blob: c38a3b0e847d0d6e3376af35719b22ac3b26e28a [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
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}