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. DISCARDED */
  38 /*#define NFSCTL_GETFH          6       / * get an fh by ino DISCARDED */
  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_old_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 /* GETFD */
  70 struct nfsctl_fdparm {
  71         struct sockaddr         gd_addr;
  72         char                    gd_path[NFS_MAXPATHLEN+1];
  73         int                     gd_version;
  74 };
  75
  76 /* GETFS - GET Filehandle with Size */
  77 struct nfsctl_fsparm {
  78         struct sockaddr         gd_addr;
  79         char                    gd_path[NFS_MAXPATHLEN+1];
  80         int                     gd_maxlen;
  81 };
  82
  83 /*
  84  * This is the argument union.
  85  */
  86 struct nfsctl_arg {
  87         int                     ca_version;     /* safeguard */
  88         union {
  89                 struct nfsctl_svc       u_svc;
  90                 struct nfsctl_client    u_client;
  91                 struct nfsctl_export    u_export;
  92                 struct nfsctl_fdparm    u_getfd;
  93                 struct nfsctl_fsparm    u_getfs;
  94                 /*
  95                  * The following dummy member is needed to preserve binary compatibility
  96                  * on platforms where alignof(void*)>alignof(int).  It's needed because
  97                  * this union used to contain a member (u_umap) which contained a
  98                  * pointer.
  99                  */
 100                 void *u_ptr;
 101         } u;
 102 #define ca_svc          u.u_svc
 103 #define ca_client       u.u_client
 104 #define ca_export       u.u_export
 105 #define ca_getfd        u.u_getfd
 106 #define ca_getfs        u.u_getfs
 107 };
 108
 109 union nfsctl_res {
 110         __u8                    cr_getfh[NFS_FHSIZE];
 111         struct knfsd_fh         cr_getfs;
 112 };
 113
 114 #ifdef __KERNEL__
 115 /*
 116  * Kernel syscall implementation.
 117  */
 118 extern int              exp_addclient(struct nfsctl_client *ncp);
 119 extern int              exp_delclient(struct nfsctl_client *ncp);
 120 extern int              exp_export(struct nfsctl_export *nxp);
 121 extern int              exp_unexport(struct nfsctl_export *nxp);
 122
 123 #endif /* __KERNEL__ */
 124
 125 #endif /* NFSD_SYSCALL_H */