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