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>
38 #include <linux/if_addr.h>
40 #include <asm/uaccess.h>
41 #include <asm/system.h>
42 #include <asm/string.h>
44 #include <linux/inet.h>
45 #include <linux/netdevice.h>
47 #include <net/protocol.h>
49 #include <net/route.h>
52 #include <net/pkt_sched.h>
53 #include <net/fib_rules.h>
54 #include <net/netlink.h>
55 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
56 #include <linux/wireless.h>
57 #include <net/iw_handler.h>
58 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
60 static DEFINE_MUTEX(rtnl_mutex);
64 mutex_lock(&rtnl_mutex);
67 void __rtnl_unlock(void)
69 mutex_unlock(&rtnl_mutex);
72 void rtnl_unlock(void)
74 mutex_unlock(&rtnl_mutex);
75 if (rtnl && rtnl->sk_receive_queue.qlen)
76 rtnl->sk_data_ready(rtnl, 0);
80 int rtnl_trylock(void)
82 return mutex_trylock(&rtnl_mutex);
85 int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
87 memset(tb, 0, sizeof(struct rtattr*)*maxattr);
89 while (RTA_OK(rta, len)) {
90 unsigned flavor = rta->rta_type;
91 if (flavor && flavor <= maxattr)
93 rta = RTA_NEXT(rta, len);
100 struct rtnetlink_link * rtnetlink_links[NPROTO];
102 static const int rtm_min[RTM_NR_FAMILIES] =
104 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
105 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
106 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
107 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
108 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
109 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
110 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)),
111 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)),
112 [RTM_FAM(RTM_NEWPREFIX)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
113 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
114 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
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_NEWRULE)] = FRA_MAX,
123 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
124 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
125 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
126 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
129 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
132 int size = RTA_LENGTH(attrlen);
134 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
135 rta->rta_type = attrtype;
137 memcpy(RTA_DATA(rta), data, attrlen);
138 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
141 size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
143 size_t ret = RTA_PAYLOAD(rta);
144 char *src = RTA_DATA(rta);
146 if (ret > 0 && src[ret - 1] == '\0')
149 size_t len = (ret >= size) ? size - 1 : ret;
150 memset(dest, 0, size);
151 memcpy(dest, src, len);
156 int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
160 NETLINK_CB(skb).dst_group = group;
162 atomic_inc(&skb->users);
163 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
165 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
169 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
171 struct rtattr *mx = (struct rtattr*)skb->tail;
174 RTA_PUT(skb, RTA_METRICS, 0, NULL);
175 for (i=0; i<RTAX_MAX; i++) {
177 RTA_PUT(skb, i+1, sizeof(u32), metrics+i);
179 mx->rta_len = skb->tail - (u8*)mx;
180 if (mx->rta_len == RTA_LENGTH(0))
181 skb_trim(skb, (u8*)mx - skb->data);
185 skb_trim(skb, (u8*)mx - skb->data);
190 static void set_operstate(struct net_device *dev, unsigned char transition)
192 unsigned char operstate = dev->operstate;
196 if ((operstate == IF_OPER_DORMANT ||
197 operstate == IF_OPER_UNKNOWN) &&
199 operstate = IF_OPER_UP;
202 case IF_OPER_DORMANT:
203 if (operstate == IF_OPER_UP ||
204 operstate == IF_OPER_UNKNOWN)
205 operstate = IF_OPER_DORMANT;
209 if (dev->operstate != operstate) {
210 write_lock_bh(&dev_base_lock);
211 dev->operstate = operstate;
212 write_unlock_bh(&dev_base_lock);
213 netdev_state_change(dev);
217 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
218 struct net_device_stats *b)
220 a->rx_packets = b->rx_packets;
221 a->tx_packets = b->tx_packets;
222 a->rx_bytes = b->rx_bytes;
223 a->tx_bytes = b->tx_bytes;
224 a->rx_errors = b->rx_errors;
225 a->tx_errors = b->tx_errors;
226 a->rx_dropped = b->rx_dropped;
227 a->tx_dropped = b->tx_dropped;
229 a->multicast = b->multicast;
230 a->collisions = b->collisions;
232 a->rx_length_errors = b->rx_length_errors;
233 a->rx_over_errors = b->rx_over_errors;
234 a->rx_crc_errors = b->rx_crc_errors;
235 a->rx_frame_errors = b->rx_frame_errors;
236 a->rx_fifo_errors = b->rx_fifo_errors;
237 a->rx_missed_errors = b->rx_missed_errors;
239 a->tx_aborted_errors = b->tx_aborted_errors;
240 a->tx_carrier_errors = b->tx_carrier_errors;
241 a->tx_fifo_errors = b->tx_fifo_errors;
242 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
243 a->tx_window_errors = b->tx_window_errors;
245 a->rx_compressed = b->rx_compressed;
246 a->tx_compressed = b->tx_compressed;
249 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
250 void *iwbuf, int iwbuflen, int type, u32 pid,
251 u32 seq, u32 change, unsigned int flags)
253 struct ifinfomsg *ifm;
254 struct nlmsghdr *nlh;
256 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
260 ifm = nlmsg_data(nlh);
261 ifm->ifi_family = AF_UNSPEC;
263 ifm->ifi_type = dev->type;
264 ifm->ifi_index = dev->ifindex;
265 ifm->ifi_flags = dev_get_flags(dev);
266 ifm->ifi_change = change;
268 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
269 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
270 NLA_PUT_U32(skb, IFLA_WEIGHT, dev->weight);
271 NLA_PUT_U8(skb, IFLA_OPERSTATE,
272 netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
273 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
274 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
276 if (dev->ifindex != dev->iflink)
277 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
280 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
282 if (dev->qdisc_sleeping)
283 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id);
286 struct rtnl_link_ifmap map = {
287 .mem_start = dev->mem_start,
288 .mem_end = dev->mem_end,
289 .base_addr = dev->base_addr,
292 .port = dev->if_port,
294 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
298 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
299 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
302 if (dev->get_stats) {
303 struct net_device_stats *stats = dev->get_stats(dev);
307 attr = nla_reserve(skb, IFLA_STATS,
308 sizeof(struct rtnl_link_stats));
310 goto nla_put_failure;
312 copy_rtnl_link_stats(nla_data(attr), stats);
317 NLA_PUT(skb, IFLA_WIRELESS, iwbuflen, iwbuf);
319 return nlmsg_end(skb, nlh);
322 return nlmsg_cancel(skb, nlh);
325 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
328 int s_idx = cb->args[0];
329 struct net_device *dev;
331 read_lock(&dev_base_lock);
332 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
335 if (rtnl_fill_ifinfo(skb, dev, NULL, 0, RTM_NEWLINK,
336 NETLINK_CB(cb->skb).pid,
337 cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0)
340 read_unlock(&dev_base_lock);
346 static struct nla_policy ifla_policy[IFLA_MAX+1] __read_mostly = {
347 [IFLA_IFNAME] = { .type = NLA_STRING },
348 [IFLA_MAP] = { .minlen = sizeof(struct rtnl_link_ifmap) },
349 [IFLA_MTU] = { .type = NLA_U32 },
350 [IFLA_TXQLEN] = { .type = NLA_U32 },
351 [IFLA_WEIGHT] = { .type = NLA_U32 },
352 [IFLA_OPERSTATE] = { .type = NLA_U8 },
353 [IFLA_LINKMODE] = { .type = NLA_U8 },
356 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
358 struct ifinfomsg *ifm;
359 struct net_device *dev;
360 int err, send_addr_notify = 0, modified = 0;
361 struct nlattr *tb[IFLA_MAX+1];
362 char ifname[IFNAMSIZ];
364 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
368 if (tb[IFLA_IFNAME] &&
369 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ) >= IFNAMSIZ)
373 ifm = nlmsg_data(nlh);
374 if (ifm->ifi_index >= 0)
375 dev = dev_get_by_index(ifm->ifi_index);
376 else if (tb[IFLA_IFNAME])
377 dev = dev_get_by_name(ifname);
386 if (tb[IFLA_ADDRESS] &&
387 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
390 if (tb[IFLA_BROADCAST] &&
391 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
395 struct rtnl_link_ifmap *u_map;
398 if (!dev->set_config) {
403 if (!netif_device_present(dev)) {
408 u_map = nla_data(tb[IFLA_MAP]);
409 k_map.mem_start = (unsigned long) u_map->mem_start;
410 k_map.mem_end = (unsigned long) u_map->mem_end;
411 k_map.base_addr = (unsigned short) u_map->base_addr;
412 k_map.irq = (unsigned char) u_map->irq;
413 k_map.dma = (unsigned char) u_map->dma;
414 k_map.port = (unsigned char) u_map->port;
416 err = dev->set_config(dev, &k_map);
423 if (tb[IFLA_ADDRESS]) {
427 if (!dev->set_mac_address) {
432 if (!netif_device_present(dev)) {
437 len = sizeof(sa_family_t) + dev->addr_len;
438 sa = kmalloc(len, GFP_KERNEL);
443 sa->sa_family = dev->type;
444 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
446 err = dev->set_mac_address(dev, sa);
450 send_addr_notify = 1;
455 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
462 * Interface selected by interface index but interface
463 * name provided implies that a name change has been
466 if (ifm->ifi_index >= 0 && ifname[0]) {
467 err = dev_change_name(dev, ifname);
473 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
474 if (tb[IFLA_WIRELESS]) {
475 /* Call Wireless Extensions.
476 * Various stuff checked in there... */
477 err = wireless_rtnetlink_set(dev, nla_data(tb[IFLA_WIRELESS]),
478 nla_len(tb[IFLA_WIRELESS]));
482 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
484 if (tb[IFLA_BROADCAST]) {
485 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
486 send_addr_notify = 1;
491 dev_change_flags(dev, ifm->ifi_flags);
494 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
497 dev->weight = nla_get_u32(tb[IFLA_WEIGHT]);
499 if (tb[IFLA_OPERSTATE])
500 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
502 if (tb[IFLA_LINKMODE]) {
503 write_lock_bh(&dev_base_lock);
504 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
505 write_unlock_bh(&dev_base_lock);
511 if (err < 0 && modified && net_ratelimit())
512 printk(KERN_WARNING "A link change request failed with "
513 "some changes comitted already. Interface %s may "
514 "have been left with an inconsistent configuration, "
515 "please check.\n", dev->name);
517 if (send_addr_notify)
518 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
525 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
527 struct ifinfomsg *ifm;
528 struct nlattr *tb[IFLA_MAX+1];
529 struct net_device *dev = NULL;
530 struct sk_buff *nskb;
531 char *iw_buf = NULL, *iw = NULL;
535 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
539 ifm = nlmsg_data(nlh);
540 if (ifm->ifi_index >= 0) {
541 dev = dev_get_by_index(ifm->ifi_index);
548 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
549 if (tb[IFLA_WIRELESS]) {
550 /* Call Wireless Extensions. We need to know the size before
551 * we can alloc. Various stuff checked in there... */
552 err = wireless_rtnetlink_get(dev, nla_data(tb[IFLA_WIRELESS]),
553 nla_len(tb[IFLA_WIRELESS]),
554 &iw_buf, &iw_buf_len);
558 iw += IW_EV_POINT_OFF;
560 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
562 payload = NLMSG_ALIGN(sizeof(struct ifinfomsg) +
563 nla_total_size(iw_buf_len));
564 nskb = nlmsg_new(nlmsg_total_size(payload), GFP_KERNEL);
570 err = rtnl_fill_ifinfo(nskb, dev, iw, iw_buf_len, RTM_NEWLINK,
571 NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0, 0);
577 err = netlink_unicast(rtnl, skb, NETLINK_CB(skb).pid, MSG_DONTWAIT);
587 static int rtnl_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 skb = nlmsg_new(size, GFP_KERNEL);
622 if (rtnl_fill_ifinfo(skb, dev, NULL, 0, type, 0, 0, change, 0) < 0) {
626 NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
627 netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_KERNEL);
630 /* Protected by RTNL sempahore. */
631 static struct rtattr **rta_buf;
632 static int rtattr_max;
634 /* Process one rtnetlink message. */
636 static __inline__ int
637 rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
639 struct rtnetlink_link *link;
640 struct rtnetlink_link *link_tab;
647 /* Only requests are handled by kernel now */
648 if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
651 type = nlh->nlmsg_type;
653 /* A control message: ignore them */
657 /* Unknown message: reply with EINVAL */
663 /* All the messages must have at least 1 byte length */
664 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
667 family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
668 if (family >= NPROTO) {
669 *errp = -EAFNOSUPPORT;
673 link_tab = rtnetlink_links[family];
674 if (link_tab == NULL)
675 link_tab = rtnetlink_links[PF_UNSPEC];
676 link = &link_tab[type];
681 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) {
686 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
687 if (link->dumpit == NULL)
688 link = &(rtnetlink_links[PF_UNSPEC][type]);
690 if (link->dumpit == NULL)
693 if ((*errp = netlink_dump_start(rtnl, skb, nlh,
694 link->dumpit, NULL)) != 0) {
698 netlink_queue_skip(nlh, skb);
702 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
704 min_len = rtm_min[sz_idx];
705 if (nlh->nlmsg_len < min_len)
708 if (nlh->nlmsg_len > min_len) {
709 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
710 struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len);
712 while (RTA_OK(attr, attrlen)) {
713 unsigned flavor = attr->rta_type;
715 if (flavor > rta_max[sz_idx])
717 rta_buf[flavor-1] = attr;
719 attr = RTA_NEXT(attr, attrlen);
723 if (link->doit == NULL)
724 link = &(rtnetlink_links[PF_UNSPEC][type]);
725 if (link->doit == NULL)
727 err = link->doit(skb, nlh, (void *)&rta_buf[0]);
737 static void rtnetlink_rcv(struct sock *sk, int len)
739 unsigned int qlen = 0;
742 mutex_lock(&rtnl_mutex);
743 netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg);
744 mutex_unlock(&rtnl_mutex);
750 static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] =
752 [RTM_GETLINK - RTM_BASE] = { .doit = rtnl_getlink,
753 .dumpit = rtnl_dump_ifinfo },
754 [RTM_SETLINK - RTM_BASE] = { .doit = rtnl_setlink },
755 [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnl_dump_all },
756 [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnl_dump_all },
757 [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add },
758 [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete },
759 [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info },
760 #ifdef CONFIG_FIB_RULES
761 [RTM_NEWRULE - RTM_BASE] = { .doit = fib_nl_newrule },
762 [RTM_DELRULE - RTM_BASE] = { .doit = fib_nl_delrule },
764 [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnl_dump_all },
765 [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info },
766 [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set },
769 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
771 struct net_device *dev = ptr;
773 case NETDEV_UNREGISTER:
774 rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
776 case NETDEV_REGISTER:
777 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
781 rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING);
784 case NETDEV_GOING_DOWN:
787 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
793 static struct notifier_block rtnetlink_dev_notifier = {
794 .notifier_call = rtnetlink_event,
797 void __init rtnetlink_init(void)
802 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
803 if (rta_max[i] > rtattr_max)
804 rtattr_max = rta_max[i];
805 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
807 panic("rtnetlink_init: cannot allocate rta_buf\n");
809 rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
812 panic("rtnetlink_init: cannot initialize rtnetlink\n");
813 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
814 register_netdevice_notifier(&rtnetlink_dev_notifier);
815 rtnetlink_links[PF_UNSPEC] = link_rtnetlink_table;
816 rtnetlink_links[PF_PACKET] = link_rtnetlink_table;
819 EXPORT_SYMBOL(__rta_fill);
820 EXPORT_SYMBOL(rtattr_strlcpy);
821 EXPORT_SYMBOL(rtattr_parse);
822 EXPORT_SYMBOL(rtnetlink_links);
823 EXPORT_SYMBOL(rtnetlink_put_metrics);
825 EXPORT_SYMBOL(rtnl_lock);
826 EXPORT_SYMBOL(rtnl_trylock);
827 EXPORT_SYMBOL(rtnl_unlock);