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1 | /* |
2 | * net/tipc/node_subscr.c: TIPC "node down" subscription handling | |
3 | * | |
9da1c8b6 | 4 | * Copyright (c) 2003-2006, Ericsson AB |
b97bf3fd | 5 | * Copyright (c) 2005, Wind River Systems |
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6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
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9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
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11 | * 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. | |
b97bf3fd | 19 | * |
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20 | * 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 | |
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34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #include "core.h" | |
38 | #include "dbg.h" | |
39 | #include "node_subscr.h" | |
40 | #include "node.h" | |
41 | #include "addr.h" | |
42 | ||
43 | /** | |
44 | * nodesub_subscribe - create "node down" subscription for specified node | |
45 | */ | |
46 | ||
47 | void nodesub_subscribe(struct node_subscr *node_sub, u32 addr, | |
48 | void *usr_handle, net_ev_handler handle_down) | |
49 | { | |
50 | node_sub->node = 0; | |
51 | if (addr == tipc_own_addr) | |
52 | return; | |
53 | if (!addr_node_valid(addr)) { | |
54 | warn("node_subscr with illegal %x\n", addr); | |
55 | return; | |
56 | } | |
57 | ||
58 | node_sub->handle_node_down = handle_down; | |
59 | node_sub->usr_handle = usr_handle; | |
60 | node_sub->node = node_find(addr); | |
61 | assert(node_sub->node); | |
62 | node_lock(node_sub->node); | |
63 | list_add_tail(&node_sub->nodesub_list, &node_sub->node->nsub); | |
64 | node_unlock(node_sub->node); | |
65 | } | |
66 | ||
67 | /** | |
68 | * nodesub_unsubscribe - cancel "node down" subscription (if any) | |
69 | */ | |
70 | ||
71 | void nodesub_unsubscribe(struct node_subscr *node_sub) | |
72 | { | |
73 | if (!node_sub->node) | |
74 | return; | |
75 | ||
76 | node_lock(node_sub->node); | |
77 | list_del_init(&node_sub->nodesub_list); | |
78 | node_unlock(node_sub->node); | |
79 | } |