nfsservctl(int cmd, struct nfsctl_arg *argp, union nfsctl_res *resp);
/*
 * These are the commands understood by nfsctl().
 */
#define NFSCTL_SVC              0       /* ¼¹ö ÇÁ·Î¼¼½ºÀÌ´Ù. */
#define NFSCTL_ADDCLIENT        1       /* nfs»ç¿ëÀÚ Ãß°¡. */
#define NFSCTL_DELCLIENT        2       /* nfs»ç¿ëÀÚ »èÁ¦. */
#define NFSCTL_EXPORT           3       /* ÆÄÀϽýºÅÛ export. */
#define NFSCTL_UNEXPORT         4       /* ÆÄÀϽýºÅÛ unexport. */
#define NFSCTL_UGIDUPDATE       5       /* »ç¿ëÀÚÀÇ uid/gid ¸Ê ¾÷µ¥ÀÌÆ®. */
#define NFSCTL_GETFH            6       /* get an fh (used by mountd) */
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;
};