vfs_checkexp(9)

NAME

VFS_CHECKEXP - check if a file system is exported to a

client

SYNOPSIS

#include <sys/param.h>
#include <sys/mount.h>
int
VFS_CHECKEXP(struct  mount  *mp,  struct  sockaddr *nam, int
*exflagsp,
        struct ucred **credanonp);

DESCRIPTION

The VFS_CHECKEXP() macro is used by the NFS server to check

if a mount
point is exported to a client.

The arguments it expects are:

mp The mount point to be checked.

nam An mbuf containing the network address of the

client.

exflagsp Return parameter for the export flags for this

client.

credanonp Return parameter for the anonymous credentials

for this

client.

The VFS_CHECKEXP() macro should be called on a file system's

mount structure to determine if it is exported to a client whose ad

dress is contained in nam.

It is generally called before VFS_FHTOVP(9) to validate that

a client has
access to the file system.

The file system should call vfs_export_lookup(9) with the

address of an
appropriate netexport structure and the address of the

client, nam, to
verify that the client can access this file system.

RETURN VALUES

The export flags and anonymous credentials specific to the

client
(returned by vfs_export_lookup(9)) will be returned in

*exflagsp and
*credanonp.

SEE ALSO

VFS(9), VFS_FHTOVP(9), VFS_VPTOFH(9), vnode(9)

AUTHORS

This manual page was written by Alfred Perlstein.

BSD January 7, 2005

BSD