1.\" Copyright (c) 1996 Doug Rabson 2.\" 3.\" All rights reserved. 4.\" 5.\" This program is free software. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man9/VFS_SYNC.9,v 1.6.2.1 2001/12/17 11:30:18 ru Exp $ 28.\" $DragonFly: src/share/man/man9/VFS_SYNC.9,v 1.3 2004/06/01 11:36:53 hmp Exp $ 29.\" 30.Dd July 24, 1996 31.Os 32.Dt VFS_SYNC 9 33.Sh NAME 34.Nm VFS_SYNC 35.Nd flush unwritten data 36.Sh SYNOPSIS 37.In sys/param.h 38.In sys/mount.h 39.In sys/vnode.h 40.Ft int 41.Fn VFS_SYNC "struct mount *mp" "int waitfor" "struct ucred *cred" "struct proc *p" 42.Sh DESCRIPTION 43This writes out all unwritten data in a filesystem. 44.Pp 45Its arguments are: 46.Bl -tag -width waitfor 47.It Ar mp 48The filesystem. 49.It Ar waitfor 50Whether the function should wait for I/O to complete. 51.It Ar cred 52The caller's credentials. 53.It Ar p 54The calling process. 55.El 56.Pp 57This would normally call 58.Xr VOP_FSYNC 9 59for all the vnodes in the filesystem. 60.Sh SEE ALSO 61.Xr fsync 2 , 62.Xr sync 2 , 63.Xr VFS 9 , 64.Xr vnode 9 , 65.Xr VOP_FSYNC 9 66.Sh AUTHORS 67This man page was written by 68.An Doug Rabson . 69