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.TH "JOURNAL_CALLBACK_SET" "9" "09 April 2004" "" ""

.SH NAME
journal_callback_set \- Register a callback function for this handle.
.SH SYNOPSIS
.sp
\fB
.sp
void journal_callback_set  (handle_t * \fIhandle\fB, void (*\fIfunc\fB)
struct journal_callback *jcb, int error, struct journal_callback * \fIjcb\fB);
\fR
.SH "ARGUMENTS"
.TP
\fB\fIhandle\fB\fR
handle to attach the callback to.
.TP
\fB\fIfunc\fB\fR
function to callback.
.TP
\fB\fIjcb\fB\fR
structure with additional information required by \fBfunc\fR , and
some space for jbd internal information.
.SH "DESCRIPTION"
.PP
The function will be
called when the transaction that this handle is part of has been
committed to disk with the original callback data struct and the
error status of the journal as parameters.  There is no guarantee of
ordering between handles within a single transaction, nor between
callbacks registered on the same handle.
.PP
The caller is responsible for allocating the journal_callback struct.
This is to allow the caller to add as much extra data to the callback
as needed, but reduce the overhead of multiple allocations.  The caller
allocated struct must start with a struct journal_callback at offset 0,
and has the caller-specific data afterwards.
.SH "ABOUT THIS DOCUMENT"
.PP
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later
version.
.PP
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
.PP
For more details see the file COPYING in the source
distribution of Linux.
.PP
If you have comments on the formatting of this manpage, then please contact
Michael Still (mikal@stillhq.com).
.PP
This documentation was generated with kernel version 2.6.0.