blob: eb1bb4dce7af950f43bbf6c5899f649ea170e986 [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/netlink.c: TIPC configuration handling
3 *
Per Liden593a5f22006-01-11 19:14:19 +01004 * Copyright (c) 2005-2006, Ericsson AB
Per Lidenb97bf3f2006-01-02 19:04:38 +01005 * Copyright (c) 2005, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "config.h"
39#include <net/genetlink.h>
40
41static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
42{
43 struct sk_buff *rep_buf;
44 struct nlmsghdr *rep_nlh;
45 struct nlmsghdr *req_nlh = info->nlhdr;
46 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
Per Liden1dba9742006-01-05 16:34:00 +010047 int hdr_space = NLMSG_SPACE(GENL_HDRLEN + TIPC_GENL_HDRLEN);
Per Lidenb97bf3f2006-01-02 19:04:38 +010048
49 if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN)))
Per Liden4323add2006-01-18 00:38:21 +010050 rep_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
Per Lidenb97bf3f2006-01-02 19:04:38 +010051 else
Per Liden4323add2006-01-18 00:38:21 +010052 rep_buf = tipc_cfg_do_cmd(req_userhdr->dest,
53 req_userhdr->cmd,
54 NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
55 NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
56 hdr_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +010057
58 if (rep_buf) {
59 skb_push(rep_buf, hdr_space);
60 rep_nlh = (struct nlmsghdr *)rep_buf->data;
61 memcpy(rep_nlh, req_nlh, hdr_space);
62 rep_nlh->nlmsg_len = rep_buf->len;
63 genlmsg_unicast(rep_buf, req_nlh->nlmsg_pid);
64 }
65
66 return 0;
67}
68
69static struct genl_family family = {
Per Liden1dba9742006-01-05 16:34:00 +010070 .id = GENL_ID_GENERATE,
Per Lidenb97bf3f2006-01-02 19:04:38 +010071 .name = TIPC_GENL_NAME,
72 .version = TIPC_GENL_VERSION,
73 .hdrsize = TIPC_GENL_HDRLEN,
74 .maxattr = 0,
Per Lidenb97bf3f2006-01-02 19:04:38 +010075};
76
77static struct genl_ops ops = {
78 .cmd = TIPC_GENL_CMD,
79 .doit = handle_cmd,
80};
81
82static int family_registered = 0;
83
Per Liden4323add2006-01-18 00:38:21 +010084int tipc_netlink_start(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +010085{
Jon Maloyb70e4f42006-01-10 18:54:24 +000086
87
Per Lidenb97bf3f2006-01-02 19:04:38 +010088 if (genl_register_family(&family))
89 goto err;
90
91 family_registered = 1;
92
93 if (genl_register_ops(&family, &ops))
94 goto err_unregister;
95
Jon Maloyb70e4f42006-01-10 18:54:24 +000096 return 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +010097
98 err_unregister:
99 genl_unregister_family(&family);
100 family_registered = 0;
101 err:
Per Lidend0a14a92006-01-11 13:52:51 +0100102 err("Failed to register netlink interface\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100103 return -EFAULT;
104}
105
Per Liden4323add2006-01-18 00:38:21 +0100106void tipc_netlink_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100107{
108 if (family_registered) {
109 genl_unregister_family(&family);
110 family_registered = 0;
111 }
112}