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 February 9, 2010 32.Dt VFS 9 33.Os 34.Sh NAME 35.Nm VFS 36.Nd kernel interface to file systems 37.Sh DESCRIPTION 38Calls used to set or query file systems for settings or information. 39.Pp 40File systems that do not implement a VFS operation should use the appropriate 41.Fa vfs_std 42function from 43.Pa src/sys/kern/vfs_default.c 44rather than implementing empty functions or casting to 45.Fa eopnotsupp . 46.Sh SEE ALSO 47.Xr VFS_CHECKEXP 9 , 48.Xr VFS_FHTOVP 9 , 49.Xr VFS_INIT 9 , 50.Xr VFS_MOUNT 9 , 51.Xr VFS_QUOTACTL 9 , 52.Xr VFS_SET 9 , 53.Xr VFS_STATFS 9 , 54.Xr VFS_SYNC 9 , 55.Xr VFS_UNMOUNT 9 , 56.Xr VFS_VGET 9 , 57.Xr vnode 9 , 58.Xr VOP_VPTOFH 9 59.Sh AUTHORS 60This manual page was written by 61.An Doug Rabson . 62