blob: 2d778dfc449273f53403a1f0f92377be40eaf82c [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/netlink.c: TIPC configuration handling
3 *
4 * Copyright (c) 2005, Wind River Systems
5 * Copyright (c) 2005-2006, Ericsson AB
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
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.
19 *
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
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include "core.h"
34#include "config.h"
35#include <net/genetlink.h>
36
37static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
38{
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;
Per Liden1dba9742006-01-05 16:34:00 +010043 int hdr_space = NLMSG_SPACE(GENL_HDRLEN + TIPC_GENL_HDRLEN);
Per Lidenb97bf3f2006-01-02 19:04:38 +010044
45 if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN)))
46 rep_buf = cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
47 else
48 rep_buf = cfg_do_cmd(req_userhdr->dest,
49 req_userhdr->cmd,
50 NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
51 NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
52 hdr_space);
53
54 if (rep_buf) {
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);
60 }
61
62 return 0;
63}
64
65static struct genl_family family = {
Per Liden1dba9742006-01-05 16:34:00 +010066 .id = GENL_ID_GENERATE,
Per Lidenb97bf3f2006-01-02 19:04:38 +010067 .name = TIPC_GENL_NAME,
68 .version = TIPC_GENL_VERSION,
69 .hdrsize = TIPC_GENL_HDRLEN,
70 .maxattr = 0,
71 .owner = THIS_MODULE,
72};
73
74static struct genl_ops ops = {
75 .cmd = TIPC_GENL_CMD,
76 .doit = handle_cmd,
77};
78
79static int family_registered = 0;
80
81int netlink_start(void)
82{
Jon Maloyb70e4f42006-01-10 18:54:24 +000083
84
Per Lidenb97bf3f2006-01-02 19:04:38 +010085 if (genl_register_family(&family))
86 goto err;
87
88 family_registered = 1;
89
90 if (genl_register_ops(&family, &ops))
91 goto err_unregister;
92
Jon Maloyb70e4f42006-01-10 18:54:24 +000093 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +010094
95 err_unregister:
96 genl_unregister_family(&family);
97 family_registered = 0;
98 err:
99 err("Failed to register netlink interface");
100 return -EFAULT;
101}
102
103void netlink_stop(void)
104{
105 if (family_registered) {
106 genl_unregister_family(&family);
107 family_registered = 0;
108 }
109}