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1da177e4 LT |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * Routing netlink socket interface: protocol independent part. | |
7 | * | |
8 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * Fixes: | |
16 | * Vitaly E. Lavrov RTA_OK arithmetics was wrong. | |
17 | */ | |
18 | ||
1da177e4 LT |
19 | #include <linux/errno.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/socket.h> | |
23 | #include <linux/kernel.h> | |
1da177e4 LT |
24 | #include <linux/timer.h> |
25 | #include <linux/string.h> | |
26 | #include <linux/sockios.h> | |
27 | #include <linux/net.h> | |
28 | #include <linux/fcntl.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/capability.h> | |
33 | #include <linux/skbuff.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/security.h> | |
6756ae4b | 36 | #include <linux/mutex.h> |
1823730f | 37 | #include <linux/if_addr.h> |
ebc08a6f | 38 | #include <linux/pci.h> |
1da177e4 LT |
39 | |
40 | #include <asm/uaccess.h> | |
41 | #include <asm/system.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> | |
50 | #include <net/sock.h> | |
51 | #include <net/pkt_sched.h> | |
14c0b97d | 52 | #include <net/fib_rules.h> |
e2849863 | 53 | #include <net/rtnetlink.h> |
30ffee84 | 54 | #include <net/net_namespace.h> |
1da177e4 | 55 | |
e0d087af | 56 | struct rtnl_link { |
e2849863 TG |
57 | rtnl_doit_func doit; |
58 | rtnl_dumpit_func dumpit; | |
59 | }; | |
60 | ||
6756ae4b | 61 | static DEFINE_MUTEX(rtnl_mutex); |
1da177e4 LT |
62 | |
63 | void rtnl_lock(void) | |
64 | { | |
6756ae4b | 65 | mutex_lock(&rtnl_mutex); |
1da177e4 | 66 | } |
e0d087af | 67 | EXPORT_SYMBOL(rtnl_lock); |
1da177e4 | 68 | |
6756ae4b | 69 | void __rtnl_unlock(void) |
1da177e4 | 70 | { |
6756ae4b | 71 | mutex_unlock(&rtnl_mutex); |
1da177e4 | 72 | } |
6756ae4b | 73 | |
1da177e4 LT |
74 | void rtnl_unlock(void) |
75 | { | |
58ec3b4d | 76 | /* This fellow will unlock it for us. */ |
1da177e4 LT |
77 | netdev_run_todo(); |
78 | } | |
e0d087af | 79 | EXPORT_SYMBOL(rtnl_unlock); |
1da177e4 | 80 | |
6756ae4b SH |
81 | int rtnl_trylock(void) |
82 | { | |
83 | return mutex_trylock(&rtnl_mutex); | |
84 | } | |
e0d087af | 85 | EXPORT_SYMBOL(rtnl_trylock); |
6756ae4b | 86 | |
c9c1014b PM |
87 | int rtnl_is_locked(void) |
88 | { | |
89 | return mutex_is_locked(&rtnl_mutex); | |
90 | } | |
e0d087af | 91 | EXPORT_SYMBOL(rtnl_is_locked); |
c9c1014b | 92 | |
a898def2 PM |
93 | #ifdef CONFIG_PROVE_LOCKING |
94 | int lockdep_rtnl_is_held(void) | |
95 | { | |
96 | return lockdep_is_held(&rtnl_mutex); | |
97 | } | |
98 | EXPORT_SYMBOL(lockdep_rtnl_is_held); | |
99 | #endif /* #ifdef CONFIG_PROVE_LOCKING */ | |
100 | ||
42bad1da | 101 | static struct rtnl_link *rtnl_msg_handlers[NPROTO]; |
e2849863 TG |
102 | |
103 | static inline int rtm_msgindex(int msgtype) | |
104 | { | |
105 | int msgindex = msgtype - RTM_BASE; | |
106 | ||
107 | /* | |
108 | * msgindex < 0 implies someone tried to register a netlink | |
109 | * control code. msgindex >= RTM_NR_MSGTYPES may indicate that | |
110 | * the message type has not been added to linux/rtnetlink.h | |
111 | */ | |
112 | BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); | |
113 | ||
114 | return msgindex; | |
115 | } | |
116 | ||
117 | static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) | |
118 | { | |
119 | struct rtnl_link *tab; | |
120 | ||
0f87b1dd PM |
121 | if (protocol < NPROTO) |
122 | tab = rtnl_msg_handlers[protocol]; | |
123 | else | |
124 | tab = NULL; | |
125 | ||
51057f2f | 126 | if (tab == NULL || tab[msgindex].doit == NULL) |
e2849863 TG |
127 | tab = rtnl_msg_handlers[PF_UNSPEC]; |
128 | ||
51057f2f | 129 | return tab ? tab[msgindex].doit : NULL; |
e2849863 TG |
130 | } |
131 | ||
132 | static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) | |
133 | { | |
134 | struct rtnl_link *tab; | |
135 | ||
0f87b1dd PM |
136 | if (protocol < NPROTO) |
137 | tab = rtnl_msg_handlers[protocol]; | |
138 | else | |
139 | tab = NULL; | |
140 | ||
51057f2f | 141 | if (tab == NULL || tab[msgindex].dumpit == NULL) |
e2849863 TG |
142 | tab = rtnl_msg_handlers[PF_UNSPEC]; |
143 | ||
51057f2f | 144 | return tab ? tab[msgindex].dumpit : NULL; |
e2849863 TG |
145 | } |
146 | ||
147 | /** | |
148 | * __rtnl_register - Register a rtnetlink message type | |
149 | * @protocol: Protocol family or PF_UNSPEC | |
150 | * @msgtype: rtnetlink message type | |
151 | * @doit: Function pointer called for each request message | |
152 | * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message | |
153 | * | |
154 | * Registers the specified function pointers (at least one of them has | |
155 | * to be non-NULL) to be called whenever a request message for the | |
156 | * specified protocol family and message type is received. | |
157 | * | |
158 | * The special protocol family PF_UNSPEC may be used to define fallback | |
159 | * function pointers for the case when no entry for the specific protocol | |
160 | * family exists. | |
161 | * | |
162 | * Returns 0 on success or a negative error code. | |
163 | */ | |
164 | int __rtnl_register(int protocol, int msgtype, | |
165 | rtnl_doit_func doit, rtnl_dumpit_func dumpit) | |
166 | { | |
167 | struct rtnl_link *tab; | |
168 | int msgindex; | |
169 | ||
170 | BUG_ON(protocol < 0 || protocol >= NPROTO); | |
171 | msgindex = rtm_msgindex(msgtype); | |
172 | ||
173 | tab = rtnl_msg_handlers[protocol]; | |
174 | if (tab == NULL) { | |
175 | tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); | |
176 | if (tab == NULL) | |
177 | return -ENOBUFS; | |
178 | ||
179 | rtnl_msg_handlers[protocol] = tab; | |
180 | } | |
181 | ||
182 | if (doit) | |
183 | tab[msgindex].doit = doit; | |
184 | ||
185 | if (dumpit) | |
186 | tab[msgindex].dumpit = dumpit; | |
187 | ||
188 | return 0; | |
189 | } | |
e2849863 TG |
190 | EXPORT_SYMBOL_GPL(__rtnl_register); |
191 | ||
192 | /** | |
193 | * rtnl_register - Register a rtnetlink message type | |
194 | * | |
195 | * Identical to __rtnl_register() but panics on failure. This is useful | |
196 | * as failure of this function is very unlikely, it can only happen due | |
197 | * to lack of memory when allocating the chain to store all message | |
198 | * handlers for a protocol. Meant for use in init functions where lack | |
199 | * of memory implies no sense in continueing. | |
200 | */ | |
201 | void rtnl_register(int protocol, int msgtype, | |
202 | rtnl_doit_func doit, rtnl_dumpit_func dumpit) | |
203 | { | |
204 | if (__rtnl_register(protocol, msgtype, doit, dumpit) < 0) | |
205 | panic("Unable to register rtnetlink message handler, " | |
206 | "protocol = %d, message type = %d\n", | |
207 | protocol, msgtype); | |
208 | } | |
e2849863 TG |
209 | EXPORT_SYMBOL_GPL(rtnl_register); |
210 | ||
211 | /** | |
212 | * rtnl_unregister - Unregister a rtnetlink message type | |
213 | * @protocol: Protocol family or PF_UNSPEC | |
214 | * @msgtype: rtnetlink message type | |
215 | * | |
216 | * Returns 0 on success or a negative error code. | |
217 | */ | |
218 | int rtnl_unregister(int protocol, int msgtype) | |
219 | { | |
220 | int msgindex; | |
221 | ||
222 | BUG_ON(protocol < 0 || protocol >= NPROTO); | |
223 | msgindex = rtm_msgindex(msgtype); | |
224 | ||
225 | if (rtnl_msg_handlers[protocol] == NULL) | |
226 | return -ENOENT; | |
227 | ||
228 | rtnl_msg_handlers[protocol][msgindex].doit = NULL; | |
229 | rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; | |
230 | ||
231 | return 0; | |
232 | } | |
e2849863 TG |
233 | EXPORT_SYMBOL_GPL(rtnl_unregister); |
234 | ||
235 | /** | |
236 | * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol | |
237 | * @protocol : Protocol family or PF_UNSPEC | |
238 | * | |
239 | * Identical to calling rtnl_unregster() for all registered message types | |
240 | * of a certain protocol family. | |
241 | */ | |
242 | void rtnl_unregister_all(int protocol) | |
243 | { | |
244 | BUG_ON(protocol < 0 || protocol >= NPROTO); | |
245 | ||
246 | kfree(rtnl_msg_handlers[protocol]); | |
247 | rtnl_msg_handlers[protocol] = NULL; | |
248 | } | |
e2849863 | 249 | EXPORT_SYMBOL_GPL(rtnl_unregister_all); |
1da177e4 | 250 | |
38f7b870 PM |
251 | static LIST_HEAD(link_ops); |
252 | ||
253 | /** | |
254 | * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. | |
255 | * @ops: struct rtnl_link_ops * to register | |
256 | * | |
257 | * The caller must hold the rtnl_mutex. This function should be used | |
258 | * by drivers that create devices during module initialization. It | |
259 | * must be called before registering the devices. | |
260 | * | |
261 | * Returns 0 on success or a negative error code. | |
262 | */ | |
263 | int __rtnl_link_register(struct rtnl_link_ops *ops) | |
264 | { | |
2d85cba2 | 265 | if (!ops->dellink) |
23289a37 | 266 | ops->dellink = unregister_netdevice_queue; |
2d85cba2 | 267 | |
38f7b870 PM |
268 | list_add_tail(&ops->list, &link_ops); |
269 | return 0; | |
270 | } | |
38f7b870 PM |
271 | EXPORT_SYMBOL_GPL(__rtnl_link_register); |
272 | ||
273 | /** | |
274 | * rtnl_link_register - Register rtnl_link_ops with rtnetlink. | |
275 | * @ops: struct rtnl_link_ops * to register | |
276 | * | |
277 | * Returns 0 on success or a negative error code. | |
278 | */ | |
279 | int rtnl_link_register(struct rtnl_link_ops *ops) | |
280 | { | |
281 | int err; | |
282 | ||
283 | rtnl_lock(); | |
284 | err = __rtnl_link_register(ops); | |
285 | rtnl_unlock(); | |
286 | return err; | |
287 | } | |
38f7b870 PM |
288 | EXPORT_SYMBOL_GPL(rtnl_link_register); |
289 | ||
669f87ba PE |
290 | static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) |
291 | { | |
292 | struct net_device *dev; | |
23289a37 ED |
293 | LIST_HEAD(list_kill); |
294 | ||
669f87ba | 295 | for_each_netdev(net, dev) { |
23289a37 ED |
296 | if (dev->rtnl_link_ops == ops) |
297 | ops->dellink(dev, &list_kill); | |
669f87ba | 298 | } |
23289a37 | 299 | unregister_netdevice_many(&list_kill); |
669f87ba PE |
300 | } |
301 | ||
302 | void rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) | |
303 | { | |
304 | rtnl_lock(); | |
305 | __rtnl_kill_links(net, ops); | |
306 | rtnl_unlock(); | |
307 | } | |
308 | EXPORT_SYMBOL_GPL(rtnl_kill_links); | |
309 | ||
38f7b870 PM |
310 | /** |
311 | * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. | |
312 | * @ops: struct rtnl_link_ops * to unregister | |
313 | * | |
2d85cba2 | 314 | * The caller must hold the rtnl_mutex. |
38f7b870 PM |
315 | */ |
316 | void __rtnl_link_unregister(struct rtnl_link_ops *ops) | |
317 | { | |
881d966b | 318 | struct net *net; |
2d85cba2 | 319 | |
881d966b | 320 | for_each_net(net) { |
669f87ba | 321 | __rtnl_kill_links(net, ops); |
2d85cba2 | 322 | } |
38f7b870 PM |
323 | list_del(&ops->list); |
324 | } | |
38f7b870 PM |
325 | EXPORT_SYMBOL_GPL(__rtnl_link_unregister); |
326 | ||
327 | /** | |
328 | * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. | |
329 | * @ops: struct rtnl_link_ops * to unregister | |
330 | */ | |
331 | void rtnl_link_unregister(struct rtnl_link_ops *ops) | |
332 | { | |
333 | rtnl_lock(); | |
334 | __rtnl_link_unregister(ops); | |
335 | rtnl_unlock(); | |
336 | } | |
38f7b870 PM |
337 | EXPORT_SYMBOL_GPL(rtnl_link_unregister); |
338 | ||
339 | static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) | |
340 | { | |
341 | const struct rtnl_link_ops *ops; | |
342 | ||
343 | list_for_each_entry(ops, &link_ops, list) { | |
344 | if (!strcmp(ops->kind, kind)) | |
345 | return ops; | |
346 | } | |
347 | return NULL; | |
348 | } | |
349 | ||
350 | static size_t rtnl_link_get_size(const struct net_device *dev) | |
351 | { | |
352 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
353 | size_t size; | |
354 | ||
355 | if (!ops) | |
356 | return 0; | |
357 | ||
358 | size = nlmsg_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ | |
359 | nlmsg_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ | |
360 | ||
361 | if (ops->get_size) | |
362 | /* IFLA_INFO_DATA + nested data */ | |
363 | size += nlmsg_total_size(sizeof(struct nlattr)) + | |
364 | ops->get_size(dev); | |
365 | ||
366 | if (ops->get_xstats_size) | |
367 | size += ops->get_xstats_size(dev); /* IFLA_INFO_XSTATS */ | |
368 | ||
369 | return size; | |
370 | } | |
371 | ||
372 | static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) | |
373 | { | |
374 | const struct rtnl_link_ops *ops = dev->rtnl_link_ops; | |
375 | struct nlattr *linkinfo, *data; | |
376 | int err = -EMSGSIZE; | |
377 | ||
378 | linkinfo = nla_nest_start(skb, IFLA_LINKINFO); | |
379 | if (linkinfo == NULL) | |
380 | goto out; | |
381 | ||
382 | if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) | |
383 | goto err_cancel_link; | |
384 | if (ops->fill_xstats) { | |
385 | err = ops->fill_xstats(skb, dev); | |
386 | if (err < 0) | |
387 | goto err_cancel_link; | |
388 | } | |
389 | if (ops->fill_info) { | |
390 | data = nla_nest_start(skb, IFLA_INFO_DATA); | |
391 | if (data == NULL) | |
392 | goto err_cancel_link; | |
393 | err = ops->fill_info(skb, dev); | |
394 | if (err < 0) | |
395 | goto err_cancel_data; | |
396 | nla_nest_end(skb, data); | |
397 | } | |
398 | ||
399 | nla_nest_end(skb, linkinfo); | |
400 | return 0; | |
401 | ||
402 | err_cancel_data: | |
403 | nla_nest_cancel(skb, data); | |
404 | err_cancel_link: | |
405 | nla_nest_cancel(skb, linkinfo); | |
406 | out: | |
407 | return err; | |
408 | } | |
409 | ||
db46edc6 | 410 | static const int rtm_min[RTM_NR_FAMILIES] = |
1da177e4 | 411 | { |
f90a0a74 TG |
412 | [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), |
413 | [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), | |
414 | [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), | |
14c0b97d | 415 | [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), |
f90a0a74 TG |
416 | [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), |
417 | [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
418 | [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), | |
419 | [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), | |
f90a0a74 TG |
420 | [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), |
421 | [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), | |
1da177e4 LT |
422 | }; |
423 | ||
db46edc6 | 424 | static const int rta_max[RTM_NR_FAMILIES] = |
1da177e4 | 425 | { |
f90a0a74 TG |
426 | [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, |
427 | [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, | |
428 | [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, | |
14c0b97d | 429 | [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, |
f90a0a74 TG |
430 | [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, |
431 | [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, | |
432 | [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, | |
433 | [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, | |
1da177e4 LT |
434 | }; |
435 | ||
436 | void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data) | |
437 | { | |
438 | struct rtattr *rta; | |
439 | int size = RTA_LENGTH(attrlen); | |
440 | ||
e0d087af | 441 | rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size)); |
1da177e4 LT |
442 | rta->rta_type = attrtype; |
443 | rta->rta_len = size; | |
444 | memcpy(RTA_DATA(rta), data, attrlen); | |
b3563c4f | 445 | memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); |
1da177e4 | 446 | } |
e0d087af | 447 | EXPORT_SYMBOL(__rta_fill); |
1da177e4 | 448 | |
97c53cac | 449 | int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo) |
1da177e4 | 450 | { |
97c53cac | 451 | struct sock *rtnl = net->rtnl; |
1da177e4 LT |
452 | int err = 0; |
453 | ||
ac6d439d | 454 | NETLINK_CB(skb).dst_group = group; |
1da177e4 LT |
455 | if (echo) |
456 | atomic_inc(&skb->users); | |
457 | netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); | |
458 | if (echo) | |
459 | err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); | |
460 | return err; | |
461 | } | |
462 | ||
97c53cac | 463 | int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) |
2942e900 | 464 | { |
97c53cac DL |
465 | struct sock *rtnl = net->rtnl; |
466 | ||
2942e900 TG |
467 | return nlmsg_unicast(rtnl, skb, pid); |
468 | } | |
e0d087af | 469 | EXPORT_SYMBOL(rtnl_unicast); |
2942e900 | 470 | |
1ce85fe4 PNA |
471 | void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, |
472 | struct nlmsghdr *nlh, gfp_t flags) | |
97676b6b | 473 | { |
97c53cac | 474 | struct sock *rtnl = net->rtnl; |
97676b6b TG |
475 | int report = 0; |
476 | ||
477 | if (nlh) | |
478 | report = nlmsg_report(nlh); | |
479 | ||
1ce85fe4 | 480 | nlmsg_notify(rtnl, skb, pid, group, report, flags); |
97676b6b | 481 | } |
e0d087af | 482 | EXPORT_SYMBOL(rtnl_notify); |
97676b6b | 483 | |
97c53cac | 484 | void rtnl_set_sk_err(struct net *net, u32 group, int error) |
97676b6b | 485 | { |
97c53cac DL |
486 | struct sock *rtnl = net->rtnl; |
487 | ||
97676b6b TG |
488 | netlink_set_err(rtnl, 0, group, error); |
489 | } | |
e0d087af | 490 | EXPORT_SYMBOL(rtnl_set_sk_err); |
97676b6b | 491 | |
1da177e4 LT |
492 | int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) |
493 | { | |
2d7202bf TG |
494 | struct nlattr *mx; |
495 | int i, valid = 0; | |
496 | ||
497 | mx = nla_nest_start(skb, RTA_METRICS); | |
498 | if (mx == NULL) | |
499 | return -ENOBUFS; | |
500 | ||
501 | for (i = 0; i < RTAX_MAX; i++) { | |
502 | if (metrics[i]) { | |
503 | valid++; | |
504 | NLA_PUT_U32(skb, i+1, metrics[i]); | |
505 | } | |
1da177e4 | 506 | } |
1da177e4 | 507 | |
a57d27fc DM |
508 | if (!valid) { |
509 | nla_nest_cancel(skb, mx); | |
510 | return 0; | |
511 | } | |
2d7202bf TG |
512 | |
513 | return nla_nest_end(skb, mx); | |
514 | ||
515 | nla_put_failure: | |
bc3ed28c TG |
516 | nla_nest_cancel(skb, mx); |
517 | return -EMSGSIZE; | |
1da177e4 | 518 | } |
e0d087af | 519 | EXPORT_SYMBOL(rtnetlink_put_metrics); |
1da177e4 | 520 | |
e3703b3d TG |
521 | int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, |
522 | u32 ts, u32 tsage, long expires, u32 error) | |
523 | { | |
524 | struct rta_cacheinfo ci = { | |
525 | .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse), | |
526 | .rta_used = dst->__use, | |
527 | .rta_clntref = atomic_read(&(dst->__refcnt)), | |
528 | .rta_error = error, | |
529 | .rta_id = id, | |
530 | .rta_ts = ts, | |
531 | .rta_tsage = tsage, | |
532 | }; | |
533 | ||
534 | if (expires) | |
535 | ci.rta_expires = jiffies_to_clock_t(expires); | |
536 | ||
537 | return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); | |
538 | } | |
e3703b3d | 539 | EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); |
1da177e4 | 540 | |
93b2d4a2 | 541 | static void set_operstate(struct net_device *dev, unsigned char transition) |
b00055aa SR |
542 | { |
543 | unsigned char operstate = dev->operstate; | |
544 | ||
e0d087af | 545 | switch (transition) { |
b00055aa SR |
546 | case IF_OPER_UP: |
547 | if ((operstate == IF_OPER_DORMANT || | |
548 | operstate == IF_OPER_UNKNOWN) && | |
549 | !netif_dormant(dev)) | |
550 | operstate = IF_OPER_UP; | |
551 | break; | |
552 | ||
553 | case IF_OPER_DORMANT: | |
554 | if (operstate == IF_OPER_UP || | |
555 | operstate == IF_OPER_UNKNOWN) | |
556 | operstate = IF_OPER_DORMANT; | |
557 | break; | |
3ff50b79 | 558 | } |
b00055aa SR |
559 | |
560 | if (dev->operstate != operstate) { | |
561 | write_lock_bh(&dev_base_lock); | |
562 | dev->operstate = operstate; | |
563 | write_unlock_bh(&dev_base_lock); | |
93b2d4a2 DM |
564 | netdev_state_change(dev); |
565 | } | |
b00055aa SR |
566 | } |
567 | ||
3729d502 PM |
568 | static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, |
569 | const struct ifinfomsg *ifm) | |
570 | { | |
571 | unsigned int flags = ifm->ifi_flags; | |
572 | ||
573 | /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ | |
574 | if (ifm->ifi_change) | |
575 | flags = (flags & ifm->ifi_change) | | |
576 | (dev->flags & ~ifm->ifi_change); | |
577 | ||
578 | return flags; | |
579 | } | |
580 | ||
b60c5115 | 581 | static void copy_rtnl_link_stats(struct rtnl_link_stats *a, |
eeda3fd6 | 582 | const struct net_device_stats *b) |
1da177e4 | 583 | { |
b60c5115 TG |
584 | a->rx_packets = b->rx_packets; |
585 | a->tx_packets = b->tx_packets; | |
586 | a->rx_bytes = b->rx_bytes; | |
587 | a->tx_bytes = b->tx_bytes; | |
588 | a->rx_errors = b->rx_errors; | |
589 | a->tx_errors = b->tx_errors; | |
590 | a->rx_dropped = b->rx_dropped; | |
591 | a->tx_dropped = b->tx_dropped; | |
592 | ||
593 | a->multicast = b->multicast; | |
594 | a->collisions = b->collisions; | |
595 | ||
596 | a->rx_length_errors = b->rx_length_errors; | |
597 | a->rx_over_errors = b->rx_over_errors; | |
598 | a->rx_crc_errors = b->rx_crc_errors; | |
599 | a->rx_frame_errors = b->rx_frame_errors; | |
600 | a->rx_fifo_errors = b->rx_fifo_errors; | |
601 | a->rx_missed_errors = b->rx_missed_errors; | |
602 | ||
603 | a->tx_aborted_errors = b->tx_aborted_errors; | |
604 | a->tx_carrier_errors = b->tx_carrier_errors; | |
605 | a->tx_fifo_errors = b->tx_fifo_errors; | |
606 | a->tx_heartbeat_errors = b->tx_heartbeat_errors; | |
607 | a->tx_window_errors = b->tx_window_errors; | |
608 | ||
609 | a->rx_compressed = b->rx_compressed; | |
610 | a->tx_compressed = b->tx_compressed; | |
10708f37 JE |
611 | } |
612 | ||
14a4b42b | 613 | static void copy_rtnl_link_stats64(void *v, const struct net_device_stats *b) |
10708f37 | 614 | { |
14a4b42b | 615 | struct rtnl_link_stats64 a; |
10708f37 | 616 | |
14a4b42b JE |
617 | a.rx_packets = b->rx_packets; |
618 | a.tx_packets = b->tx_packets; | |
619 | a.rx_bytes = b->rx_bytes; | |
620 | a.tx_bytes = b->tx_bytes; | |
621 | a.rx_errors = b->rx_errors; | |
622 | a.tx_errors = b->tx_errors; | |
623 | a.rx_dropped = b->rx_dropped; | |
624 | a.tx_dropped = b->tx_dropped; | |
10708f37 | 625 | |
14a4b42b JE |
626 | a.multicast = b->multicast; |
627 | a.collisions = b->collisions; | |
10708f37 | 628 | |
14a4b42b JE |
629 | a.rx_length_errors = b->rx_length_errors; |
630 | a.rx_over_errors = b->rx_over_errors; | |
631 | a.rx_crc_errors = b->rx_crc_errors; | |
632 | a.rx_frame_errors = b->rx_frame_errors; | |
633 | a.rx_fifo_errors = b->rx_fifo_errors; | |
634 | a.rx_missed_errors = b->rx_missed_errors; | |
10708f37 | 635 | |
14a4b42b JE |
636 | a.tx_aborted_errors = b->tx_aborted_errors; |
637 | a.tx_carrier_errors = b->tx_carrier_errors; | |
638 | a.tx_fifo_errors = b->tx_fifo_errors; | |
639 | a.tx_heartbeat_errors = b->tx_heartbeat_errors; | |
640 | a.tx_window_errors = b->tx_window_errors; | |
641 | ||
642 | a.rx_compressed = b->rx_compressed; | |
643 | a.tx_compressed = b->tx_compressed; | |
644 | memcpy(v, &a, sizeof(a)); | |
10708f37 | 645 | } |
1da177e4 | 646 | |
ebc08a6f WM |
647 | static inline int rtnl_vfinfo_size(const struct net_device *dev) |
648 | { | |
649 | if (dev->dev.parent && dev_is_pci(dev->dev.parent)) | |
650 | return dev_num_vf(dev->dev.parent) * | |
651 | sizeof(struct ifla_vf_info); | |
652 | else | |
653 | return 0; | |
654 | } | |
655 | ||
38f7b870 | 656 | static inline size_t if_nlmsg_size(const struct net_device *dev) |
339bf98f TG |
657 | { |
658 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) | |
659 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ | |
0b815a1a | 660 | + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ |
339bf98f TG |
661 | + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ |
662 | + nla_total_size(sizeof(struct rtnl_link_ifmap)) | |
663 | + nla_total_size(sizeof(struct rtnl_link_stats)) | |
adcfe196 | 664 | + nla_total_size(sizeof(struct rtnl_link_stats64)) |
339bf98f TG |
665 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
666 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ | |
667 | + nla_total_size(4) /* IFLA_TXQLEN */ | |
668 | + nla_total_size(4) /* IFLA_WEIGHT */ | |
669 | + nla_total_size(4) /* IFLA_MTU */ | |
670 | + nla_total_size(4) /* IFLA_LINK */ | |
671 | + nla_total_size(4) /* IFLA_MASTER */ | |
672 | + nla_total_size(1) /* IFLA_OPERSTATE */ | |
38f7b870 | 673 | + nla_total_size(1) /* IFLA_LINKMODE */ |
ebc08a6f WM |
674 | + nla_total_size(4) /* IFLA_NUM_VF */ |
675 | + nla_total_size(rtnl_vfinfo_size(dev)) /* IFLA_VFINFO */ | |
38f7b870 | 676 | + rtnl_link_get_size(dev); /* IFLA_LINKINFO */ |
339bf98f TG |
677 | } |
678 | ||
b60c5115 | 679 | static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, |
575c3e2a PM |
680 | int type, u32 pid, u32 seq, u32 change, |
681 | unsigned int flags) | |
b60c5115 TG |
682 | { |
683 | struct ifinfomsg *ifm; | |
684 | struct nlmsghdr *nlh; | |
eeda3fd6 | 685 | const struct net_device_stats *stats; |
96e74088 | 686 | struct nlattr *attr; |
1da177e4 | 687 | |
b60c5115 TG |
688 | nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); |
689 | if (nlh == NULL) | |
26932566 | 690 | return -EMSGSIZE; |
1da177e4 | 691 | |
b60c5115 TG |
692 | ifm = nlmsg_data(nlh); |
693 | ifm->ifi_family = AF_UNSPEC; | |
694 | ifm->__ifi_pad = 0; | |
695 | ifm->ifi_type = dev->type; | |
696 | ifm->ifi_index = dev->ifindex; | |
697 | ifm->ifi_flags = dev_get_flags(dev); | |
698 | ifm->ifi_change = change; | |
699 | ||
700 | NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); | |
701 | NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len); | |
b60c5115 TG |
702 | NLA_PUT_U8(skb, IFLA_OPERSTATE, |
703 | netif_running(dev) ? dev->operstate : IF_OPER_DOWN); | |
704 | NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode); | |
705 | NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); | |
706 | ||
707 | if (dev->ifindex != dev->iflink) | |
708 | NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); | |
709 | ||
710 | if (dev->master) | |
711 | NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex); | |
1da177e4 | 712 | |
af356afa PM |
713 | if (dev->qdisc) |
714 | NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id); | |
b00055aa | 715 | |
0b815a1a SH |
716 | if (dev->ifalias) |
717 | NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias); | |
718 | ||
1da177e4 LT |
719 | if (1) { |
720 | struct rtnl_link_ifmap map = { | |
721 | .mem_start = dev->mem_start, | |
722 | .mem_end = dev->mem_end, | |
723 | .base_addr = dev->base_addr, | |
724 | .irq = dev->irq, | |
725 | .dma = dev->dma, | |
726 | .port = dev->if_port, | |
727 | }; | |
b60c5115 | 728 | NLA_PUT(skb, IFLA_MAP, sizeof(map), &map); |
1da177e4 LT |
729 | } |
730 | ||
731 | if (dev->addr_len) { | |
b60c5115 TG |
732 | NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); |
733 | NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); | |
1da177e4 LT |
734 | } |
735 | ||
96e74088 PE |
736 | attr = nla_reserve(skb, IFLA_STATS, |
737 | sizeof(struct rtnl_link_stats)); | |
738 | if (attr == NULL) | |
739 | goto nla_put_failure; | |
b60c5115 | 740 | |
eeda3fd6 | 741 | stats = dev_get_stats(dev); |
96e74088 | 742 | copy_rtnl_link_stats(nla_data(attr), stats); |
1da177e4 | 743 | |
10708f37 JE |
744 | attr = nla_reserve(skb, IFLA_STATS64, |
745 | sizeof(struct rtnl_link_stats64)); | |
746 | if (attr == NULL) | |
747 | goto nla_put_failure; | |
10708f37 JE |
748 | copy_rtnl_link_stats64(nla_data(attr), stats); |
749 | ||
ebc08a6f WM |
750 | if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) { |
751 | int i; | |
752 | struct ifla_vf_info ivi; | |
753 | ||
754 | NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)); | |
755 | for (i = 0; i < dev_num_vf(dev->dev.parent); i++) { | |
756 | if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) | |
757 | break; | |
758 | NLA_PUT(skb, IFLA_VFINFO, sizeof(ivi), &ivi); | |
759 | } | |
760 | } | |
38f7b870 PM |
761 | if (dev->rtnl_link_ops) { |
762 | if (rtnl_link_fill(skb, dev) < 0) | |
763 | goto nla_put_failure; | |
764 | } | |
765 | ||
b60c5115 TG |
766 | return nlmsg_end(skb, nlh); |
767 | ||
768 | nla_put_failure: | |
26932566 PM |
769 | nlmsg_cancel(skb, nlh); |
770 | return -EMSGSIZE; | |
1da177e4 LT |
771 | } |
772 | ||
b60c5115 | 773 | static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 774 | { |
3b1e0a65 | 775 | struct net *net = sock_net(skb->sk); |
7c28bd0b ED |
776 | int h, s_h; |
777 | int idx = 0, s_idx; | |
1da177e4 | 778 | struct net_device *dev; |
7c28bd0b ED |
779 | struct hlist_head *head; |
780 | struct hlist_node *node; | |
781 | ||
782 | s_h = cb->args[0]; | |
783 | s_idx = cb->args[1]; | |
784 | ||
785 | for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { | |
786 | idx = 0; | |
787 | head = &net->dev_index_head[h]; | |
788 | hlist_for_each_entry(dev, node, head, index_hlist) { | |
789 | if (idx < s_idx) | |
790 | goto cont; | |
791 | if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, | |
792 | NETLINK_CB(cb->skb).pid, | |
793 | cb->nlh->nlmsg_seq, 0, | |
794 | NLM_F_MULTI) <= 0) | |
795 | goto out; | |
7562f876 | 796 | cont: |
7c28bd0b ED |
797 | idx++; |
798 | } | |
1da177e4 | 799 | } |
7c28bd0b ED |
800 | out: |
801 | cb->args[1] = idx; | |
802 | cb->args[0] = h; | |
1da177e4 LT |
803 | |
804 | return skb->len; | |
805 | } | |
806 | ||
e7199288 | 807 | const struct nla_policy ifla_policy[IFLA_MAX+1] = { |
5176f91e | 808 | [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, |
38f7b870 PM |
809 | [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, |
810 | [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
5176f91e | 811 | [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, |
da5e0494 | 812 | [IFLA_MTU] = { .type = NLA_U32 }, |
76e87306 | 813 | [IFLA_LINK] = { .type = NLA_U32 }, |
da5e0494 TG |
814 | [IFLA_TXQLEN] = { .type = NLA_U32 }, |
815 | [IFLA_WEIGHT] = { .type = NLA_U32 }, | |
816 | [IFLA_OPERSTATE] = { .type = NLA_U8 }, | |
817 | [IFLA_LINKMODE] = { .type = NLA_U8 }, | |
76e87306 | 818 | [IFLA_LINKINFO] = { .type = NLA_NESTED }, |
d8a5ec67 | 819 | [IFLA_NET_NS_PID] = { .type = NLA_U32 }, |
0b815a1a | 820 | [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, |
ebc08a6f WM |
821 | [IFLA_VF_MAC] = { .type = NLA_BINARY, |
822 | .len = sizeof(struct ifla_vf_mac) }, | |
823 | [IFLA_VF_VLAN] = { .type = NLA_BINARY, | |
824 | .len = sizeof(struct ifla_vf_vlan) }, | |
825 | [IFLA_VF_TX_RATE] = { .type = NLA_BINARY, | |
826 | .len = sizeof(struct ifla_vf_tx_rate) }, | |
da5e0494 | 827 | }; |
e0d087af | 828 | EXPORT_SYMBOL(ifla_policy); |
da5e0494 | 829 | |
38f7b870 PM |
830 | static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { |
831 | [IFLA_INFO_KIND] = { .type = NLA_STRING }, | |
832 | [IFLA_INFO_DATA] = { .type = NLA_NESTED }, | |
833 | }; | |
834 | ||
81adee47 EB |
835 | struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) |
836 | { | |
837 | struct net *net; | |
838 | /* Examine the link attributes and figure out which | |
839 | * network namespace we are talking about. | |
840 | */ | |
841 | if (tb[IFLA_NET_NS_PID]) | |
842 | net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); | |
843 | else | |
844 | net = get_net(src_net); | |
845 | return net; | |
846 | } | |
847 | EXPORT_SYMBOL(rtnl_link_get_net); | |
848 | ||
1840bb13 TG |
849 | static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) |
850 | { | |
851 | if (dev) { | |
852 | if (tb[IFLA_ADDRESS] && | |
853 | nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) | |
854 | return -EINVAL; | |
855 | ||
856 | if (tb[IFLA_BROADCAST] && | |
857 | nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) | |
858 | return -EINVAL; | |
859 | } | |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
0157f60c | 864 | static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm, |
38f7b870 | 865 | struct nlattr **tb, char *ifname, int modified) |
1da177e4 | 866 | { |
d314774c | 867 | const struct net_device_ops *ops = dev->netdev_ops; |
38f7b870 | 868 | int send_addr_notify = 0; |
0157f60c | 869 | int err; |
1da177e4 | 870 | |
d8a5ec67 | 871 | if (tb[IFLA_NET_NS_PID]) { |
81adee47 | 872 | struct net *net = rtnl_link_get_net(dev_net(dev), tb); |
d8a5ec67 EB |
873 | if (IS_ERR(net)) { |
874 | err = PTR_ERR(net); | |
875 | goto errout; | |
876 | } | |
877 | err = dev_change_net_namespace(dev, net, ifname); | |
878 | put_net(net); | |
879 | if (err) | |
880 | goto errout; | |
881 | modified = 1; | |
882 | } | |
883 | ||
da5e0494 | 884 | if (tb[IFLA_MAP]) { |
1da177e4 LT |
885 | struct rtnl_link_ifmap *u_map; |
886 | struct ifmap k_map; | |
887 | ||
d314774c | 888 | if (!ops->ndo_set_config) { |
1da177e4 | 889 | err = -EOPNOTSUPP; |
0157f60c | 890 | goto errout; |
1da177e4 LT |
891 | } |
892 | ||
893 | if (!netif_device_present(dev)) { | |
894 | err = -ENODEV; | |
0157f60c | 895 | goto errout; |
1da177e4 | 896 | } |
1da177e4 | 897 | |
da5e0494 | 898 | u_map = nla_data(tb[IFLA_MAP]); |
1da177e4 LT |
899 | k_map.mem_start = (unsigned long) u_map->mem_start; |
900 | k_map.mem_end = (unsigned long) u_map->mem_end; | |
901 | k_map.base_addr = (unsigned short) u_map->base_addr; | |
902 | k_map.irq = (unsigned char) u_map->irq; | |
903 | k_map.dma = (unsigned char) u_map->dma; | |
904 | k_map.port = (unsigned char) u_map->port; | |
905 | ||
d314774c | 906 | err = ops->ndo_set_config(dev, &k_map); |
da5e0494 | 907 | if (err < 0) |
0157f60c | 908 | goto errout; |
1da177e4 | 909 | |
da5e0494 | 910 | modified = 1; |
1da177e4 LT |
911 | } |
912 | ||
da5e0494 | 913 | if (tb[IFLA_ADDRESS]) { |
70f8e78e DM |
914 | struct sockaddr *sa; |
915 | int len; | |
916 | ||
d314774c | 917 | if (!ops->ndo_set_mac_address) { |
1da177e4 | 918 | err = -EOPNOTSUPP; |
0157f60c | 919 | goto errout; |
1da177e4 | 920 | } |
da5e0494 | 921 | |
1da177e4 LT |
922 | if (!netif_device_present(dev)) { |
923 | err = -ENODEV; | |
0157f60c | 924 | goto errout; |
1da177e4 | 925 | } |
1da177e4 | 926 | |
70f8e78e DM |
927 | len = sizeof(sa_family_t) + dev->addr_len; |
928 | sa = kmalloc(len, GFP_KERNEL); | |
929 | if (!sa) { | |
930 | err = -ENOMEM; | |
0157f60c | 931 | goto errout; |
70f8e78e DM |
932 | } |
933 | sa->sa_family = dev->type; | |
da5e0494 | 934 | memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), |
70f8e78e | 935 | dev->addr_len); |
d314774c | 936 | err = ops->ndo_set_mac_address(dev, sa); |
70f8e78e | 937 | kfree(sa); |
1da177e4 | 938 | if (err) |
0157f60c | 939 | goto errout; |
1da177e4 | 940 | send_addr_notify = 1; |
da5e0494 | 941 | modified = 1; |
1da177e4 LT |
942 | } |
943 | ||
da5e0494 TG |
944 | if (tb[IFLA_MTU]) { |
945 | err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); | |
946 | if (err < 0) | |
0157f60c | 947 | goto errout; |
da5e0494 | 948 | modified = 1; |
1da177e4 LT |
949 | } |
950 | ||
da5e0494 TG |
951 | /* |
952 | * Interface selected by interface index but interface | |
953 | * name provided implies that a name change has been | |
954 | * requested. | |
955 | */ | |
51055be8 | 956 | if (ifm->ifi_index > 0 && ifname[0]) { |
da5e0494 TG |
957 | err = dev_change_name(dev, ifname); |
958 | if (err < 0) | |
0157f60c | 959 | goto errout; |
da5e0494 | 960 | modified = 1; |
1da177e4 LT |
961 | } |
962 | ||
0b815a1a SH |
963 | if (tb[IFLA_IFALIAS]) { |
964 | err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), | |
965 | nla_len(tb[IFLA_IFALIAS])); | |
966 | if (err < 0) | |
967 | goto errout; | |
968 | modified = 1; | |
969 | } | |
970 | ||
da5e0494 TG |
971 | if (tb[IFLA_BROADCAST]) { |
972 | nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); | |
973 | send_addr_notify = 1; | |
1da177e4 LT |
974 | } |
975 | ||
83b496e9 | 976 | if (ifm->ifi_flags || ifm->ifi_change) { |
3729d502 | 977 | err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); |
5f9021cf JB |
978 | if (err < 0) |
979 | goto errout; | |
83b496e9 | 980 | } |
1da177e4 | 981 | |
93b2d4a2 DM |
982 | if (tb[IFLA_TXQLEN]) |
983 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
b00055aa | 984 | |
da5e0494 | 985 | if (tb[IFLA_OPERSTATE]) |
93b2d4a2 | 986 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); |
b00055aa | 987 | |
da5e0494 | 988 | if (tb[IFLA_LINKMODE]) { |
93b2d4a2 DM |
989 | write_lock_bh(&dev_base_lock); |
990 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); | |
991 | write_unlock_bh(&dev_base_lock); | |
b00055aa SR |
992 | } |
993 | ||
ebc08a6f WM |
994 | if (tb[IFLA_VF_MAC]) { |
995 | struct ifla_vf_mac *ivm; | |
996 | ivm = nla_data(tb[IFLA_VF_MAC]); | |
4edb2466 | 997 | err = -EOPNOTSUPP; |
ebc08a6f WM |
998 | if (ops->ndo_set_vf_mac) |
999 | err = ops->ndo_set_vf_mac(dev, ivm->vf, ivm->mac); | |
ebc08a6f WM |
1000 | if (err < 0) |
1001 | goto errout; | |
1002 | modified = 1; | |
1003 | } | |
1004 | ||
1005 | if (tb[IFLA_VF_VLAN]) { | |
1006 | struct ifla_vf_vlan *ivv; | |
1007 | ivv = nla_data(tb[IFLA_VF_VLAN]); | |
4edb2466 | 1008 | err = -EOPNOTSUPP; |
ebc08a6f WM |
1009 | if (ops->ndo_set_vf_vlan) |
1010 | err = ops->ndo_set_vf_vlan(dev, ivv->vf, | |
4edb2466 WM |
1011 | ivv->vlan, |
1012 | ivv->qos); | |
ebc08a6f WM |
1013 | if (err < 0) |
1014 | goto errout; | |
1015 | modified = 1; | |
1016 | } | |
1017 | err = 0; | |
1018 | ||
1019 | if (tb[IFLA_VF_TX_RATE]) { | |
1020 | struct ifla_vf_tx_rate *ivt; | |
1021 | ivt = nla_data(tb[IFLA_VF_TX_RATE]); | |
4edb2466 | 1022 | err = -EOPNOTSUPP; |
ebc08a6f WM |
1023 | if (ops->ndo_set_vf_tx_rate) |
1024 | err = ops->ndo_set_vf_tx_rate(dev, ivt->vf, ivt->rate); | |
ebc08a6f WM |
1025 | if (err < 0) |
1026 | goto errout; | |
1027 | modified = 1; | |
1028 | } | |
1da177e4 LT |
1029 | err = 0; |
1030 | ||
0157f60c | 1031 | errout: |
da5e0494 TG |
1032 | if (err < 0 && modified && net_ratelimit()) |
1033 | printk(KERN_WARNING "A link change request failed with " | |
1034 | "some changes comitted already. Interface %s may " | |
1035 | "have been left with an inconsistent configuration, " | |
1036 | "please check.\n", dev->name); | |
1037 | ||
1da177e4 LT |
1038 | if (send_addr_notify) |
1039 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); | |
0157f60c PM |
1040 | return err; |
1041 | } | |
1da177e4 | 1042 | |
0157f60c PM |
1043 | static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1044 | { | |
3b1e0a65 | 1045 | struct net *net = sock_net(skb->sk); |
0157f60c PM |
1046 | struct ifinfomsg *ifm; |
1047 | struct net_device *dev; | |
1048 | int err; | |
1049 | struct nlattr *tb[IFLA_MAX+1]; | |
1050 | char ifname[IFNAMSIZ]; | |
1051 | ||
1052 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); | |
1053 | if (err < 0) | |
1054 | goto errout; | |
1055 | ||
1056 | if (tb[IFLA_IFNAME]) | |
1057 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1058 | else | |
1059 | ifname[0] = '\0'; | |
1060 | ||
1061 | err = -EINVAL; | |
1062 | ifm = nlmsg_data(nlh); | |
1063 | if (ifm->ifi_index > 0) | |
a3d12891 | 1064 | dev = __dev_get_by_index(net, ifm->ifi_index); |
0157f60c | 1065 | else if (tb[IFLA_IFNAME]) |
a3d12891 | 1066 | dev = __dev_get_by_name(net, ifname); |
0157f60c PM |
1067 | else |
1068 | goto errout; | |
1069 | ||
1070 | if (dev == NULL) { | |
1071 | err = -ENODEV; | |
1072 | goto errout; | |
1073 | } | |
1074 | ||
e0d087af ED |
1075 | err = validate_linkmsg(dev, tb); |
1076 | if (err < 0) | |
a3d12891 | 1077 | goto errout; |
0157f60c | 1078 | |
38f7b870 | 1079 | err = do_setlink(dev, ifm, tb, ifname, 0); |
da5e0494 | 1080 | errout: |
1da177e4 LT |
1081 | return err; |
1082 | } | |
1083 | ||
38f7b870 PM |
1084 | static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1085 | { | |
3b1e0a65 | 1086 | struct net *net = sock_net(skb->sk); |
38f7b870 PM |
1087 | const struct rtnl_link_ops *ops; |
1088 | struct net_device *dev; | |
1089 | struct ifinfomsg *ifm; | |
1090 | char ifname[IFNAMSIZ]; | |
1091 | struct nlattr *tb[IFLA_MAX+1]; | |
1092 | int err; | |
1093 | ||
1094 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); | |
1095 | if (err < 0) | |
1096 | return err; | |
1097 | ||
1098 | if (tb[IFLA_IFNAME]) | |
1099 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1100 | ||
1101 | ifm = nlmsg_data(nlh); | |
1102 | if (ifm->ifi_index > 0) | |
881d966b | 1103 | dev = __dev_get_by_index(net, ifm->ifi_index); |
38f7b870 | 1104 | else if (tb[IFLA_IFNAME]) |
881d966b | 1105 | dev = __dev_get_by_name(net, ifname); |
38f7b870 PM |
1106 | else |
1107 | return -EINVAL; | |
1108 | ||
1109 | if (!dev) | |
1110 | return -ENODEV; | |
1111 | ||
1112 | ops = dev->rtnl_link_ops; | |
1113 | if (!ops) | |
1114 | return -EOPNOTSUPP; | |
1115 | ||
23289a37 | 1116 | ops->dellink(dev, NULL); |
38f7b870 PM |
1117 | return 0; |
1118 | } | |
1119 | ||
3729d502 PM |
1120 | int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) |
1121 | { | |
1122 | unsigned int old_flags; | |
1123 | int err; | |
1124 | ||
1125 | old_flags = dev->flags; | |
1126 | if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { | |
1127 | err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); | |
1128 | if (err < 0) | |
1129 | return err; | |
1130 | } | |
1131 | ||
1132 | dev->rtnl_link_state = RTNL_LINK_INITIALIZED; | |
1133 | rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); | |
1134 | ||
1135 | __dev_notify_flags(dev, old_flags); | |
1136 | return 0; | |
1137 | } | |
1138 | EXPORT_SYMBOL(rtnl_configure_link); | |
1139 | ||
81adee47 EB |
1140 | struct net_device *rtnl_create_link(struct net *src_net, struct net *net, |
1141 | char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]) | |
e7199288 PE |
1142 | { |
1143 | int err; | |
1144 | struct net_device *dev; | |
2e59af3d ED |
1145 | unsigned int num_queues = 1; |
1146 | unsigned int real_num_queues = 1; | |
e7199288 | 1147 | |
2e59af3d | 1148 | if (ops->get_tx_queues) { |
81adee47 | 1149 | err = ops->get_tx_queues(src_net, tb, &num_queues, |
e0d087af | 1150 | &real_num_queues); |
2e59af3d ED |
1151 | if (err) |
1152 | goto err; | |
1153 | } | |
e7199288 | 1154 | err = -ENOMEM; |
2e59af3d | 1155 | dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues); |
e7199288 PE |
1156 | if (!dev) |
1157 | goto err; | |
1158 | ||
81adee47 EB |
1159 | dev_net_set(dev, net); |
1160 | dev->rtnl_link_ops = ops; | |
3729d502 | 1161 | dev->rtnl_link_state = RTNL_LINK_INITIALIZING; |
2e59af3d | 1162 | dev->real_num_tx_queues = real_num_queues; |
81adee47 | 1163 | |
e7199288 PE |
1164 | if (strchr(dev->name, '%')) { |
1165 | err = dev_alloc_name(dev, dev->name); | |
1166 | if (err < 0) | |
1167 | goto err_free; | |
1168 | } | |
1169 | ||
e7199288 PE |
1170 | if (tb[IFLA_MTU]) |
1171 | dev->mtu = nla_get_u32(tb[IFLA_MTU]); | |
1172 | if (tb[IFLA_ADDRESS]) | |
1173 | memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), | |
1174 | nla_len(tb[IFLA_ADDRESS])); | |
1175 | if (tb[IFLA_BROADCAST]) | |
1176 | memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), | |
1177 | nla_len(tb[IFLA_BROADCAST])); | |
1178 | if (tb[IFLA_TXQLEN]) | |
1179 | dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); | |
1180 | if (tb[IFLA_OPERSTATE]) | |
93b2d4a2 | 1181 | set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); |
e7199288 PE |
1182 | if (tb[IFLA_LINKMODE]) |
1183 | dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); | |
1184 | ||
1185 | return dev; | |
1186 | ||
1187 | err_free: | |
1188 | free_netdev(dev); | |
1189 | err: | |
1190 | return ERR_PTR(err); | |
1191 | } | |
e0d087af | 1192 | EXPORT_SYMBOL(rtnl_create_link); |
e7199288 | 1193 | |
38f7b870 PM |
1194 | static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) |
1195 | { | |
3b1e0a65 | 1196 | struct net *net = sock_net(skb->sk); |
38f7b870 PM |
1197 | const struct rtnl_link_ops *ops; |
1198 | struct net_device *dev; | |
1199 | struct ifinfomsg *ifm; | |
1200 | char kind[MODULE_NAME_LEN]; | |
1201 | char ifname[IFNAMSIZ]; | |
1202 | struct nlattr *tb[IFLA_MAX+1]; | |
1203 | struct nlattr *linkinfo[IFLA_INFO_MAX+1]; | |
1204 | int err; | |
1205 | ||
95a5afca | 1206 | #ifdef CONFIG_MODULES |
38f7b870 | 1207 | replay: |
8072f085 | 1208 | #endif |
38f7b870 PM |
1209 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
1210 | if (err < 0) | |
1211 | return err; | |
1212 | ||
1213 | if (tb[IFLA_IFNAME]) | |
1214 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1215 | else | |
1216 | ifname[0] = '\0'; | |
1217 | ||
1218 | ifm = nlmsg_data(nlh); | |
1219 | if (ifm->ifi_index > 0) | |
881d966b | 1220 | dev = __dev_get_by_index(net, ifm->ifi_index); |
38f7b870 | 1221 | else if (ifname[0]) |
881d966b | 1222 | dev = __dev_get_by_name(net, ifname); |
38f7b870 PM |
1223 | else |
1224 | dev = NULL; | |
1225 | ||
e0d087af ED |
1226 | err = validate_linkmsg(dev, tb); |
1227 | if (err < 0) | |
1840bb13 TG |
1228 | return err; |
1229 | ||
38f7b870 PM |
1230 | if (tb[IFLA_LINKINFO]) { |
1231 | err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, | |
1232 | tb[IFLA_LINKINFO], ifla_info_policy); | |
1233 | if (err < 0) | |
1234 | return err; | |
1235 | } else | |
1236 | memset(linkinfo, 0, sizeof(linkinfo)); | |
1237 | ||
1238 | if (linkinfo[IFLA_INFO_KIND]) { | |
1239 | nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); | |
1240 | ops = rtnl_link_ops_get(kind); | |
1241 | } else { | |
1242 | kind[0] = '\0'; | |
1243 | ops = NULL; | |
1244 | } | |
1245 | ||
1246 | if (1) { | |
1247 | struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL; | |
81adee47 | 1248 | struct net *dest_net; |
38f7b870 PM |
1249 | |
1250 | if (ops) { | |
1251 | if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { | |
1252 | err = nla_parse_nested(attr, ops->maxtype, | |
1253 | linkinfo[IFLA_INFO_DATA], | |
1254 | ops->policy); | |
1255 | if (err < 0) | |
1256 | return err; | |
1257 | data = attr; | |
1258 | } | |
1259 | if (ops->validate) { | |
1260 | err = ops->validate(tb, data); | |
1261 | if (err < 0) | |
1262 | return err; | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | if (dev) { | |
1267 | int modified = 0; | |
1268 | ||
1269 | if (nlh->nlmsg_flags & NLM_F_EXCL) | |
1270 | return -EEXIST; | |
1271 | if (nlh->nlmsg_flags & NLM_F_REPLACE) | |
1272 | return -EOPNOTSUPP; | |
1273 | ||
1274 | if (linkinfo[IFLA_INFO_DATA]) { | |
1275 | if (!ops || ops != dev->rtnl_link_ops || | |
1276 | !ops->changelink) | |
1277 | return -EOPNOTSUPP; | |
1278 | ||
1279 | err = ops->changelink(dev, tb, data); | |
1280 | if (err < 0) | |
1281 | return err; | |
1282 | modified = 1; | |
1283 | } | |
1284 | ||
1285 | return do_setlink(dev, ifm, tb, ifname, modified); | |
1286 | } | |
1287 | ||
1288 | if (!(nlh->nlmsg_flags & NLM_F_CREATE)) | |
1289 | return -ENODEV; | |
1290 | ||
3729d502 | 1291 | if (ifm->ifi_index) |
38f7b870 | 1292 | return -EOPNOTSUPP; |
0e06877c | 1293 | if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) |
38f7b870 PM |
1294 | return -EOPNOTSUPP; |
1295 | ||
1296 | if (!ops) { | |
95a5afca | 1297 | #ifdef CONFIG_MODULES |
38f7b870 PM |
1298 | if (kind[0]) { |
1299 | __rtnl_unlock(); | |
1300 | request_module("rtnl-link-%s", kind); | |
1301 | rtnl_lock(); | |
1302 | ops = rtnl_link_ops_get(kind); | |
1303 | if (ops) | |
1304 | goto replay; | |
1305 | } | |
1306 | #endif | |
1307 | return -EOPNOTSUPP; | |
1308 | } | |
1309 | ||
1310 | if (!ifname[0]) | |
1311 | snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); | |
e7199288 | 1312 | |
81adee47 EB |
1313 | dest_net = rtnl_link_get_net(net, tb); |
1314 | dev = rtnl_create_link(net, dest_net, ifname, ops, tb); | |
e7199288 PE |
1315 | |
1316 | if (IS_ERR(dev)) | |
1317 | err = PTR_ERR(dev); | |
1318 | else if (ops->newlink) | |
81adee47 | 1319 | err = ops->newlink(net, dev, tb, data); |
2d85cba2 PM |
1320 | else |
1321 | err = register_netdevice(dev); | |
3729d502 | 1322 | if (err < 0 && !IS_ERR(dev)) { |
38f7b870 | 1323 | free_netdev(dev); |
3729d502 PM |
1324 | goto out; |
1325 | } | |
81adee47 | 1326 | |
3729d502 PM |
1327 | err = rtnl_configure_link(dev, ifm); |
1328 | if (err < 0) | |
1329 | unregister_netdevice(dev); | |
1330 | out: | |
81adee47 | 1331 | put_net(dest_net); |
38f7b870 PM |
1332 | return err; |
1333 | } | |
1334 | } | |
1335 | ||
b60c5115 | 1336 | static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
711e2c33 | 1337 | { |
3b1e0a65 | 1338 | struct net *net = sock_net(skb->sk); |
b60c5115 | 1339 | struct ifinfomsg *ifm; |
a3d12891 | 1340 | char ifname[IFNAMSIZ]; |
b60c5115 TG |
1341 | struct nlattr *tb[IFLA_MAX+1]; |
1342 | struct net_device *dev = NULL; | |
1343 | struct sk_buff *nskb; | |
339bf98f | 1344 | int err; |
711e2c33 | 1345 | |
b60c5115 TG |
1346 | err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); |
1347 | if (err < 0) | |
9918f230 | 1348 | return err; |
b60c5115 | 1349 | |
a3d12891 ED |
1350 | if (tb[IFLA_IFNAME]) |
1351 | nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); | |
1352 | ||
b60c5115 | 1353 | ifm = nlmsg_data(nlh); |
a3d12891 ED |
1354 | if (ifm->ifi_index > 0) |
1355 | dev = __dev_get_by_index(net, ifm->ifi_index); | |
1356 | else if (tb[IFLA_IFNAME]) | |
1357 | dev = __dev_get_by_name(net, ifname); | |
1358 | else | |
711e2c33 | 1359 | return -EINVAL; |
711e2c33 | 1360 | |
a3d12891 ED |
1361 | if (dev == NULL) |
1362 | return -ENODEV; | |
1363 | ||
38f7b870 | 1364 | nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); |
a3d12891 ED |
1365 | if (nskb == NULL) |
1366 | return -ENOBUFS; | |
b60c5115 | 1367 | |
575c3e2a PM |
1368 | err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid, |
1369 | nlh->nlmsg_seq, 0, 0); | |
26932566 PM |
1370 | if (err < 0) { |
1371 | /* -EMSGSIZE implies BUG in if_nlmsg_size */ | |
1372 | WARN_ON(err == -EMSGSIZE); | |
1373 | kfree_skb(nskb); | |
a3d12891 ED |
1374 | } else |
1375 | err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid); | |
711e2c33 | 1376 | |
b60c5115 | 1377 | return err; |
711e2c33 | 1378 | } |
711e2c33 | 1379 | |
42bad1da | 1380 | static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
1381 | { |
1382 | int idx; | |
1383 | int s_idx = cb->family; | |
1384 | ||
1385 | if (s_idx == 0) | |
1386 | s_idx = 1; | |
e0d087af | 1387 | for (idx = 1; idx < NPROTO; idx++) { |
1da177e4 LT |
1388 | int type = cb->nlh->nlmsg_type-RTM_BASE; |
1389 | if (idx < s_idx || idx == PF_PACKET) | |
1390 | continue; | |
e2849863 TG |
1391 | if (rtnl_msg_handlers[idx] == NULL || |
1392 | rtnl_msg_handlers[idx][type].dumpit == NULL) | |
1da177e4 LT |
1393 | continue; |
1394 | if (idx > s_idx) | |
1395 | memset(&cb->args[0], 0, sizeof(cb->args)); | |
e2849863 | 1396 | if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) |
1da177e4 LT |
1397 | break; |
1398 | } | |
1399 | cb->family = idx; | |
1400 | ||
1401 | return skb->len; | |
1402 | } | |
1403 | ||
1404 | void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) | |
1405 | { | |
c346dca1 | 1406 | struct net *net = dev_net(dev); |
1da177e4 | 1407 | struct sk_buff *skb; |
0ec6d3f4 | 1408 | int err = -ENOBUFS; |
1da177e4 | 1409 | |
38f7b870 | 1410 | skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); |
0ec6d3f4 TG |
1411 | if (skb == NULL) |
1412 | goto errout; | |
1da177e4 | 1413 | |
575c3e2a | 1414 | err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0); |
26932566 PM |
1415 | if (err < 0) { |
1416 | /* -EMSGSIZE implies BUG in if_nlmsg_size() */ | |
1417 | WARN_ON(err == -EMSGSIZE); | |
1418 | kfree_skb(skb); | |
1419 | goto errout; | |
1420 | } | |
1ce85fe4 PNA |
1421 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); |
1422 | return; | |
0ec6d3f4 TG |
1423 | errout: |
1424 | if (err < 0) | |
4b3da706 | 1425 | rtnl_set_sk_err(net, RTNLGRP_LINK, err); |
1da177e4 LT |
1426 | } |
1427 | ||
1da177e4 LT |
1428 | /* Protected by RTNL sempahore. */ |
1429 | static struct rtattr **rta_buf; | |
1430 | static int rtattr_max; | |
1431 | ||
1432 | /* Process one rtnetlink message. */ | |
1433 | ||
1d00a4eb | 1434 | static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1435 | { |
3b1e0a65 | 1436 | struct net *net = sock_net(skb->sk); |
e2849863 | 1437 | rtnl_doit_func doit; |
1da177e4 LT |
1438 | int sz_idx, kind; |
1439 | int min_len; | |
1440 | int family; | |
1441 | int type; | |
1c2d670f | 1442 | int err; |
1da177e4 | 1443 | |
1da177e4 | 1444 | type = nlh->nlmsg_type; |
1da177e4 | 1445 | if (type > RTM_MAX) |
038890fe | 1446 | return -EOPNOTSUPP; |
1da177e4 LT |
1447 | |
1448 | type -= RTM_BASE; | |
1449 | ||
1450 | /* All the messages must have at least 1 byte length */ | |
1451 | if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) | |
1452 | return 0; | |
1453 | ||
e0d087af | 1454 | family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family; |
1da177e4 LT |
1455 | sz_idx = type>>2; |
1456 | kind = type&3; | |
1457 | ||
1d00a4eb TG |
1458 | if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) |
1459 | return -EPERM; | |
1da177e4 LT |
1460 | |
1461 | if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { | |
97c53cac | 1462 | struct sock *rtnl; |
e2849863 | 1463 | rtnl_dumpit_func dumpit; |
1da177e4 | 1464 | |
e2849863 TG |
1465 | dumpit = rtnl_get_dumpit(family, type); |
1466 | if (dumpit == NULL) | |
038890fe | 1467 | return -EOPNOTSUPP; |
9ac4a169 | 1468 | |
1c2d670f | 1469 | __rtnl_unlock(); |
97c53cac | 1470 | rtnl = net->rtnl; |
1c2d670f PM |
1471 | err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL); |
1472 | rtnl_lock(); | |
1473 | return err; | |
1da177e4 LT |
1474 | } |
1475 | ||
1476 | memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); | |
1477 | ||
1478 | min_len = rtm_min[sz_idx]; | |
1479 | if (nlh->nlmsg_len < min_len) | |
1d00a4eb | 1480 | return -EINVAL; |
1da177e4 LT |
1481 | |
1482 | if (nlh->nlmsg_len > min_len) { | |
1483 | int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); | |
e0d087af | 1484 | struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len); |
1da177e4 LT |
1485 | |
1486 | while (RTA_OK(attr, attrlen)) { | |
1487 | unsigned flavor = attr->rta_type; | |
1488 | if (flavor) { | |
1489 | if (flavor > rta_max[sz_idx]) | |
1d00a4eb | 1490 | return -EINVAL; |
1da177e4 LT |
1491 | rta_buf[flavor-1] = attr; |
1492 | } | |
1493 | attr = RTA_NEXT(attr, attrlen); | |
1494 | } | |
1495 | } | |
1496 | ||
e2849863 TG |
1497 | doit = rtnl_get_doit(family, type); |
1498 | if (doit == NULL) | |
038890fe | 1499 | return -EOPNOTSUPP; |
1da177e4 | 1500 | |
1d00a4eb | 1501 | return doit(skb, nlh, (void *)&rta_buf[0]); |
1da177e4 LT |
1502 | } |
1503 | ||
cd40b7d3 | 1504 | static void rtnetlink_rcv(struct sk_buff *skb) |
1da177e4 | 1505 | { |
cd40b7d3 DL |
1506 | rtnl_lock(); |
1507 | netlink_rcv_skb(skb, &rtnetlink_rcv_msg); | |
1508 | rtnl_unlock(); | |
1da177e4 LT |
1509 | } |
1510 | ||
1da177e4 LT |
1511 | static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) |
1512 | { | |
1513 | struct net_device *dev = ptr; | |
e9dc8653 | 1514 | |
1da177e4 | 1515 | switch (event) { |
1da177e4 LT |
1516 | case NETDEV_UP: |
1517 | case NETDEV_DOWN: | |
10de05af | 1518 | case NETDEV_PRE_UP: |
d90a909e EB |
1519 | case NETDEV_POST_INIT: |
1520 | case NETDEV_REGISTER: | |
1da177e4 | 1521 | case NETDEV_CHANGE: |
755d0e77 | 1522 | case NETDEV_PRE_TYPE_CHANGE: |
1da177e4 | 1523 | case NETDEV_GOING_DOWN: |
a2835763 | 1524 | case NETDEV_UNREGISTER: |
d90a909e | 1525 | case NETDEV_UNREGISTER_BATCH: |
1da177e4 LT |
1526 | break; |
1527 | default: | |
1528 | rtmsg_ifinfo(RTM_NEWLINK, dev, 0); | |
1529 | break; | |
1530 | } | |
1531 | return NOTIFY_DONE; | |
1532 | } | |
1533 | ||
1534 | static struct notifier_block rtnetlink_dev_notifier = { | |
1535 | .notifier_call = rtnetlink_event, | |
1536 | }; | |
1537 | ||
97c53cac | 1538 | |
2c8c1e72 | 1539 | static int __net_init rtnetlink_net_init(struct net *net) |
97c53cac DL |
1540 | { |
1541 | struct sock *sk; | |
1542 | sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX, | |
1543 | rtnetlink_rcv, &rtnl_mutex, THIS_MODULE); | |
1544 | if (!sk) | |
1545 | return -ENOMEM; | |
97c53cac DL |
1546 | net->rtnl = sk; |
1547 | return 0; | |
1548 | } | |
1549 | ||
2c8c1e72 | 1550 | static void __net_exit rtnetlink_net_exit(struct net *net) |
97c53cac | 1551 | { |
775516bf DL |
1552 | netlink_kernel_release(net->rtnl); |
1553 | net->rtnl = NULL; | |
97c53cac DL |
1554 | } |
1555 | ||
1556 | static struct pernet_operations rtnetlink_net_ops = { | |
1557 | .init = rtnetlink_net_init, | |
1558 | .exit = rtnetlink_net_exit, | |
1559 | }; | |
1560 | ||
1da177e4 LT |
1561 | void __init rtnetlink_init(void) |
1562 | { | |
1563 | int i; | |
1564 | ||
1565 | rtattr_max = 0; | |
1566 | for (i = 0; i < ARRAY_SIZE(rta_max); i++) | |
1567 | if (rta_max[i] > rtattr_max) | |
1568 | rtattr_max = rta_max[i]; | |
1569 | rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); | |
1570 | if (!rta_buf) | |
1571 | panic("rtnetlink_init: cannot allocate rta_buf\n"); | |
1572 | ||
97c53cac | 1573 | if (register_pernet_subsys(&rtnetlink_net_ops)) |
1da177e4 | 1574 | panic("rtnetlink_init: cannot initialize rtnetlink\n"); |
97c53cac | 1575 | |
1da177e4 LT |
1576 | netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); |
1577 | register_netdevice_notifier(&rtnetlink_dev_notifier); | |
340d17fc TG |
1578 | |
1579 | rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo); | |
1580 | rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL); | |
38f7b870 PM |
1581 | rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL); |
1582 | rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL); | |
687ad8cc TG |
1583 | |
1584 | rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all); | |
1585 | rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all); | |
1da177e4 LT |
1586 | } |
1587 |