86 lines
2.5 KiB
Groff
86 lines
2.5 KiB
Groff
.\" -*- nroff -*-
|
|
.\"
|
|
.\" Copyright (c) 1996 Doug Rabson
|
|
.\"
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This program is free software.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. 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.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``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 DEVELOPERS 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd January 7, 2005
|
|
.Os
|
|
.Dt VFS_SYNC 9
|
|
.Sh NAME
|
|
.Nm VFS_SYNC
|
|
.Nd flush unwritten data
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In sys/mount.h
|
|
.In sys/vnode.h
|
|
.Ft int
|
|
.Fn VFS_SYNC "struct mount *mp" "int waitfor" "struct ucred *cred" "struct thread *td"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn VFS_SYNC
|
|
macro writes out all unwritten data in the file system mounted as
|
|
.Fa mp .
|
|
.Pp
|
|
The arguments it expects are:
|
|
.Bl -tag -width ".Fa waitfor"
|
|
.It Fa mp
|
|
The file system.
|
|
.It Fa waitfor
|
|
Whether the function should wait for I/O to complete.
|
|
Possible values are:
|
|
.Bl -tag -width MNT_NOWAIT
|
|
.It Dv MNT_WAIT
|
|
synchronously wait for I/O to complete
|
|
.It Dv MNT_NOWAIT
|
|
start all I/O, but do not wait for it
|
|
.It Dv MNT_LAZY
|
|
push data not written by file system syncer
|
|
.El
|
|
.It Fa cred
|
|
The caller's credentials.
|
|
.It Fa td
|
|
The calling thread.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn VFS_SYNC
|
|
macro calls the
|
|
.Va vfs_sync
|
|
method of the filesystem, which normally calls
|
|
.Xr VOP_FSYNC 9
|
|
for all the vnodes in the file system.
|
|
.Sh SEE ALSO
|
|
.Xr fsync 2 ,
|
|
.Xr sync 2 ,
|
|
.Xr VFS 9 ,
|
|
.Xr vnode 9 ,
|
|
.Xr VOP_FSYNC 9
|
|
.Sh AUTHORS
|
|
This manual page was written by
|
|
.An Doug Rabson .
|