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.
6 * Routing netlink socket interface: protocol independent part.
8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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.
16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
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>
24 #include <linux/sched.h>
25 #include <linux/timer.h>
26 #include <linux/string.h>
27 #include <linux/sockios.h>
28 #include <linux/net.h>
29 #include <linux/fcntl.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/capability.h>
34 #include <linux/skbuff.h>
35 #include <linux/init.h>
36 #include <linux/security.h>
37 #include <linux/mutex.h>
39 #include <asm/uaccess.h>
40 #include <asm/system.h>
41 #include <asm/string.h>
43 #include <linux/inet.h>
44 #include <linux/netdevice.h>
46 #include <net/protocol.h>
48 #include <net/route.h>
51 #include <net/pkt_sched.h>
52 #include <net/netlink.h>
53 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
54 #include <linux/wireless.h>
55 #include <net/iw_handler.h>
56 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
58 static DEFINE_MUTEX(rtnl_mutex);
62 mutex_lock(&rtnl_mutex);
65 void __rtnl_unlock(void)
67 mutex_unlock(&rtnl_mutex);
70 void rtnl_unlock(void)
72 mutex_unlock(&rtnl_mutex);
73 if (rtnl && rtnl->sk_receive_queue.qlen)
74 rtnl->sk_data_ready(rtnl, 0);
78 int rtnl_trylock(void)
80 return mutex_trylock(&rtnl_mutex);
83 int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
85 memset(tb, 0, sizeof(struct rtattr*)*maxattr);
87 while (RTA_OK(rta, len)) {
88 unsigned flavor = rta->rta_type;
89 if (flavor && flavor <= maxattr)
91 rta = RTA_NEXT(rta, len);
98 struct rtnetlink_link * rtnetlink_links[NPROTO];
100 static const int rtm_min[RTM_NR_FAMILIES] =
102 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
103 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
104 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
105 [RTM_FAM(RTM_NEWNEIGH)] = NLMSG_LENGTH(sizeof(struct ndmsg)),
106 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
107 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
108 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
109 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
110 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
111 [RTM_FAM(RTM_NEWPREFIX)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
112 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
113 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
114 [RTM_FAM(RTM_NEWNEIGHTBL)] = NLMSG_LENGTH(sizeof(struct ndtmsg)),
117 static const int rta_max[RTM_NR_FAMILIES] =
119 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
120 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
121 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
122 [RTM_FAM(RTM_NEWNEIGH)] = NDA_MAX,
123 [RTM_FAM(RTM_NEWRULE)] = RTA_MAX,
124 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
125 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
126 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
127 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
128 [RTM_FAM(RTM_NEWNEIGHTBL)] = NDTA_MAX,
131 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
134 int size = RTA_LENGTH(attrlen);
136 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
137 rta->rta_type = attrtype;
139 memcpy(RTA_DATA(rta), data, attrlen);
140 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
143 size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
145 size_t ret = RTA_PAYLOAD(rta);
146 char *src = RTA_DATA(rta);
148 if (ret > 0 && src[ret - 1] == '\0')
151 size_t len = (ret >= size) ? size - 1 : ret;
152 memset(dest, 0, size);
153 memcpy(dest, src, len);
158 int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
162 NETLINK_CB(skb).dst_group = group;
164 atomic_inc(&skb->users);
165 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
167 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
171 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
173 struct rtattr *mx = (struct rtattr*)skb->tail;
176 RTA_PUT(skb, RTA_METRICS, 0, NULL);
177 for (i=0; i<RTAX_MAX; i++) {
179 RTA_PUT(skb, i+1, sizeof(u32), metrics+i);
181 mx->rta_len = skb->tail - (u8*)mx;
182 if (mx->rta_len == RTA_LENGTH(0))
183 skb_trim(skb, (u8*)mx - skb->data);
187 skb_trim(skb, (u8*)mx - skb->data);
192 static void set_operstate(struct net_device *dev, unsigned char transition)
194 unsigned char operstate = dev->operstate;
198 if ((operstate == IF_OPER_DORMANT ||
199 operstate == IF_OPER_UNKNOWN) &&
201 operstate = IF_OPER_UP;
204 case IF_OPER_DORMANT:
205 if (operstate == IF_OPER_UP ||
206 operstate == IF_OPER_UNKNOWN)
207 operstate = IF_OPER_DORMANT;
211 if (dev->operstate != operstate) {
212 write_lock_bh(&dev_base_lock);
213 dev->operstate = operstate;
214 write_unlock_bh(&dev_base_lock);
215 netdev_state_change(dev);
219 static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
220 int type, u32 pid, u32 seq, u32 change,
224 struct nlmsghdr *nlh;
225 unsigned char *b = skb->tail;
227 nlh = NLMSG_NEW(skb, pid, seq, type, sizeof(*r), flags);
229 r->ifi_family = AF_UNSPEC;
231 r->ifi_type = dev->type;
232 r->ifi_index = dev->ifindex;
233 r->ifi_flags = dev_get_flags(dev);
234 r->ifi_change = change;
236 RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
239 u32 txqlen = dev->tx_queue_len;
240 RTA_PUT(skb, IFLA_TXQLEN, sizeof(txqlen), &txqlen);
244 u32 weight = dev->weight;
245 RTA_PUT(skb, IFLA_WEIGHT, sizeof(weight), &weight);
249 u8 operstate = netif_running(dev)?dev->operstate:IF_OPER_DOWN;
250 u8 link_mode = dev->link_mode;
251 RTA_PUT(skb, IFLA_OPERSTATE, sizeof(operstate), &operstate);
252 RTA_PUT(skb, IFLA_LINKMODE, sizeof(link_mode), &link_mode);
256 struct rtnl_link_ifmap map = {
257 .mem_start = dev->mem_start,
258 .mem_end = dev->mem_end,
259 .base_addr = dev->base_addr,
262 .port = dev->if_port,
264 RTA_PUT(skb, IFLA_MAP, sizeof(map), &map);
268 RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
269 RTA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
274 RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
277 if (dev->ifindex != dev->iflink) {
278 u32 iflink = dev->iflink;
279 RTA_PUT(skb, IFLA_LINK, sizeof(iflink), &iflink);
282 if (dev->qdisc_sleeping)
283 RTA_PUT(skb, IFLA_QDISC,
284 strlen(dev->qdisc_sleeping->ops->id) + 1,
285 dev->qdisc_sleeping->ops->id);
288 u32 master = dev->master->ifindex;
289 RTA_PUT(skb, IFLA_MASTER, sizeof(master), &master);
292 if (dev->get_stats) {
293 unsigned long *stats = (unsigned long*)dev->get_stats(dev);
298 int n = sizeof(struct rtnl_link_stats)/4;
300 a = __RTA_PUT(skb, IFLA_STATS, n*4);
306 nlh->nlmsg_len = skb->tail - b;
311 skb_trim(skb, b - skb->data);
315 static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
318 int s_idx = cb->args[0];
319 struct net_device *dev;
321 read_lock(&dev_base_lock);
322 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
325 if (vx_info_flags(skb->sk->sk_vx_info, VXF_HIDE_NETIF, 0) &&
326 !dev_in_nx_info(dev, skb->sk->sk_nx_info))
328 if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK,
329 NETLINK_CB(cb->skb).pid,
330 cb->nlh->nlmsg_seq, 0,
334 read_unlock(&dev_base_lock);
340 static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
342 struct ifinfomsg *ifm = NLMSG_DATA(nlh);
343 struct rtattr **ida = arg;
344 struct net_device *dev;
345 int err, send_addr_notify = 0;
347 if (ifm->ifi_index >= 0)
348 dev = dev_get_by_index(ifm->ifi_index);
349 else if (ida[IFLA_IFNAME - 1]) {
350 char ifname[IFNAMSIZ];
352 if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
353 IFNAMSIZ) >= IFNAMSIZ)
355 dev = dev_get_by_name(ifname);
365 dev_change_flags(dev, ifm->ifi_flags);
367 if (ida[IFLA_MAP - 1]) {
368 struct rtnl_link_ifmap *u_map;
371 if (!dev->set_config) {
376 if (!netif_device_present(dev)) {
381 if (ida[IFLA_MAP - 1]->rta_len != RTA_LENGTH(sizeof(*u_map)))
384 u_map = RTA_DATA(ida[IFLA_MAP - 1]);
386 k_map.mem_start = (unsigned long) u_map->mem_start;
387 k_map.mem_end = (unsigned long) u_map->mem_end;
388 k_map.base_addr = (unsigned short) u_map->base_addr;
389 k_map.irq = (unsigned char) u_map->irq;
390 k_map.dma = (unsigned char) u_map->dma;
391 k_map.port = (unsigned char) u_map->port;
393 err = dev->set_config(dev, &k_map);
399 if (ida[IFLA_ADDRESS - 1]) {
403 if (!dev->set_mac_address) {
407 if (!netif_device_present(dev)) {
411 if (ida[IFLA_ADDRESS - 1]->rta_len != RTA_LENGTH(dev->addr_len))
414 len = sizeof(sa_family_t) + dev->addr_len;
415 sa = kmalloc(len, GFP_KERNEL);
420 sa->sa_family = dev->type;
421 memcpy(sa->sa_data, RTA_DATA(ida[IFLA_ADDRESS - 1]),
423 err = dev->set_mac_address(dev, sa);
427 send_addr_notify = 1;
430 if (ida[IFLA_BROADCAST - 1]) {
431 if (ida[IFLA_BROADCAST - 1]->rta_len != RTA_LENGTH(dev->addr_len))
433 memcpy(dev->broadcast, RTA_DATA(ida[IFLA_BROADCAST - 1]),
435 send_addr_notify = 1;
438 if (ida[IFLA_MTU - 1]) {
439 if (ida[IFLA_MTU - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
441 err = dev_set_mtu(dev, *((u32 *) RTA_DATA(ida[IFLA_MTU - 1])));
448 if (ida[IFLA_TXQLEN - 1]) {
449 if (ida[IFLA_TXQLEN - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
452 dev->tx_queue_len = *((u32 *) RTA_DATA(ida[IFLA_TXQLEN - 1]));
455 if (ida[IFLA_WEIGHT - 1]) {
456 if (ida[IFLA_WEIGHT - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
459 dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1]));
462 if (ida[IFLA_OPERSTATE - 1]) {
463 if (ida[IFLA_OPERSTATE - 1]->rta_len != RTA_LENGTH(sizeof(u8)))
466 set_operstate(dev, *((u8 *) RTA_DATA(ida[IFLA_OPERSTATE - 1])));
469 if (ida[IFLA_LINKMODE - 1]) {
470 if (ida[IFLA_LINKMODE - 1]->rta_len != RTA_LENGTH(sizeof(u8)))
473 write_lock_bh(&dev_base_lock);
474 dev->link_mode = *((u8 *) RTA_DATA(ida[IFLA_LINKMODE - 1]));
475 write_unlock_bh(&dev_base_lock);
478 if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) {
479 char ifname[IFNAMSIZ];
481 if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
482 IFNAMSIZ) >= IFNAMSIZ)
484 err = dev_change_name(dev, ifname);
489 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
490 if (ida[IFLA_WIRELESS - 1]) {
492 /* Call Wireless Extensions.
493 * Various stuff checked in there... */
494 err = wireless_rtnetlink_set(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len);
498 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
503 if (send_addr_notify)
504 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
510 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
511 static int do_getlink(struct sk_buff *in_skb, struct nlmsghdr* in_nlh, void *arg)
513 struct ifinfomsg *ifm = NLMSG_DATA(in_nlh);
514 struct rtattr **ida = arg;
515 struct net_device *dev;
517 struct nlmsghdr *nlh;
524 if (ifm->ifi_index >= 0)
525 dev = dev_get_by_index(ifm->ifi_index);
531 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
532 if (ida[IFLA_WIRELESS - 1]) {
534 /* Call Wireless Extensions. We need to know the size before
535 * we can alloc. Various stuff checked in there... */
536 err = wireless_rtnetlink_get(dev, RTA_DATA(ida[IFLA_WIRELESS - 1]), ida[IFLA_WIRELESS - 1]->rta_len, &iw_buf, &iw_buf_len);
540 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
542 /* Create a skb big enough to include all the data.
543 * Some requests are way bigger than 4k... Jean II */
544 skb = alloc_skb((NLMSG_LENGTH(sizeof(*r))) + (RTA_SPACE(iw_buf_len)),
550 /* Put in the message the usual good stuff */
551 nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, in_nlh->nlmsg_seq,
552 RTM_NEWLINK, sizeof(*r));
554 r->ifi_family = AF_UNSPEC;
556 r->ifi_type = dev->type;
557 r->ifi_index = dev->ifindex;
558 r->ifi_flags = dev->flags;
561 /* Put the wireless payload if it exist */
563 RTA_PUT(skb, IFLA_WIRELESS, iw_buf_len,
564 iw_buf + IW_EV_POINT_OFF);
566 nlh->nlmsg_len = skb->tail - b;
569 NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;
571 err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
585 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
587 static int rtnetlink_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
590 int s_idx = cb->family;
594 for (idx=1; idx<NPROTO; idx++) {
595 int type = cb->nlh->nlmsg_type-RTM_BASE;
596 if (idx < s_idx || idx == PF_PACKET)
598 if (rtnetlink_links[idx] == NULL ||
599 rtnetlink_links[idx][type].dumpit == NULL)
602 memset(&cb->args[0], 0, sizeof(cb->args));
603 if (rtnetlink_links[idx][type].dumpit(skb, cb))
611 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
614 int size = NLMSG_SPACE(sizeof(struct ifinfomsg) +
615 sizeof(struct rtnl_link_ifmap) +
616 sizeof(struct rtnl_link_stats) + 128);
618 if (vx_flags(VXF_HIDE_NETIF, 0) &&
619 !dev_in_nx_info(dev, current->nx_info))
621 skb = alloc_skb(size, GFP_KERNEL);
625 if (rtnetlink_fill_ifinfo(skb, dev, type, 0, 0, change, 0) < 0) {
629 NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
630 netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_KERNEL);
633 /* Protected by RTNL sempahore. */
634 static struct rtattr **rta_buf;
635 static int rtattr_max;
637 /* Process one rtnetlink message. */
639 static __inline__ int
640 rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
642 struct rtnetlink_link *link;
643 struct rtnetlink_link *link_tab;
650 /* Only requests are handled by kernel now */
651 if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
654 type = nlh->nlmsg_type;
656 /* A control message: ignore them */
660 /* Unknown message: reply with EINVAL */
666 /* All the messages must have at least 1 byte length */
667 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
670 family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
671 if (family >= NPROTO) {
672 *errp = -EAFNOSUPPORT;
676 link_tab = rtnetlink_links[family];
677 if (link_tab == NULL)
678 link_tab = rtnetlink_links[PF_UNSPEC];
679 link = &link_tab[type];
684 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) {
689 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
690 if (link->dumpit == NULL)
691 link = &(rtnetlink_links[PF_UNSPEC][type]);
693 if (link->dumpit == NULL)
696 if ((*errp = netlink_dump_start(rtnl, skb, nlh,
697 link->dumpit, NULL)) != 0) {
701 netlink_queue_skip(nlh, skb);
705 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
707 min_len = rtm_min[sz_idx];
708 if (nlh->nlmsg_len < min_len)
711 if (nlh->nlmsg_len > min_len) {
712 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
713 struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len);
715 while (RTA_OK(attr, attrlen)) {
716 unsigned flavor = attr->rta_type;
718 if (flavor > rta_max[sz_idx])
720 rta_buf[flavor-1] = attr;
722 attr = RTA_NEXT(attr, attrlen);
726 if (link->doit == NULL)
727 link = &(rtnetlink_links[PF_UNSPEC][type]);
728 if (link->doit == NULL)
730 err = link->doit(skb, nlh, (void *)&rta_buf[0]);
740 static void rtnetlink_rcv(struct sock *sk, int len)
742 unsigned int qlen = 0;
745 mutex_lock(&rtnl_mutex);
746 netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg);
747 mutex_unlock(&rtnl_mutex);
753 static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] =
755 [RTM_GETLINK - RTM_BASE] = {
756 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
758 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
759 .dumpit = rtnetlink_dump_ifinfo },
760 [RTM_SETLINK - RTM_BASE] = { .doit = do_setlink },
761 [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
762 [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
763 [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add },
764 [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete },
765 [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info },
766 [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
767 [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info },
768 [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set },
771 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
773 struct net_device *dev = ptr;
775 case NETDEV_UNREGISTER:
776 rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
778 case NETDEV_REGISTER:
779 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
783 rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING);
786 case NETDEV_GOING_DOWN:
789 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
795 static struct notifier_block rtnetlink_dev_notifier = {
796 .notifier_call = rtnetlink_event,
799 void __init rtnetlink_init(void)
804 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
805 if (rta_max[i] > rtattr_max)
806 rtattr_max = rta_max[i];
807 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
809 panic("rtnetlink_init: cannot allocate rta_buf\n");
811 rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
814 panic("rtnetlink_init: cannot initialize rtnetlink\n");
815 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
816 register_netdevice_notifier(&rtnetlink_dev_notifier);
817 rtnetlink_links[PF_UNSPEC] = link_rtnetlink_table;
818 rtnetlink_links[PF_PACKET] = link_rtnetlink_table;
821 EXPORT_SYMBOL(__rta_fill);
822 EXPORT_SYMBOL(rtattr_strlcpy);
823 EXPORT_SYMBOL(rtattr_parse);
824 EXPORT_SYMBOL(rtnetlink_links);
825 EXPORT_SYMBOL(rtnetlink_put_metrics);
827 EXPORT_SYMBOL(rtnl_lock);
828 EXPORT_SYMBOL(rtnl_trylock);
829 EXPORT_SYMBOL(rtnl_unlock);