94 lines
3.2 KiB
Groff
94 lines
3.2 KiB
Groff
.\" -*- nroff -*-
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.\"
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.\" Copyright (c) 1996 Doug Rabson
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.\"
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.\" All rights reserved.
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.\"
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.\" This program is free software.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $Id: VFS_FHTOVP.9,v 1.3 1998/03/12 07:31:04 charnier Exp $
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.\"
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.Dd July 24, 1996
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.Os
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.Dt VFS_FHTOVP 9
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.Sh NAME
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.Nm VFS_FHTOVP
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.Nd turn an NFS filehandle into a vnode
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.Sh SYNOPSIS
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.Fd #include <sys/param.h>
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.Fd #include <sys/mount.h>
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.Fd #include <sys/vnode.h>
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.Ft int
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.Fn VFS_FHTOVP "struct mount *mp" "struct fid *fhp" "struct mbuf *nam" "struct vnode **vpp" "int *exflagsp" "struct ucred **credanonp"
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.Sh DESCRIPTION
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This is used by the NFS server to turn an NFS filehandle into a vnode.
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.Pp
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Its arguments are:
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.Bl -tag -width credanonp
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.It Ar mp
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The filesystem.
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.It Ar fhp
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The filehandle to convert.
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.It Ar nam
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An mbuf containing the network address of the client.
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.It Ar vpp
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Return parameter for the new locked vnode.
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.It Ar exflagsp
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Return parameter for the export flags for this client.
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.It Ar credanonp
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Return parameter for the anonymous credentials for this client.
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.El
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.Pp
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The contents of the filehandle are defined by the filesystem and are
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not examined by any other part of the system. It should contain
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enough information to uniquely identify a file within the filesystem
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as well as noticing when a file has been removed and the filesystem
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resources have been reused for a new file. For instance, UFS
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filesystem stores the inode number and inode generation counter in its
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filehandle.
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.Pp
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The filesystem should call
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.Xr vfs_export_lookup 9
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with the address of an appropriate
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.Dv netexport
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structure and the address of the client,
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.Fa nam ,
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to verify that the client can access this filesystem.
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.Sh RETURN VALUES
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The locked vnode for the file will be returned in
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.Fa *vpp .
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The export flags and anonymous credentials specific to the client
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(returned by
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.Xr vfs_export_lookup 9 )
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will be returned in
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.Fa *exflagsp
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and
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.Fa *credanonp .
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.Sh SEE ALSO
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.Xr VFS 9 ,
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.Xr VFS_VPTOFH 9 ,
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.Xr vnode 9
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.Sh AUTHORS
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This man page was written by
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.An Doug Rabson .
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