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.9,v 1.4.2.3 2002/03/19 18:24:16 schweikh Exp $ 28.\" 29.Dd July 24, 1996 30.Dt VFS 9 31.Os 32.Sh NAME 33.Nm VFS 34.Nd kernel interface to filesystems 35.Sh DESCRIPTION 36Calls used to set or query filesystems for settings or information. 37.Pp 38Filesystems that don't implement a VFS operation should use the appropriate 39.Fa vfs_std 40function from 41.Pa sys/kern/vfs_default.c 42rather than implementing empty functions or casting to 43.Fa eopnotsupp . 44.Sh SEE ALSO 45.Xr VFS_CHECKEXP 9 , 46.Xr VFS_FHTOVP 9 , 47.Xr VFS_MOUNT 9 , 48.Xr VFS_QUOTACTL 9 , 49.Xr VFS_SET 9 , 50.Xr VFS_START 9 , 51.Xr VFS_STATFS 9 , 52.Xr VFS_SYNC 9 , 53.Xr VFS_UNMOUNT 9 , 54.Xr VFS_VGET 9 , 55.Xr VFS_VPTOFH 9 , 56.Xr vnode 9 57.Sh AUTHORS 58This man page was written by 59.An Doug Rabson . 60