'\" t
.\"     Title: jbd2_journal_get_write_access
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: July 2017
.\"    Manual: The Linux Journalling API
.\"    Source: Kernel Hackers Manual 4.12.2
.\"  Language: English
.\"
.TH "JBD2_JOURNAL_GET_WRI" "9" "July 2017" "Kernel Hackers Manual 4\&.12\&" "The Linux Journalling API"
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.SH "NAME"
jbd2_journal_get_write_access \- notify intent to modify a buffer for metadata (not data) update\&.
.SH "SYNOPSIS"
.HP \w'int\ jbd2_journal_get_write_access('u
.BI "int jbd2_journal_get_write_access(handle_t\ *\ " "handle" ", struct\ buffer_head\ *\ " "bh" ");"
.SH "ARGUMENTS"
.PP
\fIhandle_t * handle\fR
.RS 4
transaction to add buffer modifications to
.RE
.PP
\fIstruct buffer_head * bh\fR
.RS 4
bh to be used for metadata writes
.RE
.SH "DESCRIPTION"
.PP
Returns an error code or 0 on success\&.
.PP
In full data journalling mode the buffer may be of type BJ_AsyncData, because we\*(Aqre
\fBwrite\fRing a buffer which is also part of a shared mapping\&.
.SH "AUTHORS"
.PP
\fBRoger Gammans\fR <\&rgammans@computer-surgery.co.uk\&>
.RS 4
Author.
.RE
.PP
\fBStephen Tweedie\fR <\&sct@redhat.com\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br