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 */
  42 struct nfsctl_svc {
  43         unsigned short          svc_port;
  44         int                     svc_nthreads;
  45 };
  46
  47 /* ADDCLIENT/DELCLIENT */
  48 struct 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 */
  58 struct 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 */
  69 struct 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 */
  76 struct 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  */
  85 struct 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
 108 union 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  */
 117 extern int              exp_addclient(struct nfsctl_client *ncp);
 118 extern int              exp_delclient(struct nfsctl_client *ncp);
 119 extern int              exp_export(struct nfsctl_export *nxp);
 120 extern int              exp_unexport(struct nfsctl_export *nxp);
 121
 122 #endif /* __KERNEL__ */
 123
 124 #endif /* NFSD_SYSCALL_H */