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nfsservctl(2) — Linux manual page

nfsservctl(2)              System Calls Manualnfsservctl(2)

NAME        top

       nfsservctl - syscall interface to kernel nfs daemon

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <linux/nfsd/syscall.h>long nfsservctl(intcmd, struct nfsctl_arg *argp,union nfsctl_res *resp);

DESCRIPTION        top

Note: Since Linux 3.1, this system call no longer exists.  It has       been replaced by a set of files in thenfsd filesystem; seenfsd(7).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(8))                                           (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        top

       On success, zero is returned.  On error, -1 is returned, anderrno       is set to indicate the error.

STANDARDS        top

       Linux.

HISTORY        top

       Removed in Linux 3.1.  Removed in glibc 2.28.

SEE ALSO        top

nfsd(7)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2024-07-23nfsservctl(2)

Pages that refer to this page:syscalls(2), capabilities(7)

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