'\" t
.\"     Title: typedef handle_t
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: March 2017
.\"    Manual: The Linux Journalling API
.\"    Source: Kernel Hackers Manual
.\"  Language: English
.\"
.TH "TYPEDEF HANDLE_T" "9" "March 2017" "Kernel Hackers Manual" "The Linux Journalling API"
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.SH "NAME"
typedef_handle_t \- The handle_t type represents a single atomic update being performed by some process\&.
.SH "SYNOPSIS"
.sp
.nf
typedef handle_t;
.fi
.SH "DESCRIPTION"
.PP
.PP
All filesystem modifications made by the process go through this handle\&. Recursive operations (such as quota operations) are gathered into a single update\&.
.PP
The buffer credits field is used to account for journaled buffers being modified by the running process\&. To ensure that there is enough log space for all outstanding operations, we need to limit the number of outstanding buffers possible at any time\&. When the operation completes, any buffer credits not used are credited back to the transaction, so that at all times we know how many buffers the outstanding updates on a transaction might possibly touch\&.
.PP
This is an opaque datatype\&.
.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