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: src/share/man/man9/VFS_CHECKEXP.9,v 1.2.2.4 2001/12/17 11:30:18 ru Exp $ 26.\" $DragonFly: src/share/man/man9/VFS_CHECKEXP.9,v 1.3 2003/07/27 05:36:06 hmp Exp $ 27.\" 28.Dd September 10, 1999 29.Os 30.Dt VFS_CHECKEXP 9 31.Sh NAME 32.Nm VFS_CHECKEXP 33.Nd check if vnode is exported to a client 34.Sh SYNOPSIS 35.In sys/param.h 36.In sys/mount.h 37.Ft int 38.Fn VFS_CHECKEXP "struct mount *mp" "struct mbuf *nam" "int *exflagsp" "struct ucred **credanonp" 39.Sh DESCRIPTION 40This is used by the NFS server to check if a mount point is exported 41to a client. 42.Pp 43Its arguments are: 44.Bl -tag -width credanonp 45.It Fa mp 46The mount point to be checked. 47.It Fa nam 48An mbuf containing the network address of the client. 49.It Fa exflagsp 50Return parameter for the export flags for this client. 51.It Fa credanonp 52Return parameter for the anonymous credentials for this client. 53.El 54.Pp 55This should be called on a file system's mount structure to determine if it 56is exported to a client whose address is contained in 57.Fa nam . 58.Pp 59It is generally called before 60.Xr VFS_FHTOVP 9 61to validate that a client has access to the filesystem. 62.Pp 63The filesystem should call 64.Xr vfs_export_lookup 9 65with the address of an appropriate 66.Vt netexport 67structure and the address of the client, 68.Fa nam , 69to verify that the client can access this filesystem. 70.Sh RETURN VALUES 71The export flags and anonymous credentials specific to the client (returned 72by 73.Xr vfs_export_lookup 9 ) 74will be returned in 75.Fa *exflagsp 76and 77.Fa *credanonp . 78.Sh SEE ALSO 79.Xr VFS 9 , 80.Xr VFS_FHTOVP 9 , 81.Xr VFS_VPTOFH 9 , 82.Xr vnode 9 83.Sh AUTHORS 84This man page was written by 85.An Alfred Perlstein . 86