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