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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/node_subscr.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/node_subscr.c')
-rw-r--r--net/tipc/node_subscr.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/net/tipc/node_subscr.c b/net/tipc/node_subscr.c
new file mode 100644
index 000000000000..c38a3b0e847d
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+++ b/net/tipc/node_subscr.c
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1/*
2 * net/tipc/node_subscr.c: TIPC "node down" subscription handling
3 *
4 * Copyright (c) 2003-2005, Ericsson Research Canada
5 * Copyright (c) 2005, Wind River Systems
6 * Copyright (c) 2005-2006, Ericsson AB
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 *
12 * Redistributions of source code must retain the above copyright notice, this
13 * list of conditions and the following disclaimer.
14 * Redistributions in binary form must reproduce the above copyright notice,
15 * this list of conditions and the following disclaimer in the documentation
16 * and/or other materials provided with the distribution.
17 * Neither the names of the copyright holders nor the names of its
18 * contributors may be used to endorse or promote products derived from this
19 * software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include "core.h"
35#include "dbg.h"
36#include "node_subscr.h"
37#include "node.h"
38#include "addr.h"
39
40/**
41 * nodesub_subscribe - create "node down" subscription for specified node
42 */
43
44void nodesub_subscribe(struct node_subscr *node_sub, u32 addr,
45 void *usr_handle, net_ev_handler handle_down)
46{
47 node_sub->node = 0;
48 if (addr == tipc_own_addr)
49 return;
50 if (!addr_node_valid(addr)) {
51 warn("node_subscr with illegal %x\n", addr);
52 return;
53 }
54
55 node_sub->handle_node_down = handle_down;
56 node_sub->usr_handle = usr_handle;
57 node_sub->node = node_find(addr);
58 assert(node_sub->node);
59 node_lock(node_sub->node);
60 list_add_tail(&node_sub->nodesub_list, &node_sub->node->nsub);
61 node_unlock(node_sub->node);
62}
63
64/**
65 * nodesub_unsubscribe - cancel "node down" subscription (if any)
66 */
67
68void nodesub_unsubscribe(struct node_subscr *node_sub)
69{
70 if (!node_sub->node)
71 return;
72
73 node_lock(node_sub->node);
74 list_del_init(&node_sub->nodesub_list);
75 node_unlock(node_sub->node);
76}