corosync  2.4.2-dirty
exec/quorum.c
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1 /*
2  * Copyright (c) 2008-2012 Red Hat, Inc.
3  *
4  * All rights reserved.
5  *
6  * Author: Christine Caulfield (ccaulfie@redhat.com)
7  *
8  * This software licensed under BSD license, the text of which follows:
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions are met:
12  *
13  * - Redistributions of source code must retain the above copyright notice,
14  * this list of conditions and the following disclaimer.
15  * - Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  * - Neither the name of the MontaVista Software, Inc. nor the names of its
19  * contributors may be used to endorse or promote products derived from this
20  * software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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33  */
34 
35 #include <config.h>
36 
37 #include <sys/types.h>
38 #include <sys/socket.h>
39 #include <sys/un.h>
40 #include <sys/ioctl.h>
41 #include <netinet/in.h>
42 #include <sys/uio.h>
43 #include <unistd.h>
44 #include <fcntl.h>
45 #include <stdlib.h>
46 #include <stdio.h>
47 #include <errno.h>
48 #include <time.h>
49 #include <unistd.h>
50 #include <netinet/in.h>
51 #include <arpa/inet.h>
52 
53 #include <corosync/corotypes.h>
54 #include <corosync/swab.h>
55 #include <corosync/totem/totempg.h>
56 #include <corosync/totem/totem.h>
57 #include <corosync/logsys.h>
58 
59 #include "quorum.h"
60 #include "main.h"
61 #include "vsf.h"
62 
63 LOGSYS_DECLARE_SUBSYS ("QUORUM");
64 
65 static struct quorum_callin_functions *corosync_quorum_fns = NULL;
66 
68 {
69  if (corosync_quorum_fns) {
70  return corosync_quorum_fns->quorate();
71  }
72  else {
73  return 1;
74  }
75 }
76 
78 {
79  if (corosync_quorum_fns) {
80  return corosync_quorum_fns->register_callback(fn, context);
81  }
82  else {
83  return 0;
84  }
85 }
86 
88 {
89  if (corosync_quorum_fns) {
90  return corosync_quorum_fns->unregister_callback(fn, context);
91  }
92  else {
93  return 0;
94  }
95 }
96 
98 {
99  if (corosync_quorum_fns)
100  return -1;
101 
102  corosync_quorum_fns = fns;
103  return 0;
104 }
105 
106 int quorum_none(void)
107 {
108  if (corosync_quorum_fns)
109  return 0;
110  else
111  return 1;
112 }
int(* quorate)(void)
Definition: coroapi.h:205
int corosync_quorum_is_quorate(void)
Definition: exec/quorum.c:67
int quorum_none(void)
Definition: exec/quorum.c:106
Totem Single Ring Protocol.
int corosync_quorum_initialize(struct quorum_callin_functions *fns)
Definition: exec/quorum.c:97
int corosync_quorum_register_callback(quorum_callback_fn_t fn, void *context)
Definition: exec/quorum.c:77
The quorum_callin_functions struct.
Definition: coroapi.h:204
LOGSYS_DECLARE_SUBSYS("QUORUM")
int corosync_quorum_unregister_callback(quorum_callback_fn_t fn, void *context)
Definition: exec/quorum.c:87
int(* unregister_callback)(quorum_callback_fn_t callback_fn, void *context)
Definition: coroapi.h:207
int(* register_callback)(quorum_callback_fn_t callback_fn, void *contexxt)
Definition: coroapi.h:206
void(* quorum_callback_fn_t)(int quorate, void *context)
The quorum_callback_fn_t callback.
Definition: coroapi.h:199