2 * net/tipc/netlink.c: TIPC configuration handling
4 * Copyright (c) 2005, Wind River Systems
5 * Copyright (c) 2005-2006, Ericsson AB
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * Redistributions of source code must retain the above copyright notice, this
12 * list of conditions and the following disclaimer.
13 * Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from this
18 * software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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30 * POSSIBILITY OF SUCH DAMAGE.
35 #include <net/genetlink.h>
37 static int handle_cmd(struct sk_buff
*skb
, struct genl_info
*info
)
39 struct sk_buff
*rep_buf
;
40 struct nlmsghdr
*rep_nlh
;
41 struct nlmsghdr
*req_nlh
= info
->nlhdr
;
42 struct tipc_genlmsghdr
*req_userhdr
= info
->userhdr
;
43 int hdr_space
= NLMSG_SPACE(0);
45 if ((req_userhdr
->cmd
& 0xC000) && (!capable(CAP_NET_ADMIN
)))
46 rep_buf
= cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN
);
48 rep_buf
= cfg_do_cmd(req_userhdr
->dest
,
50 NLMSG_DATA(req_nlh
) + GENL_HDRLEN
+ TIPC_GENL_HDRLEN
,
51 NLMSG_PAYLOAD(req_nlh
, GENL_HDRLEN
+ TIPC_GENL_HDRLEN
),
55 skb_push(rep_buf
, hdr_space
);
56 rep_nlh
= (struct nlmsghdr
*)rep_buf
->data
;
57 memcpy(rep_nlh
, req_nlh
, hdr_space
);
58 rep_nlh
->nlmsg_len
= rep_buf
->len
;
59 genlmsg_unicast(rep_buf
, req_nlh
->nlmsg_pid
);
65 static struct genl_family family
= {
66 .id
= TIPC_GENL_FAMILY
,
67 .name
= TIPC_GENL_NAME
,
68 .version
= TIPC_GENL_VERSION
,
69 .hdrsize
= TIPC_GENL_HDRLEN
,
74 static struct genl_ops ops
= {
79 static int family_registered
= 0;
81 int netlink_start(void)
83 if (genl_register_family(&family
))
86 family_registered
= 1;
88 if (genl_register_ops(&family
, &ops
))
94 genl_unregister_family(&family
);
95 family_registered
= 0;
97 err("Failed to register netlink interface");
101 void netlink_stop(void)
103 if (family_registered
) {
104 genl_unregister_family(&family
);
105 family_registered
= 0;
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