contrib/amd/amd/amq_subr.c

   1 /*
   2  * Copyright (c) 1997-1999 Erez Zadok
   3  * Copyright (c) 1990 Jan-Simon Pendry
   4  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
   5  * Copyright (c) 1990 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: amq_subr.c,v 1.5 1999/08/24 21:31:06 ezk Exp $
  42  * $FreeBSD: src/contrib/amd/amd/amq_subr.c,v 1.5 1999/09/15 05:45:13 obrien Exp $
  43  * $DragonFly: src/contrib/amd/amd/amq_subr.c,v 1.2 2003/06/17 04:23:56 dillon Exp $
  44  *
  45  */
  46 /*
  47  * Auxiliary routines for amq tool
  48  */
  49
  50 #ifdef HAVE_CONFIG_H
  51 # include <config.h>
  52 #endif /* HAVE_CONFIG_H */
  53 #include <am_defs.h>
  54 #include <amd.h>
  55
  56 /* forward definitions */
  57 bool_t xdr_amq_mount_tree_node(XDR *xdrs, amq_mount_tree *objp);
  58 bool_t xdr_amq_mount_subtree(XDR *xdrs, amq_mount_tree *objp);
  59
  60
  61 voidp
  62 amqproc_null_1_svc(voidp argp, struct svc_req *rqstp)
  63 {
  64   static char res;
  65
  66   return (voidp) &res;
  67 }
  68
  69
  70 /*
  71  * Return a sub-tree of mounts
  72  */
  73 amq_mount_tree_p *
  74 amqproc_mnttree_1_svc(voidp argp, struct svc_req *rqstp)
  75 {
  76   static am_node *mp;
  77
  78   mp = find_ap(*(char **) argp);
  79   return (amq_mount_tree_p *) &mp;
  80 }
  81
  82
  83 /*
  84  * Unmount a single node
  85  */
  86 voidp
  87 amqproc_umnt_1_svc(voidp argp, struct svc_req *rqstp)
  88 {
  89   static char res;
  90   am_node *mp = find_ap(*(char **) argp);
  91
  92   if (mp)
  93     forcibly_timeout_mp(mp);
  94
  95   return (voidp) &res;
  96 }
  97
  98
  99 /*
 100  * Return global statistics
 101  */
 102 amq_mount_stats *
 103 amqproc_stats_1_svc(voidp argp, struct svc_req *rqstp)
 104 {
 105   return (amq_mount_stats *) &amd_stats;
 106 }
 107
 108
 109 /*
 110  * Return the entire tree of mount nodes
 111  */
 112 amq_mount_tree_list *
 113 amqproc_export_1_svc(voidp argp, struct svc_req *rqstp)
 114 {
 115   static amq_mount_tree_list aml;
 116
 117   aml.amq_mount_tree_list_val = (amq_mount_tree_p *) &exported_ap[0];
 118   aml.amq_mount_tree_list_len = 1;      /* XXX */
 119
 120   return &aml;
 121 }
 122
 123
 124 int *
 125 amqproc_setopt_1_svc(voidp argp, struct svc_req *rqstp)
 126 {
 127   static int rc;
 128   amq_setopt *opt = (amq_setopt *) argp;
 129
 130   rc = 0;
 131
 132   switch (opt->as_opt) {
 133
 134   case AMOPT_DEBUG:
 135 #ifdef DEBUG
 136     if (debug_option(opt->as_str))
 137 #endif /* DEBUG */
 138       rc = EINVAL;
 139     break;
 140
 141   case AMOPT_LOGFILE:
 142     if (gopt.logfile && opt->as_str
 143         && STREQ(gopt.logfile, opt->as_str)) {
 144       if (switch_to_logfile(opt->as_str, orig_umask))
 145         rc = EINVAL;
 146     } else {
 147       rc = EACCES;
 148     }
 149     break;
 150
 151   case AMOPT_XLOG:
 152     if (switch_option(opt->as_str))
 153       rc = EINVAL;
 154     break;
 155
 156   case AMOPT_FLUSHMAPC:
 157     if (amd_state == Run) {
 158       plog(XLOG_INFO, "amq says flush cache");
 159       do_mapc_reload = 0;
 160       flush_nfs_fhandle_cache((fserver *) 0);
 161       flush_srvr_nfs_cache();
 162     }
 163     break;
 164   }
 165
 166   return &rc;
 167 }
 168
 169
 170 amq_mount_info_list *
 171 amqproc_getmntfs_1_svc(voidp argp, struct svc_req *rqstp)
 172 {
 173   return (amq_mount_info_list *) &mfhead;       /* XXX */
 174 }
 175
 176 #ifdef ENABLE_AMQ_MOUNT
 177 /*
 178  * This is code that is vulnerable to IP spoofing attacks.  Unless you
 179  * absolutely need it, I suggest you do not enable it
 180  * (using configure --enable-amq-mount)
 181  */
 182 static int
 183 ok_security(struct svc_req *rqstp)
 184 {
 185   struct sockaddr_in *sin = (struct sockaddr_in *) NULL;
 186
 187   if ((sin = amu_svc_getcaller(rqstp->rq_xprt)) == NULL) {
 188     plog(XLOG_ERROR, "amu_svc_getcaller returned NULL");
 189     return(0);                  /* assume security is therefore not OK */
 190   }
 191
 192   if (ntohs(sin->sin_port) >= IPPORT_RESERVED ||
 193       !(sin->sin_addr.s_addr == htonl(0x7f000001) ||
 194         sin->sin_addr.s_addr == myipaddr.s_addr)) {
 195     char dq[20];
 196     plog(XLOG_INFO, "AMQ request from %s.%d DENIED",
 197          inet_dquad(dq, sin->sin_addr.s_addr),
 198          ntohs(sin->sin_port));
 199     return (0);
 200   }
 201
 202   return (1);
 203 }
 204
 205
 206 int *
 207 amqproc_mount_1_svc(voidp argp, struct svc_req *rqstp)
 208 {
 209   static int rc = EINVAL;
 210   char s[AMQ_STRLEN];
 211   char *cp;
 212   char dq[20];
 213   struct sockaddr_in *sin;
 214
 215   if ((sin = amu_svc_getcaller(rqstp->rq_xprt)) == NULL) {
 216     plog(XLOG_ERROR, "amu_svc_getcaller returned NULL");
 217     return &rc;
 218   }
 219
 220   strncpy(s, *(amq_string *) argp, AMQ_STRLEN-1);
 221   s[AMQ_STRLEN-1] = '\0';       /* null terminate, to be sure */
 222   plog(XLOG_ERROR,
 223        "amq requested mount of %s from %s.%d",
 224        s, inet_dquad(dq, sin->sin_addr.s_addr),
 225        ntohs(sin->sin_port));
 226
 227   /*
 228    * Minimalist security check.
 229    */
 230   if (!ok_security(rqstp)) {
 231     rc = EACCES;
 232     return &rc;
 233   }
 234   /*
 235    * Find end of key
 236    */
 237   for (cp = (char *) s; *cp && (!isascii(*cp) || !isspace(*cp)); cp++) ;
 238
 239   if (!*cp) {
 240     plog(XLOG_INFO, "amqproc_mount: Invalid arguments");
 241     rc = EINVAL;
 242     return &rc;
 243   }
 244   *cp++ = '\0';
 245
 246   /*
 247    * Find start of value
 248    */
 249   while (*cp && isascii(*cp) && isspace(*cp))
 250     cp++;
 251
 252   root_newmap(s, cp, (char *) 0, NULL);
 253   rc = mount_auto_node(s, (voidp) root_node);
 254   if (rc < 0)
 255     return 0;
 256   return &rc;
 257 }
 258 #endif /* ENABLE_AMQ_MOUNT */
 259
 260
 261 amq_string *
 262 amqproc_getvers_1_svc(voidp argp, struct svc_req *rqstp)
 263 {
 264   static amq_string res;
 265
 266   res = get_version_string();
 267   return &res;
 268 }
 269
 270
 271 /* get PID of remote amd */
 272 int *
 273 amqproc_getpid_1_svc(voidp argp, struct svc_req *rqstp)
 274 {
 275   static int res;
 276
 277   res = getpid();
 278   return &res;
 279 }
 280
 281
 282 /*
 283  * XDR routines.
 284  */
 285
 286
 287 bool_t
 288 xdr_amq_setopt(XDR *xdrs, amq_setopt *objp)
 289 {
 290   if (!xdr_enum(xdrs, (enum_t *) & objp->as_opt)) {
 291     return (FALSE);
 292   }
 293   if (!xdr_string(xdrs, &objp->as_str, AMQ_STRLEN)) {
 294     return (FALSE);
 295   }
 296   return (TRUE);
 297 }
 298
 299
 300 /*
 301  * More XDR routines  - Should be used for OUTPUT ONLY.
 302  */
 303 bool_t
 304 xdr_amq_mount_tree_node(XDR *xdrs, amq_mount_tree *objp)
 305 {
 306   am_node *mp = (am_node *) objp;
 307   long mtime;
 308
 309   if (!xdr_amq_string(xdrs, &mp->am_mnt->mf_info)) {
 310     return (FALSE);
 311   }
 312   if (!xdr_amq_string(xdrs, &mp->am_path)) {
 313     return (FALSE);
 314   }
 315   if (!xdr_amq_string(xdrs, mp->am_link ? &mp->am_link : &mp->am_mnt->mf_mount)) {
 316     return (FALSE);
 317   }
 318   if (!xdr_amq_string(xdrs, &mp->am_mnt->mf_ops->fs_type)) {
 319     return (FALSE);
 320   }
 321   mtime = mp->am_stats.s_mtime;
 322   if (!xdr_long(xdrs, &mtime)) {
 323     return (FALSE);
 324   }
 325   if (!xdr_u_short(xdrs, &mp->am_stats.s_uid)) {
 326     return (FALSE);
 327   }
 328   if (!xdr_int(xdrs, &mp->am_stats.s_getattr)) {
 329     return (FALSE);
 330   }
 331   if (!xdr_int(xdrs, &mp->am_stats.s_lookup)) {
 332     return (FALSE);
 333   }
 334   if (!xdr_int(xdrs, &mp->am_stats.s_readdir)) {
 335     return (FALSE);
 336   }
 337   if (!xdr_int(xdrs, &mp->am_stats.s_readlink)) {
 338     return (FALSE);
 339   }
 340   if (!xdr_int(xdrs, &mp->am_stats.s_statfs)) {
 341     return (FALSE);
 342   }
 343   return (TRUE);
 344 }
 345
 346
 347 bool_t
 348 xdr_amq_mount_subtree(XDR *xdrs, amq_mount_tree *objp)
 349 {
 350   am_node *mp = (am_node *) objp;
 351
 352   if (!xdr_amq_mount_tree_node(xdrs, objp)) {
 353     return (FALSE);
 354   }
 355   if (!xdr_pointer(xdrs, (char **) &mp->am_osib, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_subtree)) {
 356     return (FALSE);
 357   }
 358   if (!xdr_pointer(xdrs, (char **) &mp->am_child, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_subtree)) {
 359     return (FALSE);
 360   }
 361   return (TRUE);
 362 }
 363
 364
 365 bool_t
 366 xdr_amq_mount_tree(XDR *xdrs, amq_mount_tree *objp)
 367 {
 368   am_node *mp = (am_node *) objp;
 369   am_node *mnil = 0;
 370
 371   if (!xdr_amq_mount_tree_node(xdrs, objp)) {
 372     return (FALSE);
 373   }
 374   if (!xdr_pointer(xdrs, (char **) &mnil, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_subtree)) {
 375     return (FALSE);
 376   }
 377   if (!xdr_pointer(xdrs, (char **) &mp->am_child, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_subtree)) {
 378     return (FALSE);
 379   }
 380   return (TRUE);
 381 }
 382
 383
 384 bool_t
 385 xdr_amq_mount_tree_p(XDR *xdrs, amq_mount_tree_p *objp)
 386 {
 387   if (!xdr_pointer(xdrs, (char **) objp, sizeof(amq_mount_tree), (XDRPROC_T_TYPE) xdr_amq_mount_tree)) {
 388     return (FALSE);
 389   }
 390   return (TRUE);
 391 }
 392
 393
 394 bool_t
 395 xdr_amq_mount_stats(XDR *xdrs, amq_mount_stats *objp)
 396 {
 397   if (!xdr_int(xdrs, &objp->as_drops)) {
 398     return (FALSE);
 399   }
 400   if (!xdr_int(xdrs, &objp->as_stale)) {
 401     return (FALSE);
 402   }
 403   if (!xdr_int(xdrs, &objp->as_mok)) {
 404     return (FALSE);
 405   }
 406   if (!xdr_int(xdrs, &objp->as_merr)) {
 407     return (FALSE);
 408   }
 409   if (!xdr_int(xdrs, &objp->as_uerr)) {
 410     return (FALSE);
 411   }
 412   return (TRUE);
 413 }
 414
 415
 416
 417 bool_t
 418 xdr_amq_mount_tree_list(XDR *xdrs, amq_mount_tree_list *objp)
 419 {
 420   if (!xdr_array(xdrs,
 421                  (char **) &objp->amq_mount_tree_list_val,
 422                  (u_int *) &objp->amq_mount_tree_list_len,
 423                  ~0,
 424                  sizeof(amq_mount_tree_p),
 425                  (XDRPROC_T_TYPE) xdr_amq_mount_tree_p)) {
 426     return (FALSE);
 427   }
 428   return (TRUE);
 429 }
 430
 431
 432
 433 /*
 434  * Compute length of list
 435  */
 436 bool_t
 437 xdr_amq_mount_info_qelem(XDR *xdrs, qelem *qhead)
 438 {
 439   mntfs *mf;
 440   u_int len = 0;
 441
 442   for (mf = AM_LAST(mntfs, qhead); mf != HEAD(mntfs, qhead); mf = PREV(mntfs, mf)) {
 443     if (!(mf->mf_ops->fs_flags & FS_AMQINFO))
 444       continue;
 445     len++;
 446   }
 447   xdr_u_int(xdrs, &len);
 448
 449   /*
 450    * Send individual data items
 451    */
 452   for (mf = AM_LAST(mntfs, qhead); mf != HEAD(mntfs, qhead); mf = PREV(mntfs, mf)) {
 453     int up;
 454     if (!(mf->mf_ops->fs_flags & FS_AMQINFO))
 455       continue;
 456
 457     if (!xdr_amq_string(xdrs, &mf->mf_ops->fs_type)) {
 458       return (FALSE);
 459     }
 460     if (!xdr_amq_string(xdrs, &mf->mf_mount)) {
 461       return (FALSE);
 462     }
 463     if (!xdr_amq_string(xdrs, &mf->mf_info)) {
 464       return (FALSE);
 465     }
 466     if (!xdr_amq_string(xdrs, &mf->mf_server->fs_host)) {
 467       return (FALSE);
 468     }
 469     if (!xdr_int(xdrs, &mf->mf_error)) {
 470       return (FALSE);
 471     }
 472     if (!xdr_int(xdrs, &mf->mf_refc)) {
 473       return (FALSE);
 474     }
 475     if (mf->mf_server->fs_flags & FSF_ERROR)
 476       up = 0;
 477     else
 478       switch (mf->mf_server->fs_flags & (FSF_DOWN | FSF_VALID)) {
 479       case FSF_DOWN | FSF_VALID:
 480         up = 0;
 481         break;
 482       case FSF_VALID:
 483         up = 1;
 484         break;
 485       default:
 486         up = -1;
 487         break;
 488       }
 489     if (!xdr_int(xdrs, &up)) {
 490       return (FALSE);
 491     }
 492   }
 493   return (TRUE);
 494 }
 495
 496
 497 bool_t
 498 xdr_pri_free(XDRPROC_T_TYPE xdr_args, caddr_t args_ptr)
 499 {
 500   XDR xdr;
 501
 502   xdr.x_op = XDR_FREE;
 503   return ((*xdr_args) (&xdr, (caddr_t *) args_ptr));
 504 }