1*d874cce4Sray.\" $OpenBSD: vfs.9,v 1.4 2008/06/26 05:42:08 ray Exp $ 2f383f976Smickey.\" $NetBSD: vfs.9,v 1.7 2003/02/25 10:35:34 wiz Exp $ 3f383f976Smickey.\" 4f383f976Smickey.\" Copyright (c) 2001 The NetBSD Foundation, Inc. 5f383f976Smickey.\" All rights reserved. 6f383f976Smickey.\" 7f383f976Smickey.\" This code is derived from software contributed to The NetBSD Foundation 8f383f976Smickey.\" by Gregory McGarry. 9f383f976Smickey.\" 10f383f976Smickey.\" Redistribution and use in source and binary forms, with or without 11f383f976Smickey.\" modification, are permitted provided that the following conditions 12f383f976Smickey.\" are met: 13f383f976Smickey.\" 1. Redistributions of source code must retain the above copyright 14f383f976Smickey.\" notice, this list of conditions and the following disclaimer. 15f383f976Smickey.\" 2. Redistributions in binary form must reproduce the above copyright 16f383f976Smickey.\" notice, this list of conditions and the following disclaimer in the 17f383f976Smickey.\" documentation and/or other materials provided with the distribution. 18f383f976Smickey.\" 19f383f976Smickey.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20f383f976Smickey.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21f383f976Smickey.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22f383f976Smickey.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23f383f976Smickey.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24f383f976Smickey.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25f383f976Smickey.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26f383f976Smickey.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27f383f976Smickey.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28f383f976Smickey.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29f383f976Smickey.\" POSSIBILITY OF SUCH DAMAGE. 30f383f976Smickey.\" 31*d874cce4Sray.Dd $Mdocdate: June 26 2008 $ 32f383f976Smickey.Dt VFS 9 33f383f976Smickey.Os 34f383f976Smickey.Sh NAME 35f383f976Smickey.Nm vfs 36f383f976Smickey.Nd kernel interface to file systems 37f383f976Smickey.Sh DESCRIPTION 38f383f976SmickeyThe virtual file system, 39f383f976Smickey.Nm VFS , 40f383f976Smickeyis the kernel interface to file systems. 41f383f976SmickeyThe interface specifies the calls for the kernel to access file systems. 42f383f976SmickeyIt also specifies the core functionality that a file system must provide 43f383f976Smickeyto the kernel. 44f383f976Smickey.Pp 45f383f976SmickeyThe focus of 46f383f976Smickey.Nm 47f383f976Smickeyactivity is the 48f383f976Smickey.Em vnode 49f383f976Smickeyand is discussed in 50f383f976Smickey.Xr vnode 9 . 51f383f976Smickey.\" File system operations such as mounting and syncing are discussed in 52f383f976Smickey.\" .Xr vfsops 9 . 53f383f976Smickey.Sh SEE ALSO 54f383f976Smickey.Xr intro 9 , 55f383f976Smickey.\" .Xr vfsops 9 , 56f383f976Smickey.Xr vnode 9 , 574f22691cSderaadt.Xr VOP_LOOKUP 9 58