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 (rtnetlink_fill_ifinfo(skb
, dev
, RTM_NEWLINK
,
326 NETLINK_CB(cb
->skb
).pid
,
327 cb
->nlh
->nlmsg_seq
, 0,
331 read_unlock(&dev_base_lock
);
337 static int do_setlink(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
339 struct ifinfomsg
*ifm
= NLMSG_DATA(nlh
);
340 struct rtattr
**ida
= arg
;
341 struct net_device
*dev
;
342 int err
, send_addr_notify
= 0;
344 if (ifm
->ifi_index
>= 0)
345 dev
= dev_get_by_index(ifm
->ifi_index
);
346 else if (ida
[IFLA_IFNAME
- 1]) {
347 char ifname
[IFNAMSIZ
];
349 if (rtattr_strlcpy(ifname
, ida
[IFLA_IFNAME
- 1],
350 IFNAMSIZ
) >= IFNAMSIZ
)
352 dev
= dev_get_by_name(ifname
);
362 dev_change_flags(dev
, ifm
->ifi_flags
);
364 if (ida
[IFLA_MAP
- 1]) {
365 struct rtnl_link_ifmap
*u_map
;
368 if (!dev
->set_config
) {
373 if (!netif_device_present(dev
)) {
378 if (ida
[IFLA_MAP
- 1]->rta_len
!= RTA_LENGTH(sizeof(*u_map
)))
381 u_map
= RTA_DATA(ida
[IFLA_MAP
- 1]);
383 k_map
.mem_start
= (unsigned long) u_map
->mem_start
;
384 k_map
.mem_end
= (unsigned long) u_map
->mem_end
;
385 k_map
.base_addr
= (unsigned short) u_map
->base_addr
;
386 k_map
.irq
= (unsigned char) u_map
->irq
;
387 k_map
.dma
= (unsigned char) u_map
->dma
;
388 k_map
.port
= (unsigned char) u_map
->port
;
390 err
= dev
->set_config(dev
, &k_map
);
396 if (ida
[IFLA_ADDRESS
- 1]) {
397 if (!dev
->set_mac_address
) {
401 if (!netif_device_present(dev
)) {
405 if (ida
[IFLA_ADDRESS
- 1]->rta_len
!= RTA_LENGTH(dev
->addr_len
))
408 err
= dev
->set_mac_address(dev
, RTA_DATA(ida
[IFLA_ADDRESS
- 1]));
411 send_addr_notify
= 1;
414 if (ida
[IFLA_BROADCAST
- 1]) {
415 if (ida
[IFLA_BROADCAST
- 1]->rta_len
!= RTA_LENGTH(dev
->addr_len
))
417 memcpy(dev
->broadcast
, RTA_DATA(ida
[IFLA_BROADCAST
- 1]),
419 send_addr_notify
= 1;
422 if (ida
[IFLA_MTU
- 1]) {
423 if (ida
[IFLA_MTU
- 1]->rta_len
!= RTA_LENGTH(sizeof(u32
)))
425 err
= dev_set_mtu(dev
, *((u32
*) RTA_DATA(ida
[IFLA_MTU
- 1])));
432 if (ida
[IFLA_TXQLEN
- 1]) {
433 if (ida
[IFLA_TXQLEN
- 1]->rta_len
!= RTA_LENGTH(sizeof(u32
)))
436 dev
->tx_queue_len
= *((u32
*) RTA_DATA(ida
[IFLA_TXQLEN
- 1]));
439 if (ida
[IFLA_WEIGHT
- 1]) {
440 if (ida
[IFLA_WEIGHT
- 1]->rta_len
!= RTA_LENGTH(sizeof(u32
)))
443 dev
->weight
= *((u32
*) RTA_DATA(ida
[IFLA_WEIGHT
- 1]));
446 if (ida
[IFLA_OPERSTATE
- 1]) {
447 if (ida
[IFLA_OPERSTATE
- 1]->rta_len
!= RTA_LENGTH(sizeof(u8
)))
450 set_operstate(dev
, *((u8
*) RTA_DATA(ida
[IFLA_OPERSTATE
- 1])));
453 if (ida
[IFLA_LINKMODE
- 1]) {
454 if (ida
[IFLA_LINKMODE
- 1]->rta_len
!= RTA_LENGTH(sizeof(u8
)))
457 write_lock_bh(&dev_base_lock
);
458 dev
->link_mode
= *((u8
*) RTA_DATA(ida
[IFLA_LINKMODE
- 1]));
459 write_unlock_bh(&dev_base_lock
);
462 if (ifm
->ifi_index
>= 0 && ida
[IFLA_IFNAME
- 1]) {
463 char ifname
[IFNAMSIZ
];
465 if (rtattr_strlcpy(ifname
, ida
[IFLA_IFNAME
- 1],
466 IFNAMSIZ
) >= IFNAMSIZ
)
468 err
= dev_change_name(dev
, ifname
);
473 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
474 if (ida
[IFLA_WIRELESS
- 1]) {
476 /* Call Wireless Extensions.
477 * Various stuff checked in there... */
478 err
= wireless_rtnetlink_set(dev
, RTA_DATA(ida
[IFLA_WIRELESS
- 1]), ida
[IFLA_WIRELESS
- 1]->rta_len
);
482 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
487 if (send_addr_notify
)
488 call_netdevice_notifiers(NETDEV_CHANGEADDR
, dev
);
494 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
495 static int do_getlink(struct sk_buff
*in_skb
, struct nlmsghdr
* in_nlh
, void *arg
)
497 struct ifinfomsg
*ifm
= NLMSG_DATA(in_nlh
);
498 struct rtattr
**ida
= arg
;
499 struct net_device
*dev
;
501 struct nlmsghdr
*nlh
;
508 if (ifm
->ifi_index
>= 0)
509 dev
= dev_get_by_index(ifm
->ifi_index
);
515 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
516 if (ida
[IFLA_WIRELESS
- 1]) {
518 /* Call Wireless Extensions. We need to know the size before
519 * we can alloc. Various stuff checked in there... */
520 err
= wireless_rtnetlink_get(dev
, RTA_DATA(ida
[IFLA_WIRELESS
- 1]), ida
[IFLA_WIRELESS
- 1]->rta_len
, &iw_buf
, &iw_buf_len
);
524 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
526 /* Create a skb big enough to include all the data.
527 * Some requests are way bigger than 4k... Jean II */
528 skb
= alloc_skb((NLMSG_LENGTH(sizeof(*r
))) + (RTA_SPACE(iw_buf_len
)),
534 /* Put in the message the usual good stuff */
535 nlh
= NLMSG_PUT(skb
, NETLINK_CB(in_skb
).pid
, in_nlh
->nlmsg_seq
,
536 RTM_NEWLINK
, sizeof(*r
));
538 r
->ifi_family
= AF_UNSPEC
;
540 r
->ifi_type
= dev
->type
;
541 r
->ifi_index
= dev
->ifindex
;
542 r
->ifi_flags
= dev
->flags
;
545 /* Put the wireless payload if it exist */
547 RTA_PUT(skb
, IFLA_WIRELESS
, iw_buf_len
,
548 iw_buf
+ IW_EV_POINT_OFF
);
550 nlh
->nlmsg_len
= skb
->tail
- b
;
553 NETLINK_CB(skb
).dst_pid
= NETLINK_CB(in_skb
).pid
;
555 err
= netlink_unicast(rtnl
, skb
, NETLINK_CB(in_skb
).pid
, MSG_DONTWAIT
);
569 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
571 static int rtnetlink_dump_all(struct sk_buff
*skb
, struct netlink_callback
*cb
)
574 int s_idx
= cb
->family
;
578 for (idx
=1; idx
<NPROTO
; idx
++) {
579 int type
= cb
->nlh
->nlmsg_type
-RTM_BASE
;
580 if (idx
< s_idx
|| idx
== PF_PACKET
)
582 if (rtnetlink_links
[idx
] == NULL
||
583 rtnetlink_links
[idx
][type
].dumpit
== NULL
)
586 memset(&cb
->args
[0], 0, sizeof(cb
->args
));
587 if (rtnetlink_links
[idx
][type
].dumpit(skb
, cb
))
595 void rtmsg_ifinfo(int type
, struct net_device
*dev
, unsigned change
)
598 int size
= NLMSG_SPACE(sizeof(struct ifinfomsg
) +
599 sizeof(struct rtnl_link_ifmap
) +
600 sizeof(struct rtnl_link_stats
) + 128);
602 skb
= alloc_skb(size
, GFP_KERNEL
);
606 if (rtnetlink_fill_ifinfo(skb
, dev
, type
, 0, 0, change
, 0) < 0) {
610 NETLINK_CB(skb
).dst_group
= RTNLGRP_LINK
;
611 netlink_broadcast(rtnl
, skb
, 0, RTNLGRP_LINK
, GFP_KERNEL
);
614 /* Protected by RTNL sempahore. */
615 static struct rtattr
**rta_buf
;
616 static int rtattr_max
;
618 /* Process one rtnetlink message. */
620 static __inline__
int
621 rtnetlink_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, int *errp
)
623 struct rtnetlink_link
*link
;
624 struct rtnetlink_link
*link_tab
;
631 /* Only requests are handled by kernel now */
632 if (!(nlh
->nlmsg_flags
&NLM_F_REQUEST
))
635 type
= nlh
->nlmsg_type
;
637 /* A control message: ignore them */
641 /* Unknown message: reply with EINVAL */
647 /* All the messages must have at least 1 byte length */
648 if (nlh
->nlmsg_len
< NLMSG_LENGTH(sizeof(struct rtgenmsg
)))
651 family
= ((struct rtgenmsg
*)NLMSG_DATA(nlh
))->rtgen_family
;
652 if (family
>= NPROTO
) {
653 *errp
= -EAFNOSUPPORT
;
657 link_tab
= rtnetlink_links
[family
];
658 if (link_tab
== NULL
)
659 link_tab
= rtnetlink_links
[PF_UNSPEC
];
660 link
= &link_tab
[type
];
665 if (kind
!= 2 && security_netlink_recv(skb
, CAP_NET_ADMIN
)) {
670 if (kind
== 2 && nlh
->nlmsg_flags
&NLM_F_DUMP
) {
671 if (link
->dumpit
== NULL
)
672 link
= &(rtnetlink_links
[PF_UNSPEC
][type
]);
674 if (link
->dumpit
== NULL
)
677 if ((*errp
= netlink_dump_start(rtnl
, skb
, nlh
,
678 link
->dumpit
, NULL
)) != 0) {
682 netlink_queue_skip(nlh
, skb
);
686 memset(rta_buf
, 0, (rtattr_max
* sizeof(struct rtattr
*)));
688 min_len
= rtm_min
[sz_idx
];
689 if (nlh
->nlmsg_len
< min_len
)
692 if (nlh
->nlmsg_len
> min_len
) {
693 int attrlen
= nlh
->nlmsg_len
- NLMSG_ALIGN(min_len
);
694 struct rtattr
*attr
= (void*)nlh
+ NLMSG_ALIGN(min_len
);
696 while (RTA_OK(attr
, attrlen
)) {
697 unsigned flavor
= attr
->rta_type
;
699 if (flavor
> rta_max
[sz_idx
])
701 rta_buf
[flavor
-1] = attr
;
703 attr
= RTA_NEXT(attr
, attrlen
);
707 if (link
->doit
== NULL
)
708 link
= &(rtnetlink_links
[PF_UNSPEC
][type
]);
709 if (link
->doit
== NULL
)
711 err
= link
->doit(skb
, nlh
, (void *)&rta_buf
[0]);
721 static void rtnetlink_rcv(struct sock
*sk
, int len
)
723 unsigned int qlen
= 0;
726 mutex_lock(&rtnl_mutex
);
727 netlink_run_queue(sk
, &qlen
, &rtnetlink_rcv_msg
);
728 mutex_unlock(&rtnl_mutex
);
734 static struct rtnetlink_link link_rtnetlink_table
[RTM_NR_MSGTYPES
] =
736 [RTM_GETLINK
- RTM_BASE
] = {
737 #ifdef CONFIG_NET_WIRELESS_RTNETLINK
739 #endif /* CONFIG_NET_WIRELESS_RTNETLINK */
740 .dumpit
= rtnetlink_dump_ifinfo
},
741 [RTM_SETLINK
- RTM_BASE
] = { .doit
= do_setlink
},
742 [RTM_GETADDR
- RTM_BASE
] = { .dumpit
= rtnetlink_dump_all
},
743 [RTM_GETROUTE
- RTM_BASE
] = { .dumpit
= rtnetlink_dump_all
},
744 [RTM_NEWNEIGH
- RTM_BASE
] = { .doit
= neigh_add
},
745 [RTM_DELNEIGH
- RTM_BASE
] = { .doit
= neigh_delete
},
746 [RTM_GETNEIGH
- RTM_BASE
] = { .dumpit
= neigh_dump_info
},
747 [RTM_GETRULE
- RTM_BASE
] = { .dumpit
= rtnetlink_dump_all
},
748 [RTM_GETNEIGHTBL
- RTM_BASE
] = { .dumpit
= neightbl_dump_info
},
749 [RTM_SETNEIGHTBL
- RTM_BASE
] = { .doit
= neightbl_set
},
752 static int rtnetlink_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
754 struct net_device
*dev
= ptr
;
756 case NETDEV_UNREGISTER
:
757 rtmsg_ifinfo(RTM_DELLINK
, dev
, ~0U);
759 case NETDEV_REGISTER
:
760 rtmsg_ifinfo(RTM_NEWLINK
, dev
, ~0U);
764 rtmsg_ifinfo(RTM_NEWLINK
, dev
, IFF_UP
|IFF_RUNNING
);
767 case NETDEV_GOING_DOWN
:
770 rtmsg_ifinfo(RTM_NEWLINK
, dev
, 0);
776 static struct notifier_block rtnetlink_dev_notifier
= {
777 .notifier_call
= rtnetlink_event
,
780 void __init
rtnetlink_init(void)
785 for (i
= 0; i
< ARRAY_SIZE(rta_max
); i
++)
786 if (rta_max
[i
] > rtattr_max
)
787 rtattr_max
= rta_max
[i
];
788 rta_buf
= kmalloc(rtattr_max
* sizeof(struct rtattr
*), GFP_KERNEL
);
790 panic("rtnetlink_init: cannot allocate rta_buf\n");
792 rtnl
= netlink_kernel_create(NETLINK_ROUTE
, RTNLGRP_MAX
, rtnetlink_rcv
,
795 panic("rtnetlink_init: cannot initialize rtnetlink\n");
796 netlink_set_nonroot(NETLINK_ROUTE
, NL_NONROOT_RECV
);
797 register_netdevice_notifier(&rtnetlink_dev_notifier
);
798 rtnetlink_links
[PF_UNSPEC
] = link_rtnetlink_table
;
799 rtnetlink_links
[PF_PACKET
] = link_rtnetlink_table
;
802 EXPORT_SYMBOL(__rta_fill
);
803 EXPORT_SYMBOL(rtattr_strlcpy
);
804 EXPORT_SYMBOL(rtattr_parse
);
805 EXPORT_SYMBOL(rtnetlink_links
);
806 EXPORT_SYMBOL(rtnetlink_put_metrics
);
808 EXPORT_SYMBOL(rtnl_lock
);
809 EXPORT_SYMBOL(rtnl_trylock
);
810 EXPORT_SYMBOL(rtnl_unlock
);