89 lines
2.6 KiB
Groff
89 lines
2.6 KiB
Groff
.\"
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.\" Copyright (c) 1999 Alfred Perlstein
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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 condition
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.\" is met:
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.\" Redistributions of source code must retain the above copyright
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.\" notice, this condition and the following disclaimer.
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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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.\" $FreeBSD$
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.\"
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.Dd January 4, 2010
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.Dt VFS_CHECKEXP 9
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.Os
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.Sh NAME
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.Nm VFS_CHECKEXP
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.Nd check if a file system is exported to a client
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/mount.h
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.Ft int
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.Fn VFS_CHECKEXP "struct mount *mp" "struct sockaddr *nam" "int *exflagsp" "struct ucred **credanonp"
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.Sh DESCRIPTION
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The
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.Fn VFS_CHECKEXP
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macro is used by the NFS server to check if a mount point is exported
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to a client.
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.Pp
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The arguments it expects are:
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.Bl -tag -width credanonp
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.It Fa mp
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The mount point to be checked.
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.It Fa nam
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An mbuf containing the network address of the client.
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.It Fa exflagsp
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Return parameter for the export flags for this client.
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.It Fa 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
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.Fn VFS_CHECKEXP
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macro should be called on a file system's mount structure to determine if it
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is exported to a client whose address is contained in
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.Fa nam .
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.Pp
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It is generally called before
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.Xr VFS_FHTOVP 9
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to validate that a client has access to the file system.
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.Pp
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The file system 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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.Vt 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 file system.
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.Sh RETURN VALUES
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The export flags and anonymous credentials specific to the client (returned
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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_FHTOVP 9 ,
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.Xr vnode 9 ,
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.Xr VOP_VPTOFH 9
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.Sh AUTHORS
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This manual page was written by
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.An Alfred Perlstein .
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