'\" t
.\"     Title: jbd2_journal_dirty_metadata
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: The Linux Journalling API
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "JBD2_JOURNAL_DIRTY_M" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "The Linux Journalling API"
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.SH "NAME"
jbd2_journal_dirty_metadata \- mark a buffer as containing dirty metadata
.SH "SYNOPSIS"
.HP \w'int\ jbd2_journal_dirty_metadata('u
.BI "int jbd2_journal_dirty_metadata(handle_t\ *\ " "handle" ", struct\ buffer_head\ *\ " "bh" ");"
.SH "ARGUMENTS"
.PP
\fIhandle\fR
.RS 4
transaction to add buffer to\&.
.RE
.PP
\fIbh\fR
.RS 4
buffer to mark
.RE
.SH "DESCRIPTION"
.PP
mark dirty metadata which needs to be journaled as part of the current transaction\&.
.PP
The buffer must have previously had
\fBjbd2_journal_get_write_access\fR
called so that it has a valid journal_head attached to the buffer head\&.
.PP
The buffer is placed on the transaction\*(Aqs metadata list and is marked as belonging to the transaction\&.
.PP
Returns error number or 0 on success\&.
.PP
Special care needs to be taken if the buffer already belongs to the current committing transaction (in which case we should have frozen data present for that commit)\&. In that case, we don\*(Aqt relink the buffer: that only gets done when the old transaction finally completes its commit\&.
.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