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/config.h>
  15 # include <linux/types.h>
  16 # include <linux/in.h>
  17 #endif
  18 #include <linux/posix_types.h>
  19 #include <linux/nfsd/const.h>
  20 #include <linux/nfsd/export.h>
  21 #include <linux/nfsd/nfsfh.h>
  22 #include <linux/nfsd/auth.h>
  23
  24 /*
  25  * Version of the syscall interface
  26  */
  27 #define NFSCTL_VERSION          0x0201
  28
  29 /*
  30  * These are the commands understood by nfsctl().
  31  */
  32 #define NFSCTL_SVC              0       /* This is a server process. */
  33 #define NFSCTL_ADDCLIENT        1       /* Add an NFS client. */
  34 #define NFSCTL_DELCLIENT        2       /* Remove an NFS client. */
  35 #define NFSCTL_EXPORT           3       /* export a file system. */
  36 #define NFSCTL_UNEXPORT         4       /* unexport a file system. */
  37 #define NFSCTL_UGIDUPDATE       5       /* update a client's uid/gid map. */
  38 #define NFSCTL_GETFH            6       /* get an fh by ino (used by mountd) */
  39 #define NFSCTL_GETFD            7       /* get an fh by path (used by mountd) */
  40 #define NFSCTL_GETFS            8       /* get an fh by path with max FH len */
  41
  42 /* SVC */
  43 struct nfsctl_svc {
  44         unsigned short          svc_port;
  45         int                     svc_nthreads;
  46 };
  47
  48 /* ADDCLIENT/DELCLIENT */
  49 struct nfsctl_client {
  50         char                    cl_ident[NFSCLNT_IDMAX+1];
  51         int                     cl_naddr;
  52         struct in_addr          cl_addrlist[NFSCLNT_ADDRMAX];
  53         int                     cl_fhkeytype;
  54         int                     cl_fhkeylen;
  55         unsigned char           cl_fhkey[NFSCLNT_KEYMAX];
  56 };
  57
  58 /* EXPORT/UNEXPORT */
  59 struct nfsctl_export {
  60         char                    ex_client[NFSCLNT_IDMAX+1];
  61         char                    ex_path[NFS_MAXPATHLEN+1];
  62         __kernel_dev_t          ex_dev;
  63         __kernel_ino_t          ex_ino;
  64         int                     ex_flags;
  65         __kernel_uid_t          ex_anon_uid;
  66         __kernel_gid_t          ex_anon_gid;
  67 };
  68
  69 /* UGIDUPDATE */
  70 struct nfsctl_uidmap {
  71         char *                  ug_ident;
  72         __kernel_uid_t          ug_uidbase;
  73         int                     ug_uidlen;
  74         __kernel_uid_t *        ug_udimap;
  75         __kernel_gid_t          ug_gidbase;
  76         int                     ug_gidlen;
  77         __kernel_gid_t *        ug_gdimap;
  78 };
  79
  80 /* GETFH */
  81 struct nfsctl_fhparm {
  82         struct sockaddr         gf_addr;
  83         __kernel_dev_t          gf_dev;
  84         __kernel_ino_t          gf_ino;
  85         int                     gf_version;
  86 };
  87
  88 /* GETFD */
  89 struct nfsctl_fdparm {
  90         struct sockaddr         gd_addr;
  91         char                    gd_path[NFS_MAXPATHLEN+1];
  92         int                     gd_version;
  93 };
  94
  95 /* GETFS - GET Filehandle with Size */
  96 struct nfsctl_fsparm {
  97         struct sockaddr         gd_addr;
  98         char                    gd_path[NFS_MAXPATHLEN+1];
  99         int                     gd_maxlen;
 100 };
 101
 102 /*
 103  * This is the argument union.
 104  */
 105 struct nfsctl_arg {
 106         int                     ca_version;     /* safeguard */
 107         union {
 108                 struct nfsctl_svc       u_svc;
 109                 struct nfsctl_client    u_client;
 110                 struct nfsctl_export    u_export;
 111                 struct nfsctl_uidmap    u_umap;
 112                 struct nfsctl_fhparm    u_getfh;
 113                 struct nfsctl_fdparm    u_getfd;
 114                 struct nfsctl_fsparm    u_getfs;
 115         } u;
 116 #define ca_svc          u.u_svc
 117 #define ca_client       u.u_client
 118 #define ca_export       u.u_export
 119 #define ca_umap         u.u_umap
 120 #define ca_getfh        u.u_getfh
 121 #define ca_getfd        u.u_getfd
 122 #define ca_getfs        u.u_getfs
 123 #define ca_authd        u.u_authd
 124 };
 125
 126 union nfsctl_res {
 127         __u8                    cr_getfh[NFS_FHSIZE];
 128         struct knfsd_fh         cr_getfs;
 129 };
 130
 131 #ifdef __KERNEL__
 132 /*
 133  * Kernel syscall implementation.
 134  */
 135 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
 136 extern asmlinkage long  sys_nfsservctl(int, void *, void *);
 137 #else
 138 #define sys_nfsservctl          sys_ni_syscall
 139 #endif
 140 extern int              exp_addclient(struct nfsctl_client *ncp);
 141 extern int              exp_delclient(struct nfsctl_client *ncp);
 142 extern int              exp_export(struct nfsctl_export *nxp);
 143 extern int              exp_unexport(struct nfsctl_export *nxp);
 144
 145 #endif /* __KERNEL__ */
 146
 147 #endif /* NFSD_SYSCALL_H */