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 #include "netlink.h"
40
41 /* struct tipc_mon_state: link instance's cache of monitor list and domain state
42 * @list_gen: current generation of this node's monitor list
43 * @gen: current generation of this node's local domain
44 * @peer_gen: most recent domain generation received from peer
45 * @acked_gen: most recent generation of self's domain acked by peer
46 * @monitoring: this peer endpoint should continuously monitored
47 * @probing: peer endpoint should be temporarily probed for potential loss
48 * @synched: domain record's generation has been synched with peer after reset
49 */
50 struct tipc_mon_state {
51 u16 list_gen;
52 u16 peer_gen;
53 u16 acked_gen;
54 bool monitoring :1;
55 bool probing :1;
56 bool reset :1;
57 bool synched :1;
58 };
59
60 int tipc_mon_create(struct net *net, int bearer_id);
61 void tipc_mon_delete(struct net *net, int bearer_id);
62
63 void tipc_mon_peer_up(struct net *net, u32 addr, int bearer_id);
64 void tipc_mon_peer_down(struct net *net, u32 addr, int bearer_id);
65 void tipc_mon_prep(struct net *net, void *data, int *dlen,
66 struct tipc_mon_state *state, int bearer_id);
67 void tipc_mon_rcv(struct net *net, void *data, u16 dlen, u32 addr,
68 struct tipc_mon_state *state, int bearer_id);
69 void tipc_mon_get_state(struct net *net, u32 addr,
70 struct tipc_mon_state *state,
71 int bearer_id);
72 void tipc_mon_remove_peer(struct net *net, u32 addr, int bearer_id);
73
74 int tipc_nl_monitor_set_threshold(struct net *net, u32 cluster_size);
75 int tipc_nl_monitor_get_threshold(struct net *net);
76 int __tipc_nl_add_monitor(struct net *net, struct tipc_nl_msg *msg,
77 u32 bearer_id);
78 int tipc_nl_add_monitor_peer(struct net *net, struct tipc_nl_msg *msg,
79 u32 bearer_id, u32 *prev_node);
80 void tipc_mon_reinit_self(struct net *net);
81
82 extern const int tipc_max_domain_size;
83 #endif