1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1996 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD$ 30.\" 31.Dd July 24, 1996 32.Os 33.Dt VFS_SYNC 9 34.Sh NAME 35.Nm VFS_SYNC 36.Nd flush unwritten data 37.Sh SYNOPSIS 38.Fd #include <sys/param.h> 39.Fd #include <sys/mount.h> 40.Fd #include <sys/vnode.h> 41.Ft int 42.Fn VFS_SYNC "struct mount *mp" "int waitfor" "struct ucred *cred" "struct proc *p" 43.Sh DESCRIPTION 44This writes out all unwritten data in a filesystem. 45.Pp 46Its arguments are: 47.Bl -tag -width waitfor 48.It Ar mp 49The filesystem. 50.It Ar waitfor 51Whether the function should wait for I/O to complete. 52Possible values are: 53.Bl -tag -width MNT_NOWAIT 54.It Dv MNT_WAIT 55synchronously wait for I/O to complete 56.It Dv MNT_NOWAIT 57start all I/O, but do not wait for it 58.It Dv MNT_LAZY 59push data not written by filesystem syncer 60.El 61.It Ar cred 62The caller's credentials. 63.It Ar p 64The calling process. 65.El 66.Pp 67This would normally call 68.Xr VOP_FSYNC 9 69for all the vnodes in the filesystem. 70.Sh SEE ALSO 71.Xr fsync 2 , 72.Xr sync 2 , 73.Xr VFS 9 , 74.Xr vnode 9 , 75.Xr VOP_FSYNC 9 76.Sh AUTHORS 77This man page was written by 78.An Doug Rabson . 79