Document VFS changes:

VFS_CHECKEXP.9, now used to check export credentials
VFS_FHTOVP.9, only used for filehandle to vnode, no access checks are done.
VFS.9, inform people of the vfs_std* functions available to avoid
       ugly casts to eopnotsup and making of dummy functions to return 0.

1 files changed, 94 insertions, 0 deletions

diff --git a/share/man/man9/VFS_CHECKEXP.9 b/share/man/man9/VFS_CHECKEXP.9
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+.\" -*- nroff -*-
+.\"
+.\" Copyright (c) 1996 Doug Rabson
+.\"
+.\" All rights reserved.
+.\"
+.\" This program is free software.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.\" $Id: VFS_FHTOVP.9,v 1.4 1998/08/03 17:29:44 bde Exp $
+.\" $FreeBSD$
+.\"
+.Dd July 24, 1996
+.Os
+.Dt VFS_CHECKEXP 9
+.Sh NAME
+.Nm VFS_CHECKEXP
+.Nd check if vnode is exported to a client
+.Sh SYNOPSIS
+.Fd #include <sys/param.h>
+.Fd #include <sys/mount.h>
+.Fd #include <sys/vnode.h>
+.Ft int
+.Fn VFS_CHECKEXP "struct mount *mp" "struct mbuf  *nam" "int *exflagsp" "struct ucred **credanonp"
+.Sh DESCRIPTION
+This is used by the NFS server to check if a vnode is exported to a client.
+.Pp
+Its arguments are:
+.Bl -tag -width credanonp
+.It Ar mp
+The mount point to be checked.
+.It Ar nam
+An mbuf containing the network address of the client.
+.It Ar exflagsp
+Return parameter for the export flags for this client.
+.It Ar credanonp
+Return parameter for the anonymous credentials for this client.
+.El
+.Pp
+This should be called on a file system's mount structure to determine if it 
+is exported to a client whos address is contained in 
+.Fa nam .
+.Pp
+It is generally called before
+.Xr VFS_FHTOVP 9
+to validate that a client has access to the filesystem.
+.Pp
+The filesystem should call
+.Xr vfs_export_lookup 9
+with the address of an appropriate
+.Dv netexport 
+structure and the address of the client,
+.Fa nam ,
+to verify that the client can access this filesystem.
+.Pp
+.Sh RETURN VALUES
+The export flags and anonymous credentials specific to the client
+will be returned in
+.Fa *exflagsp
+and
+.Fa *credanonp .
+.Sh SEE ALSO
+.Xr VFS 9 ,
+.Xr VFS_FHTOVP 9 ,
+.Xr VFS_VPTOFH 9 ,
+.Xr vnode 9
+.Sh AUTHORS
+This man page was written by
+.An Doug Rabson ,
+for 
+.Xr VFS_FHTOVP 9
+and modified for 
+.Xr VFS_CHECKEXP 9
+by
+.An Alfred Perlstein .