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[PATCH] RPC: kick off socket connect operations faster
[linux-2.6/verdex.git] / net / core / rtnetlink.c
blobe013d836a7abc3592d5fa5db0f24aca874095f52
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
19 #include <linux/config.h>
20 #include <linux/errno.h>
21 #include <linux/module.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/kernel.h>
25 #include <linux/sched.h>
26 #include <linux/timer.h>
27 #include <linux/string.h>
28 #include <linux/sockios.h>
29 #include <linux/net.h>
30 #include <linux/fcntl.h>
31 #include <linux/mm.h>
32 #include <linux/slab.h>
33 #include <linux/interrupt.h>
34 #include <linux/capability.h>
35 #include <linux/skbuff.h>
36 #include <linux/init.h>
37 #include <linux/security.h>
38
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>
52
53 DECLARE_MUTEX(rtnl_sem);
54
55 void rtnl_lock(void)
56 {
57 rtnl_shlock();
58 }
59
60 int rtnl_lock_interruptible(void)
61 {
62 return down_interruptible(&rtnl_sem);
63 }
64
65 void rtnl_unlock(void)
66 {
67 rtnl_shunlock();
68
69 netdev_run_todo();
70 }
71
72 int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
73 {
74 memset(tb, 0, sizeof(struct rtattr*)*maxattr);
75
76 while (RTA_OK(rta, len)) {
77 unsigned flavor = rta->rta_type;
78 if (flavor && flavor <= maxattr)
79 tb[flavor-1] = rta;
80 rta = RTA_NEXT(rta, len);
81 }
82 return 0;
83 }
84
85 struct sock *rtnl;
86
87 struct rtnetlink_link * rtnetlink_links[NPROTO];
88
89 static const int rtm_min[RTM_NR_FAMILIES] =
90 {
91 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
92 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
93 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
94 [RTM_FAM(RTM_NEWNEIGH)] = NLMSG_LENGTH(sizeof(struct ndmsg)),
95 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
96 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
97 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
98 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
99 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
100 [RTM_FAM(RTM_NEWPREFIX)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
101 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
102 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
103 [RTM_FAM(RTM_NEWNEIGHTBL)] = NLMSG_LENGTH(sizeof(struct ndtmsg)),
104 };
105
106 static const int rta_max[RTM_NR_FAMILIES] =
107 {
108 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
109 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
110 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
111 [RTM_FAM(RTM_NEWNEIGH)] = NDA_MAX,
112 [RTM_FAM(RTM_NEWRULE)] = RTA_MAX,
113 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
114 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
115 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
116 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
117 [RTM_FAM(RTM_NEWNEIGHTBL)] = NDTA_MAX,
118 };
119
120 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
121 {
122 struct rtattr *rta;
123 int size = RTA_LENGTH(attrlen);
124
125 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
126 rta->rta_type = attrtype;
127 rta->rta_len = size;
128 memcpy(RTA_DATA(rta), data, attrlen);
129 }
130
131 size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
132 {
133 size_t ret = RTA_PAYLOAD(rta);
134 char *src = RTA_DATA(rta);
135
136 if (ret > 0 && src[ret - 1] == '\0')
137 ret--;
138 if (size > 0) {
139 size_t len = (ret >= size) ? size - 1 : ret;
140 memset(dest, 0, size);
141 memcpy(dest, src, len);
142 }
143 return ret;
144 }
145
146 int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
147 {
148 int err = 0;
149
150 NETLINK_CB(skb).dst_groups = group;
151 if (echo)
152 atomic_inc(&skb->users);
153 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
154 if (echo)
155 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
156 return err;
157 }
158
159 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
160 {
161 struct rtattr *mx = (struct rtattr*)skb->tail;
162 int i;
163
164 RTA_PUT(skb, RTA_METRICS, 0, NULL);
165 for (i=0; i<RTAX_MAX; i++) {
166 if (metrics[i])
167 RTA_PUT(skb, i+1, sizeof(u32), metrics+i);
168 }
169 mx->rta_len = skb->tail - (u8*)mx;
170 if (mx->rta_len == RTA_LENGTH(0))
171 skb_trim(skb, (u8*)mx - skb->data);
172 return 0;
173
174 rtattr_failure:
175 skb_trim(skb, (u8*)mx - skb->data);
176 return -1;
177 }
178
179
180 static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
181 int type, u32 pid, u32 seq, u32 change,
182 unsigned int flags)
183 {
184 struct ifinfomsg *r;
185 struct nlmsghdr *nlh;
186 unsigned char *b = skb->tail;
187
188 nlh = NLMSG_NEW(skb, pid, seq, type, sizeof(*r), flags);
189 r = NLMSG_DATA(nlh);
190 r->ifi_family = AF_UNSPEC;
191 r->ifi_type = dev->type;
192 r->ifi_index = dev->ifindex;
193 r->ifi_flags = dev_get_flags(dev);
194 r->ifi_change = change;
195
196 RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
197
198 if (1) {
199 u32 txqlen = dev->tx_queue_len;
200 RTA_PUT(skb, IFLA_TXQLEN, sizeof(txqlen), &txqlen);
201 }
202
203 if (1) {
204 u32 weight = dev->weight;
205 RTA_PUT(skb, IFLA_WEIGHT, sizeof(weight), &weight);
206 }
207
208 if (1) {
209 struct rtnl_link_ifmap map = {
210 .mem_start = dev->mem_start,
211 .mem_end = dev->mem_end,
212 .base_addr = dev->base_addr,
213 .irq = dev->irq,
214 .dma = dev->dma,
215 .port = dev->if_port,
216 };
217 RTA_PUT(skb, IFLA_MAP, sizeof(map), &map);
218 }
219
220 if (dev->addr_len) {
221 RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
222 RTA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
223 }
224
225 if (1) {
226 u32 mtu = dev->mtu;
227 RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
228 }
229
230 if (dev->ifindex != dev->iflink) {
231 u32 iflink = dev->iflink;
232 RTA_PUT(skb, IFLA_LINK, sizeof(iflink), &iflink);
233 }
234
235 if (dev->qdisc_sleeping)
236 RTA_PUT(skb, IFLA_QDISC,
237 strlen(dev->qdisc_sleeping->ops->id) + 1,
238 dev->qdisc_sleeping->ops->id);
239
240 if (dev->master) {
241 u32 master = dev->master->ifindex;
242 RTA_PUT(skb, IFLA_MASTER, sizeof(master), &master);
243 }
244
245 if (dev->get_stats) {
246 unsigned long *stats = (unsigned long*)dev->get_stats(dev);
247 if (stats) {
248 struct rtattr *a;
249 __u32 *s;
250 int i;
251 int n = sizeof(struct rtnl_link_stats)/4;
252
253 a = __RTA_PUT(skb, IFLA_STATS, n*4);
254 s = RTA_DATA(a);
255 for (i=0; i<n; i++)
256 s[i] = stats[i];
257 }
258 }
259 nlh->nlmsg_len = skb->tail - b;
260 return skb->len;
261
262 nlmsg_failure:
263 rtattr_failure:
264 skb_trim(skb, b - skb->data);
265 return -1;
266 }
267
268 static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
269 {
270 int idx;
271 int s_idx = cb->args[0];
272 struct net_device *dev;
273
274 read_lock(&dev_base_lock);
275 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
276 if (idx < s_idx)
277 continue;
278 if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK,
279 NETLINK_CB(cb->skb).pid,
280 cb->nlh->nlmsg_seq, 0,
281 NLM_F_MULTI) <= 0)
282 break;
283 }
284 read_unlock(&dev_base_lock);
285 cb->args[0] = idx;
286
287 return skb->len;
288 }
289
290 static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
291 {
292 struct ifinfomsg *ifm = NLMSG_DATA(nlh);
293 struct rtattr **ida = arg;
294 struct net_device *dev;
295 int err, send_addr_notify = 0;
296
297 if (ifm->ifi_index >= 0)
298 dev = dev_get_by_index(ifm->ifi_index);
299 else if (ida[IFLA_IFNAME - 1]) {
300 char ifname[IFNAMSIZ];
301
302 if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
303 IFNAMSIZ) >= IFNAMSIZ)
304 return -EINVAL;
305 dev = dev_get_by_name(ifname);
306 } else
307 return -EINVAL;
308
309 if (!dev)
310 return -ENODEV;
311
312 err = -EINVAL;
313
314 if (ifm->ifi_flags)
315 dev_change_flags(dev, ifm->ifi_flags);
316
317 if (ida[IFLA_MAP - 1]) {
318 struct rtnl_link_ifmap *u_map;
319 struct ifmap k_map;
320
321 if (!dev->set_config) {
322 err = -EOPNOTSUPP;
323 goto out;
324 }
325
326 if (!netif_device_present(dev)) {
327 err = -ENODEV;
328 goto out;
329 }
330
331 if (ida[IFLA_MAP - 1]->rta_len != RTA_LENGTH(sizeof(*u_map)))
332 goto out;
333
334 u_map = RTA_DATA(ida[IFLA_MAP - 1]);
335
336 k_map.mem_start = (unsigned long) u_map->mem_start;
337 k_map.mem_end = (unsigned long) u_map->mem_end;
338 k_map.base_addr = (unsigned short) u_map->base_addr;
339 k_map.irq = (unsigned char) u_map->irq;
340 k_map.dma = (unsigned char) u_map->dma;
341 k_map.port = (unsigned char) u_map->port;
342
343 err = dev->set_config(dev, &k_map);
344
345 if (err)
346 goto out;
347 }
348
349 if (ida[IFLA_ADDRESS - 1]) {
350 if (!dev->set_mac_address) {
351 err = -EOPNOTSUPP;
352 goto out;
353 }
354 if (!netif_device_present(dev)) {
355 err = -ENODEV;
356 goto out;
357 }
358 if (ida[IFLA_ADDRESS - 1]->rta_len != RTA_LENGTH(dev->addr_len))
359 goto out;
360
361 err = dev->set_mac_address(dev, RTA_DATA(ida[IFLA_ADDRESS - 1]));
362 if (err)
363 goto out;
364 send_addr_notify = 1;
365 }
366
367 if (ida[IFLA_BROADCAST - 1]) {
368 if (ida[IFLA_BROADCAST - 1]->rta_len != RTA_LENGTH(dev->addr_len))
369 goto out;
370 memcpy(dev->broadcast, RTA_DATA(ida[IFLA_BROADCAST - 1]),
371 dev->addr_len);
372 send_addr_notify = 1;
373 }
374
375 if (ida[IFLA_MTU - 1]) {
376 if (ida[IFLA_MTU - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
377 goto out;
378 err = dev_set_mtu(dev, *((u32 *) RTA_DATA(ida[IFLA_MTU - 1])));
379
380 if (err)
381 goto out;
382
383 }
384
385 if (ida[IFLA_TXQLEN - 1]) {
386 if (ida[IFLA_TXQLEN - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
387 goto out;
388
389 dev->tx_queue_len = *((u32 *) RTA_DATA(ida[IFLA_TXQLEN - 1]));
390 }
391
392 if (ida[IFLA_WEIGHT - 1]) {
393 if (ida[IFLA_WEIGHT - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
394 goto out;
395
396 dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1]));
397 }
398
399 if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) {
400 char ifname[IFNAMSIZ];
401
402 if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
403 IFNAMSIZ) >= IFNAMSIZ)
404 goto out;
405 err = dev_change_name(dev, ifname);
406 if (err)
407 goto out;
408 }
409
410 err = 0;
411
412 out:
413 if (send_addr_notify)
414 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
415
416 dev_put(dev);
417 return err;
418 }
419
420 static int rtnetlink_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
421 {
422 int idx;
423 int s_idx = cb->family;
424
425 if (s_idx == 0)
426 s_idx = 1;
427 for (idx=1; idx<NPROTO; idx++) {
428 int type = cb->nlh->nlmsg_type-RTM_BASE;
429 if (idx < s_idx || idx == PF_PACKET)
430 continue;
431 if (rtnetlink_links[idx] == NULL ||
432 rtnetlink_links[idx][type].dumpit == NULL)
433 continue;
434 if (idx > s_idx)
435 memset(&cb->args[0], 0, sizeof(cb->args));
436 if (rtnetlink_links[idx][type].dumpit(skb, cb))
437 break;
438 }
439 cb->family = idx;
440
441 return skb->len;
442 }
443
444 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
445 {
446 struct sk_buff *skb;
447 int size = NLMSG_SPACE(sizeof(struct ifinfomsg) +
448 sizeof(struct rtnl_link_ifmap) +
449 sizeof(struct rtnl_link_stats) + 128);
450
451 skb = alloc_skb(size, GFP_KERNEL);
452 if (!skb)
453 return;
454
455 if (rtnetlink_fill_ifinfo(skb, dev, type, current->pid, 0, change, 0) < 0) {
456 kfree_skb(skb);
457 return;
458 }
459 NETLINK_CB(skb).dst_groups = RTMGRP_LINK;
460 netlink_broadcast(rtnl, skb, 0, RTMGRP_LINK, GFP_KERNEL);
461 }
462
463 static int rtnetlink_done(struct netlink_callback *cb)
464 {
465 return 0;
466 }
467
468 /* Protected by RTNL sempahore. */
469 static struct rtattr **rta_buf;
470 static int rtattr_max;
471
472 /* Process one rtnetlink message. */
473
474 static __inline__ int
475 rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
476 {
477 struct rtnetlink_link *link;
478 struct rtnetlink_link *link_tab;
479 int sz_idx, kind;
480 int min_len;
481 int family;
482 int type;
483 int err;
484
485 /* Only requests are handled by kernel now */
486 if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
487 return 0;
488
489 type = nlh->nlmsg_type;
490
491 /* A control message: ignore them */
492 if (type < RTM_BASE)
493 return 0;
494
495 /* Unknown message: reply with EINVAL */
496 if (type > RTM_MAX)
497 goto err_inval;
498
499 type -= RTM_BASE;
500
501 /* All the messages must have at least 1 byte length */
502 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
503 return 0;
504
505 family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
506 if (family >= NPROTO) {
507 *errp = -EAFNOSUPPORT;
508 return -1;
509 }
510
511 link_tab = rtnetlink_links[family];
512 if (link_tab == NULL)
513 link_tab = rtnetlink_links[PF_UNSPEC];
514 link = &link_tab[type];
515
516 sz_idx = type>>2;
517 kind = type&3;
518
519 if (kind != 2 && security_netlink_recv(skb)) {
520 *errp = -EPERM;
521 return -1;
522 }
523
524 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
525 u32 rlen;
526
527 if (link->dumpit == NULL)
528 link = &(rtnetlink_links[PF_UNSPEC][type]);
529
530 if (link->dumpit == NULL)
531 goto err_inval;
532
533 if ((*errp = netlink_dump_start(rtnl, skb, nlh,
534 link->dumpit,
535 rtnetlink_done)) != 0) {
536 return -1;
537 }
538 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
539 if (rlen > skb->len)
540 rlen = skb->len;
541 skb_pull(skb, rlen);
542 return -1;
543 }
544
545 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
546
547 min_len = rtm_min[sz_idx];
548 if (nlh->nlmsg_len < min_len)
549 goto err_inval;
550
551 if (nlh->nlmsg_len > min_len) {
552 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
553 struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len);
554
555 while (RTA_OK(attr, attrlen)) {
556 unsigned flavor = attr->rta_type;
557 if (flavor) {
558 if (flavor > rta_max[sz_idx])
559 goto err_inval;
560 rta_buf[flavor-1] = attr;
561 }
562 attr = RTA_NEXT(attr, attrlen);
563 }
564 }
565
566 if (link->doit == NULL)
567 link = &(rtnetlink_links[PF_UNSPEC][type]);
568 if (link->doit == NULL)
569 goto err_inval;
570 err = link->doit(skb, nlh, (void *)&rta_buf[0]);
571
572 *errp = err;
573 return err;
574
575 err_inval:
576 *errp = -EINVAL;
577 return -1;
578 }
579
580 /*
581 * Process one packet of messages.
582 * Malformed skbs with wrong lengths of messages are discarded silently.
583 */
584
585 static inline int rtnetlink_rcv_skb(struct sk_buff *skb)
586 {
587 int err;
588 struct nlmsghdr * nlh;
589
590 while (skb->len >= NLMSG_SPACE(0)) {
591 u32 rlen;
592
593 nlh = (struct nlmsghdr *)skb->data;
594 if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
595 return 0;
596 rlen = NLMSG_ALIGN(nlh->nlmsg_len);
597 if (rlen > skb->len)
598 rlen = skb->len;
599 if (rtnetlink_rcv_msg(skb, nlh, &err)) {
600 /* Not error, but we must interrupt processing here:
601 * Note, that in this case we do not pull message
602 * from skb, it will be processed later.
603 */
604 if (err == 0)
605 return -1;
606 netlink_ack(skb, nlh, err);
607 } else if (nlh->nlmsg_flags&NLM_F_ACK)
608 netlink_ack(skb, nlh, 0);
609 skb_pull(skb, rlen);
610 }
611
612 return 0;
613 }
614
615 /*
616 * rtnetlink input queue processing routine:
617 * - process as much as there was in the queue upon entry.
618 * - feed skbs to rtnetlink_rcv_skb, until it refuse a message,
619 * that will occur, when a dump started.
620 */
621
622 static void rtnetlink_rcv(struct sock *sk, int len)
623 {
624 unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
625
626 do {
627 struct sk_buff *skb;
628
629 rtnl_lock();
630
631 if (qlen > skb_queue_len(&sk->sk_receive_queue))
632 qlen = skb_queue_len(&sk->sk_receive_queue);
633
634 for (; qlen; qlen--) {
635 skb = skb_dequeue(&sk->sk_receive_queue);
636 if (rtnetlink_rcv_skb(skb)) {
637 if (skb->len)
638 skb_queue_head(&sk->sk_receive_queue,
639 skb);
640 else {
641 kfree_skb(skb);
642 qlen--;
643 }
644 break;
645 }
646 kfree_skb(skb);
647 }
648
649 up(&rtnl_sem);
650
651 netdev_run_todo();
652 } while (qlen);
653 }
654
655 static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] =
656 {
657 [RTM_GETLINK - RTM_BASE] = { .dumpit = rtnetlink_dump_ifinfo },
658 [RTM_SETLINK - RTM_BASE] = { .doit = do_setlink },
659 [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
660 [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
661 [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add },
662 [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete },
663 [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info },
664 [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
665 [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info },
666 [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set },
667 };
668
669 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
670 {
671 struct net_device *dev = ptr;
672 switch (event) {
673 case NETDEV_UNREGISTER:
674 rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
675 break;
676 case NETDEV_REGISTER:
677 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
678 break;
679 case NETDEV_UP:
680 case NETDEV_DOWN:
681 rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING);
682 break;
683 case NETDEV_CHANGE:
684 case NETDEV_GOING_DOWN:
685 break;
686 default:
687 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
688 break;
689 }
690 return NOTIFY_DONE;
691 }
692
693 static struct notifier_block rtnetlink_dev_notifier = {
694 .notifier_call = rtnetlink_event,
695 };
696
697 void __init rtnetlink_init(void)
698 {
699 int i;
700
701 rtattr_max = 0;
702 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
703 if (rta_max[i] > rtattr_max)
704 rtattr_max = rta_max[i];
705 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
706 if (!rta_buf)
707 panic("rtnetlink_init: cannot allocate rta_buf\n");
708
709 rtnl = netlink_kernel_create(NETLINK_ROUTE, rtnetlink_rcv);
710 if (rtnl == NULL)
711 panic("rtnetlink_init: cannot initialize rtnetlink\n");
712 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
713 register_netdevice_notifier(&rtnetlink_dev_notifier);
714 rtnetlink_links[PF_UNSPEC] = link_rtnetlink_table;
715 rtnetlink_links[PF_PACKET] = link_rtnetlink_table;
716 }
717
718 EXPORT_SYMBOL(__rta_fill);
719 EXPORT_SYMBOL(rtattr_strlcpy);
720 EXPORT_SYMBOL(rtattr_parse);
721 EXPORT_SYMBOL(rtnetlink_links);
722 EXPORT_SYMBOL(rtnetlink_put_metrics);
723 EXPORT_SYMBOL(rtnl);
724 EXPORT_SYMBOL(rtnl_lock);
725 EXPORT_SYMBOL(rtnl_lock_interruptible);
726 EXPORT_SYMBOL(rtnl_sem);
727 EXPORT_SYMBOL(rtnl_unlock);
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