LXR linux/include/linux/nfsd/syscall.h

   1/*
   2 * include/linux/nfsd/syscall.h
   3 *
   4 * This file holds all declarations for the knfsd syscall interface.
   5 *
   6 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
   7 */
   8
   9#ifndef NFSD_SYSCALL_H
  10#define NFSD_SYSCALL_H
  11
  12#include <asm/types.h>
  13#ifdef __KERNEL__
  14# include <linux/types.h>
  15# include <linux/in.h>
  16#endif 
  17#include <linux/posix_types.h>
  18#include <linux/nfsd/const.h>
  19#include <linux/nfsd/export.h>
  20#include <linux/nfsd/nfsfh.h>
  21#include <linux/nfsd/auth.h>
  22
  23/*
  24 * Version of the syscall interface
  25 */
  26#define NFSCTL_VERSION          0x0201
  27
  28/*
  29 * These are the commands understood by nfsctl().
  30 */
  31#define NFSCTL_SVC              0       /* This is a server process. */
  32#define NFSCTL_ADDCLIENT        1       /* Add an NFS client. */
  33#define NFSCTL_DELCLIENT        2       /* Remove an NFS client. */
  34#define NFSCTL_EXPORT           3       /* export a file system. */
  35#define NFSCTL_UNEXPORT         4       /* unexport a file system. */
  36/*#define NFSCTL_UGIDUPDATE     5       / * update a client's uid/gid map. DISCARDED */
  37/*#define NFSCTL_GETFH          6       / * get an fh by ino DISCARDED */
  38#define NFSCTL_GETFD            7       /* get an fh by path (used by mountd) */
  39#define NFSCTL_GETFS            8       /* get an fh by path with max FH len */
  40
  41/* SVC */
  42struct nfsctl_svc {
  43        unsigned short          svc_port;
  44        int                     svc_nthreads;
  45};
  46
  47/* ADDCLIENT/DELCLIENT */
  48struct nfsctl_client {
  49        char                    cl_ident[NFSCLNT_IDMAX+1];
  50        int                     cl_naddr;
  51        struct in_addr          cl_addrlist[NFSCLNT_ADDRMAX];
  52        int                     cl_fhkeytype;
  53        int                     cl_fhkeylen;
  54        unsigned char           cl_fhkey[NFSCLNT_KEYMAX];
  55};
  56
  57/* EXPORT/UNEXPORT */
  58struct nfsctl_export {
  59        char                    ex_client[NFSCLNT_IDMAX+1];
  60        char                    ex_path[NFS_MAXPATHLEN+1];
  61        __kernel_old_dev_t      ex_dev;
  62        __kernel_ino_t          ex_ino;
  63        int                     ex_flags;
  64        __kernel_uid_t          ex_anon_uid;
  65        __kernel_gid_t          ex_anon_gid;
  66};
  67
  68/* GETFD */
  69struct nfsctl_fdparm {
  70        struct sockaddr         gd_addr;
  71        char                    gd_path[NFS_MAXPATHLEN+1];
  72        int                     gd_version;
  73};
  74
  75/* GETFS - GET Filehandle with Size */
  76struct nfsctl_fsparm {
  77        struct sockaddr         gd_addr;
  78        char                    gd_path[NFS_MAXPATHLEN+1];
  79        int                     gd_maxlen;
  80};
  81
  82/*
  83 * This is the argument union.
  84 */
  85struct nfsctl_arg {
  86        int                     ca_version;     /* safeguard */
  87        union {
  88                struct nfsctl_svc       u_svc;
  89                struct nfsctl_client    u_client;
  90                struct nfsctl_export    u_export;
  91                struct nfsctl_fdparm    u_getfd;
  92                struct nfsctl_fsparm    u_getfs;
  93                /*
  94                 * The following dummy member is needed to preserve binary compatibility
  95                 * on platforms where alignof(void*)>alignof(int).  It's needed because
  96                 * this union used to contain a member (u_umap) which contained a
  97                 * pointer.
  98                 */
  99                void *u_ptr;
 100        } u;
 101#define ca_svc          u.u_svc
 102#define ca_client       u.u_client
 103#define ca_export       u.u_export
 104#define ca_getfd        u.u_getfd
 105#define ca_getfs        u.u_getfs
 106};
 107
 108union nfsctl_res {
 109        __u8                    cr_getfh[NFS_FHSIZE];
 110        struct knfsd_fh         cr_getfs;
 111};
 112
 113#ifdef __KERNEL__
 114/*
 115 * Kernel syscall implementation.
 116 */
 117extern int              exp_addclient(struct nfsctl_client *ncp);
 118extern int              exp_delclient(struct nfsctl_client *ncp);
 119extern int              exp_export(struct nfsctl_export *nxp);
 120extern int              exp_unexport(struct nfsctl_export *nxp);
 121
 122#endif /* __KERNEL__ */
 123
 124#endif /* NFSD_SYSCALL_H */
 125