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NFSSERVCTL(2)		   Linux Programmer's Manual		 NFSSERVCTL(2)

       nfsservctl - syscall interface to kernel nfs daemon

       #include <linux/nfsd/syscall.h>

       long nfsservctl(int cmd, struct nfsctl_arg *argp,
		       union nfsctl_res *resp);

       Note:  Since Linux 3.1, this system call no longer exists.  It has been
       replaced by a set of files in the nfsd filesystem; see nfsd(7).

	* These are the commands understood by nfsctl().
       #define NFSCTL_SVC	   0	/* This is a server process. */
       #define NFSCTL_ADDCLIENT	   1	/* Add an NFS client. */
       #define NFSCTL_DELCLIENT	   2	/* Remove an NFS client. */
       #define NFSCTL_EXPORT	   3	/* Export a filesystem. */
       #define NFSCTL_UNEXPORT	   4	/* Unexport a filesystem. */
       #define NFSCTL_UGIDUPDATE   5	/* Update a client's UID/GID map
					   (only in Linux 2.4.x and earlier). */
       #define NFSCTL_GETFH	   6	/* Get a file handle (used by mountd)
					   (only in Linux 2.4.x and earlier). */

       struct nfsctl_arg {
	   int			     ca_version;     /* safeguard */
	   union {
	       struct nfsctl_svc     u_svc;
	       struct nfsctl_client  u_client;
	       struct nfsctl_export  u_export;
	       struct nfsctl_uidmap  u_umap;
	       struct nfsctl_fhparm  u_getfh;
	       unsigned int	     u_debug;
	   } u;

       union nfsctl_res {
	       struct knfs_fh	       cr_getfh;
	       unsigned int	       cr_debug;

       On success, zero is returned.  On error, -1 is returned, and  errno  is
       set appropriately.

       This call is Linux-specific.

       This  page  is  part of release 4.10 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest	  version     of     this    page,    can    be	   found    at

Linux				  2016-12-12			 NFSSERVCTL(2)