Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/node_subscr.c: TIPC "node down" subscription handling | |
c4307285 | 3 | * |
593a5f22 | 4 | * Copyright (c) 1995-2006, Ericsson AB |
b97bf3fd | 5 | * Copyright (c) 2005, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
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 | /** | |
4323add6 | 44 | * tipc_nodesub_subscribe - create "node down" subscription for specified node |
b97bf3fd PL |
45 | */ |
46 | ||
6c00055a | 47 | void tipc_nodesub_subscribe(struct tipc_node_subscr *node_sub, u32 addr, |
b97bf3fd PL |
48 | void *usr_handle, net_ev_handler handle_down) |
49 | { | |
f131072c AS |
50 | if (addr == tipc_own_addr) { |
51 | node_sub->node = NULL; | |
b97bf3fd | 52 | return; |
f131072c | 53 | } |
c4307285 | 54 | |
f131072c AS |
55 | node_sub->node = tipc_node_find(addr); |
56 | if (!node_sub->node) { | |
57 | warn("Node subscription rejected, unknown node 0x%x\n", addr); | |
b97bf3fd PL |
58 | return; |
59 | } | |
b97bf3fd PL |
60 | node_sub->handle_node_down = handle_down; |
61 | node_sub->usr_handle = usr_handle; | |
f131072c | 62 | |
4323add6 | 63 | tipc_node_lock(node_sub->node); |
b97bf3fd | 64 | list_add_tail(&node_sub->nodesub_list, &node_sub->node->nsub); |
4323add6 | 65 | tipc_node_unlock(node_sub->node); |
b97bf3fd PL |
66 | } |
67 | ||
68 | /** | |
4323add6 | 69 | * tipc_nodesub_unsubscribe - cancel "node down" subscription (if any) |
b97bf3fd PL |
70 | */ |
71 | ||
6c00055a | 72 | void tipc_nodesub_unsubscribe(struct tipc_node_subscr *node_sub) |
b97bf3fd PL |
73 | { |
74 | if (!node_sub->node) | |
75 | return; | |
76 | ||
4323add6 | 77 | tipc_node_lock(node_sub->node); |
b97bf3fd | 78 | list_del_init(&node_sub->nodesub_list); |
4323add6 | 79 | tipc_node_unlock(node_sub->node); |
b97bf3fd | 80 | } |