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authorPer Liden <per.liden@nospam.ericsson.com>2006-01-02 13:04:38 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-12 17:06:31 -0500
commitb97bf3fd8f6a16966d4f18983b2c40993ff937d4 (patch)
tree59959f8a0f3087455efdcb430846686f303c5991 /net/tipc/netlink.c
parent58cba4650a7a414eabd2b40cc9d8e45fcdf192d9 (diff)
[TIPC] Initial merge
TIPC (Transparent Inter Process Communication) is a protocol designed for intra cluster communication. For more information see http://tipc.sourceforge.net Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
Diffstat (limited to 'net/tipc/netlink.c')
-rw-r--r--net/tipc/netlink.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
new file mode 100644
index 000000000000..35fbc7933604
--- /dev/null
+++ b/net/tipc/netlink.c
@@ -0,0 +1,107 @@
1/*
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;
43 int hdr_space = NLMSG_SPACE(0);
44
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 = {
66 .id = TIPC_GENL_FAMILY,
67 .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{
83 if (genl_register_family(&family))
84 goto err;
85
86 family_registered = 1;
87
88 if (genl_register_ops(&family, &ops))
89 goto err_unregister;
90
91 return 0;
92
93 err_unregister:
94 genl_unregister_family(&family);
95 family_registered = 0;
96 err:
97 err("Failed to register netlink interface");
98 return -EFAULT;
99}
100
101void netlink_stop(void)
102{
103 if (family_registered) {
104 genl_unregister_family(&family);
105 family_registered = 0;
106 }
107}