2 * net/tipc/node_subscr.c: TIPC "node down" subscription handling
4 * Copyright (c) 1995-2006, Ericsson AB
5 * Copyright (c) 2005, Wind River Systems
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39 #include "node_subscr.h"
44 * tipc_nodesub_subscribe - create "node down" subscription for specified node
47 void tipc_nodesub_subscribe(struct tipc_node_subscr *node_sub, u32 addr,
48 void *usr_handle, net_ev_handler handle_down)
50 if (addr == tipc_own_addr) {
51 node_sub->node = NULL;
55 node_sub->node = tipc_node_find(addr);
56 if (!node_sub->node) {
57 warn("Node subscription rejected, unknown node 0x%x\n", addr);
60 node_sub->handle_node_down = handle_down;
61 node_sub->usr_handle = usr_handle;
63 tipc_node_lock(node_sub->node);
64 list_add_tail(&node_sub->nodesub_list, &node_sub->node->nsub);
65 tipc_node_unlock(node_sub->node);
69 * tipc_nodesub_unsubscribe - cancel "node down" subscription (if any)
72 void tipc_nodesub_unsubscribe(struct tipc_node_subscr *node_sub)
77 tipc_node_lock(node_sub->node);
78 list_del_init(&node_sub->nodesub_list);
79 tipc_node_unlock(node_sub->node);