corosync/man/quorum_trackstart.3.in

.\"/*
.\" * 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,
.\" *   this list of conditions and the following disclaimer in the documentation
.\" *   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
.\" * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
.\" * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
.\" * THE POSSIBILITY OF SUCH DAMAGE.
.\" */
.TH QUORUM_TRACKSTART 3 @BUILDDATE@ "corosync Man Page" "Corosync Cluster Engine Programmer's Manual"
.SH NAME
quorum_trackstart \- Enable callbacks notification.
.SH SYNOPSIS
.B #include <corosync/quorum.h>
.sp
.BI "int quorum_trackstart(quorum_handle_t *" handle ", unsigned int " flags ");"
.SH DESCRIPTION
The
.B quorum_trackstart
function is used to enable callbacks notification from the quorum API.
.PP
Every time the voting configuration changes (eg a node joins or leave the cluster)
or the quorum status change, the notification is queued.
.PP
The notification is dispatched via
.B quorum_dispatch()
function that will execute the callback.
.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 quorum_overview (3),
.BR quorum_initialize (3),
.BR quorum_finalize (3),
.BR quorum_getquorate (3),
.BR quorum_trackstop (3),
.BR quorum_fd_get (3),
.BR quorum_dispatch (3),
.BR quorum_context_set (3),
.BR quorum_context_get (3)
.PP