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