1.\" 2.\" Copyright (c) 1999 Alfred Perlstein 3.\" 4.\" All rights reserved. 5.\" 6.\" This program is free software. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following condition 10.\" is met: 11.\" Redistributions of source code must retain the above copyright 12.\" notice, this condition and the following disclaimer. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 15.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 18.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd January 4, 2010 28.Dt VFS_CHECKEXP 9 29.Os 30.Sh NAME 31.Nm VFS_CHECKEXP 32.Nd check if a file system is exported to a client 33.Sh SYNOPSIS 34.In sys/param.h 35.In sys/mount.h 36.Ft int 37.Fn VFS_CHECKEXP "struct mount *mp" "struct sockaddr *nam" "int *exflagsp" "struct ucred **credanonp" 38.Sh DESCRIPTION 39The 40.Fn VFS_CHECKEXP 41macro is used by the NFS server to check if a mount point is exported 42to a client. 43.Pp 44The arguments it expects are: 45.Bl -tag -width credanonp 46.It Fa mp 47The mount point to be checked. 48.It Fa nam 49An mbuf containing the network address of the client. 50.It Fa exflagsp 51Return parameter for the export flags for this client. 52.It Fa credanonp 53Return parameter for the anonymous credentials for this client. 54.El 55.Pp 56The 57.Fn VFS_CHECKEXP 58macro should be called on a file system's mount structure to determine if it 59is exported to a client whose address is contained in 60.Fa nam . 61.Pp 62It is generally called before 63.Xr VFS_FHTOVP 9 64to validate that a client has access to the file system. 65.Pp 66The file system should call 67.Xr vfs_export_lookup 9 68with the address of an appropriate 69.Vt netexport 70structure and the address of the client, 71.Fa nam , 72to verify that the client can access this file system. 73.Sh RETURN VALUES 74The export flags and anonymous credentials specific to the client (returned 75by 76.Xr vfs_export_lookup 9 ) 77will be returned in 78.Fa *exflagsp 79and 80.Fa *credanonp . 81.Sh SEE ALSO 82.Xr VFS 9 , 83.Xr VFS_FHTOVP 9 , 84.Xr vnode 9 , 85.Xr VOP_VPTOFH 9 86.Sh AUTHORS 87This manual page was written by 88.An Alfred Perlstein . 89