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 1998-2005 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 "lutil.h"
  38 #include "lber_pvt.h"
  39
  40 /*
  41  * If a module is configured as dynamic, its header should not
  42  * get included into slapd. While this is a general rule and does
  43  * not have much of an effect in UNIX, this rule should be adhered
  44  * to for Windows, where dynamic object code should not be implicitly
  45  * imported into slapd without appropriate __declspec(dllimport) directives.
  46  */
  47
  48 int                     nBackendInfo = 0;
  49 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  50
  51 int                     nBackendDB = 0;
  52 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  53
  54 static int
  55 backend_init_controls( BackendInfo *bi )
  56 {
  57         if ( bi->bi_controls ) {
  58                 int     i;
  59
  60                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  61                         int     cid;
  62
  63                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  64                                         == LDAP_CONTROL_NOT_FOUND )
  65                         {
  66                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  67                                         assert( 0 );
  68                                 }
  69
  70                                 return -1;
  71                         }
  72
  73                         bi->bi_ctrls[ cid ] = 1;
  74                 }
  75         }
  76
  77         return 0;
  78 }
  79
  80 int backend_init(void)
  81 {
  82         int rc = -1;
  83         BackendInfo *bi;
  84
  85         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  86                 /* already initialized */
  87                 Debug( LDAP_DEBUG_ANY,
  88                         "backend_init: already initialized\n", 0, 0, 0 );
  89                 return -1;
  90         }
  91
  92         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
  93                 assert( bi->bi_init != 0 );
  94
  95                 rc = bi->bi_init( bi );
  96
  97                 if(rc != 0) {
  98                         Debug( LDAP_DEBUG_ANY,
  99                                 "backend_init: initialized for type \"%s\"\n",
 100                                 bi->bi_type, 0, 0 );
 101                         /* destroy those we've already inited */
 102                         for( nBackendInfo--;
 103                                 nBackendInfo >= 0 ;
 104                                 nBackendInfo-- )
 105                         {
 106                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 107                                         slap_binfo[nBackendInfo].bi_destroy(
 108                                                 &slap_binfo[nBackendInfo] );
 109                                 }
 110                         }
 111                         return rc;
 112                 }
 113
 114                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 115         }
 116
 117         if ( nBackendInfo > 0) {
 118                 return 0;
 119         }
 120
 121 #ifdef SLAPD_MODULES
 122         return 0;
 123 #else
 124
 125         Debug( LDAP_DEBUG_ANY,
 126                 "backend_init: failed\n",
 127                 0, 0, 0 );
 128
 129         return rc;
 130 #endif /* SLAPD_MODULES */
 131 }
 132
 133 int backend_add(BackendInfo *aBackendInfo)
 134 {
 135         int rc = 0;
 136
 137         if ( aBackendInfo->bi_init == NULL ) {
 138                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 139                         "backend type \"%s\" does not have the (mandatory)init function\n",
 140                         aBackendInfo->bi_type, 0, 0 );
 141                 return -1;
 142         }
 143
 144         rc = aBackendInfo->bi_init(aBackendInfo);
 145         if ( rc != 0) {
 146                 Debug( LDAP_DEBUG_ANY,
 147                         "backend_add:  initialization for type \"%s\" failed\n",
 148                         aBackendInfo->bi_type, 0, 0 );
 149                 return rc;
 150         }
 151
 152         (void)backend_init_controls( aBackendInfo );
 153
 154         /* now add the backend type to the Backend Info List */
 155         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 156         nBackendInfo++;
 157         return 0;
 158 }
 159
 160 static int
 161 backend_set_controls( BackendDB *be )
 162 {
 163         BackendInfo     *bi = be->bd_info;
 164
 165         /* back-relay takes care of itself; so may do other */
 166         if ( overlay_is_over( be ) ) {
 167                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 168         }
 169
 170         if ( bi->bi_controls ) {
 171                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 172                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 173                                         sizeof( be->be_ctrls ) );
 174                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 175
 176                 } else {
 177                         int     i;
 178
 179                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 180                                 if ( bi->bi_ctrls[ i ] ) {
 181                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 182                                 }
 183                         }
 184                 }
 185
 186         }
 187
 188         return 0;
 189 }
 190
 191 /* startup a specific backend database */
 192 int backend_startup_one(Backend *be)
 193 {
 194         int             rc = 0;
 195
 196         assert( be != NULL );
 197
 198         be->be_pending_csn_list = (struct be_pcl *)
 199                 ch_calloc( 1, sizeof( struct be_pcl ) );
 200
 201         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 202
 203         Debug( LDAP_DEBUG_TRACE,
 204                 "backend_startup_one: starting \"%s\"\n",
 205                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 206                 0, 0 );
 207
 208         /* set database controls */
 209         (void)backend_set_controls( be );
 210
 211         if ( be->bd_info->bi_db_open ) {
 212                 rc = be->bd_info->bi_db_open( be );
 213                 if ( rc == 0 ) {
 214                         (void)backend_set_controls( be );
 215
 216                 } else {
 217                         Debug( LDAP_DEBUG_ANY,
 218                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 219                                 rc, 0, 0 );
 220                 }
 221         }
 222
 223         return rc;
 224 }
 225
 226 int backend_startup(Backend *be)
 227 {
 228         int i;
 229         int rc = 0;
 230         BackendInfo *bi;
 231
 232         if( ! ( nBackendDB > 0 ) ) {
 233                 /* no databases */
 234                 Debug( LDAP_DEBUG_ANY,
 235                         "backend_startup: %d databases to startup.\n",
 236                         nBackendDB, 0, 0 );
 237                 return 1;
 238         }
 239
 240         if(be != NULL) {
 241                 if ( be->bd_info->bi_open ) {
 242                         rc = be->bd_info->bi_open( be->bd_info );
 243                         if ( rc != 0 ) {
 244                                 Debug( LDAP_DEBUG_ANY,
 245                                         "backend_startup: bi_open failed!\n",
 246                                         0, 0, 0 );
 247
 248                                 return rc;
 249                         }
 250                 }
 251
 252                 return backend_startup_one( be );
 253         }
 254
 255         /* open frontend, if required */
 256         if ( frontendDB->bd_info->bi_db_open ) {
 257                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 258                 if ( rc != 0 ) {
 259                         Debug( LDAP_DEBUG_ANY,
 260                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 261                                 rc, 0, 0 );
 262                         return rc;
 263                 }
 264         }
 265
 266         /* open each backend type */
 267         i = -1;
 268         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 269                 i++;
 270                 if( bi->bi_nDB == 0) {
 271                         /* no database of this type, don't open */
 272                         continue;
 273                 }
 274
 275                 if( bi->bi_open ) {
 276                         rc = bi->bi_open( bi );
 277                         if ( rc != 0 ) {
 278                                 Debug( LDAP_DEBUG_ANY,
 279                                         "backend_startup: bi_open %d (%s) failed!\n",
 280                                         i, bi->bi_type, 0 );
 281                                 return rc;
 282                         }
 283                 }
 284
 285                 (void)backend_init_controls( bi );
 286         }
 287
 288         /* open each backend database */
 289         i = -1;
 290         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 291                 i++;
 292                 if ( be->be_suffix == NULL ) {
 293                         Debug( LDAP_DEBUG_ANY,
 294                                 "backend_startup: warning, database %d (%s) "
 295                                 "has no suffix\n",
 296                                 i, be->bd_info->bi_type, 0 );
 297                 }
 298                 /* append global access controls */
 299                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 300
 301                 rc = backend_startup_one( be );
 302
 303                 if ( rc ) return rc;
 304         }
 305
 306         return rc;
 307 }
 308
 309 int backend_num( Backend *be )
 310 {
 311         int i = 0;
 312         BackendDB *b2;
 313
 314         if( be == NULL ) return -1;
 315
 316         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 317                 if( be == b2 ) return i;
 318                 i++;
 319         }
 320         return -1;
 321 }
 322
 323 int backend_shutdown( Backend *be )
 324 {
 325         int rc = 0;
 326         BackendInfo *bi;
 327
 328         if( be != NULL ) {
 329                 /* shutdown a specific backend database */
 330
 331                 if ( be->bd_info->bi_nDB == 0 ) {
 332                         /* no database of this type, we never opened it */
 333                         return 0;
 334                 }
 335
 336                 if ( be->bd_info->bi_db_close ) {
 337                         be->bd_info->bi_db_close( be );
 338                 }
 339
 340                 if( be->bd_info->bi_close ) {
 341                         be->bd_info->bi_close( be->bd_info );
 342                 }
 343
 344                 return 0;
 345         }
 346
 347         /* close each backend database */
 348         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 349                 if ( be->bd_info->bi_db_close ) {
 350                         be->bd_info->bi_db_close( be );
 351                 }
 352
 353                 if(rc != 0) {
 354                         Debug( LDAP_DEBUG_ANY,
 355                                 "backend_close: bi_db_close %s failed!\n",
 356                                 be->be_type, 0, 0 );
 357                 }
 358         }
 359
 360         /* close each backend type */
 361         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 362                 if( bi->bi_nDB == 0 ) {
 363                         /* no database of this type */
 364                         continue;
 365                 }
 366
 367                 if( bi->bi_close ) {
 368                         bi->bi_close( bi );
 369                 }
 370         }
 371
 372         /* close frontend, if required */
 373         if ( frontendDB->bd_info->bi_db_close ) {
 374                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 375                 if ( rc != 0 ) {
 376                         Debug( LDAP_DEBUG_ANY,
 377                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 378                                 rc, 0, 0 );
 379                 }
 380         }
 381
 382         return 0;
 383 }
 384
 385 void backend_destroy_one( BackendDB *bd, int dynamic )
 386 {
 387         if ( dynamic ) {
 388                 LDAP_STAILQ_REMOVE(&backendDB, bd, slap_backend_db, be_next );
 389         }
 390
 391         if ( bd->be_syncinfo ) {
 392                 syncinfo_free( bd->be_syncinfo );
 393         }
 394
 395         if ( bd->be_pending_csn_list ) {
 396                 struct slap_csn_entry *csne;
 397                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 398                 while ( csne ) {
 399                         struct slap_csn_entry *tmp_csne = csne;
 400
 401                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 402                         ch_free( csne->ce_csn.bv_val );
 403                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 404                         ch_free( tmp_csne );
 405                 }
 406                 ch_free( bd->be_pending_csn_list );
 407         }
 408
 409         if ( bd->bd_info->bi_db_destroy ) {
 410                 bd->bd_info->bi_db_destroy( bd );
 411         }
 412         ber_bvarray_free( bd->be_suffix );
 413         ber_bvarray_free( bd->be_nsuffix );
 414         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 415                 free( bd->be_rootdn.bv_val );
 416         }
 417         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 418                 free( bd->be_rootndn.bv_val );
 419         }
 420         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 421                 free( bd->be_rootpw.bv_val );
 422         }
 423         acl_destroy( bd->be_acl, frontendDB->be_acl );
 424         limits_destroy( bd->be_limits );
 425         if ( bd->be_replogfile ) {
 426                 ch_free( bd->be_replogfile );
 427         }
 428         destroy_replica_info( bd );
 429         if ( !BER_BVISNULL( &bd->be_update_ndn ) ) {
 430                 ch_free( bd->be_update_ndn.bv_val );
 431         }
 432         if ( bd->be_update_refs ) {
 433                 ber_bvarray_free( bd->be_update_refs );
 434         }
 435
 436         if ( dynamic ) {
 437                 free( bd );
 438         }
 439 }
 440
 441 int backend_destroy(void)
 442 {
 443         BackendDB *bd;
 444         BackendInfo *bi;
 445
 446         /* destroy each backend database */
 447         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 448                 backend_destroy_one( bd, 1 );
 449         }
 450
 451         /* destroy each backend type */
 452         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 453                 if( bi->bi_destroy ) {
 454                         bi->bi_destroy( bi );
 455                 }
 456         }
 457
 458         nBackendInfo = 0;
 459         LDAP_STAILQ_INIT(&backendInfo);
 460
 461         /* destroy frontend database */
 462         bd = frontendDB;
 463         if ( bd ) {
 464                 if ( bd->bd_info->bi_db_destroy ) {
 465                         bd->bd_info->bi_db_destroy( bd );
 466                 }
 467                 ber_bvarray_free( bd->be_suffix );
 468                 ber_bvarray_free( bd->be_nsuffix );
 469                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 470                         free( bd->be_rootdn.bv_val );
 471                 }
 472                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 473                         free( bd->be_rootndn.bv_val );
 474                 }
 475                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 476                         free( bd->be_rootpw.bv_val );
 477                 }
 478                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 479
 480                 assert( bd->be_replogfile == NULL );
 481                 assert( bd->be_replica == NULL );
 482         }
 483
 484         return 0;
 485 }
 486
 487 BackendInfo* backend_info(const char *type)
 488 {
 489         BackendInfo *bi;
 490
 491         /* search for the backend type */
 492         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 493                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 494                         return bi;
 495                 }
 496         }
 497
 498         return NULL;
 499 }
 500
 501
 502 BackendDB *
 503 backend_db_init(
 504     const char  *type )
 505 {
 506         Backend *be;
 507         BackendInfo *bi = backend_info(type);
 508         int     rc = 0;
 509
 510         if( bi == NULL ) {
 511                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 512                 return NULL;
 513         }
 514
 515         be = ch_calloc( 1, sizeof(Backend) );
 516         nbackends++;
 517         LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 518
 519         be->bd_info = bi;
 520
 521         be->be_def_limit = frontendDB->be_def_limit;
 522         be->be_dfltaccess = frontendDB->be_dfltaccess;
 523
 524         be->be_restrictops = frontendDB->be_restrictops;
 525         be->be_requires = frontendDB->be_requires;
 526         be->be_ssf_set = frontendDB->be_ssf_set;
 527
 528         be->be_pcl_mutexp = &be->be_pcl_mutex;
 529         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 530
 531         /* assign a default depth limit for alias deref */
 532         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 533
 534         if ( bi->bi_db_init ) {
 535                 rc = bi->bi_db_init( be );
 536         }
 537
 538         if ( rc != 0 ) {
 539                 fprintf( stderr, "database init failed (%s)\n", type );
 540                 nbackends--;
 541                 return NULL;
 542         }
 543
 544         bi->bi_nDB++;
 545         return( be );
 546 }
 547
 548 void
 549 be_db_close( void )
 550 {
 551         BackendDB *be;
 552
 553         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 554                 if ( be->bd_info->bi_db_close ) {
 555                         be->bd_info->bi_db_close( be );
 556                 }
 557         }
 558
 559         if ( frontendDB->bd_info->bi_db_close ) {
 560                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 561         }
 562
 563 }
 564
 565 Backend *
 566 select_backend(
 567         struct berval * dn,
 568         int manageDSAit,
 569         int noSubs )
 570 {
 571         int             j;
 572         ber_len_t       len, dnlen = dn->bv_len;
 573         Backend         *be, *b2 = NULL;
 574
 575         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 576                 if ( be->be_nsuffix == NULL ) {
 577                         continue;
 578                 }
 579
 580                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 581                 {
 582                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 583                         {
 584                                 continue;
 585                         }
 586
 587                         len = be->be_nsuffix[j].bv_len;
 588
 589                         if ( len > dnlen ) {
 590                                 /* suffix is longer than DN */
 591                                 continue;
 592                         }
 593
 594                         /*
 595                          * input DN is normalized, so the separator check
 596                          * need not look at escaping
 597                          */
 598                         if ( len && len < dnlen &&
 599                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 600                         {
 601                                 continue;
 602                         }
 603
 604                         if ( strcmp( be->be_nsuffix[j].bv_val,
 605                                 &dn->bv_val[dnlen-len] ) == 0 )
 606                         {
 607                                 if( b2 == NULL ) {
 608                                         b2 = be;
 609
 610                                         if( manageDSAit && len == dnlen &&
 611                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 612                                                 continue;
 613                                         }
 614                                 } else {
 615                                         b2 = be;
 616                                 }
 617                                 return b2;
 618                         }
 619                 }
 620         }
 621
 622         return b2;
 623 }
 624
 625 int
 626 be_issuffix(
 627     Backend *be,
 628     struct berval *bvsuffix )
 629 {
 630         int     i;
 631
 632         if ( be->be_nsuffix == NULL ) {
 633                 return 0;
 634         }
 635
 636         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 637                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 638                         return 1;
 639                 }
 640         }
 641
 642         return 0;
 643 }
 644
 645 int
 646 be_isroot_dn( Backend *be, struct berval *ndn )
 647 {
 648         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 649                 return 0;
 650         }
 651
 652         return dn_match( &be->be_rootndn, ndn );
 653 }
 654
 655 int
 656 be_slurp_update( Operation *op )
 657 {
 658         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 659                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 660 }
 661
 662 int
 663 be_shadow_update( Operation *op )
 664 {
 665         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 666                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 667 }
 668
 669 int
 670 be_isupdate_dn( Backend *be, struct berval *ndn )
 671 {
 672         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 673                 return 0;
 674         }
 675
 676         return dn_match( &be->be_update_ndn, ndn );
 677 }
 678
 679 struct berval *
 680 be_root_dn( Backend *be )
 681 {
 682         return &be->be_rootdn;
 683 }
 684
 685 int
 686 be_isroot( Operation *op )
 687 {
 688         return be_isroot_dn( op->o_bd, &op->o_ndn );
 689 }
 690
 691 int
 692 be_isroot_pw( Operation *op )
 693 {
 694         int result;
 695
 696         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 697                 return 0;
 698         }
 699
 700         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 701                 return 0;
 702         }
 703
 704 #ifdef SLAPD_SPASSWD
 705         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 706                 op->o_conn->c_sasl_authctx, NULL );
 707 #endif
 708
 709         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 710
 711 #ifdef SLAPD_SPASSWD
 712         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 713 #endif
 714
 715         return result == 0;
 716 }
 717
 718 int
 719 be_entry_release_rw(
 720         Operation *op,
 721         Entry *e,
 722         int rw )
 723 {
 724         if ( op->o_bd->be_release ) {
 725                 /* free and release entry from backend */
 726                 return op->o_bd->be_release( op, e, rw );
 727         } else {
 728                 /* free entry */
 729                 entry_free( e );
 730                 return 0;
 731         }
 732 }
 733
 734 int
 735 backend_unbind( Operation *op, SlapReply *rs )
 736 {
 737         BackendDB *be;
 738
 739         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 740                 if ( be->be_unbind ) {
 741                         op->o_bd = be;
 742                         be->be_unbind( op, rs );
 743                 }
 744         }
 745
 746         return 0;
 747 }
 748
 749 int
 750 backend_connection_init(
 751         Connection   *conn )
 752 {
 753         BackendDB *be;
 754
 755         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 756                 if ( be->be_connection_init ) {
 757                         be->be_connection_init( be, conn );
 758                 }
 759         }
 760
 761         return 0;
 762 }
 763
 764 int
 765 backend_connection_destroy(
 766         Connection   *conn )
 767 {
 768         BackendDB *be;
 769
 770         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 771                 if ( be->be_connection_destroy ) {
 772                         be->be_connection_destroy( be, conn);
 773                 }
 774         }
 775
 776         return 0;
 777 }
 778
 779 int
 780 backend_check_controls(
 781         Operation *op,
 782         SlapReply *rs )
 783 {
 784         LDAPControl **ctrls = op->o_ctrls;
 785         rs->sr_err = LDAP_SUCCESS;
 786
 787         if( ctrls ) {
 788                 for( ; *ctrls != NULL ; ctrls++ ) {
 789                         int cid;
 790
 791                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 792                         case LDAP_CONTROL_NOT_FOUND:
 793                                 /* unrecognized control */
 794                                 if ( (*ctrls)->ldctl_iscritical ) {
 795                                         /* should not be reachable */
 796                                         Debug( LDAP_DEBUG_ANY,
 797                                                 "backend_check_controls: unrecognized control: %s\n",
 798                                                 (*ctrls)->ldctl_oid, 0, 0 );
 799                                         assert( 0 );
 800                                 }
 801                                 break;
 802
 803                         case LDAP_COMPARE_FALSE:
 804                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 805                                         /* Per RFC 2251 (and LDAPBIS discussions), if the control
 806                                          * is recognized and appropriate for the operation (which
 807                                          * we've already verified), then the server should make
 808                                          * use of the control when performing the operation.
 809                                          *
 810                                          * Here we find that operation extended by the control
 811                                          * is unavailable in a particular context, and the control
 812                                          * is marked Critical, hence the return of
 813                                          * unwillingToPerform.
 814                                          */
 815                                         rs->sr_text = "critical control unavailable in context";
 816                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 817                                         goto done;
 818                                 }
 819                                 break;
 820
 821                         case LDAP_COMPARE_TRUE:
 822                                 break;
 823
 824                         default:
 825                                 /* unreachable */
 826                                 Debug( LDAP_DEBUG_ANY,
 827                                         "backend_check_controls: unable to check control: %s\n",
 828                                         (*ctrls)->ldctl_oid, 0, 0 );
 829                                 assert( 0 );
 830
 831                                 rs->sr_text = "unable to check control";
 832                                 rs->sr_err = LDAP_OTHER;
 833                                 goto done;
 834                         }
 835                 }
 836         }
 837
 838         /* check should be generalized */
 839         if( get_manageDIT(op) && !be_isroot(op)) {
 840                 rs->sr_text = "requires manager authorization";
 841                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 842         }
 843
 844 done:;
 845         return rs->sr_err;
 846 }
 847
 848 int
 849 backend_check_restrictions(
 850         Operation *op,
 851         SlapReply *rs,
 852         struct berval *opdata )
 853 {
 854         slap_mask_t restrictops;
 855         slap_mask_t requires;
 856         slap_mask_t opflag;
 857         slap_mask_t exopflag = 0;
 858         slap_ssf_set_t *ssf;
 859         int updateop = 0;
 860         int starttls = 0;
 861         int session = 0;
 862
 863         if ( op->o_bd ) {
 864                 int     rc = SLAP_CB_CONTINUE;
 865
 866                 if ( op->o_bd->be_chk_controls ) {
 867                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 868                 }
 869
 870                 if ( rc == SLAP_CB_CONTINUE ) {
 871                         rc = backend_check_controls( op, rs );
 872                 }
 873
 874                 if ( rc != LDAP_SUCCESS ) {
 875                         return rs->sr_err;
 876                 }
 877
 878                 restrictops = op->o_bd->be_restrictops;
 879                 requires = op->o_bd->be_requires;
 880                 ssf = &op->o_bd->be_ssf_set;
 881
 882         } else {
 883                 restrictops = frontendDB->be_restrictops;
 884                 requires = frontendDB->be_requires;
 885                 ssf = &frontendDB->be_ssf_set;
 886         }
 887
 888         switch( op->o_tag ) {
 889         case LDAP_REQ_ADD:
 890                 opflag = SLAP_RESTRICT_OP_ADD;
 891                 updateop++;
 892                 break;
 893         case LDAP_REQ_BIND:
 894                 opflag = SLAP_RESTRICT_OP_BIND;
 895                 session++;
 896                 break;
 897         case LDAP_REQ_COMPARE:
 898                 opflag = SLAP_RESTRICT_OP_COMPARE;
 899                 break;
 900         case LDAP_REQ_DELETE:
 901                 updateop++;
 902                 opflag = SLAP_RESTRICT_OP_DELETE;
 903                 break;
 904         case LDAP_REQ_EXTENDED:
 905                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 906
 907                 if( !opdata ) {
 908                         /* treat unspecified as a modify */
 909                         opflag = SLAP_RESTRICT_OP_MODIFY;
 910                         updateop++;
 911                         break;
 912                 }
 913
 914                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 915                         session++;
 916                         starttls++;
 917                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 918                         break;
 919                 }
 920
 921                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 922                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 923                         break;
 924                 }
 925
 926                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 927                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 928                         break;
 929                 }
 930
 931                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 932                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 933                         updateop++;
 934                         break;
 935                 }
 936
 937                 /* treat everything else as a modify */
 938                 opflag = SLAP_RESTRICT_OP_MODIFY;
 939                 updateop++;
 940                 break;
 941
 942         case LDAP_REQ_MODIFY:
 943                 updateop++;
 944                 opflag = SLAP_RESTRICT_OP_MODIFY;
 945                 break;
 946         case LDAP_REQ_RENAME:
 947                 updateop++;
 948                 opflag = SLAP_RESTRICT_OP_RENAME;
 949                 break;
 950         case LDAP_REQ_SEARCH:
 951                 opflag = SLAP_RESTRICT_OP_SEARCH;
 952                 break;
 953         case LDAP_REQ_UNBIND:
 954                 session++;
 955                 opflag = 0;
 956                 break;
 957         default:
 958                 rs->sr_text = "restrict operations internal error";
 959                 rs->sr_err = LDAP_OTHER;
 960                 return rs->sr_err;
 961         }
 962
 963         if ( !starttls ) {
 964                 /* these checks don't apply to StartTLS */
 965
 966                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 967                 if( op->o_transport_ssf < ssf->sss_transport ) {
 968                         rs->sr_text = op->o_transport_ssf
 969                                 ? "stronger transport confidentiality required"
 970                                 : "transport confidentiality required";
 971                         return rs->sr_err;
 972                 }
 973
 974                 if( op->o_tls_ssf < ssf->sss_tls ) {
 975                         rs->sr_text = op->o_tls_ssf
 976                                 ? "stronger TLS confidentiality required"
 977                                 : "TLS confidentiality required";
 978                         return rs->sr_err;
 979                 }
 980
 981
 982                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
 983                         /* simple bind specific check */
 984                         if( op->o_ssf < ssf->sss_simple_bind ) {
 985                                 rs->sr_text = op->o_ssf
 986                                         ? "stronger confidentiality required"
 987                                         : "confidentiality required";
 988                                 return rs->sr_err;
 989                         }
 990                 }
 991
 992                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
 993                         /* these checks don't apply to SASL bind */
 994
 995                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
 996                                 rs->sr_text = op->o_sasl_ssf
 997                                         ? "stronger SASL confidentiality required"
 998                                         : "SASL confidentiality required";
 999                                 return rs->sr_err;
1000                         }
1001
1002                         if( op->o_ssf < ssf->sss_ssf ) {
1003                                 rs->sr_text = op->o_ssf
1004                                         ? "stronger confidentiality required"
1005                                         : "confidentiality required";
1006                                 return rs->sr_err;
1007                         }
1008                 }
1009
1010                 if( updateop ) {
1011                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1012                                 rs->sr_text = op->o_transport_ssf
1013                                         ? "stronger transport confidentiality required for update"
1014                                         : "transport confidentiality required for update";
1015                                 return rs->sr_err;
1016                         }
1017
1018                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1019                                 rs->sr_text = op->o_tls_ssf
1020                                         ? "stronger TLS confidentiality required for update"
1021                                         : "TLS confidentiality required for update";
1022                                 return rs->sr_err;
1023                         }
1024
1025                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1026                                 rs->sr_text = op->o_sasl_ssf
1027                                         ? "stronger SASL confidentiality required for update"
1028                                         : "SASL confidentiality required for update";
1029                                 return rs->sr_err;
1030                         }
1031
1032                         if( op->o_ssf < ssf->sss_update_ssf ) {
1033                                 rs->sr_text = op->o_ssf
1034                                         ? "stronger confidentiality required for update"
1035                                         : "confidentiality required for update";
1036                                 return rs->sr_err;
1037                         }
1038
1039                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1040                                 BER_BVISEMPTY( &op->o_ndn ) )
1041                         {
1042                                 rs->sr_text = "modifications require authentication";
1043                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1044                                 return rs->sr_err;
1045                         }
1046
1047 #ifdef SLAP_X_LISTENER_MOD
1048                         if ( op->o_conn->c_listener &&
1049                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1050                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1051                         {
1052                                 /* no "w" mode means readonly */
1053                                 rs->sr_text = "modifications not allowed on this listener";
1054                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1055                                 return rs->sr_err;
1056                         }
1057 #endif /* SLAP_X_LISTENER_MOD */
1058                 }
1059         }
1060
1061         if ( !session ) {
1062                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1063
1064                 if( requires & SLAP_REQUIRE_STRONG ) {
1065                         /* should check mechanism */
1066                         if( ( op->o_transport_ssf < ssf->sss_transport
1067                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1068                                 || BER_BVISEMPTY( &op->o_dn ) )
1069                         {
1070                                 rs->sr_text = "strong(er) authentication required";
1071                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1072                                 return rs->sr_err;
1073                         }
1074                 }
1075
1076                 if( requires & SLAP_REQUIRE_SASL ) {
1077                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1078                                 rs->sr_text = "SASL authentication required";
1079                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1080                                 return rs->sr_err;
1081                         }
1082                 }
1083
1084                 if( requires & SLAP_REQUIRE_AUTHC ) {
1085                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1086                                 rs->sr_text = "authentication required";
1087                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1088                                 return rs->sr_err;
1089                         }
1090                 }
1091
1092                 if( requires & SLAP_REQUIRE_BIND ) {
1093                         int version;
1094                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1095                         version = op->o_conn->c_protocol;
1096                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1097
1098                         if( !version ) {
1099                                 /* no bind has occurred */
1100                                 rs->sr_text = "BIND required";
1101                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1102                                 return rs->sr_err;
1103                         }
1104                 }
1105
1106                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1107                         if( op->o_protocol < LDAP_VERSION3 ) {
1108                                 /* no bind has occurred */
1109                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1110                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1111                                 return rs->sr_err;
1112                         }
1113                 }
1114
1115 #ifdef SLAP_X_LISTENER_MOD
1116                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1117                         if ( op->o_conn->c_listener &&
1118                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1119                 {
1120                                 /* no "x" mode means bind required */
1121                                 rs->sr_text = "bind required on this listener";
1122                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1123                                 return rs->sr_err;
1124                         }
1125                 }
1126
1127                 if ( !starttls && !updateop ) {
1128                         if ( op->o_conn->c_listener &&
1129                                 !( op->o_conn->c_listener->sl_perms &
1130                                         ( !BER_BVISEMPTY( &op->o_dn )
1131                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1132                         {
1133                                 /* no "r" mode means no read */
1134                                 rs->sr_text = "read not allowed on this listener";
1135                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1136                                 return rs->sr_err;
1137                         }
1138                 }
1139 #endif /* SLAP_X_LISTENER_MOD */
1140
1141         }
1142
1143         if( ( restrictops & opflag )
1144                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1145                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1146                         rs->sr_text = "read operations restricted";
1147                 } else if ( restrictops & exopflag ) {
1148                         rs->sr_text = "extended operation restricted";
1149                 } else {
1150                         rs->sr_text = "operation restricted";
1151                 }
1152                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1153                 return rs->sr_err;
1154         }
1155
1156         rs->sr_err = LDAP_SUCCESS;
1157         return rs->sr_err;
1158 }
1159
1160 int backend_check_referrals( Operation *op, SlapReply *rs )
1161 {
1162         rs->sr_err = LDAP_SUCCESS;
1163
1164         if( op->o_bd->be_chk_referrals ) {
1165                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1166
1167                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1168                         send_ldap_result( op, rs );
1169                 }
1170         }
1171
1172         return rs->sr_err;
1173 }
1174
1175 int
1176 be_entry_get_rw(
1177         Operation *op,
1178         struct berval *ndn,
1179         ObjectClass *oc,
1180         AttributeDescription *at,
1181         int rw,
1182         Entry **e )
1183 {
1184         int rc;
1185
1186         *e = NULL;
1187
1188         if (op->o_bd == NULL) {
1189                 rc = LDAP_NO_SUCH_OBJECT;
1190         } else if ( op->o_bd->be_fetch ) {
1191                 rc = ( op->o_bd->be_fetch )( op, ndn,
1192                         oc, at, rw, e );
1193         } else {
1194                 rc = LDAP_UNWILLING_TO_PERFORM;
1195         }
1196         return rc;
1197 }
1198
1199 int
1200 fe_acl_group(
1201         Operation *op,
1202         Entry   *target,
1203         struct berval *gr_ndn,
1204         struct berval *op_ndn,
1205         ObjectClass *group_oc,
1206         AttributeDescription *group_at )
1207 {
1208         Entry *e;
1209         Attribute *a;
1210         int rc;
1211         GroupAssertion *g;
1212         Backend *be = op->o_bd;
1213
1214         op->o_bd = select_backend( gr_ndn, 0, 0 );
1215
1216         for ( g = op->o_groups; g; g = g->ga_next ) {
1217                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1218                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1219                 {
1220                         continue;
1221                 }
1222                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1223                         break;
1224                 }
1225         }
1226
1227         if ( g ) {
1228                 rc = g->ga_res;
1229                 goto done;
1230         }
1231
1232         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1233                 e = target;
1234                 rc = 0;
1235         } else {
1236                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1237         }
1238         if ( e ) {
1239                 a = attr_find( e->e_attrs, group_at );
1240                 if ( a ) {
1241                         /* If the attribute is a subtype of labeledURI, treat this as
1242                          * a dynamic group ala groupOfURLs
1243                          */
1244                         if (is_at_subtype( group_at->ad_type,
1245                                 slap_schema.si_ad_labeledURI->ad_type ) )
1246                         {
1247                                 int i;
1248                                 LDAPURLDesc *ludp;
1249                                 struct berval bv, nbase;
1250                                 Filter *filter;
1251                                 Entry *user;
1252                                 Backend *b2 = op->o_bd;
1253
1254                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1255                                         user = target;
1256                                 } else {
1257                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1258                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1259                                 }
1260
1261                                 if ( rc == 0 ) {
1262                                         rc = LDAP_COMPARE_FALSE;
1263                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1264                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1265                                                         LDAP_URL_SUCCESS )
1266                                                 {
1267                                                         continue;
1268                                                 }
1269                                                 BER_BVZERO( &nbase );
1270                                                 /* host part must be empty */
1271                                                 /* attrs and extensions parts must be empty */
1272                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1273                                                         ludp->lud_attrs || ludp->lud_exts )
1274                                                 {
1275                                                         goto loopit;
1276                                                 }
1277                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1278                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1279                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1280                                                 {
1281                                                         goto loopit;
1282                                                 }
1283                                                 switch ( ludp->lud_scope ) {
1284                                                 case LDAP_SCOPE_BASE:
1285                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1286                                                                 goto loopit;
1287                                                         }
1288                                                         break;
1289                                                 case LDAP_SCOPE_ONELEVEL:
1290                                                         dnParent( op_ndn, &bv );
1291                                                         if ( !dn_match( &nbase, &bv ) ) {
1292                                                                 goto loopit;
1293                                                         }
1294                                                         break;
1295                                                 case LDAP_SCOPE_SUBTREE:
1296                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1297                                                                 goto loopit;
1298                                                         }
1299                                                         break;
1300 #ifdef LDAP_SCOPE_SUBORDINATE
1301                                                 case LDAP_SCOPE_SUBORDINATE:
1302                                                         if ( dn_match( &nbase, op_ndn ) ||
1303                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1304                                                         {
1305                                                                 goto loopit;
1306                                                         }
1307 #endif
1308                                                 }
1309                                                 filter = str2filter_x( op, ludp->lud_filter );
1310                                                 if ( filter ) {
1311                                                         if ( test_filter( NULL, user, filter ) ==
1312                                                                 LDAP_COMPARE_TRUE )
1313                                                         {
1314                                                                 rc = 0;
1315                                                         }
1316                                                         filter_free_x( op, filter );
1317                                                 }
1318 loopit:
1319                                                 ldap_free_urldesc( ludp );
1320                                                 if ( !BER_BVISNULL( &nbase ) ) {
1321                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1322                                                 }
1323                                                 if ( rc == 0 ) break;
1324                                         }
1325                                         if ( user != target ) {
1326                                                 be_entry_release_r( op, user );
1327                                         }
1328                                 }
1329                                 op->o_bd = b2;
1330                         } else {
1331                                 rc = value_find_ex( group_at,
1332                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1333                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1334                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1335                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE )
1336                                         rc = LDAP_COMPARE_FALSE;
1337                         }
1338                 } else {
1339                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1340                 }
1341                 if (e != target ) {
1342                         be_entry_release_r( op, e );
1343                 }
1344         } else {
1345                 rc = LDAP_NO_SUCH_OBJECT;
1346         }
1347
1348         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1349                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1350                         op->o_tmpmemctx );
1351                 g->ga_be = op->o_bd;
1352                 g->ga_oc = group_oc;
1353                 g->ga_at = group_at;
1354                 g->ga_res = rc;
1355                 g->ga_len = gr_ndn->bv_len;
1356                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1357                 g->ga_next = op->o_groups;
1358                 op->o_groups = g;
1359         }
1360 done:
1361         op->o_bd = be;
1362         return rc;
1363 }
1364
1365 int
1366 backend_group(
1367         Operation *op,
1368         Entry   *target,
1369         struct berval *gr_ndn,
1370         struct berval *op_ndn,
1371         ObjectClass *group_oc,
1372         AttributeDescription *group_at )
1373 {
1374         int                     rc;
1375         BackendDB               *be_orig;
1376
1377         if ( op->o_abandon ) {
1378                 return SLAPD_ABANDON;
1379         }
1380
1381         be_orig = op->o_bd;
1382         op->o_bd = frontendDB;
1383         rc = frontendDB->be_group( op, target, gr_ndn,
1384                 op_ndn, group_oc, group_at );
1385         op->o_bd = be_orig;
1386
1387         return rc;
1388 }
1389
1390 int
1391 fe_acl_attribute(
1392         Operation *op,
1393         Entry   *target,
1394         struct berval   *edn,
1395         AttributeDescription *entry_at,
1396         BerVarray *vals,
1397         slap_access_t access )
1398 {
1399         Entry                   *e = NULL;
1400         Attribute               *a = NULL;
1401         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1402         AccessControlState      acl_state = ACL_STATE_INIT;
1403         Backend                 *be = op->o_bd;
1404
1405         op->o_bd = select_backend( edn, 0, 0 );
1406
1407         if ( target && dn_match( &target->e_nname, edn ) ) {
1408                 e = target;
1409
1410         } else {
1411                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1412         }
1413
1414         if ( e ) {
1415                 a = attr_find( e->e_attrs, entry_at );
1416                 if ( a == NULL ) {
1417                         SlapReply       rs = { 0 };
1418                         AttributeName   anlist[ 2 ];
1419
1420                         anlist[ 0 ].an_name = entry_at->ad_cname;
1421                         anlist[ 0 ].an_desc = entry_at;
1422                         BER_BVZERO( &anlist[ 1 ].an_name );
1423                         rs.sr_attrs = anlist;
1424
1425                         /* NOTE: backend_operational() is also called
1426                          * when returning results, so it's supposed
1427                          * to do no harm to entries */
1428                         rs.sr_entry = e;
1429                         rc = backend_operational( op, &rs );
1430                         rs.sr_entry = NULL;
1431
1432                         if ( rc == LDAP_SUCCESS ) {
1433                                 if ( rs.sr_operational_attrs ) {
1434                                         freeattr = 1;
1435                                         a = rs.sr_operational_attrs;
1436
1437                                 } else {
1438                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1439                                 }
1440                         }
1441                 }
1442
1443                 if ( a ) {
1444                         BerVarray v;
1445
1446                         if ( op->o_conn && access > ACL_NONE &&
1447                                 access_allowed( op, e, entry_at, NULL,
1448                                                 access, &acl_state ) == 0 )
1449                         {
1450                                 rc = LDAP_INSUFFICIENT_ACCESS;
1451                                 goto freeit;
1452                         }
1453
1454                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1455                                 ;
1456
1457                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1458                                 op->o_tmpmemctx );
1459                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1460                         {
1461                                 if ( op->o_conn && access > ACL_NONE &&
1462                                         access_allowed( op, e, entry_at,
1463                                                         &a->a_nvals[i],
1464                                                         access,
1465                                                         &acl_state ) == 0 )
1466                                 {
1467                                         continue;
1468                                 }
1469                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1470                                                 op->o_tmpmemctx );
1471                                 if ( !BER_BVISNULL( &v[j] ) ) {
1472                                         j++;
1473                                 }
1474                         }
1475                         if ( j == 0 ) {
1476                                 op->o_tmpfree( v, op->o_tmpmemctx );
1477                                 *vals = NULL;
1478                                 rc = LDAP_INSUFFICIENT_ACCESS;
1479
1480                         } else {
1481                                 BER_BVZERO( &v[j] );
1482                                 *vals = v;
1483                                 rc = LDAP_SUCCESS;
1484                         }
1485                 }
1486 freeit:         if ( e != target ) {
1487                         be_entry_release_r( op, e );
1488                 }
1489                 if ( freeattr ) {
1490                         attr_free( a );
1491                 }
1492         }
1493
1494         op->o_bd = be;
1495         return rc;
1496 }
1497
1498 int
1499 backend_attribute(
1500         Operation *op,
1501         Entry   *target,
1502         struct berval   *edn,
1503         AttributeDescription *entry_at,
1504         BerVarray *vals,
1505         slap_access_t access )
1506 {
1507         int                     rc;
1508         BackendDB               *be_orig;
1509
1510         be_orig = op->o_bd;
1511         op->o_bd = frontendDB;
1512         rc = frontendDB->be_attribute( op, target, edn,
1513                 entry_at, vals, access );
1514         op->o_bd = be_orig;
1515
1516         return rc;
1517 }
1518
1519 int
1520 backend_access(
1521         Operation               *op,
1522         Entry                   *target,
1523         struct berval           *edn,
1524         AttributeDescription    *entry_at,
1525         struct berval           *nval,
1526         slap_access_t           access,
1527         slap_mask_t             *mask )
1528 {
1529         Entry           *e = NULL;
1530         int             rc = LDAP_INSUFFICIENT_ACCESS;
1531         Backend         *be = op->o_bd;
1532
1533         /* pedantic */
1534         assert( op != NULL );
1535         assert( op->o_conn != NULL );
1536         assert( edn != NULL );
1537         assert( access > ACL_NONE );
1538
1539         op->o_bd = select_backend( edn, 0, 0 );
1540
1541         if ( target && dn_match( &target->e_nname, edn ) ) {
1542                 e = target;
1543
1544         } else {
1545                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1546         }
1547
1548         if ( e ) {
1549                 Attribute       *a = NULL;
1550                 int             freeattr = 0;
1551
1552                 if ( entry_at == NULL ) {
1553                         entry_at = slap_schema.si_ad_entry;
1554                 }
1555
1556                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1557                 {
1558                         if ( access_allowed_mask( op, e, entry_at,
1559                                         NULL, access, NULL, mask ) == 0 )
1560                         {
1561                                 rc = LDAP_INSUFFICIENT_ACCESS;
1562
1563                         } else {
1564                                 rc = LDAP_SUCCESS;
1565                         }
1566
1567                 } else {
1568                         a = attr_find( e->e_attrs, entry_at );
1569                         if ( a == NULL ) {
1570                                 SlapReply       rs = { 0 };
1571                                 AttributeName   anlist[ 2 ];
1572
1573                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1574                                 anlist[ 0 ].an_desc = entry_at;
1575                                 BER_BVZERO( &anlist[ 1 ].an_name );
1576                                 rs.sr_attrs = anlist;
1577
1578                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1579
1580                                 /* NOTE: backend_operational() is also called
1581                                  * when returning results, so it's supposed
1582                                  * to do no harm to entries */
1583                                 rs.sr_entry = e;
1584                                 rc = backend_operational( op, &rs );
1585                                 rs.sr_entry = NULL;
1586
1587                                 if ( rc == LDAP_SUCCESS ) {
1588                                         if ( rs.sr_operational_attrs ) {
1589                                                 freeattr = 1;
1590                                                 a = rs.sr_operational_attrs;
1591
1592                                         } else {
1593                                                 rc = LDAP_NO_SUCH_OBJECT;
1594                                         }
1595                                 }
1596                         }
1597
1598                         if ( a ) {
1599                                 if ( access_allowed_mask( op, e, entry_at,
1600                                                 nval, access, NULL, mask ) == 0 )
1601                                 {
1602                                         rc = LDAP_INSUFFICIENT_ACCESS;
1603                                         goto freeit;
1604                                 }
1605                                 rc = LDAP_SUCCESS;
1606                         }
1607                 }
1608 freeit:         if ( e != target ) {
1609                         be_entry_release_r( op, e );
1610                 }
1611                 if ( freeattr ) {
1612                         attr_free( a );
1613                 }
1614         }
1615
1616         op->o_bd = be;
1617         return rc;
1618 }
1619
1620 int
1621 fe_aux_operational(
1622         Operation *op,
1623         SlapReply *rs )
1624 {
1625         Attribute               **ap;
1626         int                     rc = 0;
1627         BackendDB               *be_orig;
1628
1629         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1630                 /* just count them */ ;
1631
1632         /*
1633          * If operational attributes (allegedly) are required,
1634          * and the backend supports specific operational attributes,
1635          * add them to the attribute list
1636          */
1637         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1638                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) )
1639         {
1640                 *ap = slap_operational_entryDN( rs->sr_entry );
1641                 ap = &(*ap)->a_next;
1642         }
1643
1644         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1645                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) )
1646         {
1647                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1648                 ap = &(*ap)->a_next;
1649         }
1650
1651         if ( op->o_bd != NULL )
1652         {
1653                 /* Let the overlays have a chance at this */
1654                 be_orig = op->o_bd;
1655                 op->o_bd = select_backend( &op->o_req_ndn, 0, 0 );
1656                 if ( op->o_bd != frontendDB &&
1657                         ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1658                         op->o_bd != NULL && op->o_bd->be_operational != NULL )
1659                 {
1660                         rc = op->o_bd->be_operational( op, rs );
1661                 }
1662                 op->o_bd = be_orig;
1663         }
1664
1665         return rc;
1666 }
1667
1668 int backend_operational( Operation *op, SlapReply *rs )
1669 {
1670         int rc;
1671         BackendDB *be_orig;
1672
1673         /* Moved this into the frontend so global overlays are called */
1674
1675         be_orig = op->o_bd;
1676         op->o_bd = frontendDB;
1677         rc = frontendDB->be_operational( op, rs );
1678         op->o_bd = be_orig;
1679
1680         return rc;
1681 }
1682