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tipc: add neighbor monitoring framework
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1/*
2 * net/tipc/monitor.h
3 *
4 * Copyright (c) 2015, Ericsson AB
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the names of the copyright holders nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * Alternatively, this software may be distributed under the terms of the
20 * GNU General Public License ("GPL") version 2 as published by the Free
21 * Software Foundation.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36#ifndef _TIPC_MONITOR_H
37#define _TIPC_MONITOR_H
38
39/* struct tipc_mon_state: link instance's cache of monitor list and domain state
40 * @list_gen: current generation of this node's monitor list
41 * @gen: current generation of this node's local domain
42 * @peer_gen: most recent domain generation received from peer
43 * @acked_gen: most recent generation of self's domain acked by peer
44 * @monitoring: this peer endpoint should continuously monitored
45 * @probing: peer endpoint should be temporarily probed for potential loss
46 * @synched: domain record's generation has been synched with peer after reset
47 */
48struct tipc_mon_state {
49 u16 list_gen;
50 u16 peer_gen;
51 u16 acked_gen;
52 bool monitoring :1;
53 bool probing :1;
54 bool reset :1;
55 bool synched :1;
56};
57
58int tipc_mon_create(struct net *net, int bearer_id);
59void tipc_mon_delete(struct net *net, int bearer_id);
60
61void tipc_mon_peer_up(struct net *net, u32 addr, int bearer_id);
62void tipc_mon_peer_down(struct net *net, u32 addr, int bearer_id);
63void tipc_mon_prep(struct net *net, void *data, int *dlen,
64 struct tipc_mon_state *state, int bearer_id);
65void tipc_mon_rcv(struct net *net, void *data, u16 dlen, u32 addr,
66 struct tipc_mon_state *state, int bearer_id);
67void tipc_mon_get_state(struct net *net, u32 addr,
68 struct tipc_mon_state *state,
69 int bearer_id);
70void tipc_mon_remove_peer(struct net *net, u32 addr, int bearer_id);
71
72extern const int tipc_max_domain_size;
73#endif