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NFSSERVCTL(2)              Linux Programmer's Manual             NFSSERVCTL(2)
NAME
       nfsservctl - syscall interface to kernel nfs daemon
SYNOPSIS
       #include <linux/nfsd/syscall.h>
       long nfsservctl(int cmd, struct nfsctl_arg *argp,
                       union nfsctl_res *resp);
DESCRIPTION
       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  It has been
       replaced by a set of files in the nfsd filesystem; see nfsd(7).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;
           };
RETURN VALUE
       On success, zero is returned.  On error, -1 is returned, and  errno  is
       set appropriately.
CONFORMING TO
       This call is Linux-specific.
COLOPHON
       This  page  is  part of release 4.15 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
       https://www.kernel.org/doc/man-pages/.
Linux                             2017-09-15                     NFSSERVCTL(2)