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 August 26, 2006 32.Os 33.Dt VFS_ROOT 9 34.Sh NAME 35.Nm VFS_ROOT 36.Nd return the root vnode of a file system 37.Sh SYNOPSIS 38.In sys/param.h 39.In sys/mount.h 40.In sys/vnode.h 41.Ft int 42.Fn VFS_ROOT "struct mount *mp" "int flags" "struct vnode **vpp" "struct thread *td" 43.Sh DESCRIPTION 44Return a locked vnode for the root directory of the file system. 45.Pp 46Its arguments are: 47.Bl -tag -width flags 48.It Fa mp 49The file system. 50.It Fa flags 51The lock type. 52Could be 53.Dv LK_EXCLUSIVE 54or 55.Dv LK_SHARED . 56File system is free to ignore the 57.Fa flags 58argument and instead acquire an exclusive lock. 59.It Fa vpp 60Return parameter for the root vnode. 61.It Fa td 62The calling thread. 63.El 64.Sh SEE ALSO 65.Xr VFS 9 , 66.Xr vnode 9 67.Sh AUTHORS 68This manual page was written by 69.An Doug Rabson . 70