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 September 10, 1999 28.Os 29.Dt VFS_CHECKEXP 9 30.Sh NAME 31.Nm VFS_CHECKEXP 32.Nd check if a filesystem is exported to a client 33.Sh SYNOPSIS 34.Fd #include <sys/param.h> 35.Fd #include <sys/mount.h> 36.Ft int 37.Fn VFS_CHECKEXP "struct mount *mp" "struct sockaddr *nam" "int *exflagsp" "struct ucred **credanonp" 38.Sh DESCRIPTION 39This is used by the NFS server to check if a mount point is exported 40to a client. 41.Pp 42Its arguments are: 43.Bl -tag -width credanonp 44.It Ar mp 45The mount point to be checked. 46.It Ar nam 47An mbuf containing the network address of the client. 48.It Ar exflagsp 49Return parameter for the export flags for this client. 50.It Ar credanonp 51Return parameter for the anonymous credentials for this client. 52.El 53.Pp 54This should be called on a file system's mount structure to determine if it 55is exported to a client whose address is contained in 56.Fa nam . 57.Pp 58It is generally called before 59.Xr VFS_FHTOVP 9 60to validate that a client has access to the filesystem. 61.Pp 62The filesystem should call 63.Xr vfs_export_lookup 9 64with the address of an appropriate 65.Dv netexport 66structure and the address of the client, 67.Fa nam , 68to verify that the client can access this filesystem. 69.Sh RETURN VALUES 70The export flags and anonymous credentials specific to the client (returned 71by 72.Xr vfs_export_lookup 9 ) 73will be returned in 74.Fa *exflagsp 75and 76.Fa *credanonp . 77.Sh SEE ALSO 78.Xr VFS 9 , 79.Xr VFS_FHTOVP 9 , 80.Xr VFS_VPTOFH 9 , 81.Xr vnode 9 82.Sh AUTHORS 83This man page was written by 84.An Alfred Perlstein . 85