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/VOP_FSYNC.9,v 1.6.2.2 2001/12/17 11:30:18 ru Exp $ 28.\" 29.Dd October 8, 2014 30.Dt VOP_FSYNC 9 31.Os 32.Sh NAME 33.Nm VOP_FSYNC 34.Nd flush filesystem buffers for a file 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/vnode.h 38.Ft int 39.Fn VOP_FSYNC "struct vnode *vp" "int waitfor" "int flags" 40.Sh DESCRIPTION 41This call flushes any dirty filesystem buffers for the file. 42It is used to implement the 43.Xr sync 2 44and 45.Xr fsync 2 46system calls. 47.Pp 48Its arguments are: 49.Bl -tag -width waitfor 50.It Ar vp 51the vnode of the file. 52.It Ar waitfor 53whether the function should do data, meta-data updates or be full-synchronous. 54.It Ar flags 55are additional flags to be passed to the filesystem specific 56.Xr fsync 2 57function. 58.El 59.Pp 60The argument 61.Fa waitfor 62can use the following flags: 63.Bl -tag -width ".Dv MNT_NOWAIT" 64.It Dv MNT_NOWAIT 65is for an asychronous data pass and a meta-data pass as well. 66.It Dv MNT_LAZY 67means a limited amount of data from dirty buffers and a full meta-data synchronization pass. 68.It Dv MNT_WAIT 69will make 70.Xr syncer 4 71try to do a full synchronization pass. 72That is, a meta-data pass and multiple data passes. 73.El 74.Pp 75The argument 76.Fa flags 77is to specify additional flags passed to the filesystem specific 78.Xr fsync 2 79call. 80The only supported flag at the moment is 81.Dv VOP_FSYNC_SYSCALL 82which indicates the file synchronization was requested from userland. 83.Sh RETURN VALUES 84Zero is returned if the call is successful, otherwise an appropriate 85error code is returned. 86.Sh ERRORS 87.Bl -tag -width Er 88.It Bq Er ENOSPC 89The filesystem is full. 90.It Bq Er EDQUOT 91Quota exceeded. 92.El 93.Sh SEE ALSO 94.Xr syncer 4 , 95.Xr vnode 9 96.Sh AUTHORS 97This man page was written by 98.An Doug Rabson . 99