct nlattr **tb) |
2972 | { | |
d079535d | 2973 | struct net_device *dev, *aux; |
e7ed828f VD |
2974 | int err; |
2975 | ||
d079535d | 2976 | for_each_netdev_safe(net, dev, aux) { |
e7ed828f | 2977 | if (dev->group == group) { |
ddf9f970 | 2978 | err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0); |
e7ed828f VD |
2979 | if (err < 0) |
2980 | return err; | |
2981 | } | |
2982 | } | |
2983 | ||
2984 | return 0; | |
2985 | } | |
2986 | ||
a2939745 JK |
2987 | static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
2988 | struct nlattr **attr, struct netlink_ext_ack *extack) | |
38f7b870 | 2989 | { |
420d0318 JK |
2990 | struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1]; |
2991 | unsigned char name_assign_type = NET_NAME_USER; | |
2992 | struct nlattr *linkinfo[IFLA_INFO_MAX + 1]; | |
2993 | const struct rtnl_link_ops *m_ops = NULL; | |
420d0318 | 2994 | struct net_device *master_dev = NULL; |
3b1e0a65 | 2995 | struct net *net = sock_net(skb->sk); |
38f7b870 | 2996 | const struct rtnl_link_ops *ops; |
420d0318 JK |
2997 | struct nlattr *tb[IFLA_MAX + 1]; |
2998 | struct net *dest_net, *link_net; | |
2999 | struct nlattr **slave_data; | |
3000 | char kind[MODULE_NAME_LEN]; | |
38f7b870 PM |
3001 | struct net_device *dev; |
3002 | struct ifinfomsg *ifm; | |
38f7b870 | 3003 | char ifname[IFNAMSIZ]; |
420d0318 | 3004 | struct nlattr **data; |
38f7b870 PM |
3005 | int err; |
3006 | ||
95a5afca | 3007 | #ifdef CONFIG_MODULES |
38f7b870 | 3008 | replay: |
8072f085 | 3009 | #endif |
8cb08174 JB |
3010 | err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, |
3011 | ifla_policy, extack); | |
38f7b870 PM |
3012 | if (err < 0) |
3013 | return err; | |
3014 | ||
4ff66cae CB |
3015 | err = rtnl_ensure_unique_netns(tb, extack, false); |
3016 | if (err < 0) | |
3017 | return err; | |
3018 | ||
38f7b870 PM |
3019 | if (tb[IFLA_IFNAME]) |
3020 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
3021 | else | |
3022 | ifname[0] = '\0'; | |
3023 | ||
3024 | ifm = nlmsg_data(nlh); | |
3025 | if (ifm->ifi_index > 0) | |
881d966b | 3026 | dev = __dev_get_by_index(net, ifm->ifi_index); |
e7ed828f VD |
3027 | else { |
3028 | if (ifname[0]) | |
3029 | dev = __dev_get_by_name(net, ifname); | |
e7ed828f VD |
3030 | else |
3031 | dev = NULL; | |
3032 | } | |
38f7b870 | 3033 | |
ba7d49b1 JP |
3034 | if (dev) { |
3035 | master_dev = netdev_master_upper_dev_get(dev); | |
3036 | if (master_dev) | |
3037 | m_ops = master_dev->rtnl_link_ops; | |
3038 | } | |
3039 | ||
e0d087af ED |
3040 | err = validate_linkmsg(dev, tb); |
3041 | if (err < 0) | |
1840bb13 TG |
3042 | return err; |
3043 | ||
38f7b870 | 3044 | if (tb[IFLA_LINKINFO]) { |
8cb08174 JB |
3045 | err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX, |
3046 | tb[IFLA_LINKINFO], | |
3047 | ifla_info_policy, NULL); | |
38f7b870 PM |
3048 | if (err < 0) |
3049 | return err; | |
3050 | } else | |
3051 | memset(linkinfo, 0, sizeof(linkinfo)); | |
3052 | ||
3053 | if (linkinfo[IFLA_INFO_KIND]) { | |
3054 | nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); | |
3055 | ops = rtnl_link_ops_get(kind); | |
3056 | } else { | |
3057 | kind[0] = '\0'; | |
3058 | ops = NULL; | |
3059 | } | |
3060 | ||
420d0318 JK |
3061 | data = NULL; |
3062 | if (ops) { | |
3063 | if (ops->maxtype > RTNL_MAX_TYPE) | |
3064 | return -EINVAL; | |
ccf8dbcd | 3065 | |
420d0318 | 3066 | if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { |
8cb08174 JB |
3067 | err = nla_parse_nested_deprecated(attr, ops->maxtype, |
3068 | linkinfo[IFLA_INFO_DATA], | |
3069 | ops->policy, extack); | |
420d0318 JK |
3070 | if (err < 0) |
3071 | return err; | |
3072 | data = attr; | |
38f7b870 | 3073 | } |
420d0318 JK |
3074 | if (ops->validate) { |
3075 | err = ops->validate(tb, data, extack); | |
3076 | if (err < 0) | |
3077 | return err; | |
3078 | } | |
3079 | } | |
38f7b870 | 3080 | |
420d0318 JK |
3081 | slave_data = NULL; |
3082 | if (m_ops) { | |
3083 | if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE) | |
3084 | return -EINVAL; | |
ccf8dbcd | 3085 | |
420d0318 JK |
3086 | if (m_ops->slave_maxtype && |
3087 | linkinfo[IFLA_INFO_SLAVE_DATA]) { | |
8cb08174 JB |
3088 | err = nla_parse_nested_deprecated(slave_attr, |
3089 | m_ops->slave_maxtype, | |
3090 | linkinfo[IFLA_INFO_SLAVE_DATA], | |
3091 | m_ops->slave_policy, | |
3092 | extack); | |
420d0318 JK |
3093 | if (err < 0) |
3094 | return err; | |
3095 | slave_data = slave_attr; | |
ba7d49b1 | 3096 | } |
420d0318 | 3097 | } |
ba7d49b1 | 3098 | |
420d0318 JK |
3099 | if (dev) { |
3100 | int status = 0; | |
38f7b870 | 3101 | |
420d0318 JK |
3102 | if (nlh->nlmsg_flags & NLM_F_EXCL) |
3103 | return -EEXIST; | |
3104 | if (nlh->nlmsg_flags & NLM_F_REPLACE) | |
3105 | return -EOPNOTSUPP; | |
38f7b870 | 3106 | |
420d0318 JK |
3107 | if (linkinfo[IFLA_INFO_DATA]) { |
3108 | if (!ops || ops != dev->rtnl_link_ops || | |
3109 | !ops->changelink) | |
3110 | return -EOPNOTSUPP; | |
38f7b870 | 3111 | |
420d0318 JK |
3112 | err = ops->changelink(dev, tb, data, extack); |
3113 | if (err < 0) | |
3114 | return err; | |
3115 | status |= DO_SETLINK_NOTIFY; | |
3116 | } | |
ba7d49b1 | 3117 | |
420d0318 JK |
3118 | if (linkinfo[IFLA_INFO_SLAVE_DATA]) { |
3119 | if (!m_ops || !m_ops->slave_changelink) | |
3120 | return -EOPNOTSUPP; | |
ba7d49b1 | 3121 | |
420d0318 JK |
3122 | err = m_ops->slave_changelink(master_dev, dev, tb, |
3123 | slave_data, extack); | |
3124 | if (err < 0) | |
3125 | return err; | |
3126 | status |= DO_SETLINK_NOTIFY; | |
38f7b870 PM |
3127 | } |
3128 | ||
420d0318 JK |
3129 | return do_setlink(skb, dev, ifm, extack, tb, ifname, status); |
3130 | } | |
3131 | ||
3132 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { | |
3133 | if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) | |
3134 | return rtnl_group_changelink(skb, net, | |
ffa934f1 | 3135 | nla_get_u32(tb[IFLA_GROUP]), |
ddf9f970 | 3136 | ifm, extack, tb); |
420d0318 JK |
3137 | return -ENODEV; |
3138 | } | |
38f7b870 | 3139 | |
420d0318 JK |
3140 | if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) |
3141 | return -EOPNOTSUPP; | |
38f7b870 | 3142 | |
420d0318 | 3143 | if (!ops) { |
95a5afca | 3144 | #ifdef CONFIG_MODULES |
420d0318 JK |
3145 | if (kind[0]) { |
3146 | __rtnl_unlock(); | |
3147 | request_module("rtnl-link-%s", kind); | |
3148 | rtnl_lock(); | |
3149 | ops = rtnl_link_ops_get(kind); | |
3150 | if (ops) | |
3151 | goto replay; | |
38f7b870 | 3152 | } |
420d0318 JK |
3153 | #endif |
3154 | NL_SET_ERR_MSG(extack, "Unknown device type"); | |
3155 | return -EOPNOTSUPP; | |
3156 | } | |
38f7b870 | 3157 | |
420d0318 JK |
3158 | if (!ops->setup) |
3159 | return -EOPNOTSUPP; | |
b0ab2fab | 3160 | |
420d0318 JK |
3161 | if (!ifname[0]) { |
3162 | snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); | |
3163 | name_assign_type = NET_NAME_ENUM; | |
3164 | } | |
e7199288 | 3165 | |
420d0318 JK |
3166 | dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN); |
3167 | if (IS_ERR(dest_net)) | |
3168 | return PTR_ERR(dest_net); | |
13ad1774 | 3169 | |
420d0318 JK |
3170 | if (tb[IFLA_LINK_NETNSID]) { |
3171 | int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); | |
317f4810 | 3172 | |
420d0318 JK |
3173 | link_net = get_net_ns_by_id(dest_net, id); |
3174 | if (!link_net) { | |
3175 | NL_SET_ERR_MSG(extack, "Unknown network namespace id"); | |
3176 | err = -EINVAL; | |
9c7dafbf PE |
3177 | goto out; |
3178 | } | |
420d0318 JK |
3179 | err = -EPERM; |
3180 | if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) | |
3181 | goto out; | |
3182 | } else { | |
3183 | link_net = NULL; | |
3184 | } | |
3185 | ||
3186 | dev = rtnl_create_link(link_net ? : dest_net, ifname, | |
3187 | name_assign_type, ops, tb, extack); | |
3188 | if (IS_ERR(dev)) { | |
3189 | err = PTR_ERR(dev); | |
3190 | goto out; | |
3191 | } | |
9c7dafbf | 3192 | |
420d0318 | 3193 | dev->ifindex = ifm->ifi_index; |
9c7dafbf | 3194 | |
420d0318 JK |
3195 | if (ops->newlink) { |
3196 | err = ops->newlink(link_net ? : net, dev, tb, data, extack); | |
3197 | /* Drivers should call free_netdev() in ->destructor | |
3198 | * and unregister it on failure after registration | |
3199 | * so that device could be finally freed in rtnl_unlock. | |
3200 | */ | |
3201 | if (err < 0) { | |
3202 | /* If device is not registered at all, free it now */ | |
3203 | if (dev->reg_state == NETREG_UNINITIALIZED) | |
0e0eee24 | 3204 | free_netdev(dev); |
420d0318 | 3205 | goto out; |
fce9b9be | 3206 | } |
420d0318 JK |
3207 | } else { |
3208 | err = register_netdevice(dev); | |
3209 | if (err < 0) { | |
3210 | free_netdev(dev); | |
3211 | goto out; | |
3212 | } | |
3213 | } | |
3214 | err = rtnl_configure_link(dev, ifm); | |
3215 | if (err < 0) | |
3216 | goto out_unregister; | |
3217 | if (link_net) { | |
3218 | err = dev_change_net_namespace(dev, dest_net, ifname); | |
43638900 DM |
3219 | if (err < 0) |
3220 | goto out_unregister; | |
420d0318 JK |
3221 | } |
3222 | if (tb[IFLA_MASTER]) { | |
3223 | err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); | |
3224 | if (err) | |
3225 | goto out_unregister; | |
3226 | } | |
3729d502 | 3227 | out: |
420d0318 JK |
3228 | if (link_net) |
3229 | put_net(link_net); | |
3230 | put_net(dest_net); | |
3231 | return err; | |
43638900 | 3232 | out_unregister: |
420d0318 JK |
3233 | if (ops->newlink) { |
3234 | LIST_HEAD(list_kill); | |
43638900 | 3235 | |
420d0318 JK |
3236 | ops->dellink(dev, &list_kill); |
3237 | unregister_netdevice_many(&list_kill); | |
3238 | } else { | |
3239 | unregister_netdevice(dev); | |
38f7b870 | 3240 | } |
420d0318 | 3241 | goto out; |
38f7b870 PM |
3242 | } |
3243 | ||
a2939745 JK |
3244 | static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
3245 | struct netlink_ext_ack *extack) | |
3246 | { | |
3247 | struct nlattr **attr; | |
3248 | int ret; | |
3249 | ||
3250 | attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL); | |
3251 | if (!attr) | |
3252 | return -ENOMEM; | |
3253 | ||
3254 | ret = __rtnl_newlink(skb, nlh, attr, extack); | |
3255 | kfree(attr); | |
3256 | return ret; | |
3257 | } | |
3258 | ||
9b3757b0 JK |
3259 | static int rtnl_valid_getlink_req(struct sk_buff *skb, |
3260 | const struct nlmsghdr *nlh, | |
3261 | struct nlattr **tb, | |
3262 | struct netlink_ext_ack *extack) | |
3263 | { | |
3264 | struct ifinfomsg *ifm; | |
3265 | int i, err; | |
3266 | ||
3267 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { | |
3268 | NL_SET_ERR_MSG(extack, "Invalid header for get link"); | |
3269 | return -EINVAL; | |
3270 | } | |
3271 | ||
3272 | if (!netlink_strict_get_check(skb)) | |
8cb08174 JB |
3273 | return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, |
3274 | ifla_policy, extack); | |
9b3757b0 JK |
3275 | |
3276 | ifm = nlmsg_data(nlh); | |
3277 | if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || | |
3278 | ifm->ifi_change) { | |
3279 | NL_SET_ERR_MSG(extack, "Invalid values in header for get link request"); | |
3280 | return -EINVAL; | |
3281 | } | |
3282 | ||
8cb08174 JB |
3283 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX, |
3284 | ifla_policy, extack); | |
9b3757b0 JK |
3285 | if (err) |
3286 | return err; | |
3287 | ||
3288 | for (i = 0; i <= IFLA_MAX; i++) { | |
3289 | if (!tb[i]) | |
3290 | continue; | |
3291 | ||
3292 | switch (i) { | |
3293 | case IFLA_IFNAME: | |
3294 | case IFLA_EXT_MASK: | |
3295 | case IFLA_TARGET_NETNSID: | |
3296 | break; | |
3297 | default: | |
3298 | NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request"); | |
3299 | return -EINVAL; | |
3300 | } | |
3301 | } | |
3302 | ||
3303 | return 0; | |
3304 | } | |
3305 | ||
c21ef3e3 DA |
3306 | static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
3307 | struct netlink_ext_ack *extack) | |
711e2c33 | 3308 | { |
3b1e0a65 | 3309 | struct net *net = sock_net(skb->sk); |
79e1ad14 | 3310 | struct net *tgt_net = net; |
b60c5115 | 3311 | struct ifinfomsg *ifm; |
a3d12891 | 3312 | char ifname[IFNAMSIZ]; |
b60c5115 TG |
3313 | struct nlattr *tb[IFLA_MAX+1]; |
3314 | struct net_device *dev = NULL; | |
3315 | struct sk_buff *nskb; | |
79e1ad14 | 3316 | int netnsid = -1; |
339bf98f | 3317 | int err; |
115c9b81 | 3318 | u32 ext_filter_mask = 0; |
711e2c33 | 3319 | |
9b3757b0 | 3320 | err = rtnl_valid_getlink_req(skb, nlh, tb, extack); |
b60c5115 | 3321 | if (err < 0) |
9918f230 | 3322 | return err; |
b60c5115 | 3323 | |
4ff66cae CB |
3324 | err = rtnl_ensure_unique_netns(tb, extack, true); |
3325 | if (err < 0) | |
3326 | return err; | |
3327 | ||
7e4a8d5a CB |
3328 | if (tb[IFLA_TARGET_NETNSID]) { |
3329 | netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); | |
c383edc4 | 3330 | tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); |
79e1ad14 JB |
3331 | if (IS_ERR(tgt_net)) |
3332 | return PTR_ERR(tgt_net); | |
3333 | } | |
3334 | ||
a3d12891 ED |
3335 | if (tb[IFLA_IFNAME]) |
3336 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
3337 | ||
115c9b81 GR |
3338 | if (tb[IFLA_EXT_MASK]) |
3339 | ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); | |
3340 | ||
79e1ad14 | 3341 | err = -EINVAL; |
b60c5115 | 3342 | ifm = nlmsg_data(nlh); |
a3d12891 | 3343 | if (ifm->ifi_index > 0) |
79e1ad14 | 3344 | dev = __dev_get_by_index(tgt_net, ifm->ifi_index); |
a3d12891 | 3345 | else if (tb[IFLA_IFNAME]) |
79e1ad14 | 3346 | dev = __dev_get_by_name(tgt_net, ifname); |
a3d12891 | 3347 | else |
79e1ad14 | 3348 | goto out; |
711e2c33 | 3349 | |
79e1ad14 | 3350 | err = -ENODEV; |
a3d12891 | 3351 | if (dev == NULL) |
79e1ad14 | 3352 | goto out; |
a3d12891 | 3353 | |
79e1ad14 | 3354 | err = -ENOBUFS; |
115c9b81 | 3355 | nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); |
a3d12891 | 3356 | if (nskb == NULL) |
79e1ad14 | 3357 | goto out; |
b60c5115 | 3358 | |
79e1ad14 JB |
3359 | err = rtnl_fill_ifinfo(nskb, dev, net, |
3360 | RTM_NEWLINK, NETLINK_CB(skb).portid, | |
3361 | nlh->nlmsg_seq, 0, 0, ext_filter_mask, | |
38e01b30 | 3362 | 0, NULL, 0, netnsid); |
26932566 PM |
3363 | if (err < 0) { |
3364 | /* -EMSGSIZE implies BUG in if_nlmsg_size */ | |
3365 | WARN_ON(err == -EMSGSIZE); | |
3366 | kfree_skb(nskb); | |
a3d12891 | 3367 | } else |
15e47304 | 3368 | err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); |
79e1ad14 JB |
3369 | out: |
3370 | if (netnsid >= 0) | |
3371 | put_net(tgt_net); | |
711e2c33 | 3372 | |
b60c5115 | 3373 | return err; |
711e2c33 | 3374 | } |
711e2c33 | 3375 | |
115c9b81 | 3376 | static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) |
c7ac8679 | 3377 | { |
115c9b81 GR |
3378 | struct net *net = sock_net(skb->sk); |
3379 | struct net_device *dev; | |
3380 | struct nlattr *tb[IFLA_MAX+1]; | |
3381 | u32 ext_filter_mask = 0; | |
3382 | u16 min_ifinfo_dump_size = 0; | |
e5eca6d4 MS |
3383 | int hdrlen; |
3384 | ||
3385 | /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ | |
3386 | hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? | |
3387 | sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); | |
115c9b81 | 3388 | |
8cb08174 | 3389 | if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) { |
a4b64fbe ED |
3390 | if (tb[IFLA_EXT_MASK]) |
3391 | ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); | |
3392 | } | |
115c9b81 GR |
3393 | |
3394 | if (!ext_filter_mask) | |
3395 | return NLMSG_GOODSIZE; | |
3396 | /* | |
3397 | * traverse the list of net devices and compute the minimum | |
3398 | * buffer size based upon the filter mask. | |
3399 | */ | |
6853dd48 FW |
3400 | rcu_read_lock(); |
3401 | for_each_netdev_rcu(net, dev) { | |
115c9b81 GR |
3402 | min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, |
3403 | if_nlmsg_size(dev, | |
3404 | ext_filter_mask)); | |
3405 | } | |
6853dd48 | 3406 | rcu_read_unlock(); |
115c9b81 | 3407 | |
93af2056 | 3408 | return nlmsg_total_size(min_ifinfo_dump_size); |
c7ac8679 GR |
3409 | } |
3410 | ||
42bad1da | 3411 | static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
3412 | { |
3413 | int idx; | |
3414 | int s_idx = cb->family; | |
87ccbb1f | 3415 | int type = cb->nlh->nlmsg_type - RTM_BASE; |
c63586dc | 3416 | int ret = 0; |
1da177e4 LT |
3417 | |
3418 | if (s_idx == 0) | |
3419 | s_idx = 1; | |
6853dd48 | 3420 | |
25239cee | 3421 | for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { |
addf9b90 | 3422 | struct rtnl_link **tab; |
addf9b90 | 3423 | struct rtnl_link *link; |
6853dd48 FW |
3424 | rtnl_dumpit_func dumpit; |
3425 | ||
1da177e4 LT |
3426 | if (idx < s_idx || idx == PF_PACKET) |
3427 | continue; | |
6853dd48 | 3428 | |
addf9b90 | 3429 | if (type < 0 || type >= RTM_NR_MSGTYPES) |
1da177e4 | 3430 | continue; |
6853dd48 | 3431 | |
addf9b90 FW |
3432 | tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]); |
3433 | if (!tab) | |
3434 | continue; | |
3435 | ||
3436 | link = tab[type]; | |
3437 | if (!link) | |
3438 | continue; | |
3439 | ||
3440 | dumpit = link->dumpit; | |
6853dd48 FW |
3441 | if (!dumpit) |
3442 | continue; | |
3443 | ||
0465277f | 3444 | if (idx > s_idx) { |
1da177e4 | 3445 | memset(&cb->args[0], 0, sizeof(cb->args)); |
0465277f ND |
3446 | cb->prev_seq = 0; |
3447 | cb->seq = 0; | |
3448 | } | |
c63586dc | 3449 | ret = dumpit(skb, cb); |
5e1acb4a | 3450 | if (ret) |
1da177e4 LT |
3451 | break; |
3452 | } | |
3453 | cb->family = idx; | |
3454 | ||
c63586dc | 3455 | return skb->len ? : ret; |
1da177e4 LT |
3456 | } |
3457 | ||
395eea6c | 3458 | struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, |
3d3ea5af | 3459 | unsigned int change, |
38e01b30 ND |
3460 | u32 event, gfp_t flags, int *new_nsid, |
3461 | int new_ifindex) | |
1da177e4 | 3462 | { |
c346dca1 | 3463 | struct net *net = dev_net(dev); |
1da177e4 | 3464 | struct sk_buff *skb; |
0ec6d3f4 | 3465 | int err = -ENOBUFS; |
c7ac8679 | 3466 | size_t if_info_size; |
1da177e4 | 3467 | |
7f294054 | 3468 | skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); |
0ec6d3f4 TG |
3469 | if (skb == NULL) |
3470 | goto errout; | |
1da177e4 | 3471 | |
79e1ad14 JB |
3472 | err = rtnl_fill_ifinfo(skb, dev, dev_net(dev), |
3473 | type, 0, 0, change, 0, 0, event, | |
38e01b30 | 3474 | new_nsid, new_ifindex, -1); |
26932566 PM |
3475 | if (err < 0) { |
3476 | /* -EMSGSIZE implies BUG in if_nlmsg_size() */ | |
3477 | WARN_ON(err == -EMSGSIZE); | |
3478 | kfree_skb(skb); | |
3479 | goto errout; | |
3480 | } | |
395eea6c | 3481 | return skb; |
0ec6d3f4 TG |
3482 | errout: |
3483 | if (err < 0) | |
4b3da706 | 3484 | rtnl_set_sk_err(net, RTNLGRP_LINK, err); |
395eea6c MB |
3485 | return NULL; |
3486 | } | |
3487 | ||
3488 | void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) | |
3489 | { | |
3490 | struct net *net = dev_net(dev); | |
3491 | ||
3492 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); | |
3493 | } | |
3494 | ||
3d3ea5af VY |
3495 | static void rtmsg_ifinfo_event(int type, struct net_device *dev, |
3496 | unsigned int change, u32 event, | |
38e01b30 | 3497 | gfp_t flags, int *new_nsid, int new_ifindex) |
395eea6c MB |
3498 | { |
3499 | struct sk_buff *skb; | |
3500 | ||
ed2a80ab ND |
3501 | if (dev->reg_state != NETREG_REGISTERED) |
3502 | return; | |
3503 | ||
38e01b30 ND |
3504 | skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid, |
3505 | new_ifindex); | |
395eea6c MB |
3506 | if (skb) |
3507 | rtmsg_ifinfo_send(skb, dev, flags); | |
1da177e4 | 3508 | } |
3d3ea5af VY |
3509 | |
3510 | void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, | |
3511 | gfp_t flags) | |
3512 | { | |
38e01b30 ND |
3513 | rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, |
3514 | NULL, 0); | |
3d3ea5af | 3515 | } |
1da177e4 | 3516 | |
6621dd29 | 3517 | void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change, |
38e01b30 | 3518 | gfp_t flags, int *new_nsid, int new_ifindex) |
6621dd29 ND |
3519 | { |
3520 | rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, | |
38e01b30 | 3521 | new_nsid, new_ifindex); |
6621dd29 ND |
3522 | } |
3523 | ||
d83b0603 JF |
3524 | static int nlmsg_populate_fdb_fill(struct sk_buff *skb, |
3525 | struct net_device *dev, | |
1e53d5bb | 3526 | u8 *addr, u16 vid, u32 pid, u32 seq, |
1c104a6b | 3527 | int type, unsigned int flags, |
b3379041 | 3528 | int nlflags, u16 ndm_state) |
d83b0603 JF |
3529 | { |
3530 | struct nlmsghdr *nlh; | |
3531 | struct ndmsg *ndm; | |
3532 | ||
1c104a6b | 3533 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); |
d83b0603 JF |
3534 | if (!nlh) |
3535 | return -EMSGSIZE; | |
3536 | ||
3537 | ndm = nlmsg_data(nlh); | |
3538 | ndm->ndm_family = AF_BRIDGE; | |
3539 | ndm->ndm_pad1 = 0; | |
3540 | ndm->ndm_pad2 = 0; | |
3541 | ndm->ndm_flags = flags; | |
3542 | ndm->ndm_type = 0; | |
3543 | ndm->ndm_ifindex = dev->ifindex; | |
b3379041 | 3544 | ndm->ndm_state = ndm_state; |
d83b0603 JF |
3545 | |
3546 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) | |
3547 | goto nla_put_failure; | |
1e53d5bb HS |
3548 | if (vid) |
3549 | if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) | |
3550 | goto nla_put_failure; | |
d83b0603 | 3551 | |
053c095a JB |
3552 | nlmsg_end(skb, nlh); |
3553 | return 0; | |
d83b0603 JF |
3554 | |
3555 | nla_put_failure: | |
3556 | nlmsg_cancel(skb, nlh); | |
3557 | return -EMSGSIZE; | |
3558 | } | |
3559 | ||
3ff661c3 JF |
3560 | static inline size_t rtnl_fdb_nlmsg_size(void) |
3561 | { | |
f82ef3e1 SD |
3562 | return NLMSG_ALIGN(sizeof(struct ndmsg)) + |
3563 | nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ | |
3564 | nla_total_size(sizeof(u16)) + /* NDA_VLAN */ | |
3565 | 0; | |
3ff661c3 JF |
3566 | } |
3567 | ||
b3379041 HS |
3568 | static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, |
3569 | u16 ndm_state) | |
3ff661c3 JF |
3570 | { |
3571 | struct net *net = dev_net(dev); | |
3572 | struct sk_buff *skb; | |
3573 | int err = -ENOBUFS; | |
3574 | ||
3575 | skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); | |
3576 | if (!skb) | |
3577 | goto errout; | |
3578 | ||
1e53d5bb | 3579 | err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, |
b3379041 | 3580 | 0, 0, type, NTF_SELF, 0, ndm_state); |
3ff661c3 JF |
3581 | if (err < 0) { |
3582 | kfree_skb(skb); | |
3583 | goto errout; | |
3584 | } | |
3585 | ||
3586 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
3587 | return; | |
3588 | errout: | |
3589 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
3590 | } | |
3591 | ||
a986967e | 3592 | /* |
090096bf VY |
3593 | * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry |
3594 | */ | |
3595 | int ndo_dflt_fdb_add(struct ndmsg *ndm, | |
3596 | struct nlattr *tb[], | |
3597 | struct net_device *dev, | |
f6f6424b | 3598 | const unsigned char *addr, u16 vid, |
090096bf VY |
3599 | u16 flags) |
3600 | { | |
3601 | int err = -EINVAL; | |
3602 | ||
3603 | /* If aging addresses are supported device will need to | |
3604 | * implement its own handler for this. | |
3605 | */ | |
3606 | if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { | |
3607 | pr_info("%s: FDB only supports static addresses\n", dev->name); | |
3608 | return err; | |
3609 | } | |
3610 | ||
65891fea OG |
3611 | if (vid) { |
3612 | pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); | |
3613 | return err; | |
3614 | } | |
3615 | ||
090096bf VY |
3616 | if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) |
3617 | err = dev_uc_add_excl(dev, addr); | |
3618 | else if (is_multicast_ether_addr(addr)) | |
3619 | err = dev_mc_add_excl(dev, addr); | |
3620 | ||
3621 | /* Only return duplicate errors if NLM_F_EXCL is set */ | |
3622 | if (err == -EEXIST && !(flags & NLM_F_EXCL)) | |
3623 | err = 0; | |
3624 | ||
3625 | return err; | |
3626 | } | |
3627 | EXPORT_SYMBOL(ndo_dflt_fdb_add); | |
3628 | ||
b88d12e4 FW |
3629 | static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid, |
3630 | struct netlink_ext_ack *extack) | |
f6f6424b JP |
3631 | { |
3632 | u16 vid = 0; | |
3633 | ||
3634 | if (vlan_attr) { | |
3635 | if (nla_len(vlan_attr) != sizeof(u16)) { | |
b88d12e4 | 3636 | NL_SET_ERR_MSG(extack, "invalid vlan attribute size"); |
f6f6424b JP |
3637 | return -EINVAL; |
3638 | } | |
3639 | ||
3640 | vid = nla_get_u16(vlan_attr); | |
3641 | ||
3642 | if (!vid || vid >= VLAN_VID_MASK) { | |
b88d12e4 | 3643 | NL_SET_ERR_MSG(extack, "invalid vlan id"); |
f6f6424b JP |
3644 | return -EINVAL; |
3645 | } | |
3646 | } | |
3647 | *p_vid = vid; | |
3648 | return 0; | |
3649 | } | |
3650 | ||
c21ef3e3 DA |
3651 | static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, |
3652 | struct netlink_ext_ack *extack) | |
77162022 JF |
3653 | { |
3654 | struct net *net = sock_net(skb->sk); | |
77162022 JF |
3655 | struct ndmsg *ndm; |
3656 | struct nlattr *tb[NDA_MAX+1]; | |
3657 | struct net_device *dev; | |
3658 | u8 *addr; | |
f6f6424b | 3659 | u16 vid; |
77162022 JF |
3660 | int err; |
3661 | ||
8cb08174 JB |
3662 | err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, |
3663 | extack); | |
77162022 JF |
3664 | if (err < 0) |
3665 | return err; | |
3666 | ||
3667 | ndm = nlmsg_data(nlh); | |
3668 | if (ndm->ndm_ifindex == 0) { | |
b88d12e4 | 3669 | NL_SET_ERR_MSG(extack, "invalid ifindex"); |
77162022 JF |
3670 | return -EINVAL; |
3671 | } | |
3672 | ||
3673 | dev = __dev_get_by_index(net, ndm->ndm_ifindex); | |
3674 | if (dev == NULL) { | |
b88d12e4 | 3675 | NL_SET_ERR_MSG(extack, "unknown ifindex"); |
77162022 JF |
3676 | return -ENODEV; |
3677 | } | |
3678 | ||
3679 | if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { | |
b88d12e4 | 3680 | NL_SET_ERR_MSG(extack, "invalid address"); |
77162022 JF |
3681 | return -EINVAL; |
3682 | } | |
3683 | ||
da715775 IS |
3684 | if (dev->type != ARPHRD_ETHER) { |
3685 | NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices"); | |
3686 | return -EINVAL; | |
3687 | } | |
3688 | ||
77162022 | 3689 | addr = nla_data(tb[NDA_LLADDR]); |
77162022 | 3690 | |
b88d12e4 | 3691 | err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); |
f6f6424b JP |
3692 | if (err) |
3693 | return err; | |
3694 | ||
77162022 JF |
3695 | err = -EOPNOTSUPP; |
3696 | ||
3697 | /* Support fdb on master device the net/bridge default case */ | |
3698 | if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && | |
3699 | (dev->priv_flags & IFF_BRIDGE_PORT)) { | |
898e5061 JP |
3700 | struct net_device *br_dev = netdev_master_upper_dev_get(dev); |
3701 | const struct net_device_ops *ops = br_dev->netdev_ops; | |
3702 | ||
f6f6424b | 3703 | err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, |
87b0984e | 3704 | nlh->nlmsg_flags, extack); |
77162022 JF |
3705 | if (err) |
3706 | goto out; | |
3707 | else | |
3708 | ndm->ndm_flags &= ~NTF_MASTER; | |
3709 | } | |
3710 | ||
3711 | /* Embedded bridge, macvlan, and any other device support */ | |
090096bf VY |
3712 | if ((ndm->ndm_flags & NTF_SELF)) { |
3713 | if (dev->netdev_ops->ndo_fdb_add) | |
3714 | err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, | |
f6f6424b | 3715 | vid, |
87b0984e PM |
3716 | nlh->nlmsg_flags, |
3717 | extack); | |
090096bf | 3718 | else |
f6f6424b | 3719 | err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, |
090096bf | 3720 | nlh->nlmsg_flags); |
77162022 | 3721 | |
3ff661c3 | 3722 | if (!err) { |
b3379041 HS |
3723 | rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, |
3724 | ndm->ndm_state); | |
77162022 | 3725 | ndm->ndm_flags &= ~NTF_SELF; |
3ff661c3 | 3726 | } |
77162022 JF |
3727 | } |
3728 | out: | |
3729 | return err; | |
3730 | } | |
3731 | ||
a986967e | 3732 | /* |
090096bf VY |
3733 | * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry |
3734 | */ | |
3735 | int ndo_dflt_fdb_del(struct ndmsg *ndm, | |
3736 | struct nlattr *tb[], | |
3737 | struct net_device *dev, | |
f6f6424b | 3738 | const unsigned char *addr, u16 vid) |
090096bf | 3739 | { |
c8a89c4a | 3740 | int err = -EINVAL; |
090096bf VY |
3741 | |
3742 | /* If aging addresses are supported device will need to | |
3743 | * implement its own handler for this. | |
3744 | */ | |
64535993 | 3745 | if (!(ndm->ndm_state & NUD_PERMANENT)) { |
090096bf | 3746 | pr_info("%s: FDB only supports static addresses\n", dev->name); |
c8a89c4a | 3747 | return err; |
090096bf VY |
3748 | } |
3749 | ||
3750 | if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) | |
3751 | err = dev_uc_del(dev, addr); | |
3752 | else if (is_multicast_ether_addr(addr)) | |
3753 | err = dev_mc_del(dev, addr); | |
090096bf VY |
3754 | |
3755 | return err; | |
3756 | } | |
3757 | EXPORT_SYMBOL(ndo_dflt_fdb_del); | |
3758 | ||
c21ef3e3 DA |
3759 | static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, |
3760 | struct netlink_ext_ack *extack) | |
77162022 JF |
3761 | { |
3762 | struct net *net = sock_net(skb->sk); | |
3763 | struct ndmsg *ndm; | |
1690be63 | 3764 | struct nlattr *tb[NDA_MAX+1]; |
77162022 JF |
3765 | struct net_device *dev; |
3766 | int err = -EINVAL; | |
3767 | __u8 *addr; | |
f6f6424b | 3768 | u16 vid; |
77162022 | 3769 | |
90f62cf3 | 3770 | if (!netlink_capable(skb, CAP_NET_ADMIN)) |
1690be63 VY |
3771 | return -EPERM; |
3772 | ||
8cb08174 JB |
3773 | err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, |
3774 | extack); | |
1690be63 VY |
3775 | if (err < 0) |
3776 | return err; | |
77162022 JF |
3777 | |
3778 | ndm = nlmsg_data(nlh); | |
3779 | if (ndm->ndm_ifindex == 0) { | |
b88d12e4 | 3780 | NL_SET_ERR_MSG(extack, "invalid ifindex"); |
77162022 JF |
3781 | return -EINVAL; |
3782 | } | |
3783 | ||
3784 | dev = __dev_get_by_index(net, ndm->ndm_ifindex); | |
3785 | if (dev == NULL) { | |
b88d12e4 | 3786 | NL_SET_ERR_MSG(extack, "unknown ifindex"); |
77162022 JF |
3787 | return -ENODEV; |
3788 | } | |
3789 | ||
1690be63 | 3790 | if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { |
b88d12e4 | 3791 | NL_SET_ERR_MSG(extack, "invalid address"); |
1690be63 VY |
3792 | return -EINVAL; |
3793 | } | |
3794 | ||
da715775 IS |
3795 | if (dev->type != ARPHRD_ETHER) { |
3796 | NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices"); | |
3797 | return -EINVAL; | |
3798 | } | |
3799 | ||
1690be63 | 3800 | addr = nla_data(tb[NDA_LLADDR]); |
77162022 | 3801 | |
b88d12e4 | 3802 | err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); |
f6f6424b JP |
3803 | if (err) |
3804 | return err; | |
3805 | ||
77162022 JF |
3806 | err = -EOPNOTSUPP; |
3807 | ||
3808 | /* Support fdb on master device the net/bridge default case */ | |
3809 | if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && | |
3810 | (dev->priv_flags & IFF_BRIDGE_PORT)) { | |
898e5061 JP |
3811 | struct net_device *br_dev = netdev_master_upper_dev_get(dev); |
3812 | const struct net_device_ops *ops = br_dev->netdev_ops; | |
77162022 | 3813 | |
898e5061 | 3814 | if (ops->ndo_fdb_del) |
f6f6424b | 3815 | err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); |
77162022 JF |
3816 | |
3817 | if (err) | |
3818 | goto out; | |
3819 | else | |
3820 | ndm->ndm_flags &= ~NTF_MASTER; | |
3821 | } | |
3822 | ||
3823 | /* Embedded bridge, macvlan, and any other device support */ | |
090096bf VY |
3824 | if (ndm->ndm_flags & NTF_SELF) { |
3825 | if (dev->netdev_ops->ndo_fdb_del) | |
f6f6424b JP |
3826 | err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, |
3827 | vid); | |
090096bf | 3828 | else |
f6f6424b | 3829 | err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); |
77162022 | 3830 | |
3ff661c3 | 3831 | if (!err) { |
b3379041 HS |
3832 | rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, |
3833 | ndm->ndm_state); | |
77162022 | 3834 | ndm->ndm_flags &= ~NTF_SELF; |
3ff661c3 | 3835 | } |
77162022 JF |
3836 | } |
3837 | out: | |
3838 | return err; | |
3839 | } | |
3840 | ||
d83b0603 JF |
3841 | static int nlmsg_populate_fdb(struct sk_buff *skb, |
3842 | struct netlink_callback *cb, | |
3843 | struct net_device *dev, | |
3844 | int *idx, | |
3845 | struct netdev_hw_addr_list *list) | |
3846 | { | |
3847 | struct netdev_hw_addr *ha; | |
3848 | int err; | |
15e47304 | 3849 | u32 portid, seq; |
d83b0603 | 3850 | |
15e47304 | 3851 | portid = NETLINK_CB(cb->skb).portid; |
d83b0603 JF |
3852 | seq = cb->nlh->nlmsg_seq; |
3853 | ||
3854 | list_for_each_entry(ha, &list->list, list) { | |
d297653d | 3855 | if (*idx < cb->args[2]) |
d83b0603 JF |
3856 | goto skip; |
3857 | ||
1e53d5bb | 3858 | err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, |
a7a558fe | 3859 | portid, seq, |
1c104a6b | 3860 | RTM_NEWNEIGH, NTF_SELF, |
b3379041 | 3861 | NLM_F_MULTI, NUD_PERMANENT); |
d83b0603 JF |
3862 | if (err < 0) |
3863 | return err; | |
3864 | skip: | |
3865 | *idx += 1; | |
3866 | } | |
3867 | return 0; | |
3868 | } | |
3869 | ||
3870 | /** | |
2c53040f | 3871 | * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. |
a986967e BVA |
3872 | * @skb: socket buffer to store message in |
3873 | * @cb: netlink callback | |
d83b0603 | 3874 | * @dev: netdevice |
a986967e BVA |
3875 | * @filter_dev: ignored |
3876 | * @idx: the number of FDB table entries dumped is added to *@idx | |
d83b0603 JF |
3877 | * |
3878 | * Default netdevice operation to dump the existing unicast address list. | |
91f3e7b1 | 3879 | * Returns number of addresses from list put in skb. |
d83b0603 JF |
3880 | */ |
3881 | int ndo_dflt_fdb_dump(struct sk_buff *skb, | |
3882 | struct netlink_callback *cb, | |
3883 | struct net_device *dev, | |
5d5eacb3 | 3884 | struct net_device *filter_dev, |
d297653d | 3885 | int *idx) |
d83b0603 JF |
3886 | { |
3887 | int err; | |
3888 | ||
68883893 ED |
3889 | if (dev->type != ARPHRD_ETHER) |
3890 | return -EINVAL; | |
3891 | ||
d83b0603 | 3892 | netif_addr_lock_bh(dev); |
d297653d | 3893 | err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); |
d83b0603 JF |
3894 | if (err) |
3895 | goto out; | |
2934c9db | 3896 | err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); |
d83b0603 JF |
3897 | out: |
3898 | netif_addr_unlock_bh(dev); | |
d297653d | 3899 | return err; |
d83b0603 JF |
3900 | } |
3901 | EXPORT_SYMBOL(ndo_dflt_fdb_dump); | |
3902 | ||
8c6e137f DA |
3903 | static int valid_fdb_dump_strict(const struct nlmsghdr *nlh, |
3904 | int *br_idx, int *brport_idx, | |
3905 | struct netlink_ext_ack *extack) | |
3906 | { | |
3907 | struct nlattr *tb[NDA_MAX + 1]; | |
3908 | struct ndmsg *ndm; | |
3909 | int err, i; | |
3910 | ||
3911 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { | |
3912 | NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request"); | |
3913 | return -EINVAL; | |
3914 | } | |
3915 | ||
3916 | ndm = nlmsg_data(nlh); | |
3917 | if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || | |
3918 | ndm->ndm_flags || ndm->ndm_type) { | |
3919 | NL_SET_ERR_MSG(extack, "Invalid values in header for fbd dump request"); | |
3920 | return -EINVAL; | |
3921 | } | |
3922 | ||
8cb08174 JB |
3923 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, |
3924 | NDA_MAX, NULL, extack); | |
8c6e137f DA |
3925 | if (err < 0) |
3926 | return err; | |
3927 | ||
3928 | *brport_idx = ndm->ndm_ifindex; | |
3929 | for (i = 0; i <= NDA_MAX; ++i) { | |
3930 | if (!tb[i]) | |
3931 | continue; | |
3932 | ||
3933 | switch (i) { | |
3934 | case NDA_IFINDEX: | |
3935 | if (nla_len(tb[i]) != sizeof(u32)) { | |
3936 | NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request"); | |
3937 | return -EINVAL; | |
3938 | } | |
3939 | *brport_idx = nla_get_u32(tb[NDA_IFINDEX]); | |
3940 | break; | |
3941 | case NDA_MASTER: | |
3942 | if (nla_len(tb[i]) != sizeof(u32)) { | |
3943 | NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request"); | |
3944 | return -EINVAL; | |
3945 | } | |
3946 | *br_idx = nla_get_u32(tb[NDA_MASTER]); | |
3947 | break; | |
3948 | default: | |
3949 | NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request"); | |
3950 | return -EINVAL; | |
3951 | } | |
3952 | } | |
3953 | ||
3954 | return 0; | |
3955 | } | |
3956 | ||
8dfbda19 DA |
3957 | static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh, |
3958 | int *br_idx, int *brport_idx, | |
3959 | struct netlink_ext_ack *extack) | |
77162022 | 3960 | { |
5e6d2435 | 3961 | struct nlattr *tb[IFLA_MAX+1]; |
8dfbda19 | 3962 | int err; |
5e6d2435 | 3963 | |
bd961c9b MFO |
3964 | /* A hack to preserve kernel<->userspace interface. |
3965 | * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0. | |
3966 | * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails. | |
3967 | * So, check for ndmsg with an optional u32 attribute (not used here). | |
3968 | * Fortunately these sizes don't conflict with the size of ifinfomsg | |
3969 | * with an optional attribute. | |
3970 | */ | |
8dfbda19 DA |
3971 | if (nlmsg_len(nlh) != sizeof(struct ndmsg) && |
3972 | (nlmsg_len(nlh) != sizeof(struct ndmsg) + | |
bd961c9b | 3973 | nla_attr_size(sizeof(u32)))) { |
4565d7e5 DA |
3974 | struct ifinfomsg *ifm; |
3975 | ||
8cb08174 JB |
3976 | err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), |
3977 | tb, IFLA_MAX, ifla_policy, | |
3978 | extack); | |
bd961c9b MFO |
3979 | if (err < 0) { |
3980 | return -EINVAL; | |
3981 | } else if (err == 0) { | |
3982 | if (tb[IFLA_MASTER]) | |
8dfbda19 | 3983 | *br_idx = nla_get_u32(tb[IFLA_MASTER]); |
bd961c9b | 3984 | } |
5e6d2435 | 3985 | |
4565d7e5 | 3986 | ifm = nlmsg_data(nlh); |
8dfbda19 | 3987 | *brport_idx = ifm->ifi_index; |
bd961c9b | 3988 | } |
8dfbda19 DA |
3989 | return 0; |
3990 | } | |
3991 | ||
3992 | static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
3993 | { | |
3994 | struct net_device *dev; | |
3995 | struct net_device *br_dev = NULL; | |
3996 | const struct net_device_ops *ops = NULL; | |
3997 | const struct net_device_ops *cops = NULL; | |
3998 | struct net *net = sock_net(skb->sk); | |
3999 | struct hlist_head *head; | |
4000 | int brport_idx = 0; | |
4001 | int br_idx = 0; | |
4002 | int h, s_h; | |
4003 | int idx = 0, s_idx; | |
4004 | int err = 0; | |
4005 | int fidx = 0; | |
4006 | ||
8c6e137f DA |
4007 | if (cb->strict_check) |
4008 | err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx, | |
4009 | cb->extack); | |
4010 | else | |
4011 | err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx, | |
4012 | cb->extack); | |
8dfbda19 DA |
4013 | if (err < 0) |
4014 | return err; | |
5e6d2435 JHS |
4015 | |
4016 | if (br_idx) { | |
4017 | br_dev = __dev_get_by_index(net, br_idx); | |
4018 | if (!br_dev) | |
4019 | return -ENODEV; | |
4020 | ||
4021 | ops = br_dev->netdev_ops; | |
5e6d2435 JHS |
4022 | } |
4023 | ||
d297653d RP |
4024 | s_h = cb->args[0]; |
4025 | s_idx = cb->args[1]; | |
5e6d2435 | 4026 | |
d297653d RP |
4027 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { |
4028 | idx = 0; | |
4029 | head = &net->dev_index_head[h]; | |
4030 | hlist_for_each_entry(dev, head, index_hlist) { | |
5e6d2435 | 4031 | |
d297653d | 4032 | if (brport_idx && (dev->ifindex != brport_idx)) |
5e6d2435 JHS |
4033 | continue; |
4034 | ||
d297653d RP |
4035 | if (!br_idx) { /* user did not specify a specific bridge */ |
4036 | if (dev->priv_flags & IFF_BRIDGE_PORT) { | |
4037 | br_dev = netdev_master_upper_dev_get(dev); | |
4038 | cops = br_dev->netdev_ops; | |
4039 | } | |
4040 | } else { | |
4041 | if (dev != br_dev && | |
4042 | !(dev->priv_flags & IFF_BRIDGE_PORT)) | |
4043 | continue; | |
5e6d2435 | 4044 | |
d297653d RP |
4045 | if (br_dev != netdev_master_upper_dev_get(dev) && |
4046 | !(dev->priv_flags & IFF_EBRIDGE)) | |
4047 | continue; | |
4048 | cops = ops; | |
4049 | } | |
77162022 | 4050 | |
d297653d RP |
4051 | if (idx < s_idx) |
4052 | goto cont; | |
77162022 | 4053 | |
d297653d RP |
4054 | if (dev->priv_flags & IFF_BRIDGE_PORT) { |
4055 | if (cops && cops->ndo_fdb_dump) { | |
4056 | err = cops->ndo_fdb_dump(skb, cb, | |
4057 | br_dev, dev, | |
4058 | &fidx); | |
4059 | if (err == -EMSGSIZE) | |
4060 | goto out; | |
4061 | } | |
4062 | } | |
5e6d2435 | 4063 | |
d297653d RP |
4064 | if (dev->netdev_ops->ndo_fdb_dump) |
4065 | err = dev->netdev_ops->ndo_fdb_dump(skb, cb, | |
4066 | dev, NULL, | |
4067 | &fidx); | |
4068 | else | |
4069 | err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, | |
4070 | &fidx); | |
4071 | if (err == -EMSGSIZE) | |
4072 | goto out; | |
4073 | ||
4074 | cops = NULL; | |
4075 | ||
4076 | /* reset fdb offset to 0 for rest of the interfaces */ | |
4077 | cb->args[2] = 0; | |
4078 | fidx = 0; | |
4079 | cont: | |
4080 | idx++; | |
4081 | } | |
77162022 | 4082 | } |
77162022 | 4083 | |
d297653d RP |
4084 | out: |
4085 | cb->args[0] = h; | |
4086 | cb->args[1] = idx; | |
4087 | cb->args[2] = fidx; | |
4088 | ||
77162022 JF |
4089 | return skb->len; |
4090 | } | |
4091 | ||
5b2f94b2 RP |
4092 | static int valid_fdb_get_strict(const struct nlmsghdr *nlh, |
4093 | struct nlattr **tb, u8 *ndm_flags, | |
4094 | int *br_idx, int *brport_idx, u8 **addr, | |
4095 | u16 *vid, struct netlink_ext_ack *extack) | |
4096 | { | |
4097 | struct ndmsg *ndm; | |
4098 | int err, i; | |
4099 | ||
4100 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { | |
4101 | NL_SET_ERR_MSG(extack, "Invalid header for fdb get request"); | |
4102 | return -EINVAL; | |
4103 | } | |
4104 | ||
4105 | ndm = nlmsg_data(nlh); | |
4106 | if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || | |
4107 | ndm->ndm_type) { | |
4108 | NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request"); | |
4109 | return -EINVAL; | |
4110 | } | |
4111 | ||
4112 | if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) { | |
4113 | NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request"); | |
4114 | return -EINVAL; | |
4115 | } | |
4116 | ||
8cb08174 JB |
4117 | err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, |
4118 | NDA_MAX, nda_policy, extack); | |
5b2f94b2 RP |
4119 | if (err < 0) |
4120 | return err; | |
4121 | ||
4122 | *ndm_flags = ndm->ndm_flags; | |
4123 | *brport_idx = ndm->ndm_ifindex; | |
4124 | for (i = 0; i <= NDA_MAX; ++i) { | |
4125 | if (!tb[i]) | |
4126 | continue; | |
4127 | ||
4128 | switch (i) { | |
4129 | case NDA_MASTER: | |
4130 | *br_idx = nla_get_u32(tb[i]); | |
4131 | break; | |
4132 | case NDA_LLADDR: | |
4133 | if (nla_len(tb[i]) != ETH_ALEN) { | |
4134 | NL_SET_ERR_MSG(extack, "Invalid address in fdb get request"); | |
4135 | return -EINVAL; | |
4136 | } | |
4137 | *addr = nla_data(tb[i]); | |
4138 | break; | |
4139 | case NDA_VLAN: | |
4140 | err = fdb_vid_parse(tb[i], vid, extack); | |
4141 | if (err) | |
4142 | return err; | |
4143 | break; | |
4144 | case NDA_VNI: | |
4145 | break; | |
4146 | default: | |
4147 | NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request"); | |
4148 | return -EINVAL; | |
4149 | } | |
4150 | } | |
4151 | ||
4152 | return 0; | |
4153 | } | |
4154 | ||
4155 | static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh, | |
4156 | struct netlink_ext_ack *extack) | |
4157 | { | |
4158 | struct net_device *dev = NULL, *br_dev = NULL; | |
4159 | const struct net_device_ops *ops = NULL; | |
4160 | struct net *net = sock_net(in_skb->sk); | |
4161 | struct nlattr *tb[NDA_MAX + 1]; | |
4162 | struct sk_buff *skb; | |
4163 | int brport_idx = 0; | |
4164 | u8 ndm_flags = 0; | |
4165 | int br_idx = 0; | |
4166 | u8 *addr = NULL; | |
4167 | u16 vid = 0; | |
4168 | int err; | |
4169 | ||
4170 | err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx, | |
4171 | &brport_idx, &addr, &vid, extack); | |
4172 | if (err < 0) | |
4173 | return err; | |
4174 | ||
f989d03e NA |
4175 | if (!addr) { |
4176 | NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request"); | |
4177 | return -EINVAL; | |
4178 | } | |
4179 | ||
5b2f94b2 RP |
4180 | if (brport_idx) { |
4181 | dev = __dev_get_by_index(net, brport_idx); | |
4182 | if (!dev) { | |
4183 | NL_SET_ERR_MSG(extack, "Unknown device ifindex"); | |
4184 | return -ENODEV; | |
4185 | } | |
4186 | } | |
4187 | ||
4188 | if (br_idx) { | |
4189 | if (dev) { | |
4190 | NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive"); | |
4191 | return -EINVAL; | |
4192 | } | |
4193 | ||
4194 | br_dev = __dev_get_by_index(net, br_idx); | |
4195 | if (!br_dev) { | |
4196 | NL_SET_ERR_MSG(extack, "Invalid master ifindex"); | |
4197 | return -EINVAL; | |
4198 | } | |
4199 | ops = br_dev->netdev_ops; | |
4200 | } | |
4201 | ||
4202 | if (dev) { | |
4203 | if (!ndm_flags || (ndm_flags & NTF_MASTER)) { | |
4204 | if (!(dev->priv_flags & IFF_BRIDGE_PORT)) { | |
4205 | NL_SET_ERR_MSG(extack, "Device is not a bridge port"); | |
4206 | return -EINVAL; | |
4207 | } | |
4208 | br_dev = netdev_master_upper_dev_get(dev); | |
4209 | if (!br_dev) { | |
4210 | NL_SET_ERR_MSG(extack, "Master of device not found"); | |
4211 | return -EINVAL; | |
4212 | } | |
4213 | ops = br_dev->netdev_ops; | |
4214 | } else { | |
4215 | if (!(ndm_flags & NTF_SELF)) { | |
4216 | NL_SET_ERR_MSG(extack, "Missing NTF_SELF"); | |
4217 | return -EINVAL; | |
4218 | } | |
4219 | ops = dev->netdev_ops; | |
4220 | } | |
4221 | } | |
4222 | ||
4223 | if (!br_dev && !dev) { | |
4224 | NL_SET_ERR_MSG(extack, "No device specified"); | |
4225 | return -ENODEV; | |
4226 | } | |
4227 | ||
4228 | if (!ops || !ops->ndo_fdb_get) { | |
4229 | NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device"); | |
4230 | return -EOPNOTSUPP; | |
4231 | } | |
4232 | ||
4233 | skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
4234 | if (!skb) | |
4235 | return -ENOBUFS; | |
4236 | ||
4237 | if (br_dev) | |
4238 | dev = br_dev; | |
4239 | err = ops->ndo_fdb_get(skb, tb, dev, addr, vid, | |
4240 | NETLINK_CB(in_skb).portid, | |
4241 | nlh->nlmsg_seq, extack); | |
4242 | if (err) | |
4243 | goto out; | |
4244 | ||
4245 | return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); | |
4246 | out: | |
4247 | kfree_skb(skb); | |
4248 | return err; | |
4249 | } | |
4250 | ||
2c3c031c SF |
4251 | static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, |
4252 | unsigned int attrnum, unsigned int flag) | |
4253 | { | |
4254 | if (mask & flag) | |
4255 | return nla_put_u8(skb, attrnum, !!(flags & flag)); | |
4256 | return 0; | |
4257 | } | |
4258 | ||
815cccbf | 4259 | int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, |
2c3c031c | 4260 | struct net_device *dev, u16 mode, |
7d4f8d87 SF |
4261 | u32 flags, u32 mask, int nlflags, |
4262 | u32 filter_mask, | |
4263 | int (*vlan_fill)(struct sk_buff *skb, | |
4264 | struct net_device *dev, | |
4265 | u32 filter_mask)) | |
815cccbf JF |
4266 | { |
4267 | struct nlmsghdr *nlh; | |
4268 | struct ifinfomsg *ifm; | |
4269 | struct nlattr *br_afspec; | |
2c3c031c | 4270 | struct nlattr *protinfo; |
815cccbf | 4271 | u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; |
898e5061 | 4272 | struct net_device *br_dev = netdev_master_upper_dev_get(dev); |
7d4f8d87 | 4273 | int err = 0; |
815cccbf | 4274 | |
46c264da | 4275 | nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); |
815cccbf JF |
4276 | if (nlh == NULL) |
4277 | return -EMSGSIZE; | |
4278 | ||
4279 | ifm = nlmsg_data(nlh); | |
4280 | ifm->ifi_family = AF_BRIDGE; | |
4281 | ifm->__ifi_pad = 0; | |
4282 | ifm->ifi_type = dev->type; | |
4283 | ifm->ifi_index = dev->ifindex; | |
4284 | ifm->ifi_flags = dev_get_flags(dev); | |
4285 | ifm->ifi_change = 0; | |
4286 | ||
4287 | ||
4288 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || | |
4289 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || | |
4290 | nla_put_u8(skb, IFLA_OPERSTATE, operstate) || | |
898e5061 JP |
4291 | (br_dev && |
4292 | nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || | |
815cccbf JF |
4293 | (dev->addr_len && |
4294 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || | |
a54acb3a ND |
4295 | (dev->ifindex != dev_get_iflink(dev) && |
4296 | nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) | |
815cccbf JF |
4297 | goto nla_put_failure; |
4298 | ||
ae0be8de | 4299 | br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC); |
815cccbf JF |
4300 | if (!br_afspec) |
4301 | goto nla_put_failure; | |
4302 | ||
1d460b98 | 4303 | if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { |
815cccbf JF |
4304 | nla_nest_cancel(skb, br_afspec); |
4305 | goto nla_put_failure; | |
4306 | } | |
1d460b98 RP |
4307 | |
4308 | if (mode != BRIDGE_MODE_UNDEF) { | |
4309 | if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { | |
4310 | nla_nest_cancel(skb, br_afspec); | |
4311 | goto nla_put_failure; | |
4312 | } | |
4313 | } | |
7d4f8d87 SF |
4314 | if (vlan_fill) { |
4315 | err = vlan_fill(skb, dev, filter_mask); | |
4316 | if (err) { | |
4317 | nla_nest_cancel(skb, br_afspec); | |
4318 | goto nla_put_failure; | |
4319 | } | |
4320 | } | |
815cccbf JF |
4321 | nla_nest_end(skb, br_afspec); |
4322 | ||
ae0be8de | 4323 | protinfo = nla_nest_start(skb, IFLA_PROTINFO); |
2c3c031c SF |
4324 | if (!protinfo) |
4325 | goto nla_put_failure; | |
4326 | ||
4327 | if (brport_nla_put_flag(skb, flags, mask, | |
4328 | IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || | |
4329 | brport_nla_put_flag(skb, flags, mask, | |
4330 | IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || | |
4331 | brport_nla_put_flag(skb, flags, mask, | |
4332 | IFLA_BRPORT_FAST_LEAVE, | |
4333 | BR_MULTICAST_FAST_LEAVE) || | |
4334 | brport_nla_put_flag(skb, flags, mask, | |
4335 | IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || | |
4336 | brport_nla_put_flag(skb, flags, mask, | |
4337 | IFLA_BRPORT_LEARNING, BR_LEARNING) || | |
4338 | brport_nla_put_flag(skb, flags, mask, | |
4339 | IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || | |
4340 | brport_nla_put_flag(skb, flags, mask, | |
4341 | IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || | |
4342 | brport_nla_put_flag(skb, flags, mask, | |
4343 | IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { | |
4344 | nla_nest_cancel(skb, protinfo); | |
4345 | goto nla_put_failure; | |
4346 | } | |
4347 | ||
4348 | nla_nest_end(skb, protinfo); | |
4349 | ||
053c095a JB |
4350 | nlmsg_end(skb, nlh); |
4351 | return 0; | |
815cccbf JF |
4352 | nla_put_failure: |
4353 | nlmsg_cancel(skb, nlh); | |
7d4f8d87 | 4354 | return err ? err : -EMSGSIZE; |
815cccbf | 4355 | } |
7d4f8d87 | 4356 | EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); |
815cccbf | 4357 | |
2d011be8 DA |
4358 | static int valid_bridge_getlink_req(const struct nlmsghdr *nlh, |
4359 | bool strict_check, u32 *filter_mask, | |
4360 | struct netlink_ext_ack *extack) | |
4361 | { | |
4362 | struct nlattr *tb[IFLA_MAX+1]; | |
4363 | int err, i; | |
4364 | ||
4365 | if (strict_check) { | |
4366 | struct ifinfomsg *ifm; | |
4367 | ||
4368 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { | |
4369 | NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump"); | |
4370 | return -EINVAL; | |
4371 | } | |
4372 | ||
4373 | ifm = nlmsg_data(nlh); | |
4374 | if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || | |
4375 | ifm->ifi_change || ifm->ifi_index) { | |
4376 | NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request"); | |
4377 | return -EINVAL; | |
4378 | } | |
4379 | ||
8cb08174 JB |
4380 | err = nlmsg_parse_deprecated_strict(nlh, |
4381 | sizeof(struct ifinfomsg), | |
4382 | tb, IFLA_MAX, ifla_policy, | |
4383 | extack); | |
2d011be8 | 4384 | } else { |
8cb08174 JB |
4385 | err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), |
4386 | tb, IFLA_MAX, ifla_policy, | |
4387 | extack); | |
2d011be8 DA |
4388 | } |
4389 | if (err < 0) | |
4390 | return err; | |
4391 | ||
4392 | /* new attributes should only be added with strict checking */ | |
4393 | for (i = 0; i <= IFLA_MAX; ++i) { | |
4394 | if (!tb[i]) | |
4395 | continue; | |
4396 | ||
4397 | switch (i) { | |
4398 | case IFLA_EXT_MASK: | |
4399 | *filter_mask = nla_get_u32(tb[i]); | |
4400 | break; | |
4401 | default: | |
4402 | if (strict_check) { | |
4403 | NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request"); | |
4404 | return -EINVAL; | |
4405 | } | |
4406 | } | |
4407 | } | |
4408 | ||
4409 | return 0; | |
4410 | } | |
4411 | ||
e5a55a89 JF |
4412 | static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) |
4413 | { | |
2d011be8 | 4414 | const struct nlmsghdr *nlh = cb->nlh; |
e5a55a89 JF |
4415 | struct net *net = sock_net(skb->sk); |
4416 | struct net_device *dev; | |
4417 | int idx = 0; | |
4418 | u32 portid = NETLINK_CB(cb->skb).portid; | |
2d011be8 | 4419 | u32 seq = nlh->nlmsg_seq; |
6cbdceeb | 4420 | u32 filter_mask = 0; |
d64f69b0 | 4421 | int err; |
6cbdceeb | 4422 | |
2d011be8 DA |
4423 | err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask, |
4424 | cb->extack); | |
4425 | if (err < 0 && cb->strict_check) | |
4426 | return err; | |
e5a55a89 JF |
4427 | |
4428 | rcu_read_lock(); | |
4429 | for_each_netdev_rcu(net, dev) { | |
4430 | const struct net_device_ops *ops = dev->netdev_ops; | |
898e5061 | 4431 | struct net_device *br_dev = netdev_master_upper_dev_get(dev); |
e5a55a89 | 4432 | |
898e5061 | 4433 | if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { |
d64f69b0 RP |
4434 | if (idx >= cb->args[0]) { |
4435 | err = br_dev->netdev_ops->ndo_bridge_getlink( | |
4436 | skb, portid, seq, dev, | |
4437 | filter_mask, NLM_F_MULTI); | |
f6c5775f DA |
4438 | if (err < 0 && err != -EOPNOTSUPP) { |
4439 | if (likely(skb->len)) | |
4440 | break; | |
4441 | ||
4442 | goto out_err; | |
4443 | } | |
d64f69b0 | 4444 | } |
25b1e679 | 4445 | idx++; |
e5a55a89 JF |
4446 | } |
4447 | ||
4448 | if (ops->ndo_bridge_getlink) { | |
d64f69b0 RP |
4449 | if (idx >= cb->args[0]) { |
4450 | err = ops->ndo_bridge_getlink(skb, portid, | |
4451 | seq, dev, | |
4452 | filter_mask, | |
4453 | NLM_F_MULTI); | |
f6c5775f DA |
4454 | if (err < 0 && err != -EOPNOTSUPP) { |
4455 | if (likely(skb->len)) | |
4456 | break; | |
4457 | ||
4458 | goto out_err; | |
4459 | } | |
d64f69b0 | 4460 | } |
25b1e679 | 4461 | idx++; |
e5a55a89 JF |
4462 | } |
4463 | } | |
f6c5775f DA |
4464 | err = skb->len; |
4465 | out_err: | |
e5a55a89 JF |
4466 | rcu_read_unlock(); |
4467 | cb->args[0] = idx; | |
4468 | ||
f6c5775f | 4469 | return err; |
e5a55a89 JF |
4470 | } |
4471 | ||
2469ffd7 JF |
4472 | static inline size_t bridge_nlmsg_size(void) |
4473 | { | |
4474 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
4475 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
4476 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ | |
4477 | + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ | |
4478 | + nla_total_size(sizeof(u32)) /* IFLA_MTU */ | |
4479 | + nla_total_size(sizeof(u32)) /* IFLA_LINK */ | |
4480 | + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ | |
4481 | + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ | |
4482 | + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ | |
4483 | + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ | |
4484 | + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ | |
4485 | } | |
4486 | ||
02dba438 | 4487 | static int rtnl_bridge_notify(struct net_device *dev) |
2469ffd7 JF |
4488 | { |
4489 | struct net *net = dev_net(dev); | |
2469ffd7 JF |
4490 | struct sk_buff *skb; |
4491 | int err = -EOPNOTSUPP; | |
4492 | ||
02dba438 RP |
4493 | if (!dev->netdev_ops->ndo_bridge_getlink) |
4494 | return 0; | |
4495 | ||
2469ffd7 JF |
4496 | skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); |
4497 | if (!skb) { | |
4498 | err = -ENOMEM; | |
4499 | goto errout; | |
4500 | } | |
4501 | ||
46c264da | 4502 | err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); |
02dba438 RP |
4503 | if (err < 0) |
4504 | goto errout; | |
2469ffd7 | 4505 | |
59ccaaaa RP |
4506 | if (!skb->len) |
4507 | goto errout; | |
4508 | ||
2469ffd7 JF |
4509 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); |
4510 | return 0; | |
4511 | errout: | |
4512 | WARN_ON(err == -EMSGSIZE); | |
4513 | kfree_skb(skb); | |
59ccaaaa RP |
4514 | if (err) |
4515 | rtnl_set_sk_err(net, RTNLGRP_LINK, err); | |
2469ffd7 JF |
4516 | return err; |
4517 | } | |
4518 | ||
c21ef3e3 DA |
4519 | static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, |
4520 | struct netlink_ext_ack *extack) | |
e5a55a89 JF |
4521 | { |
4522 | struct net *net = sock_net(skb->sk); | |
4523 | struct ifinfomsg *ifm; | |
4524 | struct net_device *dev; | |
2469ffd7 JF |
4525 | struct nlattr *br_spec, *attr = NULL; |
4526 | int rem, err = -EOPNOTSUPP; | |
4de8b413 | 4527 | u16 flags = 0; |
c38e01b8 | 4528 | bool have_flags = false; |
e5a55a89 JF |
4529 | |
4530 | if (nlmsg_len(nlh) < sizeof(*ifm)) | |
4531 | return -EINVAL; | |
4532 | ||
4533 | ifm = nlmsg_data(nlh); | |
4534 | if (ifm->ifi_family != AF_BRIDGE) | |
4535 | return -EPFNOSUPPORT; | |
4536 | ||
4537 | dev = __dev_get_by_index(net, ifm->ifi_index); | |
4538 | if (!dev) { | |
b88d12e4 | 4539 | NL_SET_ERR_MSG(extack, "unknown ifindex"); |
e5a55a89 JF |
4540 | return -ENODEV; |
4541 | } | |
4542 | ||
2469ffd7 JF |
4543 | br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); |
4544 | if (br_spec) { | |
4545 | nla_for_each_nested(attr, br_spec, rem) { | |
4546 | if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { | |
6e8d1c55 TG |
4547 | if (nla_len(attr) < sizeof(flags)) |
4548 | return -EINVAL; | |
4549 | ||
c38e01b8 | 4550 | have_flags = true; |
2469ffd7 JF |
4551 | flags = nla_get_u16(attr); |
4552 | break; | |
4553 | } | |
4554 | } | |
4555 | } | |
4556 | ||
4557 | if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { | |
898e5061 JP |
4558 | struct net_device *br_dev = netdev_master_upper_dev_get(dev); |
4559 | ||
4560 | if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { | |
2469ffd7 JF |
4561 | err = -EOPNOTSUPP; |
4562 | goto out; | |
4563 | } | |
4564 | ||
2fd527b7 PM |
4565 | err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags, |
4566 | extack); | |
e5a55a89 JF |
4567 | if (err) |
4568 | goto out; | |
2469ffd7 JF |
4569 | |
4570 | flags &= ~BRIDGE_FLAGS_MASTER; | |
e5a55a89 JF |
4571 | } |
4572 | ||
2469ffd7 JF |
4573 | if ((flags & BRIDGE_FLAGS_SELF)) { |
4574 | if (!dev->netdev_ops->ndo_bridge_setlink) | |
4575 | err = -EOPNOTSUPP; | |
4576 | else | |
add511b3 | 4577 | err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, |
2fd527b7 PM |
4578 | flags, |
4579 | extack); | |
02dba438 | 4580 | if (!err) { |
2469ffd7 | 4581 | flags &= ~BRIDGE_FLAGS_SELF; |
02dba438 RP |
4582 | |
4583 | /* Generate event to notify upper layer of bridge | |
4584 | * change | |
4585 | */ | |
4586 | err = rtnl_bridge_notify(dev); | |
4587 | } | |
2469ffd7 | 4588 | } |
e5a55a89 | 4589 | |
c38e01b8 | 4590 | if (have_flags) |
2469ffd7 | 4591 | memcpy(nla_data(attr), &flags, sizeof(flags)); |
e5a55a89 JF |
4592 | out: |
4593 | return err; | |
4594 | } | |
4595 | ||
c21ef3e3 DA |
4596 | static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, |
4597 | struct netlink_ext_ack *extack) | |
407af329 VY |
4598 | { |
4599 | struct net *net = sock_net(skb->sk); | |
4600 | struct ifinfomsg *ifm; | |
4601 | struct net_device *dev; | |
4602 | struct nlattr *br_spec, *attr = NULL; | |
4603 | int rem, err = -EOPNOTSUPP; | |
4de8b413 | 4604 | u16 flags = 0; |
407af329 VY |
4605 | bool have_flags = false; |
4606 | ||
4607 | if (nlmsg_len(nlh) < sizeof(*ifm)) | |
4608 | return -EINVAL; | |
4609 | ||
4610 | ifm = nlmsg_data(nlh); | |
4611 | if (ifm->ifi_family != AF_BRIDGE) | |
4612 | return -EPFNOSUPPORT; | |
4613 | ||
4614 | dev = __dev_get_by_index(net, ifm->ifi_index); | |
4615 | if (!dev) { | |
b88d12e4 | 4616 | NL_SET_ERR_MSG(extack, "unknown ifindex"); |
407af329 VY |
4617 | return -ENODEV; |
4618 | } | |
4619 | ||
4620 | br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); | |
4621 | if (br_spec) { | |
4622 | nla_for_each_nested(attr, br_spec, rem) { | |
4623 | if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { | |
6e8d1c55 TG |
4624 | if (nla_len(attr) < sizeof(flags)) |
4625 | return -EINVAL; | |
4626 | ||
407af329 VY |
4627 | have_flags = true; |
4628 | flags = nla_get_u16(attr); | |
4629 | break; | |
4630 | } | |
4631 | } | |
4632 | } | |
4633 | ||
407af329 VY |
4634 | if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { |
4635 | struct net_device *br_dev = netdev_master_upper_dev_get(dev); | |
4636 | ||
4637 | if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { | |
4638 | err = -EOPNOTSUPP; | |
4639 | goto out; | |
4640 | } | |
4641 | ||
add511b3 | 4642 | err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); |
407af329 VY |
4643 | if (err) |
4644 | goto out; | |
4645 | ||
4646 | flags &= ~BRIDGE_FLAGS_MASTER; | |
4647 | } | |
4648 | ||
4649 | if ((flags & BRIDGE_FLAGS_SELF)) { | |
4650 | if (!dev->netdev_ops->ndo_bridge_dellink) | |
4651 | err = -EOPNOTSUPP; | |
4652 | else | |
add511b3 RP |
4653 | err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, |
4654 | flags); | |
407af329 | 4655 | |
02dba438 | 4656 | if (!err) { |
407af329 | 4657 | flags &= ~BRIDGE_FLAGS_SELF; |
02dba438 RP |
4658 | |
4659 | /* Generate event to notify upper layer of bridge | |
4660 | * change | |
4661 | */ | |
4662 | err = rtnl_bridge_notify(dev); | |
4663 | } | |
407af329 VY |
4664 | } |
4665 | ||
4666 | if (have_flags) | |
4667 | memcpy(nla_data(attr), &flags, sizeof(flags)); | |
407af329 VY |
4668 | out: |
4669 | return err; | |
4670 | } | |
4671 | ||
e8872a25 NA |
4672 | static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) |
4673 | { | |
4674 | return (mask & IFLA_STATS_FILTER_BIT(attrid)) && | |
4675 | (!idxattr || idxattr == attrid); | |
4676 | } | |
4677 | ||
69ae6ad2 NF |
4678 | #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) |
4679 | static int rtnl_get_offload_stats_attr_size(int attr_id) | |
4680 | { | |
4681 | switch (attr_id) { | |
4682 | case IFLA_OFFLOAD_XSTATS_CPU_HIT: | |
4683 | return sizeof(struct rtnl_link_stats64); | |
4684 | } | |
4685 | ||
4686 | return 0; | |
4687 | } | |
4688 | ||
4689 | static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, | |
4690 | int *prividx) | |
4691 | { | |
4692 | struct nlattr *attr = NULL; | |
4693 | int attr_id, size; | |
4694 | void *attr_data; | |
4695 | int err; | |
4696 | ||
4697 | if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && | |
4698 | dev->netdev_ops->ndo_get_offload_stats)) | |
4699 | return -ENODATA; | |
4700 | ||
4701 | for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; | |
4702 | attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { | |
4703 | if (attr_id < *prividx) | |
4704 | continue; | |
4705 | ||
4706 | size = rtnl_get_offload_stats_attr_size(attr_id); | |
4707 | if (!size) | |
4708 | continue; | |
4709 | ||
3df5b3c6 | 4710 | if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) |
69ae6ad2 NF |
4711 | continue; |
4712 | ||
4713 | attr = nla_reserve_64bit(skb, attr_id, size, | |
4714 | IFLA_OFFLOAD_XSTATS_UNSPEC); | |
4715 | if (!attr) | |
4716 | goto nla_put_failure; | |
4717 | ||
4718 | attr_data = nla_data(attr); | |
4719 | memset(attr_data, 0, size); | |
4720 | err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, | |
4721 | attr_data); | |
4722 | if (err) | |
4723 | goto get_offload_stats_failure; | |
4724 | } | |
4725 | ||
4726 | if (!attr) | |
4727 | return -ENODATA; | |
4728 | ||
4729 | *prividx = 0; | |
4730 | return 0; | |
4731 | ||
4732 | nla_put_failure: | |
4733 | err = -EMSGSIZE; | |
4734 | get_offload_stats_failure: | |
4735 | *prividx = attr_id; | |
4736 | return err; | |
4737 | } | |
4738 | ||
4739 | static int rtnl_get_offload_stats_size(const struct net_device *dev) | |
4740 | { | |
4741 | int nla_size = 0; | |
4742 | int attr_id; | |
4743 | int size; | |
4744 | ||
4745 | if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && | |
4746 | dev->netdev_ops->ndo_get_offload_stats)) | |
4747 | return 0; | |
4748 | ||
4749 | for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; | |
4750 | attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { | |
3df5b3c6 | 4751 | if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) |
69ae6ad2 NF |
4752 | continue; |
4753 | size = rtnl_get_offload_stats_attr_size(attr_id); | |
4754 | nla_size += nla_total_size_64bit(size); | |
4755 | } | |
4756 | ||
4757 | if (nla_size != 0) | |
4758 | nla_size += nla_total_size(0); | |
4759 | ||
4760 | return nla_size; | |
4761 | } | |
4762 | ||
10c9ead9 RP |
4763 | static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, |
4764 | int type, u32 pid, u32 seq, u32 change, | |
e8872a25 NA |
4765 | unsigned int flags, unsigned int filter_mask, |
4766 | int *idxattr, int *prividx) | |
10c9ead9 RP |
4767 | { |
4768 | struct if_stats_msg *ifsm; | |
4769 | struct nlmsghdr *nlh; | |
4770 | struct nlattr *attr; | |
e8872a25 | 4771 | int s_prividx = *prividx; |
69ae6ad2 | 4772 | int err; |
10c9ead9 RP |
4773 | |
4774 | ASSERT_RTNL(); | |
4775 | ||
4776 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); | |
4777 | if (!nlh) | |
4778 | return -EMSGSIZE; | |
4779 | ||
4780 | ifsm = nlmsg_data(nlh); | |
ce024f42 NA |
4781 | ifsm->family = PF_UNSPEC; |
4782 | ifsm->pad1 = 0; | |
4783 | ifsm->pad2 = 0; | |
10c9ead9 RP |
4784 | ifsm->ifindex = dev->ifindex; |
4785 | ifsm->filter_mask = filter_mask; | |
4786 | ||
e8872a25 | 4787 | if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { |
10c9ead9 | 4788 | struct rtnl_link_stats64 *sp; |
10c9ead9 | 4789 | |
58414d32 ND |
4790 | attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, |
4791 | sizeof(struct rtnl_link_stats64), | |
4792 | IFLA_STATS_UNSPEC); | |
10c9ead9 RP |
4793 | if (!attr) |
4794 | goto nla_put_failure; | |
4795 | ||
4796 | sp = nla_data(attr); | |
4797 | dev_get_stats(dev, sp); | |
4798 | } | |
4799 | ||
97a47fac NA |
4800 | if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { |
4801 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
4802 | ||
4803 | if (ops && ops->fill_linkxstats) { | |
97a47fac | 4804 | *idxattr = IFLA_STATS_LINK_XSTATS; |
ae0be8de MK |
4805 | attr = nla_nest_start_noflag(skb, |
4806 | IFLA_STATS_LINK_XSTATS); | |
97a47fac NA |
4807 | if (!attr) |
4808 | goto nla_put_failure; | |
4809 | ||
80e73cc5 NA |
4810 | err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); |
4811 | nla_nest_end(skb, attr); | |
4812 | if (err) | |
4813 | goto nla_put_failure; | |
4814 | *idxattr = 0; | |
4815 | } | |
4816 | } | |
4817 | ||
4818 | if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, | |
4819 | *idxattr)) { | |
4820 | const struct rtnl_link_ops *ops = NULL; | |
4821 | const struct net_device *master; | |
4822 | ||
4823 | master = netdev_master_upper_dev_get(dev); | |
4824 | if (master) | |
4825 | ops = master->rtnl_link_ops; | |
4826 | if (ops && ops->fill_linkxstats) { | |
80e73cc5 | 4827 | *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; |
ae0be8de MK |
4828 | attr = nla_nest_start_noflag(skb, |
4829 | IFLA_STATS_LINK_XSTATS_SLAVE); | |
80e73cc5 NA |
4830 | if (!attr) |
4831 | goto nla_put_failure; | |
4832 | ||
4833 | err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); | |
97a47fac NA |
4834 | nla_nest_end(skb, attr); |
4835 | if (err) | |
4836 | goto nla_put_failure; | |
4837 | *idxattr = 0; | |
4838 | } | |
4839 | } | |
4840 | ||
69ae6ad2 NF |
4841 | if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, |
4842 | *idxattr)) { | |
4843 | *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; | |
ae0be8de MK |
4844 | attr = nla_nest_start_noflag(skb, |
4845 | IFLA_STATS_LINK_OFFLOAD_XSTATS); | |
69ae6ad2 NF |
4846 | if (!attr) |
4847 | goto nla_put_failure; | |
4848 | ||
4849 | err = rtnl_get_offload_stats(skb, dev, prividx); | |
4850 | if (err == -ENODATA) | |
4851 | nla_nest_cancel(skb, attr); | |
4852 | else | |
4853 | nla_nest_end(skb, attr); | |
4854 | ||
4855 | if (err && err != -ENODATA) | |
4856 | goto nla_put_failure; | |
4857 | *idxattr = 0; | |
4858 | } | |
4859 | ||
aefb4d4a RS |
4860 | if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { |
4861 | struct rtnl_af_ops *af_ops; | |
4862 | ||
4863 | *idxattr = IFLA_STATS_AF_SPEC; | |
ae0be8de | 4864 | attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC); |
aefb4d4a RS |
4865 | if (!attr) |
4866 | goto nla_put_failure; | |
4867 | ||
5fa85a09 FW |
4868 | rcu_read_lock(); |
4869 | list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { | |
aefb4d4a RS |
4870 | if (af_ops->fill_stats_af) { |
4871 | struct nlattr *af; | |
4872 | int err; | |
4873 | ||
ae0be8de MK |
4874 | af = nla_nest_start_noflag(skb, |
4875 | af_ops->family); | |
5fa85a09 FW |
4876 | if (!af) { |
4877 | rcu_read_unlock(); | |
aefb4d4a | 4878 | goto nla_put_failure; |
5fa85a09 | 4879 | } |
aefb4d4a RS |
4880 | err = af_ops->fill_stats_af(skb, dev); |
4881 | ||
5fa85a09 | 4882 | if (err == -ENODATA) { |
aefb4d4a | 4883 | nla_nest_cancel(skb, af); |
5fa85a09 FW |
4884 | } else if (err < 0) { |
4885 | rcu_read_unlock(); | |
aefb4d4a | 4886 | goto nla_put_failure; |
5fa85a09 | 4887 | } |
aefb4d4a RS |
4888 | |
4889 | nla_nest_end(skb, af); | |
4890 | } | |
4891 | } | |
5fa85a09 | 4892 | rcu_read_unlock(); |
aefb4d4a RS |
4893 | |
4894 | nla_nest_end(skb, attr); | |
4895 | ||
4896 | *idxattr = 0; | |
4897 | } | |
4898 | ||
10c9ead9 RP |
4899 | nlmsg_end(skb, nlh); |
4900 | ||
4901 | return 0; | |
4902 | ||
4903 | nla_put_failure: | |
e8872a25 NA |
4904 | /* not a multi message or no progress mean a real error */ |
4905 | if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) | |
4906 | nlmsg_cancel(skb, nlh); | |
4907 | else | |
4908 | nlmsg_end(skb, nlh); | |
10c9ead9 RP |
4909 | |
4910 | return -EMSGSIZE; | |
4911 | } | |
4912 | ||
10c9ead9 RP |
4913 | static size_t if_nlmsg_stats_size(const struct net_device *dev, |
4914 | u32 filter_mask) | |
4915 | { | |
4916 | size_t size = 0; | |
4917 | ||
e8872a25 | 4918 | if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) |
10c9ead9 RP |
4919 | size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); |
4920 | ||
97a47fac NA |
4921 | if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { |
4922 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
80e73cc5 | 4923 | int attr = IFLA_STATS_LINK_XSTATS; |
97a47fac NA |
4924 | |
4925 | if (ops && ops->get_linkxstats_size) { | |
80e73cc5 NA |
4926 | size += nla_total_size(ops->get_linkxstats_size(dev, |
4927 | attr)); | |
97a47fac NA |
4928 | /* for IFLA_STATS_LINK_XSTATS */ |
4929 | size += nla_total_size(0); | |
4930 | } | |
4931 | } | |
4932 | ||
80e73cc5 NA |
4933 | if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { |
4934 | struct net_device *_dev = (struct net_device *)dev; | |
4935 | const struct rtnl_link_ops *ops = NULL; | |
4936 | const struct net_device *master; | |
4937 | ||
4938 | /* netdev_master_upper_dev_get can't take const */ | |
4939 | master = netdev_master_upper_dev_get(_dev); | |
4940 | if (master) | |
4941 | ops = master->rtnl_link_ops; | |
4942 | if (ops && ops->get_linkxstats_size) { | |
4943 | int attr = IFLA_STATS_LINK_XSTATS_SLAVE; | |
4944 | ||
4945 | size += nla_total_size(ops->get_linkxstats_size(dev, | |
4946 | attr)); | |
4947 | /* for IFLA_STATS_LINK_XSTATS_SLAVE */ | |
4948 | size += nla_total_size(0); | |
4949 | } | |
4950 | } | |
4951 | ||
69ae6ad2 NF |
4952 | if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) |
4953 | size += rtnl_get_offload_stats_size(dev); | |
4954 | ||
aefb4d4a RS |
4955 | if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { |
4956 | struct rtnl_af_ops *af_ops; | |
4957 | ||
4958 | /* for IFLA_STATS_AF_SPEC */ | |
4959 | size += nla_total_size(0); | |
4960 | ||
5fa85a09 FW |
4961 | rcu_read_lock(); |
4962 | list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { | |
aefb4d4a RS |
4963 | if (af_ops->get_stats_af_size) { |
4964 | size += nla_total_size( | |
4965 | af_ops->get_stats_af_size(dev)); | |
4966 | ||
4967 | /* for AF_* */ | |
4968 | size += nla_total_size(0); | |
4969 | } | |
4970 | } | |
5fa85a09 | 4971 | rcu_read_unlock(); |
aefb4d4a RS |
4972 | } |
4973 | ||
10c9ead9 RP |
4974 | return size; |
4975 | } | |
4976 | ||
51bc860d JK |
4977 | static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check, |
4978 | bool is_dump, struct netlink_ext_ack *extack) | |
4979 | { | |
4980 | struct if_stats_msg *ifsm; | |
4981 | ||
69f23a09 | 4982 | if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) { |
51bc860d JK |
4983 | NL_SET_ERR_MSG(extack, "Invalid header for stats dump"); |
4984 | return -EINVAL; | |
4985 | } | |
4986 | ||
4987 | if (!strict_check) | |
4988 | return 0; | |
4989 | ||
4990 | ifsm = nlmsg_data(nlh); | |
4991 | ||
4992 | /* only requests using strict checks can pass data to influence | |
4993 | * the dump. The legacy exception is filter_mask. | |
4994 | */ | |
4995 | if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) { | |
4996 | NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request"); | |
4997 | return -EINVAL; | |
4998 | } | |
4999 | if (nlmsg_attrlen(nlh, sizeof(*ifsm))) { | |
5000 | NL_SET_ERR_MSG(extack, "Invalid attributes after stats header"); | |
5001 | return -EINVAL; | |
5002 | } | |
6300acb2 JK |
5003 | if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) { |
5004 | NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask"); | |
5005 | return -EINVAL; | |
5006 | } | |
51bc860d JK |
5007 | |
5008 | return 0; | |
5009 | } | |
5010 | ||
c21ef3e3 DA |
5011 | static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh, |
5012 | struct netlink_ext_ack *extack) | |
10c9ead9 RP |
5013 | { |
5014 | struct net *net = sock_net(skb->sk); | |
10c9ead9 | 5015 | struct net_device *dev = NULL; |
e8872a25 NA |
5016 | int idxattr = 0, prividx = 0; |
5017 | struct if_stats_msg *ifsm; | |
10c9ead9 RP |
5018 | struct sk_buff *nskb; |
5019 | u32 filter_mask; | |
5020 | int err; | |
5021 | ||
51bc860d JK |
5022 | err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb), |
5023 | false, extack); | |
5024 | if (err) | |
5025 | return err; | |
4775cc1f | 5026 | |
10c9ead9 RP |
5027 | ifsm = nlmsg_data(nlh); |
5028 | if (ifsm->ifindex > 0) | |
5029 | dev = __dev_get_by_index(net, ifsm->ifindex); | |
5030 | else | |
5031 | return -EINVAL; | |
5032 | ||
5033 | if (!dev) | |
5034 | return -ENODEV; | |
5035 | ||
5036 | filter_mask = ifsm->filter_mask; | |
5037 | if (!filter_mask) | |
5038 | return -EINVAL; | |
5039 | ||
5040 | nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); | |
5041 | if (!nskb) | |
5042 | return -ENOBUFS; | |
5043 | ||
5044 | err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, | |
5045 | NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, | |
e8872a25 | 5046 | 0, filter_mask, &idxattr, &prividx); |
10c9ead9 RP |
5047 | if (err < 0) { |
5048 | /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ | |
5049 | WARN_ON(err == -EMSGSIZE); | |
5050 | kfree_skb(nskb); | |
5051 | } else { | |
5052 | err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); | |
5053 | } | |
5054 | ||
5055 | return err; | |
5056 | } | |
5057 | ||
5058 | static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) | |
5059 | { | |
841891ec | 5060 | struct netlink_ext_ack *extack = cb->extack; |
e8872a25 | 5061 | int h, s_h, err, s_idx, s_idxattr, s_prividx; |
10c9ead9 | 5062 | struct net *net = sock_net(skb->sk); |
e8872a25 | 5063 | unsigned int flags = NLM_F_MULTI; |
10c9ead9 | 5064 | struct if_stats_msg *ifsm; |
10c9ead9 | 5065 | struct hlist_head *head; |
e8872a25 | 5066 | struct net_device *dev; |
10c9ead9 | 5067 | u32 filter_mask = 0; |
e8872a25 | 5068 | int idx = 0; |
10c9ead9 RP |
5069 | |
5070 | s_h = cb->args[0]; | |
5071 | s_idx = cb->args[1]; | |
e8872a25 NA |
5072 | s_idxattr = cb->args[2]; |
5073 | s_prividx = cb->args[3]; | |
10c9ead9 RP |
5074 | |
5075 | cb->seq = net->dev_base_seq; | |
5076 | ||
51bc860d JK |
5077 | err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack); |
5078 | if (err) | |
5079 | return err; | |
4775cc1f | 5080 | |
10c9ead9 RP |
5081 | ifsm = nlmsg_data(cb->nlh); |
5082 | filter_mask = ifsm->filter_mask; | |
841891ec DA |
5083 | if (!filter_mask) { |
5084 | NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump"); | |
10c9ead9 | 5085 | return -EINVAL; |
841891ec | 5086 | } |
10c9ead9 RP |
5087 | |
5088 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
5089 | idx = 0; | |
5090 | head = &net->dev_index_head[h]; | |
5091 | hlist_for_each_entry(dev, head, index_hlist) { | |
5092 | if (idx < s_idx) | |
5093 | goto cont; | |
5094 | err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, | |
5095 | NETLINK_CB(cb->skb).portid, | |
5096 | cb->nlh->nlmsg_seq, 0, | |
e8872a25 NA |
5097 | flags, filter_mask, |
5098 | &s_idxattr, &s_prividx); | |
10c9ead9 RP |
5099 | /* If we ran out of room on the first message, |
5100 | * we're in trouble | |
5101 | */ | |
5102 | WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); | |
5103 | ||
5104 | if (err < 0) | |
5105 | goto out; | |
e8872a25 NA |
5106 | s_prividx = 0; |
5107 | s_idxattr = 0; | |
10c9ead9 RP |
5108 | nl_dump_check_consistent(cb, nlmsg_hdr(skb)); |
5109 | cont: | |
5110 | idx++; | |
5111 | } | |
5112 | } | |
5113 | out: | |
e8872a25 NA |
5114 | cb->args[3] = s_prividx; |
5115 | cb->args[2] = s_idxattr; | |
10c9ead9 RP |
5116 | cb->args[1] = idx; |
5117 | cb->args[0] = h; | |
5118 | ||
5119 | return skb->len; | |
5120 | } | |
5121 | ||
1da177e4 LT |
5122 | /* Process one rtnetlink message. */ |
5123 | ||
2d4bc933 JB |
5124 | static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, |
5125 | struct netlink_ext_ack *extack) | |
1da177e4 | 5126 | { |
3b1e0a65 | 5127 | struct net *net = sock_net(skb->sk); |
addf9b90 | 5128 | struct rtnl_link *link; |
e4202511 | 5129 | struct module *owner; |
6853dd48 | 5130 | int err = -EOPNOTSUPP; |
e2849863 | 5131 | rtnl_doit_func doit; |
62256f98 | 5132 | unsigned int flags; |
617cfc75 | 5133 | int kind; |
1da177e4 LT |
5134 | int family; |
5135 | int type; | |
1da177e4 | 5136 | |
1da177e4 | 5137 | type = nlh->nlmsg_type; |
1da177e4 | 5138 | if (type > RTM_MAX) |
038890fe | 5139 | return -EOPNOTSUPP; |
1da177e4 LT |
5140 | |
5141 | type -= RTM_BASE; | |
5142 | ||
5143 | /* All the messages must have at least 1 byte length */ | |
573ce260 | 5144 | if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) |
1da177e4 LT |
5145 | return 0; |
5146 | ||
573ce260 | 5147 | family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; |
1da177e4 LT |
5148 | kind = type&3; |
5149 | ||
90f62cf3 | 5150 | if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) |
1d00a4eb | 5151 | return -EPERM; |
1da177e4 | 5152 | |
6853dd48 | 5153 | rcu_read_lock(); |
b8f3ab42 | 5154 | if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { |
97c53cac | 5155 | struct sock *rtnl; |
e2849863 | 5156 | rtnl_dumpit_func dumpit; |
c7ac8679 | 5157 | u16 min_dump_alloc = 0; |
1da177e4 | 5158 | |
addf9b90 FW |
5159 | link = rtnl_get_link(family, type); |
5160 | if (!link || !link->dumpit) { | |
6853dd48 | 5161 | family = PF_UNSPEC; |
addf9b90 FW |
5162 | link = rtnl_get_link(family, type); |
5163 | if (!link || !link->dumpit) | |
6853dd48 FW |
5164 | goto err_unlock; |
5165 | } | |
e4202511 | 5166 | owner = link->owner; |
addf9b90 | 5167 | dumpit = link->dumpit; |
e1fa6d21 | 5168 | |
5c2bb9b6 | 5169 | if (type == RTM_GETLINK - RTM_BASE) |
e1fa6d21 | 5170 | min_dump_alloc = rtnl_calcit(skb, nlh); |
9ac4a169 | 5171 | |
e4202511 FW |
5172 | err = 0; |
5173 | /* need to do this before rcu_read_unlock() */ | |
5174 | if (!try_module_get(owner)) | |
5175 | err = -EPROTONOSUPPORT; | |
5176 | ||
6853dd48 FW |
5177 | rcu_read_unlock(); |
5178 | ||
97c53cac | 5179 | rtnl = net->rtnl; |
e4202511 | 5180 | if (err == 0) { |
80d326fa PNA |
5181 | struct netlink_dump_control c = { |
5182 | .dump = dumpit, | |
5183 | .min_dump_alloc = min_dump_alloc, | |
e4202511 | 5184 | .module = owner, |
80d326fa PNA |
5185 | }; |
5186 | err = netlink_dump_start(rtnl, skb, nlh, &c); | |
e4202511 FW |
5187 | /* netlink_dump_start() will keep a reference on |
5188 | * module if dump is still in progress. | |
5189 | */ | |
5190 | module_put(owner); | |
80d326fa | 5191 | } |
2907c35f | 5192 | return err; |
1da177e4 LT |
5193 | } |
5194 | ||
addf9b90 FW |
5195 | link = rtnl_get_link(family, type); |
5196 | if (!link || !link->doit) { | |
8caa38b5 | 5197 | family = PF_UNSPEC; |
addf9b90 FW |
5198 | link = rtnl_get_link(PF_UNSPEC, type); |
5199 | if (!link || !link->doit) | |
5200 | goto out_unlock; | |
8caa38b5 FW |
5201 | } |
5202 | ||
e4202511 FW |
5203 | owner = link->owner; |
5204 | if (!try_module_get(owner)) { | |
5205 | err = -EPROTONOSUPPORT; | |
5206 | goto out_unlock; | |
5207 | } | |
5208 | ||
addf9b90 | 5209 | flags = link->flags; |
62256f98 | 5210 | if (flags & RTNL_FLAG_DOIT_UNLOCKED) { |
addf9b90 | 5211 | doit = link->doit; |
62256f98 FW |
5212 | rcu_read_unlock(); |
5213 | if (doit) | |
5214 | err = doit(skb, nlh, extack); | |
e4202511 | 5215 | module_put(owner); |
62256f98 FW |
5216 | return err; |
5217 | } | |
6853dd48 | 5218 | rcu_read_unlock(); |
1da177e4 | 5219 | |
6853dd48 | 5220 | rtnl_lock(); |
addf9b90 FW |
5221 | link = rtnl_get_link(family, type); |
5222 | if (link && link->doit) | |
5223 | err = link->doit(skb, nlh, extack); | |
0cc09020 | 5224 | rtnl_unlock(); |
addf9b90 | 5225 | |
e4202511 FW |
5226 | module_put(owner); |
5227 | ||
addf9b90 FW |
5228 | return err; |
5229 | ||
5230 | out_unlock: | |
5231 | rcu_read_unlock(); | |
0cc09020 FW |
5232 | return err; |
5233 | ||
5234 | err_unlock: | |
6853dd48 | 5235 | rcu_read_unlock(); |
0cc09020 | 5236 | return -EOPNOTSUPP; |
1da177e4 LT |
5237 | } |
5238 | ||
cd40b7d3 | 5239 | static void rtnetlink_rcv(struct sk_buff *skb) |
1da177e4 | 5240 | { |
cd40b7d3 | 5241 | netlink_rcv_skb(skb, &rtnetlink_rcv_msg); |
1da177e4 LT |
5242 | } |
5243 | ||
5f729eaa JG |
5244 | static int rtnetlink_bind(struct net *net, int group) |
5245 | { | |
5246 | switch (group) { | |
5247 | case RTNLGRP_IPV4_MROUTE_R: | |
5248 | case RTNLGRP_IPV6_MROUTE_R: | |
5249 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
5250 | return -EPERM; | |
5251 | break; | |
5252 | } | |
5253 | return 0; | |
5254 | } | |
5255 | ||
1da177e4 LT |
5256 | static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) |
5257 | { | |
351638e7 | 5258 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
e9dc8653 | 5259 | |
1da177e4 | 5260 | switch (event) { |
5138e86f | 5261 | case NETDEV_REBOOT: |
8a212589 | 5262 | case NETDEV_CHANGEMTU: |
3753654e | 5263 | case NETDEV_CHANGEADDR: |
5138e86f VY |
5264 | case NETDEV_CHANGENAME: |
5265 | case NETDEV_FEAT_CHANGE: | |
5266 | case NETDEV_BONDING_FAILOVER: | |
e6e66594 | 5267 | case NETDEV_POST_TYPE_CHANGE: |
5138e86f | 5268 | case NETDEV_NOTIFY_PEERS: |
dc709f37 | 5269 | case NETDEV_CHANGEUPPER: |
5138e86f | 5270 | case NETDEV_RESEND_IGMP: |
5138e86f | 5271 | case NETDEV_CHANGEINFODATA: |
eeda3fb9 | 5272 | case NETDEV_CHANGELOWERSTATE: |
ebdcf045 | 5273 | case NETDEV_CHANGE_TX_QUEUE_LEN: |
3d3ea5af | 5274 | rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event), |
38e01b30 | 5275 | GFP_KERNEL, NULL, 0); |
1da177e4 LT |
5276 | break; |
5277 | default: | |
1da177e4 LT |
5278 | break; |
5279 | } | |
5280 | return NOTIFY_DONE; | |
5281 | } | |
5282 | ||
5283 | static struct notifier_block rtnetlink_dev_notifier = { | |
5284 | .notifier_call = rtnetlink_event, | |
5285 | }; | |
5286 | ||
97c53cac | 5287 | |
2c8c1e72 | 5288 | static int __net_init rtnetlink_net_init(struct net *net) |
97c53cac DL |
5289 | { |
5290 | struct sock *sk; | |
a31f2d17 PNA |
5291 | struct netlink_kernel_cfg cfg = { |
5292 | .groups = RTNLGRP_MAX, | |
5293 | .input = rtnetlink_rcv, | |
5294 | .cb_mutex = &rtnl_mutex, | |
9785e10a | 5295 | .flags = NL_CFG_F_NONROOT_RECV, |
5f729eaa | 5296 | .bind = rtnetlink_bind, |
a31f2d17 PNA |
5297 | }; |
5298 | ||
9f00d977 | 5299 | sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); |
97c53cac DL |
5300 | if (!sk) |
5301 | return -ENOMEM; | |
97c53cac DL |
5302 | net->rtnl = sk; |
5303 | return 0; | |
5304 | } | |
5305 | ||
2c8c1e72 | 5306 | static void __net_exit rtnetlink_net_exit(struct net *net) |
97c53cac | 5307 | { |
775516bf DL |
5308 | netlink_kernel_release(net->rtnl); |
5309 | net->rtnl = NULL; | |
97c53cac DL |
5310 | } |
5311 | ||
5312 | static struct pernet_operations rtnetlink_net_ops = { | |
5313 | .init = rtnetlink_net_init, | |
5314 | .exit = rtnetlink_net_exit, | |
5315 | }; | |
5316 | ||
1da177e4 LT |
5317 | void __init rtnetlink_init(void) |
5318 | { | |
97c53cac | 5319 | if (register_pernet_subsys(&rtnetlink_net_ops)) |
1da177e4 | 5320 | panic("rtnetlink_init: cannot initialize rtnetlink\n"); |
97c53cac | 5321 | |
1da177e4 | 5322 | register_netdevice_notifier(&rtnetlink_dev_notifier); |
340d17fc | 5323 | |
c7ac8679 | 5324 | rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, |
b97bac64 FW |
5325 | rtnl_dump_ifinfo, 0); |
5326 | rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0); | |
5327 | rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0); | |
5328 | rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0); | |
687ad8cc | 5329 | |
b97bac64 FW |
5330 | rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0); |
5331 | rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0); | |
5332 | rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0); | |
77162022 | 5333 | |
b97bac64 FW |
5334 | rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0); |
5335 | rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0); | |
5b2f94b2 | 5336 | rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0); |
e5a55a89 | 5337 | |
b97bac64 FW |
5338 | rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0); |
5339 | rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0); | |
5340 | rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0); | |
10c9ead9 RP |
5341 | |
5342 | rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, | |
b97bac64 | 5343 | 0); |
1da177e4 | 5344 | } |