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 2000-2007 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         BDB_LOCKER locker,
  31         AttributeDescription *desc,
  32         ID *ids );
  33
  34 static int equality_candidates(
  35         Operation *op,
  36         BDB_LOCKER locker,
  37         AttributeAssertion *ava,
  38         ID *ids,
  39         ID *tmp );
  40 static int inequality_candidates(
  41         Operation *op,
  42         BDB_LOCKER locker,
  43         AttributeAssertion *ava,
  44         ID *ids,
  45         ID *tmp,
  46         int gtorlt );
  47 static int approx_candidates(
  48         Operation *op,
  49         BDB_LOCKER locker,
  50         AttributeAssertion *ava,
  51         ID *ids,
  52         ID *tmp );
  53 static int substring_candidates(
  54         Operation *op,
  55         BDB_LOCKER locker,
  56         SubstringsAssertion *sub,
  57         ID *ids,
  58         ID *tmp );
  59
  60 static int list_candidates(
  61         Operation *op,
  62         BDB_LOCKER locker,
  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                 BDB_LOCKER locker,
  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         BDB_LOCKER locker,
  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                 BDB_LOCKER locker,
  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         BDB_LOCKER locker,
 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, locker, 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, locker, f->f_ava, aa, ids, tmp, stack );
 150                 }
 151                 else
 152 #endif
 153                 {
 154                         rc = equality_candidates( op, locker, 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, locker, 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, locker, 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, locker, f->f_ava, ids, tmp, LDAP_FILTER_GE );
 174                 else
 175                         rc = presence_candidates( op, locker, 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, locker, f->f_ava, ids, tmp, LDAP_FILTER_LE );
 184                 else
 185                         rc = presence_candidates( op, locker, 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, locker,
 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, locker,
 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, locker, 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         BDB_LOCKER locker,
 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, locker, 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         BDB_LOCKER locker,
 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, locker, &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         BDB_LOCKER locker,
 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, locker, &mra, ava->aa_cf, ids, tmp, stack );
 429 }
 430
 431 static int
 432 comp_candidates (
 433         Operation *op,
 434         BDB_LOCKER locker,
 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, locker, 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, locker, 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, locker, 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                 BDB_LOCKER locker,
 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, locker, 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, NULL, &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, NULL, &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, NULL, &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, locker, &mra->ma_value, ei, ids,
 548                                                 stack );
 549                                 }
 550                                 return 0;
 551                         }
 552                 }
 553         }
 554
 555         BDB_IDL_ALL( bdb, ids );
 556         return 0;
 557 }
 558
 559 static int
 560 list_candidates(
 561         Operation *op,
 562         BDB_LOCKER locker,
 563         Filter  *flist,
 564         int             ftype,
 565         ID *ids,
 566         ID *tmp,
 567         ID *save )
 568 {
 569         int rc = 0;
 570         Filter  *f;
 571
 572         Debug( LDAP_DEBUG_FILTER, "=> bdb_list_candidates 0x%x\n", ftype, 0, 0 );
 573         for ( f = flist; f != NULL; f = f->f_next ) {
 574                 /* ignore precomputed scopes */
 575                 if ( f->f_choice == SLAPD_FILTER_COMPUTED &&
 576                      f->f_result == LDAP_SUCCESS ) {
 577                         continue;
 578                 }
 579                 BDB_IDL_ZERO( save );
 580                 rc = bdb_filter_candidates( op, locker, f, save, tmp,
 581                         save+BDB_IDL_UM_SIZE );
 582
 583                 if ( rc != 0 ) {
 584                         if ( ftype == LDAP_FILTER_AND ) {
 585                                 rc = 0;
 586                                 continue;
 587                         }
 588                         break;
 589                 }
 590
 591
 592                 if ( ftype == LDAP_FILTER_AND ) {
 593                         if ( f == flist ) {
 594                                 BDB_IDL_CPY( ids, save );
 595                         } else {
 596                                 bdb_idl_intersection( ids, save );
 597                         }
 598                         if( BDB_IDL_IS_ZERO( ids ) )
 599                                 break;
 600                 } else {
 601                         if ( f == flist ) {
 602                                 BDB_IDL_CPY( ids, save );
 603                         } else {
 604                                 bdb_idl_union( ids, save );
 605                         }
 606                 }
 607         }
 608
 609         if( rc == LDAP_SUCCESS ) {
 610                 Debug( LDAP_DEBUG_FILTER,
 611                         "<= bdb_list_candidates: id=%ld first=%ld last=%ld\n",
 612                         (long) ids[0],
 613                         (long) BDB_IDL_FIRST(ids),
 614                         (long) BDB_IDL_LAST(ids) );
 615
 616         } else {
 617                 Debug( LDAP_DEBUG_FILTER,
 618                         "<= bdb_list_candidates: undefined rc=%d\n",
 619                         rc, 0, 0 );
 620         }
 621
 622         return rc;
 623 }
 624
 625 static int
 626 presence_candidates(
 627         Operation *op,
 628         BDB_LOCKER locker,
 629         AttributeDescription *desc,
 630         ID *ids )
 631 {
 632         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 633         DB *db;
 634         int rc;
 635         slap_mask_t mask;
 636         struct berval prefix = {0, NULL};
 637
 638         Debug( LDAP_DEBUG_TRACE, "=> bdb_presence_candidates (%s)\n",
 639                         desc->ad_cname.bv_val, 0, 0 );
 640
 641         BDB_IDL_ALL( bdb, ids );
 642
 643         if( desc == slap_schema.si_ad_objectClass ) {
 644                 return 0;
 645         }
 646
 647         rc = bdb_index_param( op->o_bd, desc, LDAP_FILTER_PRESENT,
 648                 &db, &mask, &prefix );
 649
 650         if( rc == LDAP_INAPPROPRIATE_MATCHING ) {
 651                 /* not indexed */
 652                 Debug( LDAP_DEBUG_TRACE,
 653                         "<= bdb_presence_candidates: (%s) not indexed\n",
 654                         desc->ad_cname.bv_val, 0, 0 );
 655                 return 0;
 656         }
 657
 658         if( rc != LDAP_SUCCESS ) {
 659                 Debug( LDAP_DEBUG_TRACE,
 660                         "<= bdb_presence_candidates: (%s) index_param "
 661                         "returned=%d\n",
 662                         desc->ad_cname.bv_val, rc, 0 );
 663                 return 0;
 664         }
 665
 666         if( prefix.bv_val == NULL ) {
 667                 Debug( LDAP_DEBUG_TRACE,
 668                         "<= bdb_presence_candidates: (%s) no prefix\n",
 669                         desc->ad_cname.bv_val, 0, 0 );
 670                 return -1;
 671         }
 672
 673         rc = bdb_key_read( op->o_bd, db, locker, &prefix, ids, NULL, 0 );
 674
 675         if( rc == DB_NOTFOUND ) {
 676                 BDB_IDL_ZERO( ids );
 677                 rc = 0;
 678         } else if( rc != LDAP_SUCCESS ) {
 679                 Debug( LDAP_DEBUG_TRACE,
 680                         "<= bdb_presense_candidates: (%s) "
 681                         "key read failed (%d)\n",
 682                         desc->ad_cname.bv_val, rc, 0 );
 683                 goto done;
 684         }
 685
 686         Debug(LDAP_DEBUG_TRACE,
 687                 "<= bdb_presence_candidates: id=%ld first=%ld last=%ld\n",
 688                 (long) ids[0],
 689                 (long) BDB_IDL_FIRST(ids),
 690                 (long) BDB_IDL_LAST(ids) );
 691
 692 done:
 693         return rc;
 694 }
 695
 696 static int
 697 equality_candidates(
 698         Operation *op,
 699         BDB_LOCKER locker,
 700         AttributeAssertion *ava,
 701         ID *ids,
 702         ID *tmp )
 703 {
 704         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 705         DB      *db;
 706         int i;
 707         int rc;
 708         slap_mask_t mask;
 709         struct berval prefix = {0, NULL};
 710         struct berval *keys = NULL;
 711         MatchingRule *mr;
 712
 713         Debug( LDAP_DEBUG_TRACE, "=> bdb_equality_candidates (%s)\n",
 714                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 715
 716         BDB_IDL_ALL( bdb, ids );
 717
 718         rc = bdb_index_param( op->o_bd, ava->aa_desc, LDAP_FILTER_EQUALITY,
 719                 &db, &mask, &prefix );
 720
 721         if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
 722                 Debug( LDAP_DEBUG_ANY,
 723                         "<= bdb_equality_candidates: (%s) not indexed\n",
 724                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 725                 return 0;
 726         }
 727
 728         if( rc != LDAP_SUCCESS ) {
 729                 Debug( LDAP_DEBUG_ANY,
 730                         "<= bdb_equality_candidates: (%s) "
 731                         "index_param failed (%d)\n",
 732                         ava->aa_desc->ad_cname.bv_val, rc, 0 );
 733                 return 0;
 734         }
 735
 736         mr = ava->aa_desc->ad_type->sat_equality;
 737         if( !mr ) {
 738                 return 0;
 739         }
 740
 741         if( !mr->smr_filter ) {
 742                 return 0;
 743         }
 744
 745         rc = (mr->smr_filter)(
 746                 LDAP_FILTER_EQUALITY,
 747                 mask,
 748                 ava->aa_desc->ad_type->sat_syntax,
 749                 mr,
 750                 &prefix,
 751                 &ava->aa_value,
 752                 &keys, op->o_tmpmemctx );
 753
 754         if( rc != LDAP_SUCCESS ) {
 755                 Debug( LDAP_DEBUG_TRACE,
 756                         "<= bdb_equality_candidates: (%s, %s) "
 757                         "MR filter failed (%d)\n",
 758                         prefix.bv_val, ava->aa_desc->ad_cname.bv_val, rc );
 759                 return 0;
 760         }
 761
 762         if( keys == NULL ) {
 763                 Debug( LDAP_DEBUG_TRACE,
 764                         "<= bdb_equality_candidates: (%s) no keys\n",
 765                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 766                 return 0;
 767         }
 768
 769         for ( i= 0; keys[i].bv_val != NULL; i++ ) {
 770                 rc = bdb_key_read( op->o_bd, db, locker, &keys[i], tmp, NULL, 0 );
 771
 772                 if( rc == DB_NOTFOUND ) {
 773                         BDB_IDL_ZERO( ids );
 774                         rc = 0;
 775                         break;
 776                 } else if( rc != LDAP_SUCCESS ) {
 777                         Debug( LDAP_DEBUG_TRACE,
 778                                 "<= bdb_equality_candidates: (%s) "
 779                                 "key read failed (%d)\n",
 780                                 ava->aa_desc->ad_cname.bv_val, rc, 0 );
 781                         break;
 782                 }
 783
 784                 if( BDB_IDL_IS_ZERO( tmp ) ) {
 785                         Debug( LDAP_DEBUG_TRACE,
 786                                 "<= bdb_equality_candidates: (%s) NULL\n",
 787                                 ava->aa_desc->ad_cname.bv_val, 0, 0 );
 788                         BDB_IDL_ZERO( ids );
 789                         break;
 790                 }
 791
 792                 if ( i == 0 ) {
 793                         BDB_IDL_CPY( ids, tmp );
 794                 } else {
 795                         bdb_idl_intersection( ids, tmp );
 796                 }
 797
 798                 if( BDB_IDL_IS_ZERO( ids ) )
 799                         break;
 800         }
 801
 802         ber_bvarray_free_x( keys, op->o_tmpmemctx );
 803
 804         Debug( LDAP_DEBUG_TRACE,
 805                 "<= bdb_equality_candidates: id=%ld, first=%ld, last=%ld\n",
 806                 (long) ids[0],
 807                 (long) BDB_IDL_FIRST(ids),
 808                 (long) BDB_IDL_LAST(ids) );
 809         return( rc );
 810 }
 811
 812
 813 static int
 814 approx_candidates(
 815         Operation *op,
 816         BDB_LOCKER locker,
 817         AttributeAssertion *ava,
 818         ID *ids,
 819         ID *tmp )
 820 {
 821         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 822         DB      *db;
 823         int i;
 824         int rc;
 825         slap_mask_t mask;
 826         struct berval prefix = {0, NULL};
 827         struct berval *keys = NULL;
 828         MatchingRule *mr;
 829
 830         Debug( LDAP_DEBUG_TRACE, "=> bdb_approx_candidates (%s)\n",
 831                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 832
 833         BDB_IDL_ALL( bdb, ids );
 834
 835         rc = bdb_index_param( op->o_bd, ava->aa_desc, LDAP_FILTER_APPROX,
 836                 &db, &mask, &prefix );
 837
 838         if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
 839                 Debug( LDAP_DEBUG_ANY,
 840                         "<= bdb_approx_candidates: (%s) not indexed\n",
 841                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
 842                 return 0;
 843         }
 844
 845         if( rc != LDAP_SUCCESS ) {
 846                 Debug( LDAP_DEBUG_ANY,
 847                         "<= bdb_approx_candidates: (%s) "
 848                         "index_param failed (%d)\n",
 849                         ava->aa_desc->ad_cname.bv_val, rc, 0 );
 850                 return 0;
 851         }
 852
 853         mr = ava->aa_desc->ad_type->sat_approx;
 854         if( !mr ) {
 855                 /* no approx matching rule, try equality matching rule */
 856                 mr = ava->aa_desc->ad_type->sat_equality;
 857         }
 858
 859         if( !mr ) {
 860                 return 0;
 861         }
 862
 863         if( !mr->smr_filter ) {
 864                 return 0;
 865         }
 866
 867         rc = (mr->smr_filter)(
 868                 LDAP_FILTER_APPROX,
 869                 mask,
 870                 ava->aa_desc->ad_type->sat_syntax,
 871                 mr,
 872                 &prefix,
 873                 &ava->aa_value,
 874                 &keys, op->o_tmpmemctx );
 875
 876         if( rc != LDAP_SUCCESS ) {
 877                 Debug( LDAP_DEBUG_TRACE,
 878                         "<= bdb_approx_candidates: (%s, %s) "
 879                         "MR filter failed (%d)\n",
 880                         prefix.bv_val, ava->aa_desc->ad_cname.bv_val, rc );
 881                 return 0;
 882         }
 883
 884         if( keys == NULL ) {
 885                 Debug( LDAP_DEBUG_TRACE,
 886                         "<= bdb_approx_candidates: (%s) no keys (%s)\n",
 887                         prefix.bv_val, ava->aa_desc->ad_cname.bv_val, 0 );
 888                 return 0;
 889         }
 890
 891         for ( i= 0; keys[i].bv_val != NULL; i++ ) {
 892                 rc = bdb_key_read( op->o_bd, db, locker, &keys[i], tmp, NULL, 0 );
 893
 894                 if( rc == DB_NOTFOUND ) {
 895                         BDB_IDL_ZERO( ids );
 896                         rc = 0;
 897                         break;
 898                 } else if( rc != LDAP_SUCCESS ) {
 899                         Debug( LDAP_DEBUG_TRACE,
 900                                 "<= bdb_approx_candidates: (%s) "
 901                                 "key read failed (%d)\n",
 902                                 ava->aa_desc->ad_cname.bv_val, rc, 0 );
 903                         break;
 904                 }
 905
 906                 if( BDB_IDL_IS_ZERO( tmp ) ) {
 907                         Debug( LDAP_DEBUG_TRACE,
 908                                 "<= bdb_approx_candidates: (%s) NULL\n",
 909                                 ava->aa_desc->ad_cname.bv_val, 0, 0 );
 910                         BDB_IDL_ZERO( ids );
 911                         break;
 912                 }
 913
 914                 if ( i == 0 ) {
 915                         BDB_IDL_CPY( ids, tmp );
 916                 } else {
 917                         bdb_idl_intersection( ids, tmp );
 918                 }
 919
 920                 if( BDB_IDL_IS_ZERO( ids ) )
 921                         break;
 922         }
 923
 924         ber_bvarray_free_x( keys, op->o_tmpmemctx );
 925
 926         Debug( LDAP_DEBUG_TRACE, "<= bdb_approx_candidates %ld, first=%ld, last=%ld\n",
 927                 (long) ids[0],
 928                 (long) BDB_IDL_FIRST(ids),
 929                 (long) BDB_IDL_LAST(ids) );
 930         return( rc );
 931 }
 932
 933 static int
 934 substring_candidates(
 935         Operation *op,
 936         BDB_LOCKER locker,
 937         SubstringsAssertion     *sub,
 938         ID *ids,
 939         ID *tmp )
 940 {
 941         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 942         DB      *db;
 943         int i;
 944         int rc;
 945         slap_mask_t mask;
 946         struct berval prefix = {0, NULL};
 947         struct berval *keys = NULL;
 948         MatchingRule *mr;
 949
 950         Debug( LDAP_DEBUG_TRACE, "=> bdb_substring_candidates (%s)\n",
 951                         sub->sa_desc->ad_cname.bv_val, 0, 0 );
 952
 953         BDB_IDL_ALL( bdb, ids );
 954
 955         rc = bdb_index_param( op->o_bd, sub->sa_desc, LDAP_FILTER_SUBSTRINGS,
 956                 &db, &mask, &prefix );
 957
 958         if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
 959                 Debug( LDAP_DEBUG_ANY,
 960                         "<= bdb_substring_candidates: (%s) not indexed\n",
 961                         sub->sa_desc->ad_cname.bv_val, 0, 0 );
 962                 return 0;
 963         }
 964
 965         if( rc != LDAP_SUCCESS ) {
 966                 Debug( LDAP_DEBUG_ANY,
 967                         "<= bdb_substring_candidates: (%s) "
 968                         "index_param failed (%d)\n",
 969                         sub->sa_desc->ad_cname.bv_val, rc, 0 );
 970                 return 0;
 971         }
 972
 973         mr = sub->sa_desc->ad_type->sat_substr;
 974
 975         if( !mr ) {
 976                 return 0;
 977         }
 978
 979         if( !mr->smr_filter ) {
 980                 return 0;
 981         }
 982
 983         rc = (mr->smr_filter)(
 984                 LDAP_FILTER_SUBSTRINGS,
 985                 mask,
 986                 sub->sa_desc->ad_type->sat_syntax,
 987                 mr,
 988                 &prefix,
 989                 sub,
 990                 &keys, op->o_tmpmemctx );
 991
 992         if( rc != LDAP_SUCCESS ) {
 993                 Debug( LDAP_DEBUG_TRACE,
 994                         "<= bdb_substring_candidates: (%s) "
 995                         "MR filter failed (%d)\n",
 996                         sub->sa_desc->ad_cname.bv_val, rc, 0 );
 997                 return 0;
 998         }
 999
1000         if( keys == NULL ) {
1001                 Debug( LDAP_DEBUG_TRACE,
1002                         "<= bdb_substring_candidates: (0x%04lx) no keys (%s)\n",
1003                         mask, sub->sa_desc->ad_cname.bv_val, 0 );
1004                 return 0;
1005         }
1006
1007         for ( i= 0; keys[i].bv_val != NULL; i++ ) {
1008                 rc = bdb_key_read( op->o_bd, db, locker, &keys[i], tmp, NULL, 0 );
1009
1010                 if( rc == DB_NOTFOUND ) {
1011                         BDB_IDL_ZERO( ids );
1012                         rc = 0;
1013                         break;
1014                 } else if( rc != LDAP_SUCCESS ) {
1015                         Debug( LDAP_DEBUG_TRACE,
1016                                 "<= bdb_substring_candidates: (%s) "
1017                                 "key read failed (%d)\n",
1018                                 sub->sa_desc->ad_cname.bv_val, rc, 0 );
1019                         break;
1020                 }
1021
1022                 if( BDB_IDL_IS_ZERO( tmp ) ) {
1023                         Debug( LDAP_DEBUG_TRACE,
1024                                 "<= bdb_substring_candidates: (%s) NULL\n",
1025                                 sub->sa_desc->ad_cname.bv_val, 0, 0 );
1026                         BDB_IDL_ZERO( ids );
1027                         break;
1028                 }
1029
1030                 if ( i == 0 ) {
1031                         BDB_IDL_CPY( ids, tmp );
1032                 } else {
1033                         bdb_idl_intersection( ids, tmp );
1034                 }
1035
1036                 if( BDB_IDL_IS_ZERO( ids ) )
1037                         break;
1038         }
1039
1040         ber_bvarray_free_x( keys, op->o_tmpmemctx );
1041
1042         Debug( LDAP_DEBUG_TRACE, "<= bdb_substring_candidates: %ld, first=%ld, last=%ld\n",
1043                 (long) ids[0],
1044                 (long) BDB_IDL_FIRST(ids),
1045                 (long) BDB_IDL_LAST(ids) );
1046         return( rc );
1047 }
1048
1049 static int
1050 inequality_candidates(
1051         Operation *op,
1052         BDB_LOCKER locker,
1053         AttributeAssertion *ava,
1054         ID *ids,
1055         ID *tmp,
1056         int gtorlt )
1057 {
1058         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1059         DB      *db;
1060         int rc;
1061         slap_mask_t mask;
1062         struct berval prefix = {0, NULL};
1063         struct berval *keys = NULL;
1064         MatchingRule *mr;
1065         DBC * cursor = NULL;
1066
1067         Debug( LDAP_DEBUG_TRACE, "=> bdb_inequality_candidates (%s)\n",
1068                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
1069
1070         BDB_IDL_ALL( bdb, ids );
1071
1072         rc = bdb_index_param( op->o_bd, ava->aa_desc, LDAP_FILTER_EQUALITY,
1073                 &db, &mask, &prefix );
1074
1075         if ( rc == LDAP_INAPPROPRIATE_MATCHING ) {
1076                 Debug( LDAP_DEBUG_ANY,
1077                         "<= bdb_inequality_candidates: (%s) not indexed\n",
1078                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
1079                 return 0;
1080         }
1081
1082         if( rc != LDAP_SUCCESS ) {
1083                 Debug( LDAP_DEBUG_ANY,
1084                         "<= bdb_inequality_candidates: (%s) "
1085                         "index_param failed (%d)\n",
1086                         ava->aa_desc->ad_cname.bv_val, rc, 0 );
1087                 return 0;
1088         }
1089
1090         mr = ava->aa_desc->ad_type->sat_equality;
1091         if( !mr ) {
1092                 return 0;
1093         }
1094
1095         if( !mr->smr_filter ) {
1096                 return 0;
1097         }
1098
1099         rc = (mr->smr_filter)(
1100                 LDAP_FILTER_EQUALITY,
1101                 mask,
1102                 ava->aa_desc->ad_type->sat_syntax,
1103                 mr,
1104                 &prefix,
1105                 &ava->aa_value,
1106                 &keys, op->o_tmpmemctx );
1107
1108         if( rc != LDAP_SUCCESS ) {
1109                 Debug( LDAP_DEBUG_TRACE,
1110                         "<= bdb_inequality_candidates: (%s, %s) "
1111                         "MR filter failed (%d)\n",
1112                         prefix.bv_val, ava->aa_desc->ad_cname.bv_val, rc );
1113                 return 0;
1114         }
1115
1116         if( keys == NULL ) {
1117                 Debug( LDAP_DEBUG_TRACE,
1118                         "<= bdb_inequality_candidates: (%s) no keys\n",
1119                         ava->aa_desc->ad_cname.bv_val, 0, 0 );
1120                 return 0;
1121         }
1122
1123         BDB_IDL_ZERO( ids );
1124         while(1) {
1125                 rc = bdb_key_read( op->o_bd, db, locker, &keys[0], tmp, &cursor, gtorlt );
1126
1127                 if( rc == DB_NOTFOUND ) {
1128                         rc = 0;
1129                         break;
1130                 } else if( rc != LDAP_SUCCESS ) {
1131                         Debug( LDAP_DEBUG_TRACE,
1132                                "<= bdb_inequality_candidates: (%s) "
1133                                "key read failed (%d)\n",
1134                                ava->aa_desc->ad_cname.bv_val, rc, 0 );
1135                         break;
1136                 }
1137
1138                 if( BDB_IDL_IS_ZERO( tmp ) ) {
1139                         Debug( LDAP_DEBUG_TRACE,
1140                                "<= bdb_inequality_candidates: (%s) NULL\n",
1141                                ava->aa_desc->ad_cname.bv_val, 0, 0 );
1142                         break;
1143                 }
1144
1145                 bdb_idl_union( ids, tmp );
1146
1147                 if( op->ors_limit && op->ors_limit->lms_s_unchecked != -1 &&
1148                         BDB_IDL_N( ids ) >= (unsigned) op->ors_limit->lms_s_unchecked ) {
1149                         cursor->c_close( cursor );
1150                         break;
1151                 }
1152         }
1153         ber_bvarray_free_x( keys, op->o_tmpmemctx );
1154
1155         Debug( LDAP_DEBUG_TRACE,
1156                 "<= bdb_inequality_candidates: id=%ld, first=%ld, last=%ld\n",
1157                 (long) ids[0],
1158                 (long) BDB_IDL_FIRST(ids),
1159                 (long) BDB_IDL_LAST(ids) );
1160         return( rc );
1161 }