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VFS_CHECKEXP(9)	       FreeBSD Kernel Developer's Manual       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	struc-
     ture to determine if it is	exported to a client whose address is con-
     tained 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.

FreeBSD	9.2			January	7, 2005			   FreeBSD 9.2

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | AUTHORS

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