blob: 4fe0f4b3a345843d3ab52cebe4feb80b9258e3fc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/errno.h>
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/socket.h>
23#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#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>
Stephen Hemminger6756ae42006-03-20 22:23:58 -080036#include <linux/mutex.h>
Thomas Graf18237302006-08-04 23:04:54 -070037#include <linux/if_addr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39#include <asm/uaccess.h>
40#include <asm/system.h>
41#include <asm/string.h>
42
43#include <linux/inet.h>
44#include <linux/netdevice.h>
45#include <net/ip.h>
46#include <net/protocol.h>
47#include <net/arp.h>
48#include <net/route.h>
49#include <net/udp.h>
50#include <net/sock.h>
51#include <net/pkt_sched.h>
Thomas Graf14c0b972006-08-04 03:38:38 -070052#include <net/fib_rules.h>
Thomas Grafe2849862007-03-22 11:48:11 -070053#include <net/rtnetlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Thomas Grafe2849862007-03-22 11:48:11 -070055struct rtnl_link
56{
57 rtnl_doit_func doit;
58 rtnl_dumpit_func dumpit;
59};
60
Stephen Hemminger6756ae42006-03-20 22:23:58 -080061static DEFINE_MUTEX(rtnl_mutex);
Thomas Graf56fc85a2006-08-15 00:37:29 -070062static struct sock *rtnl;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64void rtnl_lock(void)
65{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080066 mutex_lock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067}
68
Stephen Hemminger6756ae42006-03-20 22:23:58 -080069void __rtnl_unlock(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080071 mutex_unlock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072}
Stephen Hemminger6756ae42006-03-20 22:23:58 -080073
Linus Torvalds1da177e2005-04-16 15:20:36 -070074void rtnl_unlock(void)
75{
Stephen Hemminger6756ae42006-03-20 22:23:58 -080076 mutex_unlock(&rtnl_mutex);
77 if (rtnl && rtnl->sk_receive_queue.qlen)
78 rtnl->sk_data_ready(rtnl, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 netdev_run_todo();
80}
81
Stephen Hemminger6756ae42006-03-20 22:23:58 -080082int rtnl_trylock(void)
83{
84 return mutex_trylock(&rtnl_mutex);
85}
86
Linus Torvalds1da177e2005-04-16 15:20:36 -070087int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
88{
89 memset(tb, 0, sizeof(struct rtattr*)*maxattr);
90
91 while (RTA_OK(rta, len)) {
92 unsigned flavor = rta->rta_type;
93 if (flavor && flavor <= maxattr)
94 tb[flavor-1] = rta;
95 rta = RTA_NEXT(rta, len);
96 }
97 return 0;
98}
99
Thomas Grafe2849862007-03-22 11:48:11 -0700100struct rtnl_link *rtnl_msg_handlers[NPROTO];
101
102static inline int rtm_msgindex(int msgtype)
103{
104 int msgindex = msgtype - RTM_BASE;
105
106 /*
107 * msgindex < 0 implies someone tried to register a netlink
108 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that
109 * the message type has not been added to linux/rtnetlink.h
110 */
111 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES);
112
113 return msgindex;
114}
115
116static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex)
117{
118 struct rtnl_link *tab;
119
120 tab = rtnl_msg_handlers[protocol];
Thomas Graf51057f22007-03-22 21:41:06 -0700121 if (tab == NULL || tab[msgindex].doit == NULL)
Thomas Grafe2849862007-03-22 11:48:11 -0700122 tab = rtnl_msg_handlers[PF_UNSPEC];
123
Thomas Graf51057f22007-03-22 21:41:06 -0700124 return tab ? tab[msgindex].doit : NULL;
Thomas Grafe2849862007-03-22 11:48:11 -0700125}
126
127static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex)
128{
129 struct rtnl_link *tab;
130
131 tab = rtnl_msg_handlers[protocol];
Thomas Graf51057f22007-03-22 21:41:06 -0700132 if (tab == NULL || tab[msgindex].dumpit == NULL)
Thomas Grafe2849862007-03-22 11:48:11 -0700133 tab = rtnl_msg_handlers[PF_UNSPEC];
134
Thomas Graf51057f22007-03-22 21:41:06 -0700135 return tab ? tab[msgindex].dumpit : NULL;
Thomas Grafe2849862007-03-22 11:48:11 -0700136}
137
138/**
139 * __rtnl_register - Register a rtnetlink message type
140 * @protocol: Protocol family or PF_UNSPEC
141 * @msgtype: rtnetlink message type
142 * @doit: Function pointer called for each request message
143 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message
144 *
145 * Registers the specified function pointers (at least one of them has
146 * to be non-NULL) to be called whenever a request message for the
147 * specified protocol family and message type is received.
148 *
149 * The special protocol family PF_UNSPEC may be used to define fallback
150 * function pointers for the case when no entry for the specific protocol
151 * family exists.
152 *
153 * Returns 0 on success or a negative error code.
154 */
155int __rtnl_register(int protocol, int msgtype,
156 rtnl_doit_func doit, rtnl_dumpit_func dumpit)
157{
158 struct rtnl_link *tab;
159 int msgindex;
160
161 BUG_ON(protocol < 0 || protocol >= NPROTO);
162 msgindex = rtm_msgindex(msgtype);
163
164 tab = rtnl_msg_handlers[protocol];
165 if (tab == NULL) {
166 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL);
167 if (tab == NULL)
168 return -ENOBUFS;
169
170 rtnl_msg_handlers[protocol] = tab;
171 }
172
173 if (doit)
174 tab[msgindex].doit = doit;
175
176 if (dumpit)
177 tab[msgindex].dumpit = dumpit;
178
179 return 0;
180}
181
182EXPORT_SYMBOL_GPL(__rtnl_register);
183
184/**
185 * rtnl_register - Register a rtnetlink message type
186 *
187 * Identical to __rtnl_register() but panics on failure. This is useful
188 * as failure of this function is very unlikely, it can only happen due
189 * to lack of memory when allocating the chain to store all message
190 * handlers for a protocol. Meant for use in init functions where lack
191 * of memory implies no sense in continueing.
192 */
193void rtnl_register(int protocol, int msgtype,
194 rtnl_doit_func doit, rtnl_dumpit_func dumpit)
195{
196 if (__rtnl_register(protocol, msgtype, doit, dumpit) < 0)
197 panic("Unable to register rtnetlink message handler, "
198 "protocol = %d, message type = %d\n",
199 protocol, msgtype);
200}
201
202EXPORT_SYMBOL_GPL(rtnl_register);
203
204/**
205 * rtnl_unregister - Unregister a rtnetlink message type
206 * @protocol: Protocol family or PF_UNSPEC
207 * @msgtype: rtnetlink message type
208 *
209 * Returns 0 on success or a negative error code.
210 */
211int rtnl_unregister(int protocol, int msgtype)
212{
213 int msgindex;
214
215 BUG_ON(protocol < 0 || protocol >= NPROTO);
216 msgindex = rtm_msgindex(msgtype);
217
218 if (rtnl_msg_handlers[protocol] == NULL)
219 return -ENOENT;
220
221 rtnl_msg_handlers[protocol][msgindex].doit = NULL;
222 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
223
224 return 0;
225}
226
227EXPORT_SYMBOL_GPL(rtnl_unregister);
228
229/**
230 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol
231 * @protocol : Protocol family or PF_UNSPEC
232 *
233 * Identical to calling rtnl_unregster() for all registered message types
234 * of a certain protocol family.
235 */
236void rtnl_unregister_all(int protocol)
237{
238 BUG_ON(protocol < 0 || protocol >= NPROTO);
239
240 kfree(rtnl_msg_handlers[protocol]);
241 rtnl_msg_handlers[protocol] = NULL;
242}
243
244EXPORT_SYMBOL_GPL(rtnl_unregister_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Thomas Grafdb46edc2005-05-03 14:29:39 -0700246static const int rtm_min[RTM_NR_FAMILIES] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
Thomas Graff90a0a72005-05-03 14:29:00 -0700248 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
249 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
250 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
Thomas Graf14c0b972006-08-04 03:38:38 -0700251 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
Thomas Graff90a0a72005-05-03 14:29:00 -0700252 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
253 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
254 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
255 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
Thomas Graff90a0a72005-05-03 14:29:00 -0700256 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
257 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258};
259
Thomas Grafdb46edc2005-05-03 14:29:39 -0700260static const int rta_max[RTM_NR_FAMILIES] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{
Thomas Graff90a0a72005-05-03 14:29:00 -0700262 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
263 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
264 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
Thomas Graf14c0b972006-08-04 03:38:38 -0700265 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
Thomas Graff90a0a72005-05-03 14:29:00 -0700266 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
267 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
268 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
269 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270};
271
272void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
273{
274 struct rtattr *rta;
275 int size = RTA_LENGTH(attrlen);
276
277 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
278 rta->rta_type = attrtype;
279 rta->rta_len = size;
280 memcpy(RTA_DATA(rta), data, attrlen);
Patrick McHardyb3563c42005-06-28 12:54:43 -0700281 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282}
283
284size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
285{
286 size_t ret = RTA_PAYLOAD(rta);
287 char *src = RTA_DATA(rta);
288
289 if (ret > 0 && src[ret - 1] == '\0')
290 ret--;
291 if (size > 0) {
292 size_t len = (ret >= size) ? size - 1 : ret;
293 memset(dest, 0, size);
294 memcpy(dest, src, len);
295 }
296 return ret;
297}
298
299int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
300{
301 int err = 0;
302
Patrick McHardyac6d4392005-08-14 19:29:52 -0700303 NETLINK_CB(skb).dst_group = group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 if (echo)
305 atomic_inc(&skb->users);
306 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
307 if (echo)
308 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
309 return err;
310}
311
Thomas Graf2942e902006-08-15 00:30:25 -0700312int rtnl_unicast(struct sk_buff *skb, u32 pid)
313{
314 return nlmsg_unicast(rtnl, skb, pid);
315}
316
Thomas Graf97676b62006-08-15 00:31:41 -0700317int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,
318 struct nlmsghdr *nlh, gfp_t flags)
319{
320 int report = 0;
321
322 if (nlh)
323 report = nlmsg_report(nlh);
324
325 return nlmsg_notify(rtnl, skb, pid, group, report, flags);
326}
327
328void rtnl_set_sk_err(u32 group, int error)
329{
330 netlink_set_err(rtnl, 0, group, error);
331}
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
334{
Thomas Graf2d7202b2006-08-22 00:01:27 -0700335 struct nlattr *mx;
336 int i, valid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
Thomas Graf2d7202b2006-08-22 00:01:27 -0700338 mx = nla_nest_start(skb, RTA_METRICS);
339 if (mx == NULL)
340 return -ENOBUFS;
341
342 for (i = 0; i < RTAX_MAX; i++) {
343 if (metrics[i]) {
344 valid++;
345 NLA_PUT_U32(skb, i+1, metrics[i]);
346 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
David S. Millera57d27f2006-08-22 22:20:14 -0700349 if (!valid) {
350 nla_nest_cancel(skb, mx);
351 return 0;
352 }
Thomas Graf2d7202b2006-08-22 00:01:27 -0700353
354 return nla_nest_end(skb, mx);
355
356nla_put_failure:
357 return nla_nest_cancel(skb, mx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358}
359
Thomas Grafe3703b32006-11-27 09:27:07 -0800360int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id,
361 u32 ts, u32 tsage, long expires, u32 error)
362{
363 struct rta_cacheinfo ci = {
364 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse),
365 .rta_used = dst->__use,
366 .rta_clntref = atomic_read(&(dst->__refcnt)),
367 .rta_error = error,
368 .rta_id = id,
369 .rta_ts = ts,
370 .rta_tsage = tsage,
371 };
372
373 if (expires)
374 ci.rta_expires = jiffies_to_clock_t(expires);
375
376 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci);
377}
378
379EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Stefan Rompfb00055a2006-03-20 17:09:11 -0800381static void set_operstate(struct net_device *dev, unsigned char transition)
382{
383 unsigned char operstate = dev->operstate;
384
385 switch(transition) {
386 case IF_OPER_UP:
387 if ((operstate == IF_OPER_DORMANT ||
388 operstate == IF_OPER_UNKNOWN) &&
389 !netif_dormant(dev))
390 operstate = IF_OPER_UP;
391 break;
392
393 case IF_OPER_DORMANT:
394 if (operstate == IF_OPER_UP ||
395 operstate == IF_OPER_UNKNOWN)
396 operstate = IF_OPER_DORMANT;
397 break;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700398 }
Stefan Rompfb00055a2006-03-20 17:09:11 -0800399
400 if (dev->operstate != operstate) {
401 write_lock_bh(&dev_base_lock);
402 dev->operstate = operstate;
403 write_unlock_bh(&dev_base_lock);
404 netdev_state_change(dev);
405 }
406}
407
Thomas Grafb60c5112006-08-04 23:05:34 -0700408static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
409 struct net_device_stats *b)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
Thomas Grafb60c5112006-08-04 23:05:34 -0700411 a->rx_packets = b->rx_packets;
412 a->tx_packets = b->tx_packets;
413 a->rx_bytes = b->rx_bytes;
414 a->tx_bytes = b->tx_bytes;
415 a->rx_errors = b->rx_errors;
416 a->tx_errors = b->tx_errors;
417 a->rx_dropped = b->rx_dropped;
418 a->tx_dropped = b->tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Thomas Grafb60c5112006-08-04 23:05:34 -0700420 a->multicast = b->multicast;
421 a->collisions = b->collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422
Thomas Grafb60c5112006-08-04 23:05:34 -0700423 a->rx_length_errors = b->rx_length_errors;
424 a->rx_over_errors = b->rx_over_errors;
425 a->rx_crc_errors = b->rx_crc_errors;
426 a->rx_frame_errors = b->rx_frame_errors;
427 a->rx_fifo_errors = b->rx_fifo_errors;
428 a->rx_missed_errors = b->rx_missed_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
Thomas Grafb60c5112006-08-04 23:05:34 -0700430 a->tx_aborted_errors = b->tx_aborted_errors;
431 a->tx_carrier_errors = b->tx_carrier_errors;
432 a->tx_fifo_errors = b->tx_fifo_errors;
433 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
434 a->tx_window_errors = b->tx_window_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
Thomas Grafb60c5112006-08-04 23:05:34 -0700436 a->rx_compressed = b->rx_compressed;
437 a->tx_compressed = b->tx_compressed;
438};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Thomas Graf339bf982006-11-10 14:10:15 -0800440static inline size_t if_nlmsg_size(int iwbuflen)
441{
442 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
443 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
444 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */
445 + nla_total_size(sizeof(struct rtnl_link_ifmap))
446 + nla_total_size(sizeof(struct rtnl_link_stats))
447 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
448 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */
449 + nla_total_size(4) /* IFLA_TXQLEN */
450 + nla_total_size(4) /* IFLA_WEIGHT */
451 + nla_total_size(4) /* IFLA_MTU */
452 + nla_total_size(4) /* IFLA_LINK */
453 + nla_total_size(4) /* IFLA_MASTER */
454 + nla_total_size(1) /* IFLA_OPERSTATE */
455 + nla_total_size(1) /* IFLA_LINKMODE */
456 + nla_total_size(iwbuflen);
457}
458
Thomas Grafb60c5112006-08-04 23:05:34 -0700459static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
460 void *iwbuf, int iwbuflen, int type, u32 pid,
461 u32 seq, u32 change, unsigned int flags)
462{
463 struct ifinfomsg *ifm;
464 struct nlmsghdr *nlh;
465
466 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
467 if (nlh == NULL)
Patrick McHardy26932562007-01-31 23:16:40 -0800468 return -EMSGSIZE;
Thomas Grafb60c5112006-08-04 23:05:34 -0700469
470 ifm = nlmsg_data(nlh);
471 ifm->ifi_family = AF_UNSPEC;
472 ifm->__ifi_pad = 0;
473 ifm->ifi_type = dev->type;
474 ifm->ifi_index = dev->ifindex;
475 ifm->ifi_flags = dev_get_flags(dev);
476 ifm->ifi_change = change;
477
478 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
479 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
480 NLA_PUT_U32(skb, IFLA_WEIGHT, dev->weight);
481 NLA_PUT_U8(skb, IFLA_OPERSTATE,
482 netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
483 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
484 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
485
486 if (dev->ifindex != dev->iflink)
487 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
488
489 if (dev->master)
490 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
491
492 if (dev->qdisc_sleeping)
493 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id);
Stefan Rompfb00055a2006-03-20 17:09:11 -0800494
495 if (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 struct rtnl_link_ifmap map = {
497 .mem_start = dev->mem_start,
498 .mem_end = dev->mem_end,
499 .base_addr = dev->base_addr,
500 .irq = dev->irq,
501 .dma = dev->dma,
502 .port = dev->if_port,
503 };
Thomas Grafb60c5112006-08-04 23:05:34 -0700504 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 }
506
507 if (dev->addr_len) {
Thomas Grafb60c5112006-08-04 23:05:34 -0700508 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
509 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 }
511
512 if (dev->get_stats) {
Thomas Grafb60c5112006-08-04 23:05:34 -0700513 struct net_device_stats *stats = dev->get_stats(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 if (stats) {
Thomas Grafb60c5112006-08-04 23:05:34 -0700515 struct nlattr *attr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Thomas Grafb60c5112006-08-04 23:05:34 -0700517 attr = nla_reserve(skb, IFLA_STATS,
518 sizeof(struct rtnl_link_stats));
519 if (attr == NULL)
520 goto nla_put_failure;
521
522 copy_rtnl_link_stats(nla_data(attr), stats);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 }
524 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Thomas Grafb60c5112006-08-04 23:05:34 -0700526 if (iwbuf)
527 NLA_PUT(skb, IFLA_WIRELESS, iwbuflen, iwbuf);
528
529 return nlmsg_end(skb, nlh);
530
531nla_put_failure:
Patrick McHardy26932562007-01-31 23:16:40 -0800532 nlmsg_cancel(skb, nlh);
533 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534}
535
Thomas Grafb60c5112006-08-04 23:05:34 -0700536static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537{
538 int idx;
539 int s_idx = cb->args[0];
540 struct net_device *dev;
541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
543 if (idx < s_idx)
544 continue;
Thomas Grafb60c5112006-08-04 23:05:34 -0700545 if (rtnl_fill_ifinfo(skb, dev, NULL, 0, RTM_NEWLINK,
546 NETLINK_CB(cb->skb).pid,
547 cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 break;
549 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 cb->args[0] = idx;
551
552 return skb->len;
553}
554
Thomas Grafda5e0492006-08-10 21:17:37 -0700555static struct nla_policy ifla_policy[IFLA_MAX+1] __read_mostly = {
Thomas Graf5176f912006-08-26 20:13:18 -0700556 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 },
557 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) },
Thomas Grafda5e0492006-08-10 21:17:37 -0700558 [IFLA_MTU] = { .type = NLA_U32 },
559 [IFLA_TXQLEN] = { .type = NLA_U32 },
560 [IFLA_WEIGHT] = { .type = NLA_U32 },
561 [IFLA_OPERSTATE] = { .type = NLA_U8 },
562 [IFLA_LINKMODE] = { .type = NLA_U8 },
563};
564
565static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566{
Thomas Grafda5e0492006-08-10 21:17:37 -0700567 struct ifinfomsg *ifm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 struct net_device *dev;
Thomas Grafda5e0492006-08-10 21:17:37 -0700569 int err, send_addr_notify = 0, modified = 0;
570 struct nlattr *tb[IFLA_MAX+1];
571 char ifname[IFNAMSIZ];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Thomas Grafda5e0492006-08-10 21:17:37 -0700573 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
574 if (err < 0)
575 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576
Thomas Graf5176f912006-08-26 20:13:18 -0700577 if (tb[IFLA_IFNAME])
578 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ);
Patrick McHardy78e5b8912006-09-13 20:35:36 -0700579 else
580 ifname[0] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 err = -EINVAL;
Thomas Grafda5e0492006-08-10 21:17:37 -0700583 ifm = nlmsg_data(nlh);
584 if (ifm->ifi_index >= 0)
585 dev = dev_get_by_index(ifm->ifi_index);
586 else if (tb[IFLA_IFNAME])
587 dev = dev_get_by_name(ifname);
588 else
589 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Thomas Grafda5e0492006-08-10 21:17:37 -0700591 if (dev == NULL) {
592 err = -ENODEV;
593 goto errout;
594 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
Thomas Grafda5e0492006-08-10 21:17:37 -0700596 if (tb[IFLA_ADDRESS] &&
597 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
598 goto errout_dev;
599
600 if (tb[IFLA_BROADCAST] &&
601 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
602 goto errout_dev;
603
604 if (tb[IFLA_MAP]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 struct rtnl_link_ifmap *u_map;
606 struct ifmap k_map;
607
608 if (!dev->set_config) {
609 err = -EOPNOTSUPP;
Thomas Grafda5e0492006-08-10 21:17:37 -0700610 goto errout_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 }
612
613 if (!netif_device_present(dev)) {
614 err = -ENODEV;
Thomas Grafda5e0492006-08-10 21:17:37 -0700615 goto errout_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
Thomas Grafda5e0492006-08-10 21:17:37 -0700618 u_map = nla_data(tb[IFLA_MAP]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 k_map.mem_start = (unsigned long) u_map->mem_start;
620 k_map.mem_end = (unsigned long) u_map->mem_end;
621 k_map.base_addr = (unsigned short) u_map->base_addr;
622 k_map.irq = (unsigned char) u_map->irq;
623 k_map.dma = (unsigned char) u_map->dma;
624 k_map.port = (unsigned char) u_map->port;
625
626 err = dev->set_config(dev, &k_map);
Thomas Grafda5e0492006-08-10 21:17:37 -0700627 if (err < 0)
628 goto errout_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
Thomas Grafda5e0492006-08-10 21:17:37 -0700630 modified = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 }
632
Thomas Grafda5e0492006-08-10 21:17:37 -0700633 if (tb[IFLA_ADDRESS]) {
David S. Miller70f8e782006-08-08 16:47:37 -0700634 struct sockaddr *sa;
635 int len;
636
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 if (!dev->set_mac_address) {
638 err = -EOPNOTSUPP;
Thomas Grafda5e0492006-08-10 21:17:37 -0700639 goto errout_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 }
Thomas Grafda5e0492006-08-10 21:17:37 -0700641
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 if (!netif_device_present(dev)) {
643 err = -ENODEV;
Thomas Grafda5e0492006-08-10 21:17:37 -0700644 goto errout_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
David S. Miller70f8e782006-08-08 16:47:37 -0700647 len = sizeof(sa_family_t) + dev->addr_len;
648 sa = kmalloc(len, GFP_KERNEL);
649 if (!sa) {
650 err = -ENOMEM;
Thomas Grafda5e0492006-08-10 21:17:37 -0700651 goto errout_dev;
David S. Miller70f8e782006-08-08 16:47:37 -0700652 }
653 sa->sa_family = dev->type;
Thomas Grafda5e0492006-08-10 21:17:37 -0700654 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
David S. Miller70f8e782006-08-08 16:47:37 -0700655 dev->addr_len);
656 err = dev->set_mac_address(dev, sa);
657 kfree(sa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 if (err)
Thomas Grafda5e0492006-08-10 21:17:37 -0700659 goto errout_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 send_addr_notify = 1;
Thomas Grafda5e0492006-08-10 21:17:37 -0700661 modified = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 }
663
Thomas Grafda5e0492006-08-10 21:17:37 -0700664 if (tb[IFLA_MTU]) {
665 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
666 if (err < 0)
667 goto errout_dev;
668 modified = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 }
670
Thomas Grafda5e0492006-08-10 21:17:37 -0700671 /*
672 * Interface selected by interface index but interface
673 * name provided implies that a name change has been
674 * requested.
675 */
676 if (ifm->ifi_index >= 0 && ifname[0]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 err = dev_change_name(dev, ifname);
Thomas Grafda5e0492006-08-10 21:17:37 -0700678 if (err < 0)
679 goto errout_dev;
680 modified = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 }
682
Thomas Grafda5e0492006-08-10 21:17:37 -0700683 if (tb[IFLA_BROADCAST]) {
684 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
685 send_addr_notify = 1;
686 }
687
688
689 if (ifm->ifi_flags)
690 dev_change_flags(dev, ifm->ifi_flags);
691
692 if (tb[IFLA_TXQLEN])
693 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
694
695 if (tb[IFLA_WEIGHT])
696 dev->weight = nla_get_u32(tb[IFLA_WEIGHT]);
697
698 if (tb[IFLA_OPERSTATE])
699 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
700
701 if (tb[IFLA_LINKMODE]) {
702 write_lock_bh(&dev_base_lock);
703 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
704 write_unlock_bh(&dev_base_lock);
705 }
706
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 err = 0;
708
Thomas Grafda5e0492006-08-10 21:17:37 -0700709errout_dev:
710 if (err < 0 && modified && net_ratelimit())
711 printk(KERN_WARNING "A link change request failed with "
712 "some changes comitted already. Interface %s may "
713 "have been left with an inconsistent configuration, "
714 "please check.\n", dev->name);
715
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 if (send_addr_notify)
717 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
718
719 dev_put(dev);
Thomas Grafda5e0492006-08-10 21:17:37 -0700720errout:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 return err;
722}
723
Thomas Grafb60c5112006-08-04 23:05:34 -0700724static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800725{
Thomas Grafb60c5112006-08-04 23:05:34 -0700726 struct ifinfomsg *ifm;
727 struct nlattr *tb[IFLA_MAX+1];
728 struct net_device *dev = NULL;
729 struct sk_buff *nskb;
730 char *iw_buf = NULL, *iw = NULL;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800731 int iw_buf_len = 0;
Thomas Graf339bf982006-11-10 14:10:15 -0800732 int err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800733
Thomas Grafb60c5112006-08-04 23:05:34 -0700734 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
735 if (err < 0)
Eric Sesterhenn9918f232006-09-26 23:26:38 -0700736 return err;
Thomas Grafb60c5112006-08-04 23:05:34 -0700737
738 ifm = nlmsg_data(nlh);
739 if (ifm->ifi_index >= 0) {
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800740 dev = dev_get_by_index(ifm->ifi_index);
Thomas Grafb60c5112006-08-04 23:05:34 -0700741 if (dev == NULL)
742 return -ENODEV;
743 } else
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800744 return -EINVAL;
Thomas Grafb60c5112006-08-04 23:05:34 -0700745
Thomas Graf339bf982006-11-10 14:10:15 -0800746 nskb = nlmsg_new(if_nlmsg_size(iw_buf_len), GFP_KERNEL);
Thomas Grafb60c5112006-08-04 23:05:34 -0700747 if (nskb == NULL) {
748 err = -ENOBUFS;
749 goto errout;
750 }
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800751
Thomas Grafb60c5112006-08-04 23:05:34 -0700752 err = rtnl_fill_ifinfo(nskb, dev, iw, iw_buf_len, RTM_NEWLINK,
753 NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0, 0);
Patrick McHardy26932562007-01-31 23:16:40 -0800754 if (err < 0) {
755 /* -EMSGSIZE implies BUG in if_nlmsg_size */
756 WARN_ON(err == -EMSGSIZE);
757 kfree_skb(nskb);
758 goto errout;
759 }
Patrick McHardyb9741792006-10-12 01:50:30 -0700760 err = rtnl_unicast(nskb, NETLINK_CB(skb).pid);
Thomas Grafb60c5112006-08-04 23:05:34 -0700761errout:
762 kfree(iw_buf);
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800763 dev_put(dev);
Thomas Grafb60c5112006-08-04 23:05:34 -0700764
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800765 return err;
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800766}
Jean Tourrilhes711e2c32006-02-22 15:10:56 -0800767
Thomas Grafe2849862007-03-22 11:48:11 -0700768int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769{
770 int idx;
771 int s_idx = cb->family;
772
773 if (s_idx == 0)
774 s_idx = 1;
775 for (idx=1; idx<NPROTO; idx++) {
776 int type = cb->nlh->nlmsg_type-RTM_BASE;
777 if (idx < s_idx || idx == PF_PACKET)
778 continue;
Thomas Grafe2849862007-03-22 11:48:11 -0700779 if (rtnl_msg_handlers[idx] == NULL ||
780 rtnl_msg_handlers[idx][type].dumpit == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 continue;
782 if (idx > s_idx)
783 memset(&cb->args[0], 0, sizeof(cb->args));
Thomas Grafe2849862007-03-22 11:48:11 -0700784 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 break;
786 }
787 cb->family = idx;
788
789 return skb->len;
790}
791
Thomas Grafe2849862007-03-22 11:48:11 -0700792EXPORT_SYMBOL_GPL(rtnl_dump_all);
793
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
795{
796 struct sk_buff *skb;
Thomas Graf0ec6d3f2006-08-15 00:37:09 -0700797 int err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Thomas Graf339bf982006-11-10 14:10:15 -0800799 skb = nlmsg_new(if_nlmsg_size(0), GFP_KERNEL);
Thomas Graf0ec6d3f2006-08-15 00:37:09 -0700800 if (skb == NULL)
801 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
Thomas Graf0ec6d3f2006-08-15 00:37:09 -0700803 err = rtnl_fill_ifinfo(skb, dev, NULL, 0, type, 0, 0, change, 0);
Patrick McHardy26932562007-01-31 23:16:40 -0800804 if (err < 0) {
805 /* -EMSGSIZE implies BUG in if_nlmsg_size() */
806 WARN_ON(err == -EMSGSIZE);
807 kfree_skb(skb);
808 goto errout;
809 }
Thomas Graf0ec6d3f2006-08-15 00:37:09 -0700810 err = rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
811errout:
812 if (err < 0)
813 rtnl_set_sk_err(RTNLGRP_LINK, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814}
815
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816/* Protected by RTNL sempahore. */
817static struct rtattr **rta_buf;
818static int rtattr_max;
819
820/* Process one rtnetlink message. */
821
Thomas Graf1d00a4e2007-03-22 23:30:12 -0700822static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823{
Thomas Grafe2849862007-03-22 11:48:11 -0700824 rtnl_doit_func doit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 int sz_idx, kind;
826 int min_len;
827 int family;
828 int type;
Patrick McHardy1c2d6702007-04-16 16:59:10 -0700829 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 if (type > RTM_MAX)
Thomas Graf038890f2007-04-05 14:35:52 -0700833 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
835 type -= RTM_BASE;
836
837 /* All the messages must have at least 1 byte length */
838 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
839 return 0;
840
841 family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
Thomas Graf1d00a4e2007-03-22 23:30:12 -0700842 if (family >= NPROTO)
843 return -EAFNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 sz_idx = type>>2;
846 kind = type&3;
847
Thomas Graf1d00a4e2007-03-22 23:30:12 -0700848 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
849 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
851 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
Thomas Grafe2849862007-03-22 11:48:11 -0700852 rtnl_dumpit_func dumpit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
Thomas Grafe2849862007-03-22 11:48:11 -0700854 dumpit = rtnl_get_dumpit(family, type);
855 if (dumpit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -0700856 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
Patrick McHardy1c2d6702007-04-16 16:59:10 -0700858 __rtnl_unlock();
859 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL);
860 rtnl_lock();
861 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 }
863
864 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
865
866 min_len = rtm_min[sz_idx];
867 if (nlh->nlmsg_len < min_len)
Thomas Graf1d00a4e2007-03-22 23:30:12 -0700868 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
870 if (nlh->nlmsg_len > min_len) {
871 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
872 struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len);
873
874 while (RTA_OK(attr, attrlen)) {
875 unsigned flavor = attr->rta_type;
876 if (flavor) {
877 if (flavor > rta_max[sz_idx])
Thomas Graf1d00a4e2007-03-22 23:30:12 -0700878 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 rta_buf[flavor-1] = attr;
880 }
881 attr = RTA_NEXT(attr, attrlen);
882 }
883 }
884
Thomas Grafe2849862007-03-22 11:48:11 -0700885 doit = rtnl_get_doit(family, type);
886 if (doit == NULL)
Thomas Graf038890f2007-04-05 14:35:52 -0700887 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888
Thomas Graf1d00a4e2007-03-22 23:30:12 -0700889 return doit(skb, nlh, (void *)&rta_buf[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890}
891
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892static void rtnetlink_rcv(struct sock *sk, int len)
893{
Thomas Graf9ac4a162005-11-10 02:25:55 +0100894 unsigned int qlen = 0;
Herbert Xu2a0a6eb2005-05-03 14:55:09 -0700895
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 do {
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800897 mutex_lock(&rtnl_mutex);
Thomas Graf9ac4a162005-11-10 02:25:55 +0100898 netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg);
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800899 mutex_unlock(&rtnl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900
901 netdev_run_todo();
Herbert Xu2a0a6eb2005-05-03 14:55:09 -0700902 } while (qlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903}
904
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
906{
907 struct net_device *dev = ptr;
908 switch (event) {
909 case NETDEV_UNREGISTER:
910 rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
911 break;
912 case NETDEV_REGISTER:
913 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
914 break;
915 case NETDEV_UP:
916 case NETDEV_DOWN:
917 rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING);
918 break;
919 case NETDEV_CHANGE:
920 case NETDEV_GOING_DOWN:
921 break;
922 default:
923 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
924 break;
925 }
926 return NOTIFY_DONE;
927}
928
929static struct notifier_block rtnetlink_dev_notifier = {
930 .notifier_call = rtnetlink_event,
931};
932
933void __init rtnetlink_init(void)
934{
935 int i;
936
937 rtattr_max = 0;
938 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
939 if (rta_max[i] > rtattr_max)
940 rtattr_max = rta_max[i];
941 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
942 if (!rta_buf)
943 panic("rtnetlink_init: cannot allocate rta_buf\n");
944
Patrick McHardy06628602005-08-15 12:33:26 -0700945 rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
Patrick McHardy1c2d6702007-04-16 16:59:10 -0700946 &rtnl_mutex, THIS_MODULE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 if (rtnl == NULL)
948 panic("rtnetlink_init: cannot initialize rtnetlink\n");
949 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
950 register_netdevice_notifier(&rtnetlink_dev_notifier);
Thomas Graf340d17f2007-03-22 11:49:22 -0700951
952 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo);
953 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL);
Thomas Graf687ad8c2007-03-22 11:59:42 -0700954
955 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all);
956 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957}
958
959EXPORT_SYMBOL(__rta_fill);
960EXPORT_SYMBOL(rtattr_strlcpy);
961EXPORT_SYMBOL(rtattr_parse);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962EXPORT_SYMBOL(rtnetlink_put_metrics);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963EXPORT_SYMBOL(rtnl_lock);
Stephen Hemminger6756ae42006-03-20 22:23:58 -0800964EXPORT_SYMBOL(rtnl_trylock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965EXPORT_SYMBOL(rtnl_unlock);
Thomas Graf2942e902006-08-15 00:30:25 -0700966EXPORT_SYMBOL(rtnl_unicast);
Thomas Graf97676b62006-08-15 00:31:41 -0700967EXPORT_SYMBOL(rtnl_notify);
968EXPORT_SYMBOL(rtnl_set_sk_err);