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
84