git.sur5r.net Git - openldap/blob - servers/slapd/backend.c

   1 /* backend.c - routines for dealing with back-end databases */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2008 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27
  28 #include "portable.h"
  29
  30 #include <stdio.h>
  31
  32 #include <ac/string.h>
  33 #include <ac/socket.h>
  34 #include <sys/stat.h>
  35
  36 #include "slap.h"
  37 #include "config.h"
  38 #include "lutil.h"
  39 #include "lber_pvt.h"
  40
  41 /*
  42  * If a module is configured as dynamic, its header should not
  43  * get included into slapd. While this is a general rule and does
  44  * not have much of an effect in UNIX, this rule should be adhered
  45  * to for Windows, where dynamic object code should not be implicitly
  46  * imported into slapd without appropriate __declspec(dllimport) directives.
  47  */
  48
  49 int                     nBackendInfo = 0;
  50 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  51
  52 int                     nBackendDB = 0;
  53 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  54
  55 static int
  56 backend_init_controls( BackendInfo *bi )
  57 {
  58         if ( bi->bi_controls ) {
  59                 int     i;
  60
  61                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  62                         int     cid;
  63
  64                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  65                                         == LDAP_CONTROL_NOT_FOUND )
  66                         {
  67                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  68                                         assert( 0 );
  69                                 }
  70
  71                                 return -1;
  72                         }
  73
  74                         bi->bi_ctrls[ cid ] = 1;
  75                 }
  76         }
  77
  78         return 0;
  79 }
  80
  81 int backend_init(void)
  82 {
  83         int rc = -1;
  84         BackendInfo *bi;
  85
  86         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  87                 /* already initialized */
  88                 Debug( LDAP_DEBUG_ANY,
  89                         "backend_init: already initialized\n", 0, 0, 0 );
  90                 return -1;
  91         }
  92
  93         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  94                 assert( bi->bi_init != 0 );
  95
  96                 rc = bi->bi_init( bi );
  97
  98                 if(rc != 0) {
  99                         Debug( LDAP_DEBUG_ANY,
 100                                 "backend_init: initialized for type \"%s\"\n",
 101                                 bi->bi_type, 0, 0 );
 102                         /* destroy those we've already inited */
 103                         for( nBackendInfo--;
 104                                 nBackendInfo >= 0 ;
 105                                 nBackendInfo-- )
 106                         {
 107                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 108                                         slap_binfo[nBackendInfo].bi_destroy(
 109                                                 &slap_binfo[nBackendInfo] );
 110                                 }
 111                         }
 112                         return rc;
 113                 }
 114
 115                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 116         }
 117
 118         if ( nBackendInfo > 0) {
 119                 return 0;
 120         }
 121
 122 #ifdef SLAPD_MODULES
 123         return 0;
 124 #else
 125
 126         Debug( LDAP_DEBUG_ANY,
 127                 "backend_init: failed\n",
 128                 0, 0, 0 );
 129
 130         return rc;
 131 #endif /* SLAPD_MODULES */
 132 }
 133
 134 int backend_add(BackendInfo *aBackendInfo)
 135 {
 136         int rc = 0;
 137
 138         if ( aBackendInfo->bi_init == NULL ) {
 139                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 140                         "backend type \"%s\" does not have the (mandatory)init function\n",
 141                         aBackendInfo->bi_type, 0, 0 );
 142                 return -1;
 143         }
 144
 145         rc = aBackendInfo->bi_init(aBackendInfo);
 146         if ( rc != 0) {
 147                 Debug( LDAP_DEBUG_ANY,
 148                         "backend_add:  initialization for type \"%s\" failed\n",
 149                         aBackendInfo->bi_type, 0, 0 );
 150                 return rc;
 151         }
 152
 153         (void)backend_init_controls( aBackendInfo );
 154
 155         /* now add the backend type to the Backend Info List */
 156         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 157         nBackendInfo++;
 158         return 0;
 159 }
 160
 161 static int
 162 backend_set_controls( BackendDB *be )
 163 {
 164         BackendInfo     *bi = be->bd_info;
 165
 166         /* back-relay takes care of itself; so may do other */
 167         if ( overlay_is_over( be ) ) {
 168                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 169         }
 170
 171         if ( bi->bi_controls ) {
 172                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 173                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 174                                         sizeof( be->be_ctrls ) );
 175                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 176
 177                 } else {
 178                         int     i;
 179
 180                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 181                                 if ( bi->bi_ctrls[ i ] ) {
 182                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 183                                 }
 184                         }
 185                 }
 186
 187         }
 188
 189         return 0;
 190 }
 191
 192 /* startup a specific backend database */
 193 int backend_startup_one(Backend *be, ConfigReply *cr)
 194 {
 195         int             rc = 0;
 196
 197         assert( be != NULL );
 198
 199         be->be_pending_csn_list = (struct be_pcl *)
 200                 ch_calloc( 1, sizeof( struct be_pcl ) );
 201
 202         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 203
 204         Debug( LDAP_DEBUG_TRACE,
 205                 "backend_startup_one: starting \"%s\"\n",
 206                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 207                 0, 0 );
 208
 209         /* set database controls */
 210         (void)backend_set_controls( be );
 211
 212 #if 0
 213         if ( !BER_BVISEMPTY( &be->be_rootndn )
 214                 && select_backend( &be->be_rootndn, 0 ) == be
 215                 && BER_BVISNULL( &be->be_rootpw ) )
 216         {
 217                 /* warning: if rootdn entry is created,
 218                  * it can take rootdn privileges;
 219                  * set empty rootpw to prevent */
 220         }
 221 #endif
 222
 223         if ( be->bd_info->bi_db_open ) {
 224                 rc = be->bd_info->bi_db_open( be, cr );
 225                 if ( rc == 0 ) {
 226                         (void)backend_set_controls( be );
 227
 228                 } else {
 229                         Debug( LDAP_DEBUG_ANY,
 230                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 231                                 rc, 0, 0 );
 232                 }
 233         }
 234
 235         return rc;
 236 }
 237
 238 int backend_startup(Backend *be)
 239 {
 240         int i;
 241         int rc = 0;
 242         BackendInfo *bi;
 243         ConfigReply cr={0, ""};
 244
 245         if( ! ( nBackendDB > 0 ) ) {
 246                 /* no databases */
 247                 Debug( LDAP_DEBUG_ANY,
 248                         "backend_startup: %d databases to startup.\n",
 249                         nBackendDB, 0, 0 );
 250                 return 1;
 251         }
 252
 253         if(be != NULL) {
 254                 if ( be->bd_info->bi_open ) {
 255                         rc = be->bd_info->bi_open( be->bd_info );
 256                         if ( rc != 0 ) {
 257                                 Debug( LDAP_DEBUG_ANY,
 258                                         "backend_startup: bi_open failed!\n",
 259                                         0, 0, 0 );
 260
 261                                 return rc;
 262                         }
 263                 }
 264                 /* append global access controls */
 265                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 266
 267                 return backend_startup_one( be, &cr );
 268         }
 269
 270         /* open frontend, if required */
 271         if ( frontendDB->bd_info->bi_db_open ) {
 272                 rc = frontendDB->bd_info->bi_db_open( frontendDB, &cr );
 273                 if ( rc != 0 ) {
 274                         Debug( LDAP_DEBUG_ANY,
 275                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 276                                 rc, 0, 0 );
 277                         return rc;
 278                 }
 279         }
 280
 281         /* open each backend type */
 282         i = -1;
 283         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 284                 i++;
 285                 if( bi->bi_nDB == 0) {
 286                         /* no database of this type, don't open */
 287                         continue;
 288                 }
 289
 290                 if( bi->bi_open ) {
 291                         rc = bi->bi_open( bi );
 292                         if ( rc != 0 ) {
 293                                 Debug( LDAP_DEBUG_ANY,
 294                                         "backend_startup: bi_open %d (%s) failed!\n",
 295                                         i, bi->bi_type, 0 );
 296                                 return rc;
 297                         }
 298                 }
 299
 300                 (void)backend_init_controls( bi );
 301         }
 302
 303         /* open each backend database */
 304         i = -1;
 305         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 306                 i++;
 307                 if ( be->be_suffix == NULL ) {
 308                         Debug( LDAP_DEBUG_ANY,
 309                                 "backend_startup: warning, database %d (%s) "
 310                                 "has no suffix\n",
 311                                 i, be->bd_info->bi_type, 0 );
 312                 }
 313                 /* append global access controls */
 314                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 315
 316                 rc = backend_startup_one( be, &cr );
 317
 318                 if ( rc ) return rc;
 319         }
 320
 321         return rc;
 322 }
 323
 324 int backend_num( Backend *be )
 325 {
 326         int i = 0;
 327         BackendDB *b2;
 328
 329         if( be == NULL ) return -1;
 330
 331         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 332                 if( be == b2 ) return i;
 333                 i++;
 334         }
 335         return -1;
 336 }
 337
 338 int backend_shutdown( Backend *be )
 339 {
 340         int rc = 0;
 341         BackendInfo *bi;
 342
 343         if( be != NULL ) {
 344                 /* shutdown a specific backend database */
 345
 346                 if ( be->bd_info->bi_nDB == 0 ) {
 347                         /* no database of this type, we never opened it */
 348                         return 0;
 349                 }
 350
 351                 if ( be->bd_info->bi_db_close ) {
 352                         rc = be->bd_info->bi_db_close( be, NULL );
 353                         if ( rc ) return rc;
 354                 }
 355
 356                 if( be->bd_info->bi_close ) {
 357                         rc = be->bd_info->bi_close( be->bd_info );
 358                         if ( rc ) return rc;
 359                 }
 360
 361                 return 0;
 362         }
 363
 364         /* close each backend database */
 365         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 366                 if ( be->bd_info->bi_db_close ) {
 367                         be->bd_info->bi_db_close( be, NULL );
 368                 }
 369
 370                 if(rc != 0) {
 371                         Debug( LDAP_DEBUG_ANY,
 372                                 "backend_close: bi_db_close %s failed!\n",
 373                                 be->be_type, 0, 0 );
 374                 }
 375         }
 376
 377         /* close each backend type */
 378         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 379                 if( bi->bi_nDB == 0 ) {
 380                         /* no database of this type */
 381                         continue;
 382                 }
 383
 384                 if( bi->bi_close ) {
 385                         bi->bi_close( bi );
 386                 }
 387         }
 388
 389         /* close frontend, if required */
 390         if ( frontendDB->bd_info->bi_db_close ) {
 391                 rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL );
 392                 if ( rc != 0 ) {
 393                         Debug( LDAP_DEBUG_ANY,
 394                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 395                                 rc, 0, 0 );
 396                 }
 397         }
 398
 399         return 0;
 400 }
 401
 402 /*
 403  * This function is supposed to be the exact counterpart
 404  * of backend_startup_one(), although this one calls bi_db_destroy()
 405  * while backend_startup_one() calls bi_db_open().
 406  *
 407  * Make sure backend_stopdown_one() destroys resources allocated
 408  * by backend_startup_one(); only call backend_destroy_one() when
 409  * all stuff in a BackendDB needs to be destroyed
 410  */
 411 void
 412 backend_stopdown_one( BackendDB *bd )
 413 {
 414         if ( bd->be_pending_csn_list ) {
 415                 struct slap_csn_entry *csne;
 416                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 417                 while ( csne ) {
 418                         struct slap_csn_entry *tmp_csne = csne;
 419
 420                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 421                         ch_free( csne->ce_csn.bv_val );
 422                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 423                         ch_free( tmp_csne );
 424                 }
 425                 ch_free( bd->be_pending_csn_list );
 426         }
 427
 428         if ( bd->bd_info->bi_db_destroy ) {
 429                 bd->bd_info->bi_db_destroy( bd, NULL );
 430         }
 431 }
 432
 433 void backend_destroy_one( BackendDB *bd, int dynamic )
 434 {
 435         if ( dynamic ) {
 436                 LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next );
 437         }
 438
 439         if ( bd->be_syncinfo ) {
 440                 syncinfo_free( bd->be_syncinfo, 1 );
 441         }
 442
 443         backend_stopdown_one( bd );
 444
 445         ber_bvarray_free( bd->be_suffix );
 446         ber_bvarray_free( bd->be_nsuffix );
 447         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 448                 free( bd->be_rootdn.bv_val );
 449         }
 450         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 451                 free( bd->be_rootndn.bv_val );
 452         }
 453         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 454                 free( bd->be_rootpw.bv_val );
 455         }
 456         acl_destroy( bd->be_acl, frontendDB->be_acl );
 457         limits_destroy( bd->be_limits );
 458         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 459                 ch_free( bd->be_update_ndn.bv_val );
 460         }
 461         if ( bd->be_update_refs ) {
 462                 ber_bvarray_free( bd->be_update_refs );
 463         }
 464
 465         if ( dynamic ) {
 466                 free( bd );
 467         }
 468 }
 469
 470 int backend_destroy(void)
 471 {
 472         BackendDB *bd;
 473         BackendInfo *bi;
 474
 475         /* destroy each backend database */
 476         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 477                 backend_destroy_one( bd, 1 );
 478         }
 479
 480         /* destroy each backend type */
 481         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 482                 if( bi->bi_destroy ) {
 483                         bi->bi_destroy( bi );
 484                 }
 485         }
 486
 487         nBackendInfo = 0;
 488         LDAP_STAILQ_INIT(&backendInfo);
 489
 490         /* destroy frontend database */
 491         bd = frontendDB;
 492         if ( bd ) {
 493                 if ( bd->bd_info->bi_db_destroy ) {
 494                         bd->bd_info->bi_db_destroy( bd, NULL );
 495                 }
 496                 ber_bvarray_free( bd->be_suffix );
 497                 ber_bvarray_free( bd->be_nsuffix );
 498                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 499                         free( bd->be_rootdn.bv_val );
 500                 }
 501                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 502                         free( bd->be_rootndn.bv_val );
 503                 }
 504                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 505                         free( bd->be_rootpw.bv_val );
 506                 }
 507                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 508         }
 509
 510         return 0;
 511 }
 512
 513 BackendInfo* backend_info(const char *type)
 514 {
 515         BackendInfo *bi;
 516
 517         /* search for the backend type */
 518         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 519                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 520                         return bi;
 521                 }
 522         }
 523
 524         return NULL;
 525 }
 526
 527 void
 528 backend_db_insert(
 529         BackendDB *be,
 530         int idx
 531 )
 532 {
 533         /* If idx < 0, just add to end of list */
 534         if ( idx < 0 ) {
 535                 LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 536         } else if ( idx == 0 ) {
 537                 LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next);
 538         } else {
 539                 int i;
 540                 BackendDB *b2;
 541
 542                 b2 = LDAP_STAILQ_FIRST(&backendDB);
 543                 idx--;
 544                 for (i=0; i<idx; i++) {
 545                         b2 = LDAP_STAILQ_NEXT(b2, be_next);
 546                 }
 547                 LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next);
 548         }
 549 }
 550
 551 void
 552 backend_db_move(
 553         BackendDB *be,
 554         int idx
 555 )
 556 {
 557         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 558         backend_db_insert(be, idx);
 559 }
 560
 561 BackendDB *
 562 backend_db_init(
 563     const char  *type,
 564         BackendDB *b0,
 565         int idx,
 566         ConfigReply *cr)
 567 {
 568         BackendInfo *bi = backend_info(type);
 569         BackendDB *be = b0;
 570         int     rc = 0;
 571
 572         if( bi == NULL ) {
 573                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 574                 return NULL;
 575         }
 576
 577         /* If be is provided, treat it as private. Otherwise allocate
 578          * one and add it to the global list.
 579          */
 580         if ( !be ) {
 581                 be = ch_calloc( 1, sizeof(Backend) );
 582                 /* Just append */
 583                 if ( idx >= nbackends )
 584                         idx = -1;
 585                 nbackends++;
 586                 backend_db_insert( be, idx );
 587         }
 588
 589         be->bd_info = bi;
 590         be->bd_self = be;
 591
 592         be->be_def_limit = frontendDB->be_def_limit;
 593         be->be_dfltaccess = frontendDB->be_dfltaccess;
 594
 595         be->be_restrictops = frontendDB->be_restrictops;
 596         be->be_requires = frontendDB->be_requires;
 597         be->be_ssf_set = frontendDB->be_ssf_set;
 598
 599         ldap_pvt_thread_mutex_init( &be->be_pcl_mutex );
 600
 601         /* assign a default depth limit for alias deref */
 602         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 603
 604         if ( bi->bi_db_init ) {
 605                 rc = bi->bi_db_init( be, cr );
 606         }
 607
 608         if ( rc != 0 ) {
 609                 fprintf( stderr, "database init failed (%s)\n", type );
 610                 /* If we created and linked this be, remove it and free it */
 611                 if ( !b0 ) {
 612                         LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next);
 613                         ch_free( be );
 614                         be = NULL;
 615                         nbackends--;
 616                 }
 617         } else {
 618                 bi->bi_nDB++;
 619         }
 620         return( be );
 621 }
 622
 623 void
 624 be_db_close( void )
 625 {
 626         BackendDB *be;
 627
 628         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 629                 if ( be->bd_info->bi_db_close ) {
 630                         be->bd_info->bi_db_close( be, NULL );
 631                 }
 632         }
 633
 634         if ( frontendDB->bd_info->bi_db_close ) {
 635                 frontendDB->bd_info->bi_db_close( frontendDB, NULL );
 636         }
 637
 638 }
 639
 640 Backend *
 641 select_backend(
 642         struct berval * dn,
 643         int noSubs )
 644 {
 645         int             j;
 646         ber_len_t       len, dnlen = dn->bv_len;
 647         Backend         *be;
 648
 649         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 650                 if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) {
 651                         continue;
 652                 }
 653
 654                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 655                 {
 656                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 657                         {
 658                                 continue;
 659                         }
 660
 661                         len = be->be_nsuffix[j].bv_len;
 662
 663                         if ( len > dnlen ) {
 664                                 /* suffix is longer than DN */
 665                                 continue;
 666                         }
 667
 668                         /*
 669                          * input DN is normalized, so the separator check
 670                          * need not look at escaping
 671                          */
 672                         if ( len && len < dnlen &&
 673                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 674                         {
 675                                 continue;
 676                         }
 677
 678                         if ( strcmp( be->be_nsuffix[j].bv_val,
 679                                 &dn->bv_val[dnlen-len] ) == 0 )
 680                         {
 681                                 return be;
 682                         }
 683                 }
 684         }
 685
 686         return be;
 687 }
 688
 689 int
 690 be_issuffix(
 691     Backend *be,
 692     struct berval *bvsuffix )
 693 {
 694         int     i;
 695
 696         if ( be->be_nsuffix == NULL ) {
 697                 return 0;
 698         }
 699
 700         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 701                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 702                         return 1;
 703                 }
 704         }
 705
 706         return 0;
 707 }
 708
 709 int
 710 be_issubordinate(
 711     Backend *be,
 712     struct berval *bvsubordinate )
 713 {
 714         int     i;
 715
 716         if ( be->be_nsuffix == NULL ) {
 717                 return 0;
 718         }
 719
 720         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 721                 if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) {
 722                         return 1;
 723                 }
 724         }
 725
 726         return 0;
 727 }
 728
 729 int
 730 be_isroot_dn( Backend *be, struct berval *ndn )
 731 {
 732         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 733                 return 0;
 734         }
 735
 736         return dn_match( &be->be_rootndn, ndn );
 737 }
 738
 739 int
 740 be_slurp_update( Operation *op )
 741 {
 742         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 743                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 744 }
 745
 746 int
 747 be_shadow_update( Operation *op )
 748 {
 749         /* This assumes that all internal ops (connid == -1) on a syncrepl
 750          * database are syncrepl operations.
 751          */
 752         return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) ||
 753                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 754 }
 755
 756 int
 757 be_isupdate_dn( Backend *be, struct berval *ndn )
 758 {
 759         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 760                 return 0;
 761         }
 762
 763         return dn_match( &be->be_update_ndn, ndn );
 764 }
 765
 766 struct berval *
 767 be_root_dn( Backend *be )
 768 {
 769         return &be->be_rootdn;
 770 }
 771
 772 int
 773 be_isroot( Operation *op )
 774 {
 775         return be_isroot_dn( op->o_bd, &op->o_ndn );
 776 }
 777
 778 int
 779 be_isroot_pw( Operation *op )
 780 {
 781         return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS;
 782 }
 783
 784 /*
 785  * checks if binding as rootdn
 786  *
 787  * return value:
 788  *      SLAP_CB_CONTINUE                if not the rootdn, or if rootpw is null
 789  *      LDAP_SUCCESS                    if rootdn & rootpw
 790  *      LDAP_INVALID_CREDENTIALS        if rootdn & !rootpw
 791  *
 792  * if rs != NULL
 793  *      if LDAP_SUCCESS, op->orb_edn is set
 794  *      if LDAP_INVALID_CREDENTIALS, response is sent to client
 795  */
 796 int
 797 be_rootdn_bind( Operation *op, SlapReply *rs )
 798 {
 799         int             rc;
 800 #ifdef SLAPD_SPASSWD
 801         void    *old_authctx = NULL;
 802 #endif
 803
 804         assert( op->o_tag == LDAP_REQ_BIND );
 805         assert( op->orb_method == LDAP_AUTH_SIMPLE );
 806
 807         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 808                 return SLAP_CB_CONTINUE;
 809         }
 810
 811         if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) {
 812                 /* give the database a chance */
 813                 return SLAP_CB_CONTINUE;
 814         }
 815
 816         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 817                 /* rootdn bind explicitly disallowed */
 818                 rc = LDAP_INVALID_CREDENTIALS;
 819                 if ( rs ) {
 820                         goto send_result;
 821                 }
 822
 823                 return rc;
 824         }
 825
 826 #ifdef SLAPD_SPASSWD
 827         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 828                 op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL );
 829 #endif
 830
 831         rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 832
 833 #ifdef SLAPD_SPASSWD
 834         ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind,
 835                 old_authctx, 0, NULL, NULL );
 836 #endif
 837
 838         rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS );
 839         if ( rs ) {
 840 send_result:;
 841                 rs->sr_err = rc;
 842
 843                 Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n",
 844                         op->o_log_prefix, op->o_bd->be_rootdn.bv_val,
 845                         rc == LDAP_SUCCESS ? " succeeded" : " failed" );
 846
 847                 if ( rc == LDAP_SUCCESS ) {
 848                         /* Set to the pretty rootdn */
 849                         ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn );
 850
 851                 } else {
 852                         send_ldap_result( op, rs );
 853                 }
 854         }
 855
 856         return rc;
 857 }
 858
 859 int
 860 be_entry_release_rw(
 861         Operation *op,
 862         Entry *e,
 863         int rw )
 864 {
 865         if ( op->o_bd->be_release ) {
 866                 /* free and release entry from backend */
 867                 return op->o_bd->be_release( op, e, rw );
 868         } else {
 869                 /* free entry */
 870                 entry_free( e );
 871                 return 0;
 872         }
 873 }
 874
 875 int
 876 backend_unbind( Operation *op, SlapReply *rs )
 877 {
 878         BackendDB *be;
 879
 880         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 881                 if ( be->be_unbind ) {
 882                         op->o_bd = be;
 883                         be->be_unbind( op, rs );
 884                 }
 885         }
 886
 887         return 0;
 888 }
 889
 890 int
 891 backend_connection_init(
 892         Connection   *conn )
 893 {
 894         BackendDB *be;
 895
 896         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 897                 if ( be->be_connection_init ) {
 898                         be->be_connection_init( be, conn );
 899                 }
 900         }
 901
 902         return 0;
 903 }
 904
 905 int
 906 backend_connection_destroy(
 907         Connection   *conn )
 908 {
 909         BackendDB *be;
 910
 911         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 912                 if ( be->be_connection_destroy ) {
 913                         be->be_connection_destroy( be, conn);
 914                 }
 915         }
 916
 917         return 0;
 918 }
 919
 920 int
 921 backend_check_controls(
 922         Operation *op,
 923         SlapReply *rs )
 924 {
 925         LDAPControl **ctrls = op->o_ctrls;
 926         rs->sr_err = LDAP_SUCCESS;
 927
 928         if( ctrls ) {
 929                 for( ; *ctrls != NULL ; ctrls++ ) {
 930                         int cid;
 931
 932                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 933                         case LDAP_CONTROL_NOT_FOUND:
 934                                 /* unrecognized control */
 935                                 if ( (*ctrls)->ldctl_iscritical ) {
 936                                         /* should not be reachable */
 937                                         Debug( LDAP_DEBUG_ANY, "backend_check_controls: "
 938                                                 "unrecognized critical control: %s\n",
 939                                                 (*ctrls)->ldctl_oid, 0, 0 );
 940                                         assert( 0 );
 941                                 } else {
 942                                         Debug( LDAP_DEBUG_TRACE, "backend_check_controls: "
 943                                                 "unrecognized non-critical control: %s\n",
 944                                                 (*ctrls)->ldctl_oid, 0, 0 );
 945                                 }
 946                                 break;
 947
 948                         case LDAP_COMPARE_FALSE:
 949                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 950 #ifdef SLAP_CONTROL_X_WHATFAILED
 951                                         if ( get_whatFailed( op ) ) {
 952                                                 char *oids[ 2 ] = { (*ctrls)->ldctl_oid, NULL };
 953                                                 slap_ctrl_whatFailed_add( op, rs, oids );
 954                                         }
 955 #endif
 956                                         /* RFC 4511 allows unavailableCriticalExtension to be
 957                                          * returned when the server is unwilling to perform
 958                                          * an operation extended by a recognized critical
 959                                          * control.
 960                                          */
 961                                         rs->sr_text = "critical control unavailable in context";
 962                                         rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 963                                         goto done;
 964                                 }
 965                                 break;
 966
 967                         case LDAP_COMPARE_TRUE:
 968                                 break;
 969
 970                         default:
 971                                 /* unreachable */
 972                                 Debug( LDAP_DEBUG_ANY,
 973                                         "backend_check_controls: unable to check control: %s\n",
 974                                         (*ctrls)->ldctl_oid, 0, 0 );
 975                                 assert( 0 );
 976
 977                                 rs->sr_text = "unable to check control";
 978                                 rs->sr_err = LDAP_OTHER;
 979                                 goto done;
 980                         }
 981                 }
 982         }
 983
 984 #if 0 /* temporarily removed */
 985         /* check should be generalized */
 986         if( get_relax(op) && !be_isroot(op)) {
 987                 rs->sr_text = "requires manager authorization";
 988                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 989         }
 990 #endif
 991
 992 done:;
 993         return rs->sr_err;
 994 }
 995
 996 int
 997 backend_check_restrictions(
 998         Operation *op,
 999         SlapReply *rs,
1000         struct berval *opdata )
1001 {
1002         slap_mask_t restrictops;
1003         slap_mask_t requires;
1004         slap_mask_t opflag;
1005         slap_mask_t exopflag = 0;
1006         slap_ssf_set_t *ssf;
1007         int updateop = 0;
1008         int starttls = 0;
1009         int session = 0;
1010
1011         if ( op->o_bd ) {
1012                 int     rc = SLAP_CB_CONTINUE;
1013
1014                 if ( op->o_bd->be_chk_controls ) {
1015                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
1016                 }
1017
1018                 if ( rc == SLAP_CB_CONTINUE ) {
1019                         rc = backend_check_controls( op, rs );
1020                 }
1021
1022                 if ( rc != LDAP_SUCCESS ) {
1023                         return rs->sr_err;
1024                 }
1025
1026                 restrictops = op->o_bd->be_restrictops;
1027                 requires = op->o_bd->be_requires;
1028                 ssf = &op->o_bd->be_ssf_set;
1029
1030         } else {
1031                 restrictops = frontendDB->be_restrictops;
1032                 requires = frontendDB->be_requires;
1033                 ssf = &frontendDB->be_ssf_set;
1034         }
1035
1036         switch( op->o_tag ) {
1037         case LDAP_REQ_ADD:
1038                 opflag = SLAP_RESTRICT_OP_ADD;
1039                 updateop++;
1040                 break;
1041         case LDAP_REQ_BIND:
1042                 opflag = SLAP_RESTRICT_OP_BIND;
1043                 session++;
1044                 break;
1045         case LDAP_REQ_COMPARE:
1046                 opflag = SLAP_RESTRICT_OP_COMPARE;
1047                 break;
1048         case LDAP_REQ_DELETE:
1049                 updateop++;
1050                 opflag = SLAP_RESTRICT_OP_DELETE;
1051                 break;
1052         case LDAP_REQ_EXTENDED:
1053                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1054
1055                 if( !opdata ) {
1056                         /* treat unspecified as a modify */
1057                         opflag = SLAP_RESTRICT_OP_MODIFY;
1058                         updateop++;
1059                         break;
1060                 }
1061
1062                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1063                         session++;
1064                         starttls++;
1065                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1066                         break;
1067                 }
1068
1069                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1070                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1071                         break;
1072                 }
1073
1074                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1075                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1076                         break;
1077                 }
1078
1079                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1080                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1081                         updateop++;
1082                         break;
1083                 }
1084
1085                 /* treat everything else as a modify */
1086                 opflag = SLAP_RESTRICT_OP_MODIFY;
1087                 updateop++;
1088                 break;
1089
1090         case LDAP_REQ_MODIFY:
1091                 updateop++;
1092                 opflag = SLAP_RESTRICT_OP_MODIFY;
1093                 break;
1094         case LDAP_REQ_RENAME:
1095                 updateop++;
1096                 opflag = SLAP_RESTRICT_OP_RENAME;
1097                 break;
1098         case LDAP_REQ_SEARCH:
1099                 opflag = SLAP_RESTRICT_OP_SEARCH;
1100                 break;
1101         case LDAP_REQ_UNBIND:
1102                 session++;
1103                 opflag = 0;
1104                 break;
1105         default:
1106                 rs->sr_text = "restrict operations internal error";
1107                 rs->sr_err = LDAP_OTHER;
1108                 return rs->sr_err;
1109         }
1110
1111         if ( !starttls ) {
1112                 /* these checks don't apply to StartTLS */
1113
1114                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1115                 if( op->o_transport_ssf < ssf->sss_transport ) {
1116                         rs->sr_text = op->o_transport_ssf
1117                                 ? "stronger transport confidentiality required"
1118                                 : "transport confidentiality required";
1119                         return rs->sr_err;
1120                 }
1121
1122                 if( op->o_tls_ssf < ssf->sss_tls ) {
1123                         rs->sr_text = op->o_tls_ssf
1124                                 ? "stronger TLS confidentiality required"
1125                                 : "TLS confidentiality required";
1126                         return rs->sr_err;
1127                 }
1128
1129
1130                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1131                         /* simple bind specific check */
1132                         if( op->o_ssf < ssf->sss_simple_bind ) {
1133                                 rs->sr_text = op->o_ssf
1134                                         ? "stronger confidentiality required"
1135                                         : "confidentiality required";
1136                                 return rs->sr_err;
1137                         }
1138                 }
1139
1140                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1141                         /* these checks don't apply to SASL bind */
1142
1143                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1144                                 rs->sr_text = op->o_sasl_ssf
1145                                         ? "stronger SASL confidentiality required"
1146                                         : "SASL confidentiality required";
1147                                 return rs->sr_err;
1148                         }
1149
1150                         if( op->o_ssf < ssf->sss_ssf ) {
1151                                 rs->sr_text = op->o_ssf
1152                                         ? "stronger confidentiality required"
1153                                         : "confidentiality required";
1154                                 return rs->sr_err;
1155                         }
1156                 }
1157
1158                 if( updateop ) {
1159                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1160                                 rs->sr_text = op->o_transport_ssf
1161                                         ? "stronger transport confidentiality required for update"
1162                                         : "transport confidentiality required for update";
1163                                 return rs->sr_err;
1164                         }
1165
1166                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1167                                 rs->sr_text = op->o_tls_ssf
1168                                         ? "stronger TLS confidentiality required for update"
1169                                         : "TLS confidentiality required for update";
1170                                 return rs->sr_err;
1171                         }
1172
1173                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1174                                 rs->sr_text = op->o_sasl_ssf
1175                                         ? "stronger SASL confidentiality required for update"
1176                                         : "SASL confidentiality required for update";
1177                                 return rs->sr_err;
1178                         }
1179
1180                         if( op->o_ssf < ssf->sss_update_ssf ) {
1181                                 rs->sr_text = op->o_ssf
1182                                         ? "stronger confidentiality required for update"
1183                                         : "confidentiality required for update";
1184                                 return rs->sr_err;
1185                         }
1186
1187                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1188                                 BER_BVISEMPTY( &op->o_ndn ) )
1189                         {
1190                                 rs->sr_text = "modifications require authentication";
1191                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1192                                 return rs->sr_err;
1193                         }
1194
1195 #ifdef SLAP_X_LISTENER_MOD
1196                         if ( op->o_conn->c_listener &&
1197                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1198                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1199                         {
1200                                 /* no "w" mode means readonly */
1201                                 rs->sr_text = "modifications not allowed on this listener";
1202                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1203                                 return rs->sr_err;
1204                         }
1205 #endif /* SLAP_X_LISTENER_MOD */
1206                 }
1207         }
1208
1209         if ( !session ) {
1210                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1211
1212                 if( requires & SLAP_REQUIRE_STRONG ) {
1213                         /* should check mechanism */
1214                         if( ( op->o_transport_ssf < ssf->sss_transport
1215                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1216                                 || BER_BVISEMPTY( &op->o_dn ) )
1217                         {
1218                                 rs->sr_text = "strong(er) authentication required";
1219                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1220                                 return rs->sr_err;
1221                         }
1222                 }
1223
1224                 if( requires & SLAP_REQUIRE_SASL ) {
1225                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1226                                 rs->sr_text = "SASL authentication required";
1227                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1228                                 return rs->sr_err;
1229                         }
1230                 }
1231
1232                 if( requires & SLAP_REQUIRE_AUTHC ) {
1233                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1234                                 rs->sr_text = "authentication required";
1235                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1236                                 return rs->sr_err;
1237                         }
1238                 }
1239
1240                 if( requires & SLAP_REQUIRE_BIND ) {
1241                         int version;
1242                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1243                         version = op->o_conn->c_protocol;
1244                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1245
1246                         if( !version ) {
1247                                 /* no bind has occurred */
1248                                 rs->sr_text = "BIND required";
1249                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1250                                 return rs->sr_err;
1251                         }
1252                 }
1253
1254                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1255                         if( op->o_protocol < LDAP_VERSION3 ) {
1256                                 /* no bind has occurred */
1257                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1258                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1259                                 return rs->sr_err;
1260                         }
1261                 }
1262
1263 #ifdef SLAP_X_LISTENER_MOD
1264                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1265                         if ( op->o_conn->c_listener &&
1266                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1267                 {
1268                                 /* no "x" mode means bind required */
1269                                 rs->sr_text = "bind required on this listener";
1270                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1271                                 return rs->sr_err;
1272                         }
1273                 }
1274
1275                 if ( !starttls && !updateop ) {
1276                         if ( op->o_conn->c_listener &&
1277                                 !( op->o_conn->c_listener->sl_perms &
1278                                         ( !BER_BVISEMPTY( &op->o_dn )
1279                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1280                         {
1281                                 /* no "r" mode means no read */
1282                                 rs->sr_text = "read not allowed on this listener";
1283                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1284                                 return rs->sr_err;
1285                         }
1286                 }
1287 #endif /* SLAP_X_LISTENER_MOD */
1288
1289         }
1290
1291         if( ( restrictops & opflag )
1292                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1293                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1294                         rs->sr_text = "read operations restricted";
1295                 } else if ( restrictops & exopflag ) {
1296                         rs->sr_text = "extended operation restricted";
1297                 } else {
1298                         rs->sr_text = "operation restricted";
1299                 }
1300                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1301                 return rs->sr_err;
1302         }
1303
1304         rs->sr_err = LDAP_SUCCESS;
1305         return rs->sr_err;
1306 }
1307
1308 int backend_check_referrals( Operation *op, SlapReply *rs )
1309 {
1310         rs->sr_err = LDAP_SUCCESS;
1311
1312         if( op->o_bd->be_chk_referrals ) {
1313                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1314
1315                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1316                         send_ldap_result( op, rs );
1317                 }
1318         }
1319
1320         return rs->sr_err;
1321 }
1322
1323 int
1324 be_entry_get_rw(
1325         Operation *op,
1326         struct berval *ndn,
1327         ObjectClass *oc,
1328         AttributeDescription *at,
1329         int rw,
1330         Entry **e )
1331 {
1332         *e = NULL;
1333
1334         if ( op->o_bd == NULL ) {
1335                 return LDAP_NO_SUCH_OBJECT;
1336         }
1337
1338         if ( op->o_bd->be_fetch ) {
1339                 return op->o_bd->be_fetch( op, ndn, oc, at, rw, e );
1340         }
1341
1342         return LDAP_UNWILLING_TO_PERFORM;
1343 }
1344
1345 int
1346 fe_acl_group(
1347         Operation *op,
1348         Entry   *target,
1349         struct berval *gr_ndn,
1350         struct berval *op_ndn,
1351         ObjectClass *group_oc,
1352         AttributeDescription *group_at )
1353 {
1354         Entry *e;
1355         void *o_priv = op->o_private, *e_priv = NULL;
1356         Attribute *a;
1357         int rc;
1358         GroupAssertion *g;
1359         Backend *be = op->o_bd;
1360         OpExtra         *oex;
1361
1362         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1363                 if ( oex->oe_key == (void *)backend_group )
1364                         break;
1365         }
1366
1367         if ( oex && ((OpExtraDB *)oex)->oe_db )
1368                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1369
1370         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1371                 op->o_bd = select_backend( gr_ndn, 0 );
1372
1373         for ( g = op->o_groups; g; g = g->ga_next ) {
1374                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1375                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1376                 {
1377                         continue;
1378                 }
1379                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1380                         break;
1381                 }
1382         }
1383
1384         if ( g ) {
1385                 rc = g->ga_res;
1386                 goto done;
1387         }
1388
1389         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1390                 e = target;
1391                 rc = 0;
1392
1393         } else {
1394                 op->o_private = NULL;
1395                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1396                 e_priv = op->o_private;
1397                 op->o_private = o_priv;
1398         }
1399
1400         if ( e ) {
1401                 a = attr_find( e->e_attrs, group_at );
1402                 if ( a ) {
1403                         /* If the attribute is a subtype of labeledURI,
1404                          * treat this as a dynamic group ala groupOfURLs
1405                          */
1406                         if ( is_at_subtype( group_at->ad_type,
1407                                 slap_schema.si_ad_labeledURI->ad_type ) )
1408                         {
1409                                 int i;
1410                                 LDAPURLDesc *ludp;
1411                                 struct berval bv, nbase;
1412                                 Filter *filter;
1413                                 Entry *user = NULL;
1414                                 void *user_priv = NULL;
1415                                 Backend *b2 = op->o_bd;
1416
1417                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1418                                         user = target;
1419                                 }
1420
1421                                 rc = LDAP_COMPARE_FALSE;
1422                                 for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1423                                         if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1424                                                 LDAP_URL_SUCCESS )
1425                                         {
1426                                                 continue;
1427                                         }
1428
1429                                         BER_BVZERO( &nbase );
1430
1431                                         /* host, attrs and extensions parts must be empty */
1432                                         if ( ( ludp->lud_host && *ludp->lud_host )
1433                                                 || ludp->lud_attrs
1434                                                 || ludp->lud_exts )
1435                                         {
1436                                                 goto loopit;
1437                                         }
1438
1439                                         ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1440                                         if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1441                                                 op->o_tmpmemctx ) != LDAP_SUCCESS )
1442                                         {
1443                                                 goto loopit;
1444                                         }
1445
1446                                         switch ( ludp->lud_scope ) {
1447                                         case LDAP_SCOPE_BASE:
1448                                                 if ( !dn_match( &nbase, op_ndn ) ) {
1449                                                         goto loopit;
1450                                                 }
1451                                                 break;
1452                                         case LDAP_SCOPE_ONELEVEL:
1453                                                 dnParent( op_ndn, &bv );
1454                                                 if ( !dn_match( &nbase, &bv ) ) {
1455                                                         goto loopit;
1456                                                 }
1457                                                 break;
1458                                         case LDAP_SCOPE_SUBTREE:
1459                                                 if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1460                                                         goto loopit;
1461                                                 }
1462                                                 break;
1463                                         case LDAP_SCOPE_SUBORDINATE:
1464                                                 if ( dn_match( &nbase, op_ndn ) ||
1465                                                         !dnIsSuffix( op_ndn, &nbase ) )
1466                                                 {
1467                                                         goto loopit;
1468                                                 }
1469                                         }
1470
1471                                         /* NOTE: this could be NULL
1472                                          * if no filter is provided,
1473                                          * or if filter parsing fails.
1474                                          * In the latter case,
1475                                          * we should give up. */
1476                                         if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') {
1477                                                 filter = str2filter_x( op, ludp->lud_filter );
1478                                                 if ( filter == NULL ) {
1479                                                         /* give up... */
1480                                                         rc = LDAP_OTHER;
1481                                                         goto loopit;
1482                                                 }
1483
1484                                                 /* only get user if required
1485                                                  * and not available yet */
1486                                                 if ( user == NULL ) {
1487                                                         int rc2;
1488
1489                                                         op->o_bd = select_backend( op_ndn, 0 );
1490                                                         op->o_private = NULL;
1491                                                         rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user );
1492                                                         user_priv = op->o_private;
1493                                                         op->o_private = o_priv;
1494                                                         if ( rc2 != 0 ) {
1495                                                                 /* give up... */
1496                                                                 rc = LDAP_OTHER;
1497                                                                 goto loopit;
1498                                                         }
1499                                                 }
1500
1501                                                 if ( test_filter( NULL, user, filter ) ==
1502                                                         LDAP_COMPARE_TRUE )
1503                                                 {
1504                                                         rc = 0;
1505                                                 }
1506                                                 filter_free_x( op, filter, 1 );
1507                                         }
1508 loopit:
1509                                         ldap_free_urldesc( ludp );
1510                                         if ( !BER_BVISNULL( &nbase ) ) {
1511                                                 op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1512                                         }
1513                                         if ( rc != LDAP_COMPARE_FALSE ) {
1514                                                 break;
1515                                         }
1516                                 }
1517
1518                                 if ( user != NULL && user != target ) {
1519                                         op->o_private = user_priv;
1520                                         be_entry_release_r( op, user );
1521                                         op->o_private = o_priv;
1522                                 }
1523                                 op->o_bd = b2;
1524
1525                         } else {
1526                                 rc = attr_valfind( a,
1527                                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1528                                         SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1529                                         op_ndn, NULL, op->o_tmpmemctx );
1530                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) {
1531                                         rc = LDAP_COMPARE_FALSE;
1532                                 }
1533                         }
1534
1535                 } else {
1536                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1537                 }
1538
1539                 if ( e != target ) {
1540                         op->o_private = e_priv;
1541                         be_entry_release_r( op, e );
1542                         op->o_private = o_priv;
1543                 }
1544
1545         } else {
1546                 rc = LDAP_NO_SUCH_OBJECT;
1547         }
1548
1549         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1550                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1551                         op->o_tmpmemctx );
1552                 g->ga_be = op->o_bd;
1553                 g->ga_oc = group_oc;
1554                 g->ga_at = group_at;
1555                 g->ga_res = rc;
1556                 g->ga_len = gr_ndn->bv_len;
1557                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1558                 g->ga_next = op->o_groups;
1559                 op->o_groups = g;
1560         }
1561
1562 done:
1563         op->o_bd = be;
1564         return rc;
1565 }
1566
1567 int
1568 backend_group(
1569         Operation *op,
1570         Entry   *target,
1571         struct berval *gr_ndn,
1572         struct berval *op_ndn,
1573         ObjectClass *group_oc,
1574         AttributeDescription *group_at )
1575 {
1576         int                     rc;
1577         BackendDB *be_orig;
1578         OpExtraDB       oex;
1579
1580         if ( op->o_abandon ) {
1581                 return SLAPD_ABANDON;
1582         }
1583
1584         oex.oe_db = op->o_bd;
1585         oex.oe.oe_key = (void *)backend_group;
1586         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1587
1588         be_orig = op->o_bd;
1589         op->o_bd = frontendDB;
1590         rc = frontendDB->be_group( op, target, gr_ndn,
1591                 op_ndn, group_oc, group_at );
1592         op->o_bd = be_orig;
1593         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1594
1595         return rc;
1596 }
1597
1598 int
1599 fe_acl_attribute(
1600         Operation *op,
1601         Entry   *target,
1602         struct berval   *edn,
1603         AttributeDescription *entry_at,
1604         BerVarray *vals,
1605         slap_access_t access )
1606 {
1607         Entry                   *e = NULL;
1608         void                    *o_priv = op->o_private, *e_priv = NULL;
1609         Attribute               *a = NULL;
1610         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1611         AccessControlState      acl_state = ACL_STATE_INIT;
1612         Backend                 *be = op->o_bd;
1613         OpExtra         *oex;
1614
1615         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1616                 if ( oex->oe_key == (void *)backend_attribute )
1617                         break;
1618         }
1619
1620         if ( oex && ((OpExtraDB *)oex)->oe_db )
1621                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1622
1623         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1624                 op->o_bd = select_backend( edn, 0 );
1625
1626         if ( target && dn_match( &target->e_nname, edn ) ) {
1627                 e = target;
1628
1629         } else {
1630                 op->o_private = NULL;
1631                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1632                 e_priv = op->o_private;
1633                 op->o_private = o_priv;
1634         }
1635
1636         if ( e ) {
1637                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) {
1638                         assert( vals == NULL );
1639
1640                         rc = LDAP_SUCCESS;
1641                         if ( op->o_conn && access > ACL_NONE &&
1642                                 access_allowed( op, e, entry_at, NULL,
1643                                                 access, &acl_state ) == 0 )
1644                         {
1645                                 rc = LDAP_INSUFFICIENT_ACCESS;
1646                         }
1647                         goto freeit;
1648                 }
1649
1650                 a = attr_find( e->e_attrs, entry_at );
1651                 if ( a == NULL ) {
1652                         SlapReply       rs = { 0 };
1653                         AttributeName   anlist[ 2 ];
1654
1655                         anlist[ 0 ].an_name = entry_at->ad_cname;
1656                         anlist[ 0 ].an_desc = entry_at;
1657                         BER_BVZERO( &anlist[ 1 ].an_name );
1658                         rs.sr_attrs = anlist;
1659
1660                         /* NOTE: backend_operational() is also called
1661                          * when returning results, so it's supposed
1662                          * to do no harm to entries */
1663                         rs.sr_entry = e;
1664                         rc = backend_operational( op, &rs );
1665                         rs.sr_entry = NULL;
1666
1667                         if ( rc == LDAP_SUCCESS ) {
1668                                 if ( rs.sr_operational_attrs ) {
1669                                         freeattr = 1;
1670                                         a = rs.sr_operational_attrs;
1671
1672                                 } else {
1673                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1674                                 }
1675                         }
1676                 }
1677
1678                 if ( a ) {
1679                         BerVarray v;
1680
1681                         if ( op->o_conn && access > ACL_NONE &&
1682                                 access_allowed( op, e, entry_at, NULL,
1683                                                 access, &acl_state ) == 0 )
1684                         {
1685                                 rc = LDAP_INSUFFICIENT_ACCESS;
1686                                 goto freeit;
1687                         }
1688
1689                         i = a->a_numvals;
1690                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1691                                 op->o_tmpmemctx );
1692                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1693                         {
1694                                 if ( op->o_conn && access > ACL_NONE &&
1695                                         access_allowed( op, e, entry_at,
1696                                                         &a->a_nvals[i],
1697                                                         access,
1698                                                         &acl_state ) == 0 )
1699                                 {
1700                                         continue;
1701                                 }
1702                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1703                                                 op->o_tmpmemctx );
1704                                 if ( !BER_BVISNULL( &v[j] ) ) {
1705                                         j++;
1706                                 }
1707                         }
1708                         if ( j == 0 ) {
1709                                 op->o_tmpfree( v, op->o_tmpmemctx );
1710                                 *vals = NULL;
1711                                 rc = LDAP_INSUFFICIENT_ACCESS;
1712
1713                         } else {
1714                                 BER_BVZERO( &v[j] );
1715                                 *vals = v;
1716                                 rc = LDAP_SUCCESS;
1717                         }
1718                 }
1719 freeit:         if ( e != target ) {
1720                         op->o_private = e_priv;
1721                         be_entry_release_r( op, e );
1722                         op->o_private = o_priv;
1723                 }
1724                 if ( freeattr ) {
1725                         attr_free( a );
1726                 }
1727         }
1728
1729         op->o_bd = be;
1730         return rc;
1731 }
1732
1733 int
1734 backend_attribute(
1735         Operation *op,
1736         Entry   *target,
1737         struct berval   *edn,
1738         AttributeDescription *entry_at,
1739         BerVarray *vals,
1740         slap_access_t access )
1741 {
1742         int                     rc;
1743         BackendDB *be_orig;
1744         OpExtraDB       oex;
1745
1746         oex.oe_db = op->o_bd;
1747         oex.oe.oe_key = (void *)backend_attribute;
1748         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1749
1750         be_orig = op->o_bd;
1751         op->o_bd = frontendDB;
1752         rc = frontendDB->be_attribute( op, target, edn,
1753                 entry_at, vals, access );
1754         op->o_bd = be_orig;
1755         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1756
1757         return rc;
1758 }
1759
1760 int
1761 backend_access(
1762         Operation               *op,
1763         Entry                   *target,
1764         struct berval           *edn,
1765         AttributeDescription    *entry_at,
1766         struct berval           *nval,
1767         slap_access_t           access,
1768         slap_mask_t             *mask )
1769 {
1770         Entry           *e = NULL;
1771         void            *o_priv = op->o_private, *e_priv = NULL;
1772         int             rc = LDAP_INSUFFICIENT_ACCESS;
1773         Backend         *be = op->o_bd;
1774
1775         /* pedantic */
1776         assert( op != NULL );
1777         assert( op->o_conn != NULL );
1778         assert( edn != NULL );
1779         assert( access > ACL_NONE );
1780
1781         if ( !op->o_bd ) {
1782                 op->o_bd = select_backend( edn, 0 );
1783         }
1784
1785         if ( target && dn_match( &target->e_nname, edn ) ) {
1786                 e = target;
1787
1788         } else {
1789                 op->o_private = NULL;
1790                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1791                 e_priv = op->o_private;
1792                 op->o_private = o_priv;
1793         }
1794
1795         if ( e ) {
1796                 Attribute       *a = NULL;
1797                 int             freeattr = 0;
1798
1799                 if ( entry_at == NULL ) {
1800                         entry_at = slap_schema.si_ad_entry;
1801                 }
1802
1803                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1804                 {
1805                         if ( access_allowed_mask( op, e, entry_at,
1806                                         NULL, access, NULL, mask ) == 0 )
1807                         {
1808                                 rc = LDAP_INSUFFICIENT_ACCESS;
1809
1810                         } else {
1811                                 rc = LDAP_SUCCESS;
1812                         }
1813
1814                 } else {
1815                         a = attr_find( e->e_attrs, entry_at );
1816                         if ( a == NULL ) {
1817                                 SlapReply       rs = { 0 };
1818                                 AttributeName   anlist[ 2 ];
1819
1820                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1821                                 anlist[ 0 ].an_desc = entry_at;
1822                                 BER_BVZERO( &anlist[ 1 ].an_name );
1823                                 rs.sr_attrs = anlist;
1824
1825                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1826
1827                                 /* NOTE: backend_operational() is also called
1828                                  * when returning results, so it's supposed
1829                                  * to do no harm to entries */
1830                                 rs.sr_entry = e;
1831                                 rc = backend_operational( op, &rs );
1832                                 rs.sr_entry = NULL;
1833
1834                                 if ( rc == LDAP_SUCCESS ) {
1835                                         if ( rs.sr_operational_attrs ) {
1836                                                 freeattr = 1;
1837                                                 a = rs.sr_operational_attrs;
1838
1839                                         } else {
1840                                                 rc = LDAP_NO_SUCH_OBJECT;
1841                                         }
1842                                 }
1843                         }
1844
1845                         if ( a ) {
1846                                 if ( access_allowed_mask( op, e, entry_at,
1847                                                 nval, access, NULL, mask ) == 0 )
1848                                 {
1849                                         rc = LDAP_INSUFFICIENT_ACCESS;
1850                                         goto freeit;
1851                                 }
1852                                 rc = LDAP_SUCCESS;
1853                         }
1854                 }
1855 freeit:         if ( e != target ) {
1856                         op->o_private = e_priv;
1857                         be_entry_release_r( op, e );
1858                         op->o_private = o_priv;
1859                 }
1860                 if ( freeattr ) {
1861                         attr_free( a );
1862                 }
1863         }
1864
1865         op->o_bd = be;
1866         return rc;
1867 }
1868
1869 int
1870 fe_aux_operational(
1871         Operation *op,
1872         SlapReply *rs )
1873 {
1874         Attribute               **ap;
1875         int                     rc = LDAP_SUCCESS;
1876         BackendDB               *be_orig = op->o_bd;
1877         OpExtra         *oex;
1878
1879         LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) {
1880                 if ( oex->oe_key == (void *)backend_operational )
1881                         break;
1882         }
1883
1884         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1885                 /* just count them */ ;
1886
1887         /*
1888          * If operational attributes (allegedly) are required,
1889          * and the backend supports specific operational attributes,
1890          * add them to the attribute list
1891          */
1892         if ( !( rs->sr_flags & REP_NO_ENTRYDN )
1893                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1894                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) )
1895         {
1896                 *ap = slap_operational_entryDN( rs->sr_entry );
1897                 ap = &(*ap)->a_next;
1898         }
1899
1900         if ( !( rs->sr_flags & REP_NO_SUBSCHEMA)
1901                 && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1902                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) )
1903         {
1904                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1905                 ap = &(*ap)->a_next;
1906         }
1907
1908         /* Let the overlays have a chance at this */
1909         if ( oex && ((OpExtraDB *)oex)->oe_db )
1910                 op->o_bd = ((OpExtraDB *)oex)->oe_db;
1911
1912         if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd ))
1913                 op->o_bd = select_backend( &op->o_req_ndn, 0 );
1914
1915         if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) &&
1916                 ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1917                 op->o_bd->be_operational != NULL )
1918         {
1919                 rc = op->o_bd->be_operational( op, rs );
1920         }
1921         op->o_bd = be_orig;
1922
1923         return rc;
1924 }
1925
1926 int backend_operational( Operation *op, SlapReply *rs )
1927 {
1928         int rc;
1929         BackendDB *be_orig;
1930         OpExtraDB       oex;
1931
1932         oex.oe_db = op->o_bd;
1933         oex.oe.oe_key = (void *)backend_operational;
1934         LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next);
1935
1936         /* Moved this into the frontend so global overlays are called */
1937
1938         be_orig = op->o_bd;
1939         op->o_bd = frontendDB;
1940         rc = frontendDB->be_operational( op, rs );
1941         op->o_bd = be_orig;
1942         LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next);
1943
1944         return rc;
1945 }
1946