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 /*
  42  * Macros used to set version
  43  */
  44 #define NFSCTL_VERSET(_cltbits, _v)   ((_cltbits) |=  (1 << (_v)))
  45 #define NFSCTL_VERUNSET(_cltbits, _v) ((_cltbits) &= ~(1 << (_v)))
  46 #define NFSCTL_VERISSET(_cltbits, _v) ((_cltbits) & (1 << (_v)))
  47
  48 #if defined(CONFIG_NFSD_V4)
  49 #define NFSCTL_VERALL   (0x1c /* 0b011100 */)
  50 #elif defined(CONFIG_NFSD_V3)
  51 #define NFSCTL_VERALL   (0x0c /* 0b001100 */)
  52 #else
  53 #define NFSCTL_VERALL   (0x04 /* 0b000100 */)
  54 #endif
  55
  56 /* SVC */
  57 struct nfsctl_svc {
  58         unsigned short          svc_port;
  59         int                     svc_nthreads;
  60 };
  61
  62 /* ADDCLIENT/DELCLIENT */
  63 struct nfsctl_client {
  64         char                    cl_ident[NFSCLNT_IDMAX+1];
  65         int                     cl_naddr;
  66         struct in_addr          cl_addrlist[NFSCLNT_ADDRMAX];
  67         int                     cl_fhkeytype;
  68         int                     cl_fhkeylen;
  69         unsigned char           cl_fhkey[NFSCLNT_KEYMAX];
  70 };
  71
  72 /* EXPORT/UNEXPORT */
  73 struct nfsctl_export {
  74         char                    ex_client[NFSCLNT_IDMAX+1];
  75         char                    ex_path[NFS_MAXPATHLEN+1];
  76         __kernel_old_dev_t      ex_dev;
  77         __kernel_ino_t          ex_ino;
  78         int                     ex_flags;
  79         __kernel_uid_t          ex_anon_uid;
  80         __kernel_gid_t          ex_anon_gid;
  81 };
  82
  83 /* GETFD */
  84 struct nfsctl_fdparm {
  85         struct sockaddr         gd_addr;
  86         char                    gd_path[NFS_MAXPATHLEN+1];
  87         int                     gd_version;
  88 };
  89
  90 /* GETFS - GET Filehandle with Size */
  91 struct nfsctl_fsparm {
  92         struct sockaddr         gd_addr;
  93         char                    gd_path[NFS_MAXPATHLEN+1];
  94         int                     gd_maxlen;
  95 };
  96
  97 /*
  98  * This is the argument union.
  99  */
 100 struct nfsctl_arg {
 101         int                     ca_version;     /* safeguard */
 102         union {
 103                 struct nfsctl_svc       u_svc;
 104                 struct nfsctl_client    u_client;
 105                 struct nfsctl_export    u_export;
 106                 struct nfsctl_fdparm    u_getfd;
 107                 struct nfsctl_fsparm    u_getfs;
 108                 /*
 109                  * The following dummy member is needed to preserve binary compatibility
 110                  * on platforms where alignof(void*)>alignof(int).  It's needed because
 111                  * this union used to contain a member (u_umap) which contained a
 112                  * pointer.
 113                  */
 114                 void *u_ptr;
 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_getfd        u.u_getfd
 120 #define ca_getfs        u.u_getfs
 121 };
 122
 123 union nfsctl_res {
 124         __u8                    cr_getfh[NFS_FHSIZE];
 125         struct knfsd_fh         cr_getfs;
 126 };
 127
 128 #ifdef __KERNEL__
 129 /*
 130  * Kernel syscall implementation.
 131  */
 132 extern int              exp_addclient(struct nfsctl_client *ncp);
 133 extern int              exp_delclient(struct nfsctl_client *ncp);
 134 extern int              exp_export(struct nfsctl_export *nxp);
 135 extern int              exp_unexport(struct nfsctl_export *nxp);
 136
 137 extern unsigned int nfsd_versbits;
 138
 139 #endif /* __KERNEL__ */
 140
 141 #endif /* NFSD_SYSCALL_H */