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.Dd May 23, 2009 30.Dt VFS_SYNC 9 31.Os 32.Sh NAME 33.Nm VFS_SYNC 34.Nd flush unwritten data 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/mount.h 38.In sys/vnode.h 39.Ft int 40.Fn VFS_SYNC "struct mount *mp" "int waitfor" 41.Sh DESCRIPTION 42The 43.Fn VFS_SYNC 44macro writes out all unwritten data in the file system mounted as 45.Fa mp . 46.Pp 47The arguments it expects are: 48.Bl -tag -width ".Fa waitfor" 49.It Fa mp 50The file system. 51.It Fa waitfor 52Whether the function should wait for I/O to complete. 53Possible values are: 54.Bl -tag -width MNT_NOWAIT 55.It Dv MNT_WAIT 56synchronously wait for I/O to complete 57.It Dv MNT_NOWAIT 58start all I/O, but do not wait for it 59.It Dv MNT_LAZY 60push data not written by file system syncer 61.El 62.El 63.Pp 64The 65.Fn VFS_SYNC 66macro calls the 67.Va vfs_sync 68method of the file system, which normally calls 69.Xr VOP_FSYNC 9 70for all the vnodes in the file system. 71.Sh SEE ALSO 72.Xr fsync 2 , 73.Xr sync 2 , 74.Xr VFS 9 , 75.Xr vnode 9 , 76.Xr VOP_FSYNC 9 77.Sh AUTHORS 78This manual page was written by 79.An Doug Rabson . 80