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);
61 static struct sock *rtnl;
65 mutex_lock(&rtnl_mutex);
68 void __rtnl_unlock(void)
70 mutex_unlock(&rtnl_mutex);
73 void rtnl_unlock(void)
75 mutex_unlock(&rtnl_mutex);
76 if (rtnl && rtnl->sk_receive_queue.qlen)
77 rtnl->sk_data_ready(rtnl, 0);
81 int rtnl_trylock(void)
83 return mutex_trylock(&rtnl_mutex);
86 int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
88 memset(tb, 0, sizeof(struct rtattr*)*maxattr);
90 while (RTA_OK(rta, len)) {
91 unsigned flavor = rta->rta_type;
92 if (flavor && flavor <= maxattr)
94 rta = RTA_NEXT(rta, len);
99 struct rtnetlink_link * rtnetlink_links[NPROTO];
101 static const int rtm_min[RTM_NR_FAMILIES] =
103 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
104 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
105 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)),
106 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
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)),
116 static const int rta_max[RTM_NR_FAMILIES] =
118 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX,
119 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX,
120 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX,
121 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX,
122 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX,
123 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX,
124 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX,
125 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX,
128 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
131 int size = RTA_LENGTH(attrlen);
133 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
134 rta->rta_type = attrtype;
136 memcpy(RTA_DATA(rta), data, attrlen);
137 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
140 size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
142 size_t ret = RTA_PAYLOAD(rta);
143 char *src = RTA_DATA(rta);
145 if (ret > 0 && src[ret - 1] == '\0')
148 size_t len = (ret >= size) ? size - 1 : ret;
149 memset(dest, 0, size);
150 memcpy(dest, src, len);
155 int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
159 NETLINK_CB(skb).dst_group = group;
161 atomic_inc(&skb->users);
162 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
164 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
168 int rtnl_unicast(struct sk_buff *skb, u32 pid)
170 return nlmsg_unicast(rtnl, skb, pid);
173 int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group,
174 struct nlmsghdr *nlh, gfp_t flags)
179 report = nlmsg_report(nlh);
181 return nlmsg_notify(rtnl, skb, pid, group, report, flags);
184 void rtnl_set_sk_err(u32 group, int error)
186 netlink_set_err(rtnl, 0, group, error);
189 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
194 mx = nla_nest_start(skb, RTA_METRICS);
198 for (i = 0; i < RTAX_MAX; i++) {
201 NLA_PUT_U32(skb, i+1, metrics[i]);
206 goto nla_put_failure;
208 return nla_nest_end(skb, mx);
211 return nla_nest_cancel(skb, mx);
215 static void set_operstate(struct net_device *dev, unsigned char transition)
217 unsigned char operstate = dev->operstate;
221 if ((operstate == IF_OPER_DORMANT ||
222 operstate == IF_OPER_UNKNOWN) &&
224 operstate = IF_OPER_UP;
227 case IF_OPER_DORMANT:
228 if (operstate == IF_OPER_UP ||
229 operstate == IF_OPER_UNKNOWN)
230 operstate = IF_OPER_DORMANT;
234 if (dev->operstate != operstate) {
235 write_lock_bh(&dev_base_lock);
236 dev->operstate = operstate;
237 write_unlock_bh(&dev_base_lock);
238 netdev_state_change(dev);
242 static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
243 struct net_device_stats *b)
245 a->rx_packets = b->rx_packets;
246 a->tx_packets = b->tx_packets;
247 a->rx_bytes = b->rx_bytes;
248 a->tx_bytes = b->tx_bytes;
249 a->rx_errors = b->rx_errors;
250 a->tx_errors = b->tx_errors;
251 a->rx_dropped = b->rx_dropped;
252 a->tx_dropped = b->tx_dropped;
254 a->multicast = b->multicast;
255 a->collisions = b->collisions;
257 a->rx_length_errors = b->rx_length_errors;
258 a->rx_over_errors = b->rx_over_errors;
259 a->rx_crc_errors = b->rx_crc_errors;
260 a->rx_frame_errors = b->rx_frame_errors;
261 a->rx_fifo_errors = b->rx_fifo_errors;
262 a->rx_missed_errors = b->rx_missed_errors;
264 a->tx_aborted_errors = b->tx_aborted_errors;
265 a->tx_carrier_errors = b->tx_carrier_errors;
266 a->tx_fifo_errors = b->tx_fifo_errors;
267 a->tx_heartbeat_errors = b->tx_heartbeat_errors;
268 a->tx_window_errors = b->tx_window_errors;
270 a->rx_compressed = b->rx_compressed;
271 a->tx_compressed = b->tx_compressed;
274 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
275 void *iwbuf, int iwbuflen, int type, u32 pid,
276 u32 seq, u32 change, unsigned int flags)
278 struct ifinfomsg *ifm;
279 struct nlmsghdr *nlh;
281 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags);
285 ifm = nlmsg_data(nlh);
286 ifm->ifi_family = AF_UNSPEC;
288 ifm->ifi_type = dev->type;
289 ifm->ifi_index = dev->ifindex;
290 ifm->ifi_flags = dev_get_flags(dev);
291 ifm->ifi_change = change;
293 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
294 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len);
295 NLA_PUT_U32(skb, IFLA_WEIGHT, dev->weight);
296 NLA_PUT_U8(skb, IFLA_OPERSTATE,
297 netif_running(dev) ? dev->operstate : IF_OPER_DOWN);
298 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode);
299 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
301 if (dev->ifindex != dev->iflink)
302 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
305 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex);
307 if (dev->qdisc_sleeping)
308 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id);
311 struct rtnl_link_ifmap map = {
312 .mem_start = dev->mem_start,
313 .mem_end = dev->mem_end,
314 .base_addr = dev->base_addr,
317 .port = dev->if_port,
319 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map);
323 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
324 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
327 if (dev->get_stats) {
328 struct net_device_stats *stats = dev->get_stats(dev);
332 attr = nla_reserve(skb, IFLA_STATS,
333 sizeof(struct rtnl_link_stats));
335 goto nla_put_failure;
337 copy_rtnl_link_stats(nla_data(attr), stats);
342 NLA_PUT(skb, IFLA_WIRELESS, iwbuflen, iwbuf);
344 return nlmsg_end(skb, nlh);
347 return nlmsg_cancel(skb, nlh);
350 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
353 int s_idx = cb->args[0];
354 struct net_device *dev;
356 read_lock(&dev_base_lock);
357 for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
360 if (rtnl_fill_ifinfo(skb, dev, NULL, 0, RTM_NEWLINK,
361 NETLINK_CB(cb->skb).pid,
362 cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0)
365 read_unlock(&dev_base_lock);
371 static struct nla_policy ifla_policy[IFLA_MAX+1] __read_mostly = {
372 [IFLA_IFNAME] = { .type = NLA_STRING },
373 [IFLA_MAP] = { .minlen = sizeof(struct rtnl_link_ifmap) },
374 [IFLA_MTU] = { .type = NLA_U32 },
375 [IFLA_TXQLEN] = { .type = NLA_U32 },
376 [IFLA_WEIGHT] = { .type = NLA_U32 },
377 [IFLA_OPERSTATE] = { .type = NLA_U8 },
378 [IFLA_LINKMODE] = { .type = NLA_U8 },
381 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
383 struct ifinfomsg *ifm;
384 struct net_device *dev;
385 int err, send_addr_notify = 0, modified = 0;
386 struct nlattr *tb[IFLA_MAX+1];
387 char ifname[IFNAMSIZ];
389 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
393 if (tb[IFLA_IFNAME] &&
394 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ) >= IFNAMSIZ)
398 ifm = nlmsg_data(nlh);
399 if (ifm->ifi_index >= 0)
400 dev = dev_get_by_index(ifm->ifi_index);
401 else if (tb[IFLA_IFNAME])
402 dev = dev_get_by_name(ifname);
411 if (tb[IFLA_ADDRESS] &&
412 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len)
415 if (tb[IFLA_BROADCAST] &&
416 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len)
420 struct rtnl_link_ifmap *u_map;
423 if (!dev->set_config) {
428 if (!netif_device_present(dev)) {
433 u_map = nla_data(tb[IFLA_MAP]);
434 k_map.mem_start = (unsigned long) u_map->mem_start;
435 k_map.mem_end = (unsigned long) u_map->mem_end;
436 k_map.base_addr = (unsigned short) u_map->base_addr;
437 k_map.irq = (unsigned char) u_map->irq;
438 k_map.dma = (unsigned char) u_map->dma;
439 k_map.port = (unsigned char) u_map->port;
441 err = dev->set_config(dev, &k_map);
448 if (tb[IFLA_ADDRESS]) {
452 if (!dev->set_mac_address) {
457 if (!netif_device_present(dev)) {
462 len = sizeof(sa_family_t) + dev->addr_len;
463 sa = kmalloc(len, GFP_KERNEL);
468 sa->sa_family = dev->type;
469 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]),
471 err = dev->set_mac_address(dev, sa);
475 send_addr_notify = 1;
480 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
487 * Interface selected by interface index but interface
488 * name provided implies that a name change has been
491 if (ifm->ifi_index >= 0 && ifname[0]) {
492 err = dev_change_name(dev, ifname);
498 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
499 if (tb[IFLA_WIRELESS]) {
500 /* Call Wireless Extensions.
501 * Various stuff checked in there... */
502 err = wireless_rtnetlink_set(dev, nla_data(tb[IFLA_WIRELESS]),
503 nla_len(tb[IFLA_WIRELESS]));
507 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
509 if (tb[IFLA_BROADCAST]) {
510 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len);
511 send_addr_notify = 1;
516 dev_change_flags(dev, ifm->ifi_flags);
519 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
522 dev->weight = nla_get_u32(tb[IFLA_WEIGHT]);
524 if (tb[IFLA_OPERSTATE])
525 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE]));
527 if (tb[IFLA_LINKMODE]) {
528 write_lock_bh(&dev_base_lock);
529 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
530 write_unlock_bh(&dev_base_lock);
536 if (err < 0 && modified && net_ratelimit())
537 printk(KERN_WARNING "A link change request failed with "
538 "some changes comitted already. Interface %s may "
539 "have been left with an inconsistent configuration, "
540 "please check.\n", dev->name);
542 if (send_addr_notify)
543 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
550 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
552 struct ifinfomsg *ifm;
553 struct nlattr *tb[IFLA_MAX+1];
554 struct net_device *dev = NULL;
555 struct sk_buff *nskb;
556 char *iw_buf = NULL, *iw = NULL;
560 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
564 ifm = nlmsg_data(nlh);
565 if (ifm->ifi_index >= 0) {
566 dev = dev_get_by_index(ifm->ifi_index);
573 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
574 if (tb[IFLA_WIRELESS]) {
575 /* Call Wireless Extensions. We need to know the size before
576 * we can alloc. Various stuff checked in there... */
577 err = wireless_rtnetlink_get(dev, nla_data(tb[IFLA_WIRELESS]),
578 nla_len(tb[IFLA_WIRELESS]),
579 &iw_buf, &iw_buf_len);
583 iw += IW_EV_POINT_OFF;
585 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
587 payload = NLMSG_ALIGN(sizeof(struct ifinfomsg) +
588 nla_total_size(iw_buf_len));
589 nskb = nlmsg_new(nlmsg_total_size(payload), GFP_KERNEL);
595 err = rtnl_fill_ifinfo(nskb, dev, iw, iw_buf_len, RTM_NEWLINK,
596 NETLINK_CB(skb).pid, nlh->nlmsg_seq, 0, 0);
602 err = rtnl_unicast(skb, NETLINK_CB(skb).pid);
610 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
613 int s_idx = cb->family;
617 for (idx=1; idx<NPROTO; idx++) {
618 int type = cb->nlh->nlmsg_type-RTM_BASE;
619 if (idx < s_idx || idx == PF_PACKET)
621 if (rtnetlink_links[idx] == NULL ||
622 rtnetlink_links[idx][type].dumpit == NULL)
625 memset(&cb->args[0], 0, sizeof(cb->args));
626 if (rtnetlink_links[idx][type].dumpit(skb, cb))
634 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
639 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
643 err = rtnl_fill_ifinfo(skb, dev, NULL, 0, type, 0, 0, change, 0);
649 err = rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_KERNEL);
652 rtnl_set_sk_err(RTNLGRP_LINK, err);
655 /* Protected by RTNL sempahore. */
656 static struct rtattr **rta_buf;
657 static int rtattr_max;
659 /* Process one rtnetlink message. */
661 static __inline__ int
662 rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
664 struct rtnetlink_link *link;
665 struct rtnetlink_link *link_tab;
672 /* Only requests are handled by kernel now */
673 if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
676 type = nlh->nlmsg_type;
678 /* A control message: ignore them */
682 /* Unknown message: reply with EINVAL */
688 /* All the messages must have at least 1 byte length */
689 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
692 family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
693 if (family >= NPROTO) {
694 *errp = -EAFNOSUPPORT;
698 link_tab = rtnetlink_links[family];
699 if (link_tab == NULL)
700 link_tab = rtnetlink_links[PF_UNSPEC];
701 link = &link_tab[type];
706 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) {
711 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
712 if (link->dumpit == NULL)
713 link = &(rtnetlink_links[PF_UNSPEC][type]);
715 if (link->dumpit == NULL)
718 if ((*errp = netlink_dump_start(rtnl, skb, nlh,
719 link->dumpit, NULL)) != 0) {
723 netlink_queue_skip(nlh, skb);
727 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
729 min_len = rtm_min[sz_idx];
730 if (nlh->nlmsg_len < min_len)
733 if (nlh->nlmsg_len > min_len) {
734 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
735 struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len);
737 while (RTA_OK(attr, attrlen)) {
738 unsigned flavor = attr->rta_type;
740 if (flavor > rta_max[sz_idx])
742 rta_buf[flavor-1] = attr;
744 attr = RTA_NEXT(attr, attrlen);
748 if (link->doit == NULL)
749 link = &(rtnetlink_links[PF_UNSPEC][type]);
750 if (link->doit == NULL)
752 err = link->doit(skb, nlh, (void *)&rta_buf[0]);
762 static void rtnetlink_rcv(struct sock *sk, int len)
764 unsigned int qlen = 0;
767 mutex_lock(&rtnl_mutex);
768 netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg);
769 mutex_unlock(&rtnl_mutex);
775 static struct rtnetlink_link link_rtnetlink_table[RTM_NR_MSGTYPES] =
777 [RTM_GETLINK - RTM_BASE] = { .doit = rtnl_getlink,
778 .dumpit = rtnl_dump_ifinfo },
779 [RTM_SETLINK - RTM_BASE] = { .doit = rtnl_setlink },
780 [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnl_dump_all },
781 [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnl_dump_all },
782 [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add },
783 [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete },
784 [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info },
785 #ifdef CONFIG_FIB_RULES
786 [RTM_NEWRULE - RTM_BASE] = { .doit = fib_nl_newrule },
787 [RTM_DELRULE - RTM_BASE] = { .doit = fib_nl_delrule },
789 [RTM_GETRULE - RTM_BASE] = { .dumpit = rtnl_dump_all },
790 [RTM_GETNEIGHTBL - RTM_BASE] = { .dumpit = neightbl_dump_info },
791 [RTM_SETNEIGHTBL - RTM_BASE] = { .doit = neightbl_set },
794 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
796 struct net_device *dev = ptr;
798 case NETDEV_UNREGISTER:
799 rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
801 case NETDEV_REGISTER:
802 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
806 rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING);
809 case NETDEV_GOING_DOWN:
812 rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
818 static struct notifier_block rtnetlink_dev_notifier = {
819 .notifier_call = rtnetlink_event,
822 void __init rtnetlink_init(void)
827 for (i = 0; i < ARRAY_SIZE(rta_max); i++)
828 if (rta_max[i] > rtattr_max)
829 rtattr_max = rta_max[i];
830 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
832 panic("rtnetlink_init: cannot allocate rta_buf\n");
834 rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
837 panic("rtnetlink_init: cannot initialize rtnetlink\n");
838 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
839 register_netdevice_notifier(&rtnetlink_dev_notifier);
840 rtnetlink_links[PF_UNSPEC] = link_rtnetlink_table;
841 rtnetlink_links[PF_PACKET] = link_rtnetlink_table;
844 EXPORT_SYMBOL(__rta_fill);
845 EXPORT_SYMBOL(rtattr_strlcpy);
846 EXPORT_SYMBOL(rtattr_parse);
847 EXPORT_SYMBOL(rtnetlink_links);
848 EXPORT_SYMBOL(rtnetlink_put_metrics);
849 EXPORT_SYMBOL(rtnl_lock);
850 EXPORT_SYMBOL(rtnl_trylock);
851 EXPORT_SYMBOL(rtnl_unlock);
852 EXPORT_SYMBOL(rtnl_unicast);
853 EXPORT_SYMBOL(rtnl_notify);
854 EXPORT_SYMBOL(rtnl_set_sk_err);