contrib/amd/amd/nfs_prot_svc.c

   1 /*
   2  * Copyright (c) 1997-1999 Erez Zadok
   3  * Copyright (c) 1989 Jan-Simon Pendry
   4  * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
   5  * Copyright (c) 1989 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Jan-Simon Pendry at Imperial College, London.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgment:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  *
  39  *      %W% (Berkeley) %G%
  40  *
  41  * $Id: nfs_prot_svc.c,v 1.4 1999/08/22 21:12:30 ezk Exp $
  42  *
  43  */
  44
  45 #ifdef HAVE_CONFIG_H
  46 # include <config.h>
  47 #endif /* HAVE_CONFIG_H */
  48 #include <am_defs.h>
  49 #include <amd.h>
  50
  51 /* external definitions */
  52 extern voidp nfsproc_null_2_svc(voidp, struct svc_req *);
  53 extern nfsattrstat * nfsproc_getattr_2_svc(am_nfs_fh *, struct svc_req *);
  54 extern nfsattrstat * nfsproc_setattr_2_svc(nfssattrargs *, struct svc_req *);
  55 extern voidp nfsproc_root_2_svc(voidp, struct svc_req *);
  56 extern nfsdiropres * nfsproc_lookup_2_svc(nfsdiropargs *, struct svc_req *);
  57 extern nfsreadlinkres * nfsproc_readlink_2_svc(am_nfs_fh *, struct svc_req *);
  58 extern nfsreadres * nfsproc_read_2_svc(nfsreadargs *, struct svc_req *);
  59 extern voidp nfsproc_writecache_2_svc(voidp, struct svc_req *);
  60 extern nfsattrstat * nfsproc_write_2_svc(nfswriteargs *, struct svc_req *);
  61 extern nfsdiropres * nfsproc_create_2_svc(nfscreateargs *, struct svc_req *);
  62 extern nfsstat * nfsproc_remove_2_svc(nfsdiropargs *, struct svc_req *);
  63 extern nfsstat * nfsproc_rename_2_svc(nfsrenameargs *, struct svc_req *);
  64 extern nfsstat * nfsproc_link_2_svc(nfslinkargs *, struct svc_req *);
  65 extern nfsstat * nfsproc_symlink_2_svc(nfssymlinkargs *, struct svc_req *);
  66 extern nfsdiropres * nfsproc_mkdir_2_svc(nfscreateargs *, struct svc_req *);
  67 extern nfsstat * nfsproc_rmdir_2_svc(nfsdiropargs *, struct svc_req *);
  68 extern nfsreaddirres * nfsproc_readdir_2_svc(nfsreaddirargs *, struct svc_req *);
  69 extern nfsstatfsres * nfsproc_statfs_2_svc(am_nfs_fh *, struct svc_req *);
  70
  71 /* global variables */
  72 SVCXPRT *nfs_program_2_transp;
  73
  74 /* typedefs */
  75 typedef char *(*nfssvcproc_t)(voidp, struct svc_req *);
  76
  77
  78 void
  79 nfs_program_2(struct svc_req *rqstp, SVCXPRT *transp)
  80 {
  81   union {
  82     am_nfs_fh           nfsproc_getattr_2_arg;
  83     nfssattrargs        nfsproc_setattr_2_arg;
  84     nfsdiropargs        nfsproc_lookup_2_arg;
  85     am_nfs_fh           nfsproc_readlink_2_arg;
  86     nfsreadargs         nfsproc_read_2_arg;
  87     nfswriteargs        nfsproc_write_2_arg;
  88     nfscreateargs       nfsproc_create_2_arg;
  89     nfsdiropargs        nfsproc_remove_2_arg;
  90     nfsrenameargs       nfsproc_rename_2_arg;
  91     nfslinkargs         nfsproc_link_2_arg;
  92     nfssymlinkargs      nfsproc_symlink_2_arg;
  93     nfscreateargs       nfsproc_mkdir_2_arg;
  94     nfsdiropargs        fsproc_rmdir_2_arg;
  95     nfsreaddirargs      nfsproc_readdir_2_arg;
  96     am_nfs_fh           nfsproc_statfs_2_arg;
  97   } argument;
  98   char *result;
  99   xdrproc_t xdr_argument, xdr_result;
 100   nfssvcproc_t local;
 101   struct sockaddr_in *sinp;
 102   char dq[20], dq2[28];
 103
 104   sinp = amu_svc_getcaller(rqstp->rq_xprt);
 105 #ifdef MNT2_NFS_OPT_RESVPORT
 106   /* Verify that the request comes from a reserved port */
 107   if (ntohs(sinp->sin_port) >= IPPORT_RESERVED) {
 108     plog(XLOG_WARNING, "ignoring request from %s:%u, port not reserved",
 109          inet_dquad(dq, sinp->sin_addr.s_addr),
 110          ntohs(sinp->sin_port));
 111     return;
 112   }
 113 #endif /* MNT2_NFS_OPT_RESVPORT */
 114   /* if the address does not match, ignore the request */
 115   if (sinp->sin_addr.s_addr && sinp->sin_addr.s_addr != myipaddr.s_addr) {
 116     plog(XLOG_WARNING, "ignoring request from %s:%u, expected %s",
 117          inet_dquad(dq, sinp->sin_addr.s_addr),
 118          ntohs(sinp->sin_port),
 119          inet_dquad(dq2, myipaddr.s_addr));
 120     return;
 121   }
 122
 123   nfs_program_2_transp = NULL;
 124
 125   switch (rqstp->rq_proc) {
 126
 127   case NFSPROC_NULL:
 128     xdr_argument = (xdrproc_t) xdr_void;
 129     xdr_result = (xdrproc_t) xdr_void;
 130     local = (nfssvcproc_t) nfsproc_null_2_svc;
 131     break;
 132
 133   case NFSPROC_GETATTR:
 134     xdr_argument = (xdrproc_t) xdr_nfs_fh;
 135     xdr_result = (xdrproc_t) xdr_attrstat;
 136     local = (nfssvcproc_t) nfsproc_getattr_2_svc;
 137     break;
 138
 139   case NFSPROC_SETATTR:
 140     xdr_argument = (xdrproc_t) xdr_sattrargs;
 141     xdr_result = (xdrproc_t) xdr_attrstat;
 142     local = (nfssvcproc_t) nfsproc_setattr_2_svc;
 143     break;
 144
 145   case NFSPROC_ROOT:
 146     xdr_argument = (xdrproc_t) xdr_void;
 147     xdr_result = (xdrproc_t) xdr_void;
 148     local = (nfssvcproc_t) nfsproc_root_2_svc;
 149     break;
 150
 151   case NFSPROC_LOOKUP:
 152     xdr_argument = (xdrproc_t) xdr_diropargs;
 153     xdr_result = (xdrproc_t) xdr_diropres;
 154     local = (nfssvcproc_t) nfsproc_lookup_2_svc;
 155     /*
 156      * Cheap way to pass transp down to amfs_auto_lookuppn so it can
 157      * be stored in the am_node structure and later used for
 158      * quick_reply().
 159      */
 160     nfs_program_2_transp = transp;
 161     break;
 162
 163   case NFSPROC_READLINK:
 164     xdr_argument = (xdrproc_t) xdr_nfs_fh;
 165     xdr_result = (xdrproc_t) xdr_readlinkres;
 166     local = (nfssvcproc_t) nfsproc_readlink_2_svc;
 167     break;
 168
 169   case NFSPROC_READ:
 170     xdr_argument = (xdrproc_t) xdr_readargs;
 171     xdr_result = (xdrproc_t) xdr_readres;
 172     local = (nfssvcproc_t) nfsproc_read_2_svc;
 173     break;
 174
 175   case NFSPROC_WRITECACHE:
 176     xdr_argument = (xdrproc_t) xdr_void;
 177     xdr_result = (xdrproc_t) xdr_void;
 178     local = (nfssvcproc_t) nfsproc_writecache_2_svc;
 179     break;
 180
 181   case NFSPROC_WRITE:
 182     xdr_argument = (xdrproc_t) xdr_writeargs;
 183     xdr_result = (xdrproc_t) xdr_attrstat;
 184     local = (nfssvcproc_t) nfsproc_write_2_svc;
 185     break;
 186
 187   case NFSPROC_CREATE:
 188     xdr_argument = (xdrproc_t) xdr_createargs;
 189     xdr_result = (xdrproc_t) xdr_diropres;
 190     local = (nfssvcproc_t) nfsproc_create_2_svc;
 191     break;
 192
 193   case NFSPROC_REMOVE:
 194     xdr_argument = (xdrproc_t) xdr_diropargs;
 195     xdr_result = (xdrproc_t) xdr_nfsstat;
 196     local = (nfssvcproc_t) nfsproc_remove_2_svc;
 197     break;
 198
 199   case NFSPROC_RENAME:
 200     xdr_argument = (xdrproc_t) xdr_renameargs;
 201     xdr_result = (xdrproc_t) xdr_nfsstat;
 202     local = (nfssvcproc_t) nfsproc_rename_2_svc;
 203     break;
 204
 205   case NFSPROC_LINK:
 206     xdr_argument = (xdrproc_t) xdr_linkargs;
 207     xdr_result = (xdrproc_t) xdr_nfsstat;
 208     local = (nfssvcproc_t) nfsproc_link_2_svc;
 209     break;
 210
 211   case NFSPROC_SYMLINK:
 212     xdr_argument = (xdrproc_t) xdr_symlinkargs;
 213     xdr_result = (xdrproc_t) xdr_nfsstat;
 214     local = (nfssvcproc_t) nfsproc_symlink_2_svc;
 215     break;
 216
 217   case NFSPROC_MKDIR:
 218     xdr_argument = (xdrproc_t) xdr_createargs;
 219     xdr_result = (xdrproc_t) xdr_diropres;
 220     local = (nfssvcproc_t) nfsproc_mkdir_2_svc;
 221     break;
 222
 223   case NFSPROC_RMDIR:
 224     xdr_argument = (xdrproc_t) xdr_diropargs;
 225     xdr_result = (xdrproc_t) xdr_nfsstat;
 226     local = (nfssvcproc_t) nfsproc_rmdir_2_svc;
 227     break;
 228
 229   case NFSPROC_READDIR:
 230     xdr_argument = (xdrproc_t) xdr_readdirargs;
 231     xdr_result = (xdrproc_t) xdr_readdirres;
 232     local = (nfssvcproc_t) nfsproc_readdir_2_svc;
 233     break;
 234
 235   case NFSPROC_STATFS:
 236     xdr_argument = (xdrproc_t) xdr_nfs_fh;
 237     xdr_result = (xdrproc_t) xdr_statfsres;
 238     local = (nfssvcproc_t) nfsproc_statfs_2_svc;
 239     break;
 240
 241   default:
 242     svcerr_noproc(transp);
 243     return;
 244   }
 245
 246   memset((char *) &argument, 0, sizeof(argument));
 247   if (!svc_getargs(transp,
 248                    (XDRPROC_T_TYPE) xdr_argument,
 249                    (SVC_IN_ARG_TYPE) &argument)) {
 250     plog(XLOG_ERROR,
 251          "NFS xdr decode failed for %d %d %d",
 252          (int) rqstp->rq_prog, (int) rqstp->rq_vers, (int) rqstp->rq_proc);
 253     svcerr_decode(transp);
 254     return;
 255   }
 256   result = (*local) (&argument, rqstp);
 257
 258   nfs_program_2_transp = NULL;
 259
 260   if (result != NULL && !svc_sendreply(transp,
 261                                        (XDRPROC_T_TYPE) xdr_result,
 262                                        result)) {
 263     svcerr_systemerr(transp);
 264   }
 265   if (!svc_freeargs(transp,
 266                     (XDRPROC_T_TYPE) xdr_argument,
 267                     (SVC_IN_ARG_TYPE) & argument)) {
 268     plog(XLOG_FATAL, "unable to free rpc arguments in nfs_program_2");
 269     going_down(1);
 270   }
 271 }