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