git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/filterindex.c

   1 /* filterindex.c - generate the list of candidate entries from a filter */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2008 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
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20 #include <ac/string.h>
  21
  22 #include "back-bdb.h"
  23 #include "idl.h"
  24 #ifdef LDAP_COMP_MATCH
  25 #include <component.h>
  26 #endif
  27
  28 static int presence_candidates(
  29         Operation *op,
  30         DB_TXN *rtxn,
  31         AttributeDescription *desc,
  32         ID *ids );
  33
  34 static int equality_candidates(
  35         Operation *op,
  36         DB_TXN *rtxn,
  37         AttributeAssertion *ava,
  38         ID *ids,
  39         ID *tmp );
  40 static int inequality_candidates(
  41         Operation *op,
  42         DB_TXN *rtxn,
  43         AttributeAssertion *ava,
  44         ID *ids,
  45         ID *tmp,
  46         int gtorlt );
  47 static int approx_candidates(
  48         Operation *op,
  49         DB_TXN *rtxn,
  50         AttributeAssertion *ava,
  51         ID *ids,
  52         ID *tmp );
  53 static int substring_candidates(
  54         Operation *op,
  55         DB_TXN *rtxn,
  56         SubstringsAssertion *sub,
  57         ID *ids,
  58         ID *tmp );
  59
  60 static int list_candidates(
  61         Operation *op,
  62         DB_TXN *rtxn,
  63         Filter *flist,
  64         int ftype,
  65         ID *ids,
  66         ID *tmp,
  67         ID *stack );
  68
  69 static int
  70 ext_candidates(
  71         Operation *op,
  72                 DB_TXN *rtxn,
  73         MatchingRuleAssertion *mra,
  74         ID *ids,
  75         ID *tmp,
  76         ID *stack);
  77
  78 #ifdef LDAP_COMP_MATCH
  79 static int
  80 comp_candidates (
  81         Operation *op,
  82         DB_TXN *rtxn,
  83         MatchingRuleAssertion *mra,
  84         ComponentFilter *f,
  85         ID *ids,
  86         ID *tmp,
  87         ID *stack);
  88
  89 static int
  90 ava_comp_candidates (
  91                 Operation *op,
  92                 DB_TXN *rtxn,
  93                 AttributeAssertion *ava,
  94                 AttributeAliasing *aa,
  95                 ID *ids,
  96                 ID *tmp,
  97                 ID *stack);
  98 #endif
  99
 100 int
 101 bdb_filter_candidates(
 102         Operation *op,
 103         DB_TXN *rtxn,
 104         Filter  *f,
 105         ID *ids,
 106         ID *tmp,
 107         ID *stack )
 108 {
 109         int rc = 0;
 110 #ifdef LDAP_COMP_MATCH
 111         AttributeAliasing *aa;
 112 #endif
 113         Debug( LDAP_DEBUG_FILTER, "=> bdb_filter_candidates\n", 0, 0, 0 );
 114
 115         if ( f->f_choice & SLAPD_FILTER_UNDEFINED ) {
 116                 BDB_IDL_ZERO( ids );
 117                 goto out;
 118         }
 119
 120         switch ( f->f_choice ) {
 121         case SLAPD_FILTER_COMPUTED:
 122                 switch( f->f_result ) {
 123                 case SLAPD_COMPARE_UNDEFINED:
 124                 /* This technically is not the same as FALSE, but it
 125                  * certainly will produce no matches.
 126                  */
 127                 /* FALL THRU */
 128                 case LDAP_COMPARE_FALSE:
 129                         BDB_IDL_ZERO( ids );
 130                         break;
 131                 case LDAP_COMPARE_TRUE: {
 132                         struct bdb_info *bdb = (struct bdb_info *)op->o_bd->be_private;
 133                         BDB_IDL_ALL( bdb, ids );
 134                         } break;
 135                 case LDAP_SUCCESS:
 136                         /* this is a pre-computed scope, leave it alone */
 137                         break;
 138                 }
 139                 break;
 140         case LDAP_FILTER_PRESENT:
 141                 Debug( LDAP_DEBUG_FILTER, "\tPRESENT\n", 0, 0, 0 );
 142                 rc = presence_candidates( op, rtxn, f->f_desc, ids );
 143                 break;
 144
 145         case LDAP_FILTER_EQUALITY:
 146                 Debug( LDAP_DEBUG_FILTER, "\tEQUALITY\n", 0, 0, 0 );
 147 #ifdef LDAP_COMP_MATCH
 148                 if ( is_aliased_attribute && ( aa = is_aliased_attribute ( f->f_ava->aa_desc ) ) ) {
 149                         rc = ava_comp_candidates ( op, rtxn, f->f_ava, aa, ids, tmp, stack );
 150                 }
 151                 else
 152 #endif
 153                 {
 154                         rc = equality_candidates( op, rtxn, f->f_ava, ids, tmp );
 155                 }
 156                 break;
 157
 158         case LDAP_FILTER_APPROX:
 159                 Debug( LDAP_DEBUG_FILTER, "\tAPPROX\n", 0, 0, 0 );
 160                 rc = approx_candidates( op, rtxn, f->f_ava, ids, tmp );
 161                 break;
 162
 163         case LDAP_FILTER_SUBSTRINGS:
 164                 Debug( LDAP_DEBUG_FILTER, "\tSUBSTRINGS\n", 0, 0, 0 );
 165                 rc = substring_candidates( op, rtxn, f->f_sub, ids, tmp );
 166                 break;
 167
 168         case LDAP_FILTER_GE:
 169                 /* if no GE index, use pres */
 170                 Debug( LDAP_DEBUG_FILTER, "\tGE\n", 0, 0, 0 );
 171                 if( f->f_ava->aa_desc->ad_type->sat_ordering &&
 172                         ( f->f_ava->aa_desc->ad_type->sat_ordering->smr_usage & SLAP_MR_ORDERED_INDEX ) )
 173                         rc = inequality_candidates( op, rtxn, f->f_ava, ids, tmp, LDAP_FILTER_GE );
 174                 else
 175                         rc = presence_candidates( op, rtxn, f->f_ava->aa_desc, ids );
 176                 break;
 177
 178         case LDAP_FILTER_LE:
 179                 /* if no LE index, use pres */
 180                 Debug( LDAP_DEBUG_FILTER, "\tLE\n", 0, 0, 0 );
 181                 if( f->f_ava->aa_desc->ad_type->sat_ordering &&
 182                         ( f->f_ava->aa_desc->ad_type->sat_ordering->smr_usage & SLAP_MR_ORDERED_INDEX ) )
 183                         rc = inequality_candidates( op, rtxn, f->f_ava, ids, tmp, LDAP_FILTER_LE );
 184                 else
 185                         rc = presence_candidates( op, rtxn, f->f_ava->aa_desc, ids );
 186                 break;
 187
 188         case LDAP_FILTER_NOT:
 189                 /* no indexing to support NOT filters */
 190                 Debug( LDAP_DEBUG_FILTER, "\tNOT\n", 0, 0, 0 );
 191                 { struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 192                 BDB_IDL_ALL( bdb, ids );
 193                 }
 194                 break;
 195
 196         case LDAP_FILTER_AND:
 197                 Debug( LDAP_DEBUG_FILTER, "\tAND\n", 0, 0, 0 );
 198                 rc = list_candidates( op, rtxn,
 199                         f->f_and, LDAP_FILTER_AND, ids, tmp, stack );
 200                 break;
 201
 202         case LDAP_FILTER_OR:
 203                 Debug( LDAP_DEBUG_FILTER, "\tOR\n", 0, 0, 0 );
 204                 rc = list_candidates( op, rtxn,
 205                         f->f_or, LDAP_FILTER_OR, ids, tmp, stack );
 206                 break;
 207         case LDAP_FILTER_EXT:
 208                 Debug( LDAP_DEBUG_FILTER, "\tEXT\n", 0, 0, 0 );
 209                 rc = ext_candidates( op, rtxn, f->f_mra, ids, tmp, stack );
 210                 break;
 211         default:
 212                 Debug( LDAP_DEBUG_FILTER, "\tUNKNOWN %lu\n",
 213                         (unsigned long) f->f_choice, 0, 0 );
 214                 /* Must not return NULL, otherwise extended filters break */
 215                 { struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 216                 BDB_IDL_ALL( bdb, ids );
 217                 }
 218         }
 219
 220 out:
 221         Debug( LDAP_DEBUG_FILTER,
 222                 "<= bdb_filter_candidates: id=%ld first=%ld last=%ld\n",
 223                 (long) ids[0],
 224                 (long) BDB_IDL_FIRST( ids ),
 225                 (long) BDB_IDL_LAST( ids ) );
 226
 227         return rc;
 228 }
 229
 230 #ifdef LDAP_COMP_MATCH
 231 static int
 232 comp_list_candidates(
 233         Operation *op,
 234         DB_TXN *rtxn,
 235         MatchingRuleAssertion* mra,
 236         ComponentFilter *flist,
 237         int     ftype,
 238         ID *ids,
 239         ID *tmp,
 240         ID *save )
 241 {
 242         int rc = 0;
 243         ComponentFilter *f;
 244
 245         Debug( LDAP_DEBUG_FILTER, "=> comp_list_candidates 0x%x\n", ftype, 0, 0 );
 246         for ( f = flist; f != NULL; f = f->cf_next ) {
 247                 /* ignore precomputed scopes */
 248                 if ( f->cf_choice == SLAPD_FILTER_COMPUTED &&
 249                      f->cf_result == LDAP_SUCCESS ) {
 250                         continue;
 251                 }
 252                 BDB_IDL_ZERO( save );
 253                 rc = comp_candidates( op, rtxn, mra, f, save, tmp, save+BDB_IDL_UM_SIZE );
 254
 255                 if ( rc != 0 ) {
 256                         if ( ftype == LDAP_COMP_FILTER_AND ) {
 257                                 rc = 0;
 258                                 continue;
 259                         }
 260                         break;
 261                 }
 262
 263                 if ( ftype == LDAP_COMP_FILTER_AND ) {
 264                         if ( f == flist ) {
 265                                 BDB_IDL_CPY( ids, save );
 266                         } else {
 267                                 bdb_idl_intersection( ids, save );
 268                         }
 269                         if( BDB_IDL_IS_ZERO( ids ) )
 270                                 break;
 271                 } else {
 272                         if ( f == flist ) {
 273                                 BDB_IDL_CPY( ids, save );
 274                         } else {
 275                                 bdb_idl_union( ids, save );
 276                         }
 277                 }
 278         }
 279
 280         if( rc == LDAP_SUCCESS ) {
 281                 Debug( LDAP_DEBUG_FILTER,
 282                         "<= comp_list_candidates: id=%ld first=%ld last=%ld\n",
 283                         (long) ids[0],
 284                         (long) BDB_IDL_FIRST(ids),
 285                         (long) BDB_IDL_LAST(ids) );
 286
 287         } else {
 288                 Debug( LDAP_DEBUG_FILTER,
 289                         "<= comp_list_candidates: undefined rc=%d\n",
 290                         rc, 0, 0 );
 291         }
 292
 293         return rc;
 294 }
 295
 296 static int
 297 comp_equality_candidates (
 298         Operation *op,
 299         DB_TXN *rtxn,
 300         MatchingRuleAssertion *mra,
 301         ComponentAssertion *ca,
 302         ID *ids,
 303         ID *tmp,
 304         ID *stack)
 305 {
 306        struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 307         DB      *db;
 308         int i;
 309         int rc;
 310         slap_mask_t mask;
 311         struct berval prefix = {0, NULL};
 312         struct berval *keys = NULL;
 313         MatchingRule *mr = mra->ma_rule;
 314         Syntax *sat_syntax;
 315         ComponentReference* cr_list, *cr;
 316         AttrInfo *ai;
 317
 318         BDB_IDL_ALL( bdb, ids );
 319
 320         if ( !ca->ca_comp_ref )
 321                 return 0;
 322
 323         ai = bdb_attr_mask( op->o_bd->be_private, mra->ma_desc );
 324         if( ai ) {
 325                 cr_list = ai->ai_cr;
 326         }
 327         else {
 328                 return 0;
 329         }
 330         /* find a component reference to be indexed */
 331         sat_syntax = ca->ca_ma_rule->smr_syntax;
 332         for ( cr = cr_list ; cr ; cr = cr->cr_next ) {
 333                 if ( cr->cr_string.bv_len == ca->ca_comp_ref->cr_string.bv_len &&
 334                         strncmp( cr->cr_string.bv_val, ca->ca_comp_ref->cr_string.bv_val,cr->cr_string.bv_len ) == 0 )
 335                         break;
 336         }
 337
 338         if ( !cr )
 339                 return 0;
 340
 341         rc = bdb_index_param( op->o_bd, mra->ma_desc, LDAP_FILTER_EQUALITY,
 342                 &db, &mask, &prefix );
 343
 344         if( rc != LDAP_SUCCESS ) {
 345                 return 0;
 346         }
 347
 348         if( !mr ) {
 349                 return 0;
 350         }
 351
 352         if( !mr->smr_filter ) {
 353                 return 0;
 354         }
 355
 356         rc = (ca->ca_ma_rule->smr_filter)(
 357                 LDAP_FILTER_EQUALITY,
 358                 cr->cr_indexmask,
 359                 sat_syntax,
 360                 ca->ca_ma_rule,
 361                 &prefix,
 362                 &ca->ca_ma_value,
 363                 &keys, op->o_tmpmemctx );
 364
 365         if( rc != LDAP_SUCCESS ) {
 366                 return 0;
 367         }
 368
 369         if( keys == NULL ) {
 370                 return 0;
 371         }
 372         for ( i= 0; keys[i].bv_val != NULL; i++ ) {
 373                 rc = bdb_key_read( op->o_bd, db, rtxn, &keys[i], tmp, NULL, 0 );
 374
 375                 if( rc == DB_NOTFOUND ) {
 376                         BDB_IDL_ZERO( ids );
 377                         rc = 0;
 378                         break;
 379                 } else if( rc != LDAP_SUCCESS ) {
 380                         break;
 381                 }
 382
 383                 if( BDB_IDL_IS_ZERO( tmp ) ) {
 384                         BDB_IDL_ZERO( ids );
 385                         break;
 386                 }
 387
 388                 if ( i == 0 ) {
 389                         BDB_IDL_CPY( ids, tmp );
 390                 } else {
 391                         bdb_idl_intersection( ids, tmp );
 392                 }
 393
 394                 if( BDB_IDL_IS_ZERO( ids ) )
 395                         break;
 396         }
 397         ber_bvarray_free_x( keys, op->o_tmpmemctx );
 398
 399         Debug( LDAP_DEBUG_TRACE,
 400                 "<= comp_equality_candidates: id=%ld, first=%ld, last=%ld\n",
 401                 (long) ids[0],
 402                 (long) BDB_IDL_FIRST(ids),
 403                 (long) BDB_IDL_LAST(ids) );
 404         return( rc );
 405 }
 406
 407 static int
 408 ava_comp_candidates (
 409         Operation *op,
 410         DB_TXN *rtxn,
 411         AttributeAssertion *ava,
 412         AttributeAliasing *aa,
 413         ID *ids,
 414         ID *tmp,
 415         ID *stack )
 416 {
 417         MatchingRuleAssertion mra;
 418
 419         mra.ma_rule = ava->aa_desc->ad_type->sat_equality;
 420         if ( !mra.ma_rule ) {
 421                 struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 422                 BDB_IDL_ALL( bdb, ids );
 423                 return 0;
 424         }
 425         mra.ma_desc = aa->aa_aliased_ad;
 426         mra.ma_rule = ava->aa_desc->ad_type->sat_equality;
 427
 428         return comp_candidates ( op, rtxn, &mra, ava->aa_cf, ids, tmp, stack );
 429 }
 430
 431 static int
 432 comp_candidates (
 433         Operation *op,
 434         DB_TXN *rtxn,
 435         MatchingRuleAssertion *mra,
 436         ComponentFilter *f,
 437         ID *ids,
 438         ID *tmp,
 439         ID *stack)
 440 {
 441         int     rc;
 442
 443         if ( !f ) return LDAP_PROTOCOL_ERROR;
 444
 445         Debug( LDAP_DEBUG_FILTER, "comp_candidates\n", 0, 0, 0 );
 446         switch ( f->cf_choice ) {
 447         case SLAPD_FILTER_COMPUTED:
 448                 rc = f->cf_result;
 449                 break;
 450         case LDAP_COMP_FILTER_AND:
 451                 rc = comp_list_candidates( op, rtxn, mra, f->cf_and, LDAP_COMP_FILTER_AND, ids, tmp, stack );
 452                 break;
 453         case LDAP_COMP_FILTER_OR:
 454                 rc = comp_list_candidates( op, rtxn, mra, f->cf_or, LDAP_COMP_FILTER_OR, ids, tmp, stack );
 455                 break;
 456         case LDAP_COMP_FILTER_NOT:
 457                 /* No component indexing supported for NOT filter */
 458                 Debug( LDAP_DEBUG_FILTER, "\tComponent NOT\n", 0, 0, 0 );
 459                 {
 460                         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 461                         BDB_IDL_ALL( bdb, ids );
 462                 }
 463                 rc = LDAP_PROTOCOL_ERROR;
 464                 break;
 465         case LDAP_COMP_FILTER_ITEM:
 466                 rc = comp_equality_candidates( op, rtxn, mra, f->cf_ca, ids, tmp, stack );
 467                 break;
 468         default:
 469                 {
 470                         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 471                         BDB_IDL_ALL( bdb, ids );
 472                 }
 473                 rc = LDAP_PROTOCOL_ERROR;
 474         }
 475
 476         return( rc );
 477 }
 478 #endif
 479
 480 static int
 481 ext_candidates(
 482         Operation *op,
 483                 DB_TXN *rtxn,
 484         MatchingRuleAssertion *mra,
 485         ID *ids,
 486         ID *tmp,
 487         ID *stack)
 488 {
 489         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 490
 491 #ifdef LDAP_COMP_MATCH
 492         /*
 493          * Currently Only Component Indexing for componentFilterMatch is supported
 494          * Indexing for an extensible filter is not supported yet
 495          */
 496         if ( mra->ma_cf ) {
 497                 return comp_candidates ( op, rtxn, mra, mra->ma_cf, ids, tmp, stack);
 498         }
 499 #endif
 500         if ( mra->ma_desc == slap_schema.si_ad_entryDN ) {
 501                 int rc;
 502                 EntryInfo *ei;
 503
 504                 BDB_IDL_ZERO( ids );
 505                 if ( mra->ma_rule == slap_schema.si_mr_distinguishedNameMatch ) {
 506                         ei = NULL;
 507                         rc = bdb_cache_find_ndn( op, rtxn, &mra->ma_value, &ei );
 508                         if ( rc == LDAP_SUCCESS )
 509                                 bdb_idl_insert( ids, ei->bei_id );
 510                         if ( ei )
 511                                 bdb_cache_entryinfo_unlock( ei );
 512                         return 0;
 513                 } else if ( mra->ma_rule && mra->ma_rule->smr_match ==
 514                         dnRelativeMatch && dnIsSuffix( &mra->ma_value,
 515                                 op->o_bd->be_nsuffix )) {
 516                         int scope;
 517                         if ( mra->ma_rule == slap_schema.si_mr_dnSuperiorMatch ) {
 518                                 struct berval pdn;
 519                                 ei = NULL;
 520                                 dnParent( &mra->ma_value, &pdn );
 521                                 bdb_cache_find_ndn( op, rtxn, &pdn, &ei );
 522                                 if ( ei ) {
 523                                         bdb_cache_entryinfo_unlock( ei );
 524                                         while ( ei && ei->bei_id ) {
 525                                                 bdb_idl_insert( ids, ei->bei_id );
 526                                                 ei = ei->bei_parent;
 527                                         }
 528                                 }
 529                                 return 0;
 530                         }
 531                         if ( mra->ma_rule == slap_schema.si_mr_dnSubtreeMatch )
 532                                 scope = LDAP_SCOPE_SUBTREE;
 533                         else if ( mra->ma_rule == slap_schema.si_mr_dnOneLevelMatch )
 534                                 scope = LDAP_SCOPE_ONELEVEL;
 535                         else if ( mra->ma_rule == slap_schema.si_mr_dnSubordinateMatch )
 536                                 scope = LDAP_SCOPE_SUBORDINATE;
 537                         else
 538                                 scope = LDAP_SCOPE_BASE;
 539                         if ( scope > LDAP_SCOPE_BASE ) {
 540                                 ei = NULL;
 541                                 rc = bdb_cache_find_ndn( op, rtxn, &mra->ma_value, &ei );
 542                                 if ( ei )
 543                                         bdb_cache_entryinfo_unlock( ei );
 544                                 if ( rc == LDAP_SUCCESS ) {
 545                                         int sc = op->ors_scope;
 546                                         op->ors_scope = scope;
 547                                         rc = bdb_dn2idl( op, rtxn, &mra->ma_value, ei, ids,
 548                                                 stack );
 549                                         op->ors_scope = sc;
 550                                 }
 551                                 return 0;
 552                         }
 553                 }
 554         }
 555
 556         BDB_IDL_ALL( bdb, ids );
 557         return 0;
 558 }
 559
 560 static int
 561 list_candidates(
 562         Operation *op,
 563         DB_TXN *rtxn,
 564         Filter  *flist,
 565         int             ftype,
 566         ID *ids,
 567         ID *tmp,
 568         ID *save )
 569 {
 570         int rc = 0;
 571         Filter  *f;
 572
 573         Debug( LDAP_DEBUG_FILTER, "=> bdb_list_candidates 0x%x\n", ftype, 0, 0 );
 574         for ( f = flist; f != NULL; f = f->f_next ) {
 575                 /* ignore precomputed scopes */
 576                 if ( f->f_choice == SLAPD_FILTER_COMPUTED &&
 577                      f->f_result == LDAP_SUCCESS ) {
 578                         continue;
 579                 }
 580                 BDB_IDL_ZERO( save );
 581                 rc = bdb_filter_candidates( op, rtxn, f, save, tmp,
 582                         save+BDB_IDL_UM_SIZE );
 583
 584                 if ( rc != 0 ) {
 585                         if ( rc == DB_LOCK_DEADLOCK )
 586                                 return rc;
 587
 588                         if ( ftype == LDAP_FILTER_AND ) {
 589                                 rc = 0;
 590                                 continue;
 591                         }
 592                         break;
 593                 }
 594
 595
 596                 if ( ftype == LDAP_FILTER_AND ) {
 597                         if ( f == flist ) {
 598                                 BDB_IDL_CPY( ids, save );
 599                         } else {
 600                                 bdb_idl_intersection( ids, save );
 601                         }
 602                         if( BDB_IDL_IS_ZERO( ids ) )
 603                                 break;
 604                 } else {
 605                         if ( f == flist ) {
 606                                 BDB_IDL_CPY( ids, save );
 607                         } else {
 608                                 bdb_idl_union( ids, save );
 609                         }
 610                 }
 611         }
 612
 613         if( rc == LDAP_SUCCESS ) {
 614                 Debug( LDAP_DEBUG_FILTER,
 615                         "<= bdb_list_candidates: id=%ld first=%ld last=%ld\n",
 616                         (long) ids[0],
 617                         (long) BDB_IDL_FIRST(ids),
 618                         (long) BDB_IDL_LAST(ids) );
 619
 620         } else {
 621                 Debug( LDAP_DEBUG_FILTER,
 622                         "<= bdb_list_candidates: undefined rc=%d\n",
 623                         rc, 0, 0 );
 624         }
 625
 626         return rc;
 627 }
 628
 629 static int
 630 presence_candidates(
 631         Operation *op,
 632         DB_TXN *rtxn,
 633         AttributeDescription *desc,
 634         ID *ids )
 635 {
 636         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 637         DB *db;
 638         int rc;
 639         slap_mask_t mask;
 640         struct berval prefix = {0, NULL};
 641
 642         Debug( LDAP_DEBUG_TRACE, "=> bdb_presence_candidates (%s)\n",
 643                         desc->ad_cname.bv_val, 0, 0 );
 644
 645         BDB_IDL_ALL( bdb, ids );
 646
 647         if( desc == slap_schema.si_ad_objectClass ) {
 648                 return 0;
 649         }
 650
 651         rc = bdb_index_param( op->o_bd, desc, LDAP_FILTER_PRESENT,
 652                 &db, &mask, &prefix );
 653
 654         if( rc == LDAP_INAPPROPRIATE_MATCHING ) {
 655                 /* not indexed */
 656                 Debug( LDAP_DEBUG_TRACE,
 657                         "<= bdb_presence_candidates: (%s) not indexed\n",
 658                         desc->ad_cname.bv_val, 0, 0 );
 659                 return 0;
 660         }
 661
 662         if( rc != LDAP_SUCCESS ) {
 663                 Debug( LDAP_DEBUG_TRACE,
 664                         "<= bdb_presence_candidates: (%s) index_param "
 665                         "returned=%d\n",
 666                         desc->ad_cname.bv_val, rc, 0 );
 667                 return 0;
 668         }
 669
 670         if( prefix.bv_val == NULL ) {
 671                 Debug( LDAP_DEBUG_TRACE,
 672                         "<= bdb_presence_candidates: (%s) no prefix\n",
 673                         desc->ad_cname.bv_val, 0, 0 );
 674                 return -1;
 675         }
 676
 677         rc = bdb_key_read( op->o_bd, db, rtxn, &prefix, ids, NULL, 0 );
 678
 679         if( rc == DB_NOTFOUND ) {
 680                 BDB_IDL_ZERO( ids );
 681                 rc = 0;
 682         } else if( rc != LDAP_SUCCESS ) {
 683                 Debug( LDAP_DEBUG_TRACE,
 684                         "<= bdb_presense_candidates: (%s) "
 685                         "key read failed (%d)\n",
 686                         desc->ad_cname.bv_val, rc, 0 );
 687                 goto done;
 688         }
 689
 690         Debug(LDAP_DEBUG_TRACE,
 691                 "<= bdb_presence_candidates: id=%ld first=%ld last=%ld\n",
 692                 (long) ids[0],
 693                 (long) BDB_IDL_FIRST(ids),
 694                 (long) BDB_IDL_LAST(ids) );
 695
 696 done:
 697         return rc;
 698 }
 699
 700 static int
 701 equality_candidates(
 702         Operation *op,
 703         DB_TXN *rtxn,
 704         AttributeAssertion *ava,
 705         ID *ids,
 706         ID *tmp )
 707 {
 708         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 709         DB      *db;
 710         int i;
 711         int rc;
 712         slap_mask_t mask;
 713         struct berval prefix = {0, NULL};
 714         struct berval *keys = NULL;
 715         MatchingRule *mr;
 716
 717         Debug( LDAP_DEBUG_TRACE, "=> bdb_equality_candidates (%s)\n",
 718                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 719
 720         BDB_IDL_ALL( bdb, ids );
 721
 722         rc = bdb_index_param( op->o_bd, ava->aa_desc, LDAP_FILTER_EQUALITY,
 723                 &db, &mask, &prefix );
 724
 725         if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
 726                 Debug( LDAP_DEBUG_ANY,
 727                         "<= bdb_equality_candidates: (%s) not indexed\n",
 728                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 729                 return 0;
 730         }
 731
 732         if( rc != LDAP_SUCCESS ) {
 733                 Debug( LDAP_DEBUG_ANY,
 734                         "<= bdb_equality_candidates: (%s) "
 735                         "index_param failed (%d)\n",
 736                         ava->aa_desc->ad_cname.bv_val, rc, 0 );
 737                 return 0;
 738         }
 739
 740         mr = ava->aa_desc->ad_type->sat_equality;
 741         if( !mr ) {
 742                 return 0;
 743         }
 744
 745         if( !mr->smr_filter ) {
 746                 return 0;
 747         }
 748
 749         rc = (mr->smr_filter)(
 750                 LDAP_FILTER_EQUALITY,
 751                 mask,
 752                 ava->aa_desc->ad_type->sat_syntax,
 753                 mr,
 754                 &prefix,
 755                 &ava->aa_value,
 756                 &keys, op->o_tmpmemctx );
 757
 758         if( rc != LDAP_SUCCESS ) {
 759                 Debug( LDAP_DEBUG_TRACE,
 760                         "<= bdb_equality_candidates: (%s, %s) "
 761                         "MR filter failed (%d)\n",
 762                         prefix.bv_val, ava->aa_desc->ad_cname.bv_val, rc );
 763                 return 0;
 764         }
 765
 766         if( keys == NULL ) {
 767                 Debug( LDAP_DEBUG_TRACE,
 768                         "<= bdb_equality_candidates: (%s) no keys\n",
 769                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 770                 return 0;
 771         }
 772
 773         for ( i= 0; keys[i].bv_val != NULL; i++ ) {
 774                 rc = bdb_key_read( op->o_bd, db, rtxn, &keys[i], tmp, NULL, 0 );
 775
 776                 if( rc == DB_NOTFOUND ) {
 777                         BDB_IDL_ZERO( ids );
 778                         rc = 0;
 779                         break;
 780                 } else if( rc != LDAP_SUCCESS ) {
 781                         Debug( LDAP_DEBUG_TRACE,
 782                                 "<= bdb_equality_candidates: (%s) "
 783                                 "key read failed (%d)\n",
 784                                 ava->aa_desc->ad_cname.bv_val, rc, 0 );
 785                         break;
 786                 }
 787
 788                 if( BDB_IDL_IS_ZERO( tmp ) ) {
 789                         Debug( LDAP_DEBUG_TRACE,
 790                                 "<= bdb_equality_candidates: (%s) NULL\n",
 791                                 ava->aa_desc->ad_cname.bv_val, 0, 0 );
 792                         BDB_IDL_ZERO( ids );
 793                         break;
 794                 }
 795
 796                 if ( i == 0 ) {
 797                         BDB_IDL_CPY( ids, tmp );
 798                 } else {
 799                         bdb_idl_intersection( ids, tmp );
 800                 }
 801
 802                 if( BDB_IDL_IS_ZERO( ids ) )
 803                         break;
 804         }
 805
 806         ber_bvarray_free_x( keys, op->o_tmpmemctx );
 807
 808         Debug( LDAP_DEBUG_TRACE,
 809                 "<= bdb_equality_candidates: id=%ld, first=%ld, last=%ld\n",
 810                 (long) ids[0],
 811                 (long) BDB_IDL_FIRST(ids),
 812                 (long) BDB_IDL_LAST(ids) );
 813         return( rc );
 814 }
 815
 816
 817 static int
 818 approx_candidates(
 819         Operation *op,
 820         DB_TXN *rtxn,
 821         AttributeAssertion *ava,
 822         ID *ids,
 823         ID *tmp )
 824 {
 825         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 826         DB      *db;
 827         int i;
 828         int rc;
 829         slap_mask_t mask;
 830         struct berval prefix = {0, NULL};
 831         struct berval *keys = NULL;
 832         MatchingRule *mr;
 833
 834         Debug( LDAP_DEBUG_TRACE, "=> bdb_approx_candidates (%s)\n",
 835                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 836
 837         BDB_IDL_ALL( bdb, ids );
 838
 839         rc = bdb_index_param( op->o_bd, ava->aa_desc, LDAP_FILTER_APPROX,
 840                 &db, &mask, &prefix );
 841
 842         if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
 843                 Debug( LDAP_DEBUG_ANY,
 844                         "<= bdb_approx_candidates: (%s) not indexed\n",
 845                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 846                 return 0;
 847         }
 848
 849         if( rc != LDAP_SUCCESS ) {
 850                 Debug( LDAP_DEBUG_ANY,
 851                         "<= bdb_approx_candidates: (%s) "
 852                         "index_param failed (%d)\n",
 853                         ava->aa_desc->ad_cname.bv_val, rc, 0 );
 854                 return 0;
 855         }
 856
 857         mr = ava->aa_desc->ad_type->sat_approx;
 858         if( !mr ) {
 859                 /* no approx matching rule, try equality matching rule */
 860                 mr = ava->aa_desc->ad_type->sat_equality;
 861         }
 862
 863         if( !mr ) {
 864                 return 0;
 865         }
 866
 867         if( !mr->smr_filter ) {
 868                 return 0;
 869         }
 870
 871         rc = (mr->smr_filter)(
 872                 LDAP_FILTER_APPROX,
 873                 mask,
 874                 ava->aa_desc->ad_type->sat_syntax,
 875                 mr,
 876                 &prefix,
 877                 &ava->aa_value,
 878                 &keys, op->o_tmpmemctx );
 879
 880         if( rc != LDAP_SUCCESS ) {
 881                 Debug( LDAP_DEBUG_TRACE,
 882                         "<= bdb_approx_candidates: (%s, %s) "
 883                         "MR filter failed (%d)\n",
 884                         prefix.bv_val, ava->aa_desc->ad_cname.bv_val, rc );
 885                 return 0;
 886         }
 887
 888         if( keys == NULL ) {
 889                 Debug( LDAP_DEBUG_TRACE,
 890                         "<= bdb_approx_candidates: (%s) no keys (%s)\n",
 891                         prefix.bv_val, ava->aa_desc->ad_cname.bv_val, 0 );
 892                 return 0;
 893         }
 894
 895         for ( i= 0; keys[i].bv_val != NULL; i++ ) {
 896                 rc = bdb_key_read( op->o_bd, db, rtxn, &keys[i], tmp, NULL, 0 );
 897
 898                 if( rc == DB_NOTFOUND ) {
 899                         BDB_IDL_ZERO( ids );
 900                         rc = 0;
 901                         break;
 902                 } else if( rc != LDAP_SUCCESS ) {
 903                         Debug( LDAP_DEBUG_TRACE,
 904                                 "<= bdb_approx_candidates: (%s) "
 905                                 "key read failed (%d)\n",
 906                                 ava->aa_desc->ad_cname.bv_val, rc, 0 );
 907                         break;
 908                 }
 909
 910                 if( BDB_IDL_IS_ZERO( tmp ) ) {
 911                         Debug( LDAP_DEBUG_TRACE,
 912                                 "<= bdb_approx_candidates: (%s) NULL\n",
 913                                 ava->aa_desc->ad_cname.bv_val, 0, 0 );
 914                         BDB_IDL_ZERO( ids );
 915                         break;
 916                 }
 917
 918                 if ( i == 0 ) {
 919                         BDB_IDL_CPY( ids, tmp );
 920                 } else {
 921                         bdb_idl_intersection( ids, tmp );
 922                 }
 923
 924                 if( BDB_IDL_IS_ZERO( ids ) )
 925                         break;
 926         }
 927
 928         ber_bvarray_free_x( keys, op->o_tmpmemctx );
 929
 930         Debug( LDAP_DEBUG_TRACE, "<= bdb_approx_candidates %ld, first=%ld, last=%ld\n",
 931                 (long) ids[0],
 932                 (long) BDB_IDL_FIRST(ids),
 933                 (long) BDB_IDL_LAST(ids) );
 934         return( rc );
 935 }
 936
 937 static int
 938 substring_candidates(
 939         Operation *op,
 940         DB_TXN *rtxn,
 941         SubstringsAssertion     *sub,
 942         ID *ids,
 943         ID *tmp )
 944 {
 945         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 946         DB      *db;
 947         int i;
 948         int rc;
 949         slap_mask_t mask;
 950         struct berval prefix = {0, NULL};
 951         struct berval *keys = NULL;
 952         MatchingRule *mr;
 953
 954         Debug( LDAP_DEBUG_TRACE, "=> bdb_substring_candidates (%s)\n",
 955                         sub->sa_desc->ad_cname.bv_val, 0, 0 );
 956
 957         BDB_IDL_ALL( bdb, ids );
 958
 959         rc = bdb_index_param( op->o_bd, sub->sa_desc, LDAP_FILTER_SUBSTRINGS,
 960                 &db, &mask, &prefix );
 961
 962         if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
 963                 Debug( LDAP_DEBUG_ANY,
 964                         "<= bdb_substring_candidates: (%s) not indexed\n",
 965                         sub->sa_desc->ad_cname.bv_val, 0, 0 );
 966                 return 0;
 967         }
 968
 969         if( rc != LDAP_SUCCESS ) {
 970                 Debug( LDAP_DEBUG_ANY,
 971                         "<= bdb_substring_candidates: (%s) "
 972                         "index_param failed (%d)\n",
 973                         sub->sa_desc->ad_cname.bv_val, rc, 0 );
 974                 return 0;
 975         }
 976
 977         mr = sub->sa_desc->ad_type->sat_substr;
 978
 979         if( !mr ) {
 980                 return 0;
 981         }
 982
 983         if( !mr->smr_filter ) {
 984                 return 0;
 985         }
 986
 987         rc = (mr->smr_filter)(
 988                 LDAP_FILTER_SUBSTRINGS,
 989                 mask,
 990                 sub->sa_desc->ad_type->sat_syntax,
 991                 mr,
 992                 &prefix,
 993                 sub,
 994                 &keys, op->o_tmpmemctx );
 995
 996         if( rc != LDAP_SUCCESS ) {
 997                 Debug( LDAP_DEBUG_TRACE,
 998                         "<= bdb_substring_candidates: (%s) "
 999                         "MR filter failed (%d)\n",
1000                         sub->sa_desc->ad_cname.bv_val, rc, 0 );
1001                 return 0;
1002         }
1003
1004         if( keys == NULL ) {
1005                 Debug( LDAP_DEBUG_TRACE,
1006                         "<= bdb_substring_candidates: (0x%04lx) no keys (%s)\n",
1007                         mask, sub->sa_desc->ad_cname.bv_val, 0 );
1008                 return 0;
1009         }
1010
1011         for ( i= 0; keys[i].bv_val != NULL; i++ ) {
1012                 rc = bdb_key_read( op->o_bd, db, rtxn, &keys[i], tmp, NULL, 0 );
1013
1014                 if( rc == DB_NOTFOUND ) {
1015                         BDB_IDL_ZERO( ids );
1016                         rc = 0;
1017                         break;
1018                 } else if( rc != LDAP_SUCCESS ) {
1019                         Debug( LDAP_DEBUG_TRACE,
1020                                 "<= bdb_substring_candidates: (%s) "
1021                                 "key read failed (%d)\n",
1022                                 sub->sa_desc->ad_cname.bv_val, rc, 0 );
1023                         break;
1024                 }
1025
1026                 if( BDB_IDL_IS_ZERO( tmp ) ) {
1027                         Debug( LDAP_DEBUG_TRACE,
1028                                 "<= bdb_substring_candidates: (%s) NULL\n",
1029                                 sub->sa_desc->ad_cname.bv_val, 0, 0 );
1030                         BDB_IDL_ZERO( ids );
1031                         break;
1032                 }
1033
1034                 if ( i == 0 ) {
1035                         BDB_IDL_CPY( ids, tmp );
1036                 } else {
1037                         bdb_idl_intersection( ids, tmp );
1038                 }
1039
1040                 if( BDB_IDL_IS_ZERO( ids ) )
1041                         break;
1042         }
1043
1044         ber_bvarray_free_x( keys, op->o_tmpmemctx );
1045
1046         Debug( LDAP_DEBUG_TRACE, "<= bdb_substring_candidates: %ld, first=%ld, last=%ld\n",
1047                 (long) ids[0],
1048                 (long) BDB_IDL_FIRST(ids),
1049                 (long) BDB_IDL_LAST(ids) );
1050         return( rc );
1051 }
1052
1053 static int
1054 inequality_candidates(
1055         Operation *op,
1056         DB_TXN *rtxn,
1057         AttributeAssertion *ava,
1058         ID *ids,
1059         ID *tmp,
1060         int gtorlt )
1061 {
1062         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1063         DB      *db;
1064         int rc;
1065         slap_mask_t mask;
1066         struct berval prefix = {0, NULL};
1067         struct berval *keys = NULL;
1068         MatchingRule *mr;
1069         DBC * cursor = NULL;
1070
1071         Debug( LDAP_DEBUG_TRACE, "=> bdb_inequality_candidates (%s)\n",
1072                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
1073
1074         BDB_IDL_ALL( bdb, ids );
1075
1076         rc = bdb_index_param( op->o_bd, ava->aa_desc, LDAP_FILTER_EQUALITY,
1077                 &db, &mask, &prefix );
1078
1079         if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
1080                 Debug( LDAP_DEBUG_ANY,
1081                         "<= bdb_inequality_candidates: (%s) not indexed\n",
1082                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
1083                 return 0;
1084         }
1085
1086         if( rc != LDAP_SUCCESS ) {
1087                 Debug( LDAP_DEBUG_ANY,
1088                         "<= bdb_inequality_candidates: (%s) "
1089                         "index_param failed (%d)\n",
1090                         ava->aa_desc->ad_cname.bv_val, rc, 0 );
1091                 return 0;
1092         }
1093
1094         mr = ava->aa_desc->ad_type->sat_equality;
1095         if( !mr ) {
1096                 return 0;
1097         }
1098
1099         if( !mr->smr_filter ) {
1100                 return 0;
1101         }
1102
1103         rc = (mr->smr_filter)(
1104                 LDAP_FILTER_EQUALITY,
1105                 mask,
1106                 ava->aa_desc->ad_type->sat_syntax,
1107                 mr,
1108                 &prefix,
1109                 &ava->aa_value,
1110                 &keys, op->o_tmpmemctx );
1111
1112         if( rc != LDAP_SUCCESS ) {
1113                 Debug( LDAP_DEBUG_TRACE,
1114                         "<= bdb_inequality_candidates: (%s, %s) "
1115                         "MR filter failed (%d)\n",
1116                         prefix.bv_val, ava->aa_desc->ad_cname.bv_val, rc );
1117                 return 0;
1118         }
1119
1120         if( keys == NULL ) {
1121                 Debug( LDAP_DEBUG_TRACE,
1122                         "<= bdb_inequality_candidates: (%s) no keys\n",
1123                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
1124                 return 0;
1125         }
1126
1127         BDB_IDL_ZERO( ids );
1128         while(1) {
1129                 rc = bdb_key_read( op->o_bd, db, rtxn, &keys[0], tmp, &cursor, gtorlt );
1130
1131                 if( rc == DB_NOTFOUND ) {
1132                         rc = 0;
1133                         break;
1134                 } else if( rc != LDAP_SUCCESS ) {
1135                         Debug( LDAP_DEBUG_TRACE,
1136                                "<= bdb_inequality_candidates: (%s) "
1137                                "key read failed (%d)\n",
1138                                ava->aa_desc->ad_cname.bv_val, rc, 0 );
1139                         break;
1140                 }
1141
1142                 if( BDB_IDL_IS_ZERO( tmp ) ) {
1143                         Debug( LDAP_DEBUG_TRACE,
1144                                "<= bdb_inequality_candidates: (%s) NULL\n",
1145                                ava->aa_desc->ad_cname.bv_val, 0, 0 );
1146                         break;
1147                 }
1148
1149                 bdb_idl_union( ids, tmp );
1150
1151                 if( op->ors_limit && op->ors_limit->lms_s_unchecked != -1 &&
1152                         BDB_IDL_N( ids ) >= (unsigned) op->ors_limit->lms_s_unchecked ) {
1153                         cursor->c_close( cursor );
1154                         break;
1155                 }
1156         }
1157         ber_bvarray_free_x( keys, op->o_tmpmemctx );
1158
1159         Debug( LDAP_DEBUG_TRACE,
1160                 "<= bdb_inequality_candidates: id=%ld, first=%ld, last=%ld\n",
1161                 (long) ids[0],
1162                 (long) BDB_IDL_FIRST(ids),
1163                 (long) BDB_IDL_LAST(ids) );
1164         return( rc );
1165 }