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:
Fa mp
The mount point to be checked.
Fa nam
An mbuf containing the network address of the client.
Fa exflagsp
Return parameter for the export flags for this client.
Fa 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 address is contained in
Fa nam .
It is generally called before
VFS_FHTOVP9
to validate that a client has access to the file system.
The file system should call
vfs_export_lookup9
with the address of an appropriate
Vt netexport
structure and the address of the client,
Fa 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_lookup9)
will be returned in
Fa *exflagsp
and
Fa *credanonp .
