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.\"/*
.\" * Copyright (c) 2012 Red Hat, Inc.
.\" *
.\" * All rights reserved.
.\" *
.\" * Author: Fabio M. Di Nitto <fdinitto@redhat.com>
.\" *
.\" * This software licensed under BSD license, the text of which follows:
.\" *
.\" * Redistribution and use in source and binary forms, with or without
.\" * modification, are permitted provided that the following conditions are met:
.\" *
.\" * - Redistributions of source code must retain the above copyright notice,
.\" * this list of conditions and the following disclaimer.
.\" * - Redistributions in binary form must reproduce the above copyright notice,
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.\" * and/or other materials provided with the distribution.
.\" * - Neither the name of the MontaVista Software, Inc. nor the names of its
.\" * contributors may be used to endorse or promote products derived from this
.\" * software without specific prior written permission.
.\" *
.\" * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
.\" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
.\" * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" */
.TH VOTEQUORUM_TRACKSTART 3 @BUILDDATE@ "corosync Man Page" "Corosync Cluster Engine Programmer's Manual"
.SH NAME
votequorum_trackstart \- Enable callbacks notification.
.SH SYNOPSIS
.B #include <corosync/votequorum.h>
.sp
.BI "int votequorum_trackstart(votequorum_handle_t *" handle ", uint64_t " context ", unsigned int " flags ");"
.SH DESCRIPTION
The
.B votequorum_trackstart
function is used to enable callbacks notification from the votequorum API.
.PP
Every time the voting configuration changes (eg a node joins or leave the cluster)
or the quorum status change or the expected votes changes, the notification is queued.
.PP
The notification is dispatched via
.B votequorum_dispatch()
function that will execute the callback.
.PP
The
.I context
option allows one to set a tracking context.
.PP
The
.I flags
argument is defined by one or more of the following values and values can be bitwise-or'd
.nf
#define CS_TRACK_CURRENT 0x01
#define CS_TRACK_CHANGES 0x02
#define CS_TRACK_CHANGES_ONLY 0x04
.fi
.SH RETURN VALUE
This call returns the CS_OK value if successful, otherwise an error is returned.
.PP
.SH ERRORS
@COMMONIPCERRORS@
.SH "SEE ALSO"
.BR votequorum_overview (3),
.BR votequorum_initialize (3),
.BR votequorum_finalize (3),
.BR votequorum_getinfo (3),
.BR votequorum_trackstop (3),
.BR votequorum_fd_get (3),
.BR votequorum_dispatch (3),
.BR votequorum_context_set (3),
.BR votequorum_context_get (3),
.BR votequorum_setexpected (3),
.BR votequorum_setvotes (3)
.PP
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