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 |
f1379173 | 5 | * Copyright (c) 2005, 2010-2011, 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" | |
b97bf3fd PL |
38 | #include "node_subscr.h" |
39 | #include "node.h" | |
b97bf3fd PL |
40 | |
41 | /** | |
4323add6 | 42 | * tipc_nodesub_subscribe - create "node down" subscription for specified node |
b97bf3fd | 43 | */ |
6c00055a | 44 | void tipc_nodesub_subscribe(struct tipc_node_subscr *node_sub, u32 addr, |
ae8509c4 | 45 | void *usr_handle, net_ev_handler handle_down) |
b97bf3fd | 46 | { |
f0712e86 | 47 | if (in_own_node(addr)) { |
f131072c | 48 | node_sub->node = NULL; |
b97bf3fd | 49 | return; |
f131072c | 50 | } |
c4307285 | 51 | |
f131072c AS |
52 | node_sub->node = tipc_node_find(addr); |
53 | if (!node_sub->node) { | |
2cf8aa19 EH |
54 | pr_warn("Node subscription rejected, unknown node 0x%x\n", |
55 | addr); | |
b97bf3fd PL |
56 | return; |
57 | } | |
b97bf3fd PL |
58 | node_sub->handle_node_down = handle_down; |
59 | node_sub->usr_handle = usr_handle; | |
f131072c | 60 | |
4323add6 | 61 | tipc_node_lock(node_sub->node); |
b97bf3fd | 62 | list_add_tail(&node_sub->nodesub_list, &node_sub->node->nsub); |
4323add6 | 63 | tipc_node_unlock(node_sub->node); |
b97bf3fd PL |
64 | } |
65 | ||
66 | /** | |
4323add6 | 67 | * tipc_nodesub_unsubscribe - cancel "node down" subscription (if any) |
b97bf3fd | 68 | */ |
6c00055a | 69 | void tipc_nodesub_unsubscribe(struct tipc_node_subscr *node_sub) |
b97bf3fd PL |
70 | { |
71 | if (!node_sub->node) | |
72 | return; | |
73 | ||
4323add6 | 74 | tipc_node_lock(node_sub->node); |
b97bf3fd | 75 | list_del_init(&node_sub->nodesub_list); |
4323add6 | 76 | tipc_node_unlock(node_sub->node); |
b97bf3fd | 77 | } |
f1379173 AS |
78 | |
79 | /** | |
80 | * tipc_nodesub_notify - notify subscribers that a node is unreachable | |
81 | * | |
82 | * Note: node is locked by caller | |
83 | */ | |
9db9fdd1 | 84 | void tipc_nodesub_notify(struct list_head *nsub_list) |
f1379173 | 85 | { |
9db9fdd1 | 86 | struct tipc_node_subscr *ns, *safe; |
3d09fc42 | 87 | net_ev_handler handle_node_down; |
f1379173 | 88 | |
9db9fdd1 | 89 | list_for_each_entry_safe(ns, safe, nsub_list, nodesub_list) { |
3d09fc42 JPM |
90 | handle_node_down = ns->handle_node_down; |
91 | if (handle_node_down) { | |
f1379173 | 92 | ns->handle_node_down = NULL; |
3d09fc42 | 93 | handle_node_down(ns->usr_handle); |
f1379173 AS |
94 | } |
95 | } | |
96 | } |