1NFSSERVCTL(2)              Linux Programmer's Manual             NFSSERVCTL(2)
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NAME

6       nfsservctl - syscall interface to kernel nfs daemon
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SYNOPSIS

9       #include <linux/nfsd/syscall.h>
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11       long nfsservctl(int cmd, struct nfsctl_arg *argp,
12                       union nfsctl_res *resp);
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DESCRIPTION

15       Note:  Since Linux 3.1, this system call no longer exists.  It has been
16       replaced by a set of files in the nfsd filesystem; see nfsd(7).
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18           /*
19            * These are the commands understood by nfsctl().
20            */
21           #define NFSCTL_SVC        0  /* This is a server process. */
22           #define NFSCTL_ADDCLIENT  1  /* Add an NFS client. */
23           #define NFSCTL_DELCLIENT  2  /* Remove an NFS client. */
24           #define NFSCTL_EXPORT     3  /* Export a filesystem. */
25           #define NFSCTL_UNEXPORT   4  /* Unexport a filesystem. */
26           #define NFSCTL_UGIDUPDATE 5  /* Update a client's UID/GID map
27                                           (only in Linux 2.4.x and earlier). */
28           #define NFSCTL_GETFH      6  /* Get a file handle (used by mountd)
29                                           (only in Linux 2.4.x and earlier). */
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31           struct nfsctl_arg {
32               int                       ca_version;     /* safeguard */
33               union {
34                   struct nfsctl_svc     u_svc;
35                   struct nfsctl_client  u_client;
36                   struct nfsctl_export  u_export;
37                   struct nfsctl_uidmap  u_umap;
38                   struct nfsctl_fhparm  u_getfh;
39                   unsigned int          u_debug;
40               } u;
41           }
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43           union nfsctl_res {
44                   struct knfs_fh          cr_getfh;
45                   unsigned int            cr_debug;
46           };
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RETURN VALUE

49       On success, zero is returned.  On error, -1 is returned, and  errno  is
50       set appropriately.
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CONFORMING TO

53       This call is Linux-specific.
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COLOPHON

56       This  page  is  part of release 4.15 of the Linux man-pages project.  A
57       description of the project, information about reporting bugs,  and  the
58       latest     version     of     this    page,    can    be    found    at
59       https://www.kernel.org/doc/man-pages/.
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63Linux                             2017-09-15                     NFSSERVCTL(2)
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