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

   1 /* search.c - search operation */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11 #include <ac/string.h>
  12
  13 #include "back-bdb.h"
  14 #include "idl.h"
  15 #include "external.h"
  16
  17 static int base_candidate(
  18         BackendDB       *be,
  19         Entry   *e,
  20         ID              *ids );
  21
  22 static int search_candidates(
  23         Operation *stackop,     /* op with the current threadctx/slab cache */
  24         Operation *sop,         /* search op */
  25         SlapReply *rs,
  26         Entry *e,
  27         u_int32_t locker,
  28         ID      *ids,
  29         ID      *scopes );
  30
  31 static void send_pagerequest_response(
  32         Operation *op,
  33         SlapReply *rs,
  34         ID  lastid,
  35         int tentries );
  36
  37 /* Dereference aliases for a single alias entry. Return the final
  38  * dereferenced entry on success, NULL on any failure.
  39  */
  40 static Entry * deref_base (
  41         Operation *op,
  42         SlapReply *rs,
  43         Entry *e,
  44         Entry **matched,
  45         u_int32_t locker,
  46         DB_LOCK *lock,
  47         ID      *tmp,
  48         ID      *visited )
  49 {
  50         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  51         struct berval ndn;
  52         EntryInfo *ei;
  53         DB_LOCK lockr;
  54
  55         rs->sr_err = LDAP_ALIAS_DEREF_PROBLEM;
  56         rs->sr_text = "maximum deref depth exceeded";
  57
  58         while (BDB_IDL_N(tmp) < op->o_bd->be_max_deref_depth) {
  59
  60                 /* Remember the last entry we looked at, so we can
  61                  * report broken links
  62                  */
  63                 *matched = e;
  64
  65                 /* If this is part of a subtree or onelevel search,
  66                  * have we seen this ID before? If so, quit.
  67                  */
  68                 if ( visited && bdb_idl_insert( visited, e->e_id ) ) {
  69                         e = NULL;
  70                         break;
  71                 }
  72
  73                 /* If we've seen this ID during this deref iteration,
  74                  * we've hit a loop.
  75                  */
  76                 if ( bdb_idl_insert( tmp, e->e_id ) ) {
  77                         rs->sr_err = LDAP_ALIAS_PROBLEM;
  78                         rs->sr_text = "circular alias";
  79                         e = NULL;
  80                         break;
  81                 }
  82
  83                 /* If there was a problem getting the aliasedObjectName,
  84                  * get_alias_dn will have set the error status.
  85                  */
  86                 if ( get_alias_dn(e, &ndn, &rs->sr_err, &rs->sr_text) ) {
  87                         e = NULL;
  88                         break;
  89                 }
  90
  91                 rs->sr_err = bdb_dn2entry( op, NULL, &ndn, &ei,
  92                         0, locker, &lockr );
  93
  94                 if ( ei ) e = ei->bei_e;
  95                 else    e = NULL;
  96
  97                 if (!e) {
  98                         rs->sr_err = LDAP_ALIAS_PROBLEM;
  99                         rs->sr_text = "aliasedObject not found";
 100                         break;
 101                 }
 102
 103                 /* Free the previous entry, continue to work with the
 104                  * one we just retrieved.
 105                  */
 106                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 107                         *matched, lock);
 108                 *lock = lockr;
 109
 110                 /* We found a regular entry. Return this to the caller. The
 111                  * entry is still locked for Read.
 112                  */
 113                 if (!is_entry_alias(e)) {
 114                         rs->sr_err = LDAP_SUCCESS;
 115                         rs->sr_text = NULL;
 116                         break;
 117                 }
 118         }
 119         return e;
 120 }
 121
 122 /* Look for and dereference all aliases within the search scope. Adds
 123  * the dereferenced entries to the "ids" list. Requires "stack" to be
 124  * able to hold 8 levels of DB_SIZE IDLs. Of course we're hardcoded to
 125  * require a minimum of 8 UM_SIZE IDLs so this is never a problem.
 126  */
 127 static int search_aliases(
 128         Operation *op,
 129         SlapReply *rs,
 130         Entry *e,
 131         u_int32_t locker,
 132         ID *ids,
 133         ID *scopes,
 134         ID *stack
 135 )
 136 {
 137         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 138         ID *aliases, *curscop, *subscop, *visited, *newsubs, *oldsubs, *tmp;
 139         ID cursora, ida, cursoro, ido, *subscop2;
 140         Entry *matched, *a;
 141         EntryInfo *ei;
 142         struct berval bv_alias = { sizeof("alias")-1, "alias" };
 143         AttributeAssertion aa_alias;
 144         Filter  af;
 145         DB_LOCK locka, lockr;
 146         int first = 1;
 147
 148         aliases = stack;        /* IDL of all aliases in the database */
 149         curscop = aliases + BDB_IDL_DB_SIZE;    /* Aliases in the current scope */
 150         subscop = curscop + BDB_IDL_DB_SIZE;    /* The current scope */
 151         visited = subscop + BDB_IDL_DB_SIZE;    /* IDs we've seen in this search */
 152         newsubs = visited + BDB_IDL_DB_SIZE;    /* New subtrees we've added */
 153         oldsubs = newsubs + BDB_IDL_DB_SIZE;    /* Subtrees added previously */
 154         tmp = oldsubs + BDB_IDL_DB_SIZE;        /* Scratch space for deref_base() */
 155
 156         /* A copy of subscop, because subscop gets clobbered by
 157          * the bdb_idl_union/intersection routines
 158          */
 159         subscop2 = tmp + BDB_IDL_DB_SIZE;
 160
 161         af.f_choice = LDAP_FILTER_EQUALITY;
 162         af.f_ava = &aa_alias;
 163         af.f_av_desc = slap_schema.si_ad_objectClass;
 164         af.f_av_value = bv_alias;
 165         af.f_next = NULL;
 166
 167         /* Find all aliases in database */
 168         BDB_IDL_ZERO( aliases );
 169         rs->sr_err = bdb_filter_candidates( op, &af, aliases,
 170                 curscop, visited );
 171         if (rs->sr_err != LDAP_SUCCESS) {
 172                 return rs->sr_err;
 173         }
 174         oldsubs[0] = 1;
 175         oldsubs[1] = e->e_id;
 176
 177         BDB_IDL_ZERO( ids );
 178         BDB_IDL_ZERO( visited );
 179         BDB_IDL_ZERO( newsubs );
 180
 181         cursoro = 0;
 182         ido = bdb_idl_first( oldsubs, &cursoro );
 183
 184         for (;;) {
 185                 /* Set curscop to only the aliases in the current scope. Start with
 186                  * all the aliases, obtain the IDL for the current scope, and then
 187                  * get the intersection of these two IDLs. Add the current scope
 188                  * to the cumulative list of candidates.
 189                  */
 190                 BDB_IDL_CPY( curscop, aliases );
 191                 rs->sr_err = bdb_dn2idl( op, e, subscop,
 192                                         subscop2+BDB_IDL_DB_SIZE );
 193                 if (first) {
 194                         first = 0;
 195                 } else {
 196                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, e, &locka);
 197                 }
 198                 BDB_IDL_CPY(subscop2, subscop);
 199                 rs->sr_err = bdb_idl_intersection(curscop, subscop);
 200                 bdb_idl_union( ids, subscop2 );
 201
 202                 /* Dereference all of the aliases in the current scope. */
 203                 cursora = 0;
 204                 for (ida = bdb_idl_first(curscop, &cursora); ida != NOID;
 205                         ida = bdb_idl_next(curscop, &cursora))
 206                 {
 207                         ei = NULL;
 208                         rs->sr_err = bdb_cache_find_id(op, NULL,
 209                                 ida, &ei, 0, locker, &lockr );
 210                         if (rs->sr_err != LDAP_SUCCESS) {
 211                                 continue;
 212                         }
 213                         a = ei->bei_e;
 214
 215                         /* This should only happen if the curscop IDL has maxed out and
 216                          * turned into a range that spans IDs indiscriminately
 217                          */
 218                         if (!is_entry_alias(a)) {
 219                                 bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 220                                         a, &lockr);
 221                                 continue;
 222                         }
 223
 224                         /* Actually dereference the alias */
 225                         BDB_IDL_ZERO(tmp);
 226                         a = deref_base( op, rs, a, &matched, locker, &lockr,
 227                                 tmp, visited );
 228                         if (a) {
 229                                 /* If the target was not already in our current candidates,
 230                                  * make note of it in the newsubs list. Also
 231                                  * set it in the scopes list so that bdb_search
 232                                  * can check it.
 233                                  */
 234                                 if (bdb_idl_insert(ids, a->e_id) == 0) {
 235                                         bdb_idl_insert(newsubs, a->e_id);
 236                                         bdb_idl_insert(scopes, a->e_id);
 237                                 }
 238                                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 239                                         a, &lockr);
 240
 241                         } else if (matched) {
 242                                 /* Alias could not be dereferenced, or it deref'd to
 243                                  * an ID we've already seen. Ignore it.
 244                                  */
 245                                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache,
 246                                         matched, &lockr );
 247                                 rs->sr_text = NULL;
 248                         }
 249                 }
 250                 /* If this is a OneLevel search, we're done; oldsubs only had one
 251                  * ID in it. For a Subtree search, oldsubs may be a list of scope IDs.
 252                  */
 253                 if (op->ors_scope != LDAP_SCOPE_SUBTREE) break;
 254 nextido:
 255                 ido = bdb_idl_next( oldsubs, &cursoro );
 256
 257                 /* If we're done processing the old scopes, did we add any new
 258                  * scopes in this iteration? If so, go back and do those now.
 259                  */
 260                 if (ido == NOID) {
 261                         if (BDB_IDL_IS_ZERO(newsubs)) break;
 262                         BDB_IDL_CPY(oldsubs, newsubs);
 263                         BDB_IDL_ZERO(newsubs);
 264                         cursoro = 0;
 265                         ido = bdb_idl_first( oldsubs, &cursoro );
 266                 }
 267
 268                 /* Find the entry corresponding to the next scope. If it can't
 269                  * be found, ignore it and move on. This should never happen;
 270                  * we should never see the ID of an entry that doesn't exist.
 271                  * Set the name so that the scope's IDL can be retrieved.
 272                  */
 273                 ei = NULL;
 274                 rs->sr_err = bdb_cache_find_id(op, NULL, ido, &ei,
 275                         0, locker, &locka );
 276                 if (rs->sr_err != LDAP_SUCCESS) goto nextido;
 277                 e = ei->bei_e;
 278         }
 279         return rs->sr_err;
 280 }
 281
 282 static
 283 int is_sync_protocol( Operation *op )
 284 {
 285         if ( op->o_sync_mode & SLAP_SYNC_REFRESH_AND_PERSIST )
 286                 return 1;
 287         return 0;
 288 }
 289
 290 #define IS_BDB_REPLACE(type) (( type == LDAP_PSEARCH_BY_DELETE ) || \
 291         ( type == LDAP_PSEARCH_BY_SCOPEOUT ))
 292 #define IS_PSEARCH (op != sop)
 293
 294 int
 295 bdb_abandon( Operation *op, SlapReply *rs )
 296 {
 297         Operation       *ps_list;
 298         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 299
 300         LDAP_LIST_FOREACH ( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 301                 if ( ps_list->o_connid == op->o_connid ) {
 302                         if ( ps_list->o_msgid == op->oq_abandon.rs_msgid ) {
 303                                 ps_list->o_abandon = 1;
 304                                 LDAP_LIST_REMOVE( ps_list, o_ps_link );
 305                                 slap_op_free ( ps_list );
 306                                 return LDAP_SUCCESS;
 307                         }
 308                 }
 309         }
 310         return LDAP_UNAVAILABLE;
 311 }
 312
 313 int
 314 bdb_cancel( Operation *op, SlapReply *rs )
 315 {
 316         Operation       *ps_list;
 317         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 318
 319         LDAP_LIST_FOREACH ( ps_list, &bdb->bi_psearch_list, o_ps_link ) {
 320                 if ( ps_list->o_connid == op->o_connid ) {
 321                         if ( ps_list->o_msgid == op->oq_cancel.rs_msgid ) {
 322                                 ps_list->o_cancel = SLAP_CANCEL_DONE;
 323                                 LDAP_LIST_REMOVE( ps_list, o_ps_link );
 324
 325                                 rs->sr_err = LDAP_CANCELLED;
 326                                 send_ldap_result( ps_list, rs );
 327
 328                                 if ( ps_list->o_tmpmemctx ) {
 329                                         sl_mem_destroy( NULL, ps_list->o_tmpmemctx );
 330                                 }
 331
 332                                 slap_op_free ( ps_list );
 333                                 return LDAP_SUCCESS;
 334                         }
 335                 }
 336         }
 337         return LDAP_UNAVAILABLE;
 338 }
 339
 340 int bdb_search( Operation *op, SlapReply *rs )
 341 {
 342         return bdb_do_search( op, rs, op, NULL, 0 );
 343 }
 344
 345 /* For persistent searches, op is the currently executing operation,
 346  * sop is the persistent search. For regular searches, sop = op.
 347  */
 348 int
 349 bdb_do_search( Operation *op, SlapReply *rs, Operation *sop,
 350         Entry *ps_e, int ps_type )
 351 {
 352         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
 353         time_t          stoptime;
 354         ID              id, cursor;
 355         ID              candidates[BDB_IDL_UM_SIZE];
 356         ID              scopes[BDB_IDL_DB_SIZE];
 357         Entry           *e = NULL, base;
 358         Entry   *matched = NULL;
 359         EntryInfo       *ei;
 360         struct berval   realbase = { 0, NULL };
 361         int             manageDSAit;
 362         int             tentries = 0;
 363         ID              lastid = NOID;
 364         AttributeName   *attrs;
 365
 366         Filter          contextcsnand, contextcsnle, cookief, csnfnot, csnfeq, csnfand, csnfge;
 367         Filter          omitcsnf, omitcsnfle;
 368         AttributeAssertion aa_ge, aa_eq, aa_le;
 369         int             entry_count = 0;
 370         struct berval *search_context_csn = NULL;
 371         DB_LOCK         ctxcsn_lock;
 372         LDAPControl     *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
 373         int             num_ctrls = 0;
 374         AttributeName   uuid_attr[2];
 375         int             rc_sync = 0;
 376         int             entry_sync_state = -1;
 377         AttributeName   null_attr;
 378         int             no_sync_state_change = 0;
 379         struct slap_limits_set *limit = NULL;
 380         int isroot = 0;
 381
 382         u_int32_t       locker = 0;
 383         DB_LOCK         lock;
 384
 385 #ifdef NEW_LOGGING
 386         LDAP_LOG( OPERATION, ENTRY, "bdb_back_search\n", 0, 0, 0 );
 387 #else
 388         Debug( LDAP_DEBUG_TRACE, "=> bdb_back_search\n",
 389                 0, 0, 0);
 390 #endif
 391         attrs = sop->oq_search.rs_attrs;
 392
 393         /* psearch needs to be registered before refresh begins */
 394         /* psearch and refresh transmission is serialized in send_ldap_ber() */
 395         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
 396                 LDAP_LIST_INSERT_HEAD( &bdb->bi_psearch_list, sop, o_ps_link );
 397         }
 398         null_attr.an_desc = NULL;
 399         null_attr.an_oc = NULL;
 400         null_attr.an_name.bv_len = 0;
 401         null_attr.an_name.bv_val = NULL;
 402
 403         for( num_ctrls = 0; num_ctrls < SLAP_MAX_RESPONSE_CONTROLS; num_ctrls++ ) {
 404                 ctrls[num_ctrls] = NULL;
 405         }
 406         num_ctrls = 0;
 407
 408         if ( IS_PSEARCH && IS_BDB_REPLACE(ps_type)) {
 409                 attrs = uuid_attr;
 410                 attrs[0].an_desc = NULL;
 411                 attrs[0].an_oc = NULL;
 412                 attrs[0].an_name.bv_len = 0;
 413                 attrs[0].an_name.bv_val = NULL;
 414         }
 415
 416         manageDSAit = get_manageDSAit( sop );
 417
 418         /* Sync control overrides manageDSAit */
 419
 420         if ( !IS_PSEARCH && sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
 421                 if ( manageDSAit == SLAP_NO_CONTROL )
 422                         manageDSAit = SLAP_CRITICAL_CONTROL;
 423         } else if ( IS_PSEARCH ) {
 424                 if ( manageDSAit == SLAP_NO_CONTROL )
 425                         manageDSAit = SLAP_CRITICAL_CONTROL;
 426         }
 427
 428         rs->sr_err = LOCK_ID (bdb->bi_dbenv, &locker );
 429
 430         switch(rs->sr_err) {
 431         case 0:
 432                 break;
 433         default:
 434                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 435                 return rs->sr_err;
 436         }
 437
 438         if ( sop->o_req_ndn.bv_len == 0 ) {
 439                 /* DIT root special case */
 440                 e = (Entry *) &slap_entry_root;
 441                 rs->sr_err = LDAP_SUCCESS;
 442         } else {
 443 dn2entry_retry:
 444                 /* get entry with reader lock */
 445                 rs->sr_err = bdb_dn2entry( op, NULL, &sop->o_req_ndn, &ei,
 446                         1, locker, &lock );
 447         }
 448
 449         switch(rs->sr_err) {
 450         case DB_NOTFOUND:
 451                 matched = ei->bei_e; break;
 452         case 0:
 453                 e = ei->bei_e; break;
 454         case LDAP_BUSY:
 455                 send_ldap_error( sop, rs, LDAP_BUSY, "ldap server busy" );
 456                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 457                 return LDAP_BUSY;
 458         case DB_LOCK_DEADLOCK:
 459         case DB_LOCK_NOTGRANTED:
 460                 goto dn2entry_retry;
 461         default:
 462                 send_ldap_error( sop, rs, LDAP_OTHER, "internal error" );
 463                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 464                 return rs->sr_err;
 465         }
 466
 467         if ( e && (op->ors_deref & LDAP_DEREF_FINDING) && is_entry_alias(e) ) {
 468                 BDB_IDL_ZERO(candidates);
 469                 e = deref_base( op, rs, e, &matched, locker, &lock,
 470                         candidates, NULL );
 471         }
 472
 473         if ( e == NULL ) {
 474                 struct berval matched_dn = { 0, NULL };
 475
 476                 if ( matched != NULL ) {
 477                         BerVarray erefs;
 478                         ber_dupbv( &matched_dn, &matched->e_name );
 479
 480                         erefs = is_entry_referral( matched )
 481                                 ? get_entry_referrals( op, matched )
 482                                 : NULL;
 483
 484                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
 485                                 matched, &lock);
 486                         matched = NULL;
 487
 488                         if( erefs ) {
 489                                 rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 490                                         &sop->o_req_dn, sop->oq_search.rs_scope );
 491                                 ber_bvarray_free( erefs );
 492                         }
 493
 494                 } else {
 495                         rs->sr_ref = referral_rewrite( default_referral,
 496                                 NULL, &sop->o_req_dn, sop->oq_search.rs_scope );
 497                 }
 498
 499                 rs->sr_err = LDAP_REFERRAL;
 500                 rs->sr_matched = matched_dn.bv_val;
 501                 send_ldap_result( sop, rs );
 502
 503                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 504                 if ( rs->sr_ref ) {
 505                         ber_bvarray_free( rs->sr_ref );
 506                         rs->sr_ref = NULL;
 507                 }
 508                 if ( matched_dn.bv_val ) {
 509                         ber_memfree( matched_dn.bv_val );
 510                         rs->sr_matched = NULL;
 511                 }
 512                 return rs->sr_err;
 513         }
 514
 515         if (!manageDSAit && e != &slap_entry_root && is_entry_referral( e ) ) {
 516                 /* entry is a referral, don't allow add */
 517                 struct berval matched_dn;
 518                 BerVarray erefs;
 519
 520                 ber_dupbv( &matched_dn, &e->e_name );
 521                 erefs = get_entry_referrals( op, e );
 522
 523                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 524                 e = NULL;
 525
 526                 if( erefs ) {
 527                         rs->sr_ref = referral_rewrite( erefs, &matched_dn,
 528                                 &sop->o_req_dn, sop->oq_search.rs_scope );
 529                         ber_bvarray_free( erefs );
 530                 }
 531
 532 #ifdef NEW_LOGGING
 533                 LDAP_LOG ( OPERATION, RESULTS,
 534                         "bdb_search: entry is referral\n", 0, 0, 0 );
 535 #else
 536                 Debug( LDAP_DEBUG_TRACE, "bdb_search: entry is referral\n",
 537                         0, 0, 0 );
 538 #endif
 539
 540                 if (!rs->sr_ref) rs->sr_text = "bad_referral object";
 541                 rs->sr_err = LDAP_REFERRAL;
 542                 rs->sr_matched = matched_dn.bv_val;
 543                 send_ldap_result( sop, rs );
 544
 545                 LOCK_ID_FREE (bdb->bi_dbenv, locker );
 546                 ber_bvarray_free( rs->sr_ref );
 547                 rs->sr_ref = NULL;
 548                 ber_memfree( matched_dn.bv_val );
 549                 rs->sr_matched = NULL;
 550                 return 1;
 551         }
 552
 553         if ( get_assert( op ) &&
 554                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 555         {
 556                 rs->sr_err = LDAP_ASSERTION_FAILED;
 557                 send_ldap_result( sop, rs );
 558                 return 1;
 559         }
 560
 561         /* if not root, get appropriate limits */
 562         if ( be_isroot( op->o_bd, &sop->o_ndn ) ) {
 563                 isroot = 1;
 564         } else {
 565                 ( void ) get_limits( op->o_bd, &sop->o_ndn, &limit );
 566         }
 567
 568         /* The time/size limits come first because they require very little
 569          * effort, so there's no chance the candidates are selected and then
 570          * the request is not honored only because of time/size constraints */
 571
 572         /* if no time limit requested, use soft limit (unless root!) */
 573         if ( isroot ) {
 574                 if ( sop->oq_search.rs_tlimit == 0 ) {
 575                         sop->oq_search.rs_tlimit = -1;  /* allow root to set no limit */
 576                 }
 577
 578                 if ( sop->oq_search.rs_slimit == 0 ) {
 579                         sop->oq_search.rs_slimit = -1;
 580                 }
 581
 582         } else {
 583                 /* if no limit is required, use soft limit */
 584                 if ( sop->oq_search.rs_tlimit <= 0 ) {
 585                         sop->oq_search.rs_tlimit = limit->lms_t_soft;
 586
 587                 /* if requested limit higher than hard limit, abort */
 588                 } else if ( sop->oq_search.rs_tlimit > limit->lms_t_hard ) {
 589                         /* no hard limit means use soft instead */
 590                         if ( limit->lms_t_hard == 0
 591                                         && limit->lms_t_soft > -1
 592                                         && sop->oq_search.rs_tlimit > limit->lms_t_soft ) {
 593                                 sop->oq_search.rs_tlimit = limit->lms_t_soft;
 594
 595                         /* positive hard limit means abort */
 596                         } else if ( limit->lms_t_hard > 0 ) {
 597                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 598                                 send_ldap_result( sop, rs );
 599                                 rs->sr_err = LDAP_SUCCESS;
 600                                 goto done;
 601                         }
 602
 603                         /* negative hard limit means no limit */
 604                 }
 605
 606                 /* if no limit is required, use soft limit */
 607                 if ( sop->oq_search.rs_slimit <= 0 ) {
 608                         if ( get_pagedresults(sop) && limit->lms_s_pr != 0 ) {
 609                                 sop->oq_search.rs_slimit = limit->lms_s_pr;
 610                         } else {
 611                                 sop->oq_search.rs_slimit = limit->lms_s_soft;
 612                         }
 613
 614                 /* if requested limit higher than hard limit, abort */
 615                 } else if ( sop->oq_search.rs_slimit > limit->lms_s_hard ) {
 616                         /* no hard limit means use soft instead */
 617                         if ( limit->lms_s_hard == 0
 618                                         && limit->lms_s_soft > -1
 619                                         && sop->oq_search.rs_slimit > limit->lms_s_soft ) {
 620                                 sop->oq_search.rs_slimit = limit->lms_s_soft;
 621
 622                         /* positive hard limit means abort */
 623                         } else if ( limit->lms_s_hard > 0 ) {
 624                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 625                                 send_ldap_result( sop, rs );
 626                                 rs->sr_err = LDAP_SUCCESS;
 627                                 goto done;
 628                         }
 629
 630                         /* negative hard limit means no limit */
 631                 }
 632         }
 633
 634         /* compute it anyway; root does not use it */
 635         stoptime = op->o_time + sop->oq_search.rs_tlimit;
 636
 637         /* need normalized dn below */
 638         ber_dupbv( &realbase, &e->e_nname );
 639
 640         /* Copy info to base, must free entry before accessing the database
 641          * in search_candidates, to avoid deadlocks.
 642          */
 643         base.e_private = e->e_private;
 644         base.e_nname = realbase;
 645         base.e_id = e->e_id;
 646
 647         if ( e != &slap_entry_root ) {
 648                 bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 649         }
 650         e = NULL;
 651
 652         rs->sr_err = bdb_get_commit_csn( sop, rs, &search_context_csn, locker, &ctxcsn_lock );
 653
 654         if ( rs->sr_err != LDAP_SUCCESS ) {
 655                 send_ldap_error( sop, rs, rs->sr_err, "error in csn management in search" );
 656                 goto done;
 657         }
 658
 659         /* select candidates */
 660         if ( sop->oq_search.rs_scope == LDAP_SCOPE_BASE ) {
 661                 rs->sr_err = base_candidate( op->o_bd, &base, candidates );
 662
 663         } else {
 664                 BDB_IDL_ZERO( candidates );
 665                 BDB_IDL_ZERO( scopes );
 666                 rs->sr_err = search_candidates( op, sop, rs, &base, locker, candidates, scopes );
 667         }
 668
 669         if ( sop->o_sync_mode != SLAP_SYNC_NONE ) {
 670                 bdb_cache_entry_db_unlock( bdb->bi_dbenv, &ctxcsn_lock );
 671         }
 672
 673         /* start cursor at beginning of candidates.
 674          */
 675         cursor = 0;
 676         if (IS_PSEARCH) {
 677                 if ( !BDB_IDL_IS_RANGE( candidates ) ) {
 678                         cursor = bdb_idl_search( candidates, ps_e->e_id );
 679                         if ( candidates[cursor] != ps_e->e_id ) {
 680                                 rs->sr_err = LDAP_SUCCESS;
 681                                 goto done;
 682                         }
 683                 } else {
 684                         if ( ps_e->e_id < BDB_IDL_RANGE_FIRST(candidates)
 685                            || ps_e->e_id > BDB_IDL_RANGE_LAST(candidates)){
 686                                 rs->sr_err = LDAP_SUCCESS;
 687                                 goto done;
 688                         }
 689                 }
 690                 candidates[0] = 1;
 691                 candidates[1] = ps_e->e_id;
 692         }
 693
 694         if ( candidates[0] == 0 ) {
 695 #ifdef NEW_LOGGING
 696                 LDAP_LOG ( OPERATION, RESULTS,
 697                         "bdb_search: no candidates\n", 0, 0, 0 );
 698 #else
 699                 Debug( LDAP_DEBUG_TRACE, "bdb_search: no candidates\n",
 700                         0, 0, 0 );
 701 #endif
 702
 703                 rs->sr_err = LDAP_SUCCESS;
 704                 rs->sr_entry = NULL;
 705                 send_ldap_result( sop, rs );
 706                 goto done;
 707         }
 708
 709         /* if not root and candidates exceed to-be-checked entries, abort */
 710         if ( !isroot && limit->lms_s_unchecked != -1 ) {
 711                 if ( BDB_IDL_N(candidates) > (unsigned) limit->lms_s_unchecked ) {
 712                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 713                         send_ldap_result( sop, rs );
 714                         rs->sr_err = LDAP_SUCCESS;
 715                         goto done;
 716                 }
 717         }
 718
 719         if ( isroot || !limit->lms_s_pr_hide ) {
 720                 tentries = BDB_IDL_N(candidates);
 721         }
 722
 723 #ifdef LDAP_CONTROL_PAGEDRESULTS
 724         if ( get_pagedresults(sop) ) {
 725                 if ( sop->o_pagedresults_state.ps_cookie == 0 ) {
 726                         id = 0;
 727                 } else {
 728                         if ( sop->o_pagedresults_size == 0 ) {
 729                                 rs->sr_err = LDAP_SUCCESS;
 730                                 rs->sr_text = "search abandoned by pagedResult size=0";
 731                                 send_ldap_result( sop, rs );
 732                                 goto done;
 733                         }
 734                         for ( id = bdb_idl_first( candidates, &cursor );
 735                                 id != NOID && id <= (ID)( sop->o_pagedresults_state.ps_cookie );
 736                                 id = bdb_idl_next( candidates, &cursor ) );
 737                 }
 738                 if ( cursor == NOID ) {
 739 #ifdef NEW_LOGGING
 740                         LDAP_LOG ( OPERATION, RESULTS,
 741                                 "bdb_search: no paged results candidates\n",
 742                         0, 0, 0 );
 743 #else
 744                         Debug( LDAP_DEBUG_TRACE,
 745                                 "bdb_search: no paged results candidates\n",
 746                                 0, 0, 0 );
 747 #endif
 748                         send_pagerequest_response( sop, rs, lastid, 0 );
 749
 750                         rs->sr_err = LDAP_OTHER;
 751                         goto done;
 752                 }
 753                 goto loop_begin;
 754         }
 755 #endif
 756
 757         if ( (sop->o_sync_mode & SLAP_SYNC_REFRESH) || IS_PSEARCH )
 758         {
 759                 MatchingRule    *mr;
 760                 const char              *text;
 761                 int                             match;
 762
 763                 cookief.f_choice = LDAP_FILTER_AND;
 764                 cookief.f_and = &csnfnot;
 765                 cookief.f_next = NULL;
 766
 767                 csnfnot.f_choice = LDAP_FILTER_NOT;
 768                 csnfnot.f_not = &csnfeq;
 769                 csnfnot.f_next = &csnfand;
 770
 771                 csnfeq.f_choice = LDAP_FILTER_EQUALITY;
 772                 csnfeq.f_ava = &aa_eq;
 773                 csnfeq.f_av_desc = slap_schema.si_ad_entryCSN;
 774                 csnfeq.f_av_value = sop->o_sync_state;
 775
 776                 csnfand.f_choice = LDAP_FILTER_AND;
 777                 csnfand.f_and = &csnfge;
 778                 csnfand.f_next = NULL;
 779
 780                 csnfge.f_choice = LDAP_FILTER_GE;
 781                 csnfge.f_ava = &aa_ge;
 782                 csnfge.f_av_desc = slap_schema.si_ad_entryCSN;
 783                 csnfge.f_av_value = sop->o_sync_state;
 784
 785                 if ( search_context_csn && !IS_PSEARCH ) {
 786                         csnfge.f_next = &contextcsnand;
 787
 788                         contextcsnand.f_choice = LDAP_FILTER_AND;
 789                         contextcsnand.f_and = &contextcsnle;
 790                         contextcsnand.f_next = NULL;
 791
 792                         contextcsnle.f_choice = LDAP_FILTER_LE;
 793                         contextcsnle.f_ava = &aa_le;
 794                         contextcsnle.f_av_desc = slap_schema.si_ad_entryCSN;
 795                         contextcsnle.f_av_value = *search_context_csn;
 796                         contextcsnle.f_next = sop->oq_search.rs_filter;
 797
 798                         mr = slap_schema.si_ad_entryCSN->ad_type->sat_ordering;
 799                         if ( sop->o_sync_state.bv_len != 0 ) {
 800                                 value_match( &match, slap_schema.si_ad_entryCSN, mr,
 801                                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 802                                                         &sop->o_sync_state, search_context_csn, &text );
 803                         } else {
 804                                 match = -1;
 805                         }
 806                         no_sync_state_change = !match;
 807                 } else {
 808                         csnfge.f_next = sop->oq_search.rs_filter;
 809                 }
 810         }
 811
 812         for ( id = bdb_idl_first( candidates, &cursor );
 813                 id != NOID;
 814                 id = bdb_idl_next( candidates, &cursor ) )
 815         {
 816                 int             scopeok = 0;
 817
 818 loop_begin:
 819                 /* check for abandon */
 820                 if ( sop->o_abandon ) {
 821                         rs->sr_err = LDAP_SUCCESS;
 822                         goto done;
 823                 }
 824
 825 #ifdef LDAP_EXOP_X_CANCEL
 826                 if ( sop->o_cancel ) {
 827                         assert( sop->o_cancel == SLAP_CANCEL_REQ );
 828                         rs->sr_err = LDAP_CANCELLED;
 829                         send_ldap_result( sop, rs );
 830                         sop->o_cancel = SLAP_CANCEL_ACK;
 831                         rs->sr_err = LDAP_SUCCESS;
 832                         goto done;
 833                 }
 834 #endif
 835
 836                 /* check time limit */
 837                 if ( sop->oq_search.rs_tlimit != -1 && slap_get_time() > stoptime ) {
 838                         rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
 839                         rs->sr_ref = rs->sr_v2ref;
 840                         send_ldap_result( sop, rs );
 841                         rs->sr_err = LDAP_SUCCESS;
 842                         goto done;
 843                 }
 844
 845
 846                 if (!IS_PSEARCH) {
 847 id2entry_retry:
 848                         /* get the entry with reader lock */
 849                         ei = NULL;
 850                         rs->sr_err = bdb_cache_find_id( op, NULL,
 851                                 id, &ei, 0, locker, &lock );
 852
 853                         if (rs->sr_err == LDAP_BUSY) {
 854                                 rs->sr_text = "ldap server busy";
 855                                 send_ldap_result( sop, rs );
 856                                 goto done;
 857
 858                         } else if ( rs->sr_err == DB_LOCK_DEADLOCK
 859                                 || rs->sr_err == DB_LOCK_NOTGRANTED )
 860                         {
 861                                 goto id2entry_retry;
 862                         }
 863
 864                         if ( ei && rs->sr_err == LDAP_SUCCESS ) {
 865                                 e = ei->bei_e;
 866                         } else {
 867                                 e = NULL;
 868                         }
 869
 870                         if ( e == NULL ) {
 871                                 if( !BDB_IDL_IS_RANGE(candidates) ) {
 872                                         /* only complain for non-range IDLs */
 873 #ifdef NEW_LOGGING
 874                                         LDAP_LOG ( OPERATION, RESULTS,
 875                                                 "bdb_search: candidate %ld not found\n",
 876                                                 (long) id, 0, 0);
 877 #else
 878                                         Debug( LDAP_DEBUG_TRACE,
 879                                                 "bdb_search: candidate %ld not found\n",
 880                                                 (long) id, 0, 0 );
 881 #endif
 882                                 }
 883
 884                                 goto loop_continue;
 885                         }
 886                 } else {
 887                         e = ps_e;
 888                 }
 889
 890                 rs->sr_entry = e;
 891 #ifdef BDB_SUBENTRIES
 892                 /* FIXME: send all but syncrepl
 893                 if ( !is_sync_protocol( sop ) ) {
 894                 */
 895                         if ( is_entry_subentry( e ) ) {
 896                                 if( sop->oq_search.rs_scope != LDAP_SCOPE_BASE ) {
 897                                         if(!get_subentries_visibility( sop )) {
 898                                                 /* only subentries are visible */
 899                                                 goto loop_continue;
 900                                         }
 901
 902                                 } else if ( get_subentries( sop ) &&
 903                                         !get_subentries_visibility( sop ))
 904                                 {
 905                                         /* only subentries are visible */
 906                                         goto loop_continue;
 907                                 }
 908
 909                         } else if ( get_subentries_visibility( sop )) {
 910                                 /* only subentries are visible */
 911                                 goto loop_continue;
 912                         }
 913                 /*
 914                 }
 915                 */
 916 #endif
 917
 918                 /* Does this candidate actually satisfy the search scope?
 919                  *
 920                  * Note that we don't lock access to the bei_parent pointer.
 921                  * Since only leaf nodes can be deleted, the parent of any
 922                  * node will always be a valid node. Also since we have
 923                  * a Read lock on the data, it cannot be renamed out of the
 924                  * scope while we are looking at it, and unless we're using
 925                  * BDB_HIER, its parents cannot be moved either.
 926                  */
 927                 switch( sop->ors_scope ) {
 928                 case LDAP_SCOPE_BASE:
 929                         /* This is always true, yes? */
 930                         if ( id == base.e_id )
 931                                 scopeok = 1;
 932                         break;
 933                 case LDAP_SCOPE_ONELEVEL:
 934                         if ( ei->bei_parent->bei_id == base.e_id )
 935                                 scopeok = 1;
 936                         break;
 937                 case LDAP_SCOPE_SUBTREE:
 938                         { EntryInfo *tmp;
 939                         for ( tmp = BEI(e); tmp->bei_parent;
 940                                 tmp = tmp->bei_parent ) {
 941                                 if ( tmp->bei_id == base.e_id ) {
 942                                         scopeok = 1;
 943                                         break;
 944                                 }
 945                         } }
 946                         break;
 947                 }
 948
 949 #ifdef BDB_ALIASES
 950                 /* aliases were already dereferenced in candidate list */
 951                 if ( sop->ors_deref & LDAP_DEREF_SEARCHING ) {
 952                         /* but if the search base is an alias, and we didn't
 953                          * deref it when finding, return it.
 954                          */
 955                         if ( is_entry_alias(e) &&
 956                                 ((sop->ors_deref & LDAP_DEREF_FINDING)
 957                                   || !bvmatch(&e->e_nname, &op->o_req_ndn)))
 958                         {
 959                                 goto loop_continue;
 960                         }
 961
 962                         /* scopes is only non-empty for onelevel or subtree */
 963                         if ( !scopeok && BDB_IDL_N(scopes) ) {
 964                                 unsigned x;
 965                                 if ( sop->ors_scope == LDAP_SCOPE_ONELEVEL ) {
 966                                         x = bdb_idl_search( scopes,
 967                                                 e->e_id );
 968                                         if ( scopes[x] == e->e_id )
 969                                                 scopeok = 1;
 970                                 } else {
 971                                 /* subtree, walk up the tree */
 972                                         EntryInfo *tmp = BEI(e);
 973                                         for (;tmp->bei_parent;
 974                                                 tmp=tmp->bei_parent) {
 975                                                 x = bdb_idl_search(
 976                                                         scopes, tmp->bei_id );
 977                                                 if ( scopes[x] == tmp->bei_id ) {
 978                                                         scopeok = 1;
 979                                                         break;
 980                                                 }
 981                                         }
 982                                 }
 983                         }
 984                 }
 985 #endif
 986
 987                 /* Not in scope, ignore it */
 988                 if ( !scopeok ) {
 989 #ifdef NEW_LOGGING
 990                         LDAP_LOG ( OPERATION, RESULTS,
 991                                 "bdb_search: %ld scope not okay\n",
 992                                 (long) id, 0, 0);
 993 #else
 994                         Debug( LDAP_DEBUG_TRACE,
 995                                 "bdb_search: %ld scope not okay\n",
 996                                 (long) id, 0, 0 );
 997 #endif
 998                         goto loop_continue;
 999                 }
1000
1001                 /*
1002                  * if it's a referral, add it to the list of referrals. only do
1003                  * this for non-base searches, and don't check the filter
1004                  * explicitly here since it's only a candidate anyway.
1005                  */
1006                 if ( !manageDSAit && sop->oq_search.rs_scope != LDAP_SCOPE_BASE
1007                         && is_entry_referral( e ) )
1008                 {
1009                         BerVarray erefs = get_entry_referrals( sop, e );
1010                         rs->sr_ref = referral_rewrite( erefs,
1011                                 &e->e_name, NULL,
1012                                 sop->oq_search.rs_scope == LDAP_SCOPE_SUBTREE
1013                                         ? LDAP_SCOPE_SUBTREE
1014                                         : LDAP_SCOPE_BASE );
1015
1016                         send_search_reference( sop, rs );
1017
1018                         ber_bvarray_free( rs->sr_ref );
1019                         ber_bvarray_free( erefs );
1020                         rs->sr_ref = NULL;
1021
1022                         goto loop_continue;
1023                 }
1024
1025                 if ( !manageDSAit && is_entry_glue( e )) {
1026                         goto loop_continue;
1027                 }
1028
1029                 /* if it matches the filter and scope, send it */
1030                 if (IS_PSEARCH) {
1031                         if (ps_type != LDAP_PSEARCH_BY_SCOPEOUT) {
1032                                 rs->sr_err = test_filter( sop, rs->sr_entry, &cookief );
1033                         } else {
1034                                 rs->sr_err = LDAP_COMPARE_TRUE;
1035                         }
1036                 } else {
1037                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1038                                 rc_sync = test_filter( sop, rs->sr_entry, &cookief );
1039                                 rs->sr_err = test_filter( sop,
1040                                         rs->sr_entry, &contextcsnand );
1041                                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1042                                         if ( rc_sync == LDAP_COMPARE_TRUE ) {
1043                                                 if ( no_sync_state_change ) {
1044 #ifdef NEW_LOGGING
1045                                                         LDAP_LOG ( OPERATION, RESULTS,
1046                                                                 "bdb_search: error in context csn management\n",
1047                                                                 0, 0, 0 );
1048 #else
1049                                                         Debug( LDAP_DEBUG_TRACE,
1050                                                                 "bdb_search: error in context csn management\n",
1051                                                                 0, 0, 0 );
1052 #endif
1053                                                 }
1054                                                 entry_sync_state = LDAP_SYNC_ADD;
1055                                         } else {
1056                                                 if ( no_sync_state_change ) {
1057                                                         goto loop_continue;
1058                                                 }
1059                                                 entry_sync_state = LDAP_SYNC_PRESENT;
1060                                         }
1061                                 }
1062                         } else {
1063                                 rs->sr_err = test_filter( sop,
1064                                         rs->sr_entry, sop->oq_search.rs_filter );
1065                         }
1066                 }
1067
1068                 if ( rs->sr_err == LDAP_COMPARE_TRUE ) {
1069                         /* check size limit */
1070                         if ( --sop->oq_search.rs_slimit == -1 ) {
1071                                 if (!IS_PSEARCH) {
1072                                         bdb_cache_return_entry_r( bdb->bi_dbenv,
1073                                                 &bdb->bi_cache, e, &lock );
1074                                 }
1075                                 e = NULL;
1076                                 rs->sr_entry = NULL;
1077                                 rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
1078                                 rs->sr_ref = rs->sr_v2ref;
1079                                 send_ldap_result( sop, rs );
1080                                 rs->sr_err = LDAP_SUCCESS;
1081                                 goto done;
1082                         }
1083
1084 #ifdef LDAP_CONTROL_PAGEDRESULTS
1085                         if ( get_pagedresults(sop) ) {
1086                                 if ( rs->sr_nentries >= sop->o_pagedresults_size ) {
1087                                         send_pagerequest_response( sop, rs,
1088                                                 lastid, tentries );
1089                                         goto done;
1090                                 }
1091                                 lastid = id;
1092                         }
1093 #endif
1094
1095                         if (e) {
1096                                 /* safe default */
1097                                 int result = -1;
1098
1099 #if 0   /* noop is masked SLAP_CTRL_UPDATE */
1100                                 if( op->o_noop ) {
1101                                         result = 0;
1102                                 } else
1103 #endif
1104                                 if (IS_PSEARCH) {
1105                                         int premodify_found = 0;
1106                                         int entry_sync_state;
1107
1108                                         if ( ps_type == LDAP_PSEARCH_BY_ADD ||
1109                                                  ps_type == LDAP_PSEARCH_BY_DELETE ||
1110                                                  ps_type == LDAP_PSEARCH_BY_MODIFY ||
1111                                                  ps_type == LDAP_PSEARCH_BY_SCOPEOUT )
1112                                         {
1113                                                 if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1114                                                         struct psid_entry* psid_e;
1115                                                         LDAP_LIST_FOREACH( psid_e,
1116                                                                 &op->o_pm_list, ps_link)
1117                                                         {
1118                                                                 if( psid_e->ps_op == sop ) {
1119                                                                         premodify_found = 1;
1120                                                                         LDAP_LIST_REMOVE(psid_e, ps_link);
1121                                                                         break;
1122                                                                 }
1123                                                         }
1124                                                         if (psid_e != NULL) free (psid_e);
1125                                                 }
1126                                                 if ( ps_type == LDAP_PSEARCH_BY_ADD ) {
1127                                                         entry_sync_state = LDAP_SYNC_ADD;
1128                                                 } else if ( ps_type == LDAP_PSEARCH_BY_DELETE ) {
1129                                                         entry_sync_state = LDAP_SYNC_DELETE;
1130                                                 } else if ( ps_type == LDAP_PSEARCH_BY_MODIFY ) {
1131                                                         if ( premodify_found ) {
1132                                                                 entry_sync_state = LDAP_SYNC_MODIFY;
1133                                                         } else {
1134                                                                 entry_sync_state = LDAP_SYNC_ADD;
1135                                                         }
1136                                                 } else if ( ps_type == LDAP_PSEARCH_BY_SCOPEOUT )
1137                                                         entry_sync_state = LDAP_SYNC_DELETE;
1138                                                 else {
1139                                                         rs->sr_err = LDAP_OTHER;
1140                                                         goto done;
1141                                                 }
1142                                                 rs->sr_err = bdb_build_sync_state_ctrl( sop,
1143                                                         rs, e, entry_sync_state, ctrls,
1144                                                         num_ctrls++, 1, search_context_csn );
1145                                                 if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1146                                                 rs->sr_attrs = attrs;
1147                                                 rs->sr_ctrls = ctrls;
1148                                                 result = send_search_entry( sop, rs );
1149                                                 ch_free( ctrls[num_ctrls-1]->ldctl_value.bv_val );
1150                                                 ch_free( ctrls[--num_ctrls] );
1151                                                 ctrls[num_ctrls] = NULL;
1152                                                 rs->sr_ctrls = NULL;
1153
1154                                         } else if ( ps_type == LDAP_PSEARCH_BY_PREMODIFY ) {
1155                                                 struct psid_entry* psid_e;
1156                                                 psid_e = (struct psid_entry *) calloc (1,
1157                                                         sizeof(struct psid_entry));
1158                                                 psid_e->ps_op = sop;
1159                                                 LDAP_LIST_INSERT_HEAD( &op->o_pm_list,
1160                                                         psid_e, ps_link );
1161
1162                                         } else {
1163                                                 printf("Error !\n");
1164                                         }
1165                                 } else {
1166                                         if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1167                                                 rs->sr_err = bdb_build_sync_state_ctrl( sop,
1168                                                         rs, e, entry_sync_state, ctrls,
1169                                                         num_ctrls++, 0, search_context_csn );
1170                                                 if ( rs->sr_err != LDAP_SUCCESS ) goto done;
1171
1172                                                 rs->sr_ctrls = ctrls;
1173                                                 if ( rc_sync == LDAP_COMPARE_TRUE ) { /* ADD */
1174                                                         rs->sr_attrs = sop->oq_search.rs_attrs;
1175                                                 } else { /* PRESENT */
1176                                                         rs->sr_attrs = &null_attr;
1177                                                 }
1178                                                 result = send_search_entry( sop, rs );
1179                                                 ch_free( ctrls[num_ctrls-1]->ldctl_value.bv_val );
1180                                                 ch_free( ctrls[--num_ctrls] );
1181                                                 ctrls[num_ctrls] = NULL;
1182                                                 rs->sr_ctrls = NULL;
1183                                         } else {
1184                                                 rs->sr_attrs = sop->oq_search.rs_attrs;
1185                                                 rs->sr_ctrls = NULL;
1186                                                 result = send_search_entry( sop, rs );
1187                                         }
1188                                 }
1189
1190                                 switch (result) {
1191                                 case 0:         /* entry sent ok */
1192                                         break;
1193                                 case 1:         /* entry not sent */
1194                                         break;
1195                                 case -1:        /* connection closed */
1196                                         if (!IS_PSEARCH)
1197                                         bdb_cache_return_entry_r(bdb->bi_dbenv,
1198                                                 &bdb->bi_cache, e, &lock);
1199                                         e = NULL;
1200                                         rs->sr_entry = NULL;
1201                                         rs->sr_err = LDAP_OTHER;
1202                                         goto done;
1203                                 }
1204                         }
1205                 } else {
1206 #ifdef NEW_LOGGING
1207                         LDAP_LOG ( OPERATION, RESULTS,
1208                                 "bdb_search: %ld does not match filter\n", (long) id, 0, 0);
1209 #else
1210                         Debug( LDAP_DEBUG_TRACE,
1211                                 "bdb_search: %ld does not match filter\n",
1212                                 (long) id, 0, 0 );
1213 #endif
1214                 }
1215
1216 loop_continue:
1217                 if( e != NULL ) {
1218                         /* free reader lock */
1219                         if (!IS_PSEARCH) {
1220                                 bdb_cache_return_entry_r( bdb->bi_dbenv,
1221                                         &bdb->bi_cache, e , &lock );
1222                                 if ( sop->o_nocaching ) {
1223                                         bdb_cache_delete_entry( bdb, ei, locker, &lock );
1224                                 }
1225                         }
1226                         e = NULL;
1227                         rs->sr_entry = NULL;
1228                 }
1229
1230                 ldap_pvt_thread_yield();
1231         }
1232
1233         if (!IS_PSEARCH) {
1234                 if ( sop->o_sync_mode & SLAP_SYNC_REFRESH ) {
1235                         rs->sr_err = LDAP_SUCCESS;
1236                         rs->sr_rspoid = LDAP_SYNC_INFO;
1237                         rs->sr_ctrls = NULL;
1238                         bdb_send_ldap_intermediate( sop, rs,
1239                                 LDAP_SYNC_STATE_MODE_DONE, search_context_csn );
1240
1241                         /* If changelog is supported, this is where to process it */
1242
1243                         if ( sop->o_sync_mode & SLAP_SYNC_PERSIST ) {
1244                                 /* refreshAndPersist mode */
1245                                 bdb_send_ldap_intermediate( sop, rs,
1246                                         LDAP_SYNC_LOG_MODE_DONE, search_context_csn );
1247                         } else {
1248                                 /* refreshOnly mode */
1249                                 bdb_build_sync_done_ctrl( sop, rs, ctrls,
1250                                         num_ctrls++, 1, search_context_csn );
1251                                 rs->sr_ctrls = ctrls;
1252                                 rs->sr_ref = rs->sr_v2ref;
1253                                 rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS : LDAP_REFERRAL;
1254                                 send_ldap_result( sop, rs );
1255                                 if ( ctrls[num_ctrls-1]->ldctl_value.bv_val != NULL ) {
1256                                         ch_free( ctrls[num_ctrls-1]->ldctl_value.bv_val );
1257                                 }
1258                                 ch_free( ctrls[--num_ctrls] );
1259                                 ctrls[num_ctrls] = NULL;
1260                         }
1261                 } else {
1262                         rs->sr_ctrls = NULL;
1263                         rs->sr_ref = rs->sr_v2ref;
1264                         rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS : LDAP_REFERRAL;
1265                         send_ldap_result( sop, rs );
1266                 }
1267         }
1268
1269         rs->sr_err = LDAP_SUCCESS;
1270
1271 done:
1272         if( !IS_PSEARCH && e != NULL ) {
1273                 /* free reader lock */
1274                 bdb_cache_return_entry_r ( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
1275         }
1276
1277         LOCK_ID_FREE (bdb->bi_dbenv, locker );
1278
1279         ber_bvfree( search_context_csn );
1280
1281         if( rs->sr_v2ref ) {
1282                 ber_bvarray_free( rs->sr_v2ref );
1283                 rs->sr_v2ref = NULL;
1284         }
1285         if( realbase.bv_val ) ch_free( realbase.bv_val );
1286
1287         return rs->sr_err;
1288 }
1289
1290
1291 static int base_candidate(
1292         BackendDB       *be,
1293         Entry   *e,
1294         ID              *ids )
1295 {
1296 #ifdef NEW_LOGGING
1297         LDAP_LOG ( OPERATION, ENTRY,
1298                 "base_candidate: base: \"%s\" (0x%08lx)\n",
1299                 e->e_nname.bv_val, (long) e->e_id, 0);
1300 #else
1301         Debug(LDAP_DEBUG_ARGS, "base_candidates: base: \"%s\" (0x%08lx)\n",
1302                 e->e_nname.bv_val, (long) e->e_id, 0);
1303 #endif
1304
1305         ids[0] = 1;
1306         ids[1] = e->e_id;
1307         return 0;
1308 }
1309
1310 /* Look for "objectClass Present" in this filter.
1311  * Also count depth of filter tree while we're at it.
1312  */
1313 static int oc_filter(
1314         Filter *f,
1315         int cur,
1316         int *max
1317 )
1318 {
1319         int rc = 0;
1320
1321         if( cur > *max ) *max = cur;
1322
1323         switch(f->f_choice) {
1324         case LDAP_FILTER_PRESENT:
1325                 if (f->f_desc == slap_schema.si_ad_objectClass) {
1326                         rc = 1;
1327                 }
1328                 break;
1329
1330         case LDAP_FILTER_AND:
1331         case LDAP_FILTER_OR:
1332                 cur++;
1333                 for (f=f->f_and; f; f=f->f_next) {
1334                         (void) oc_filter(f, cur, max);
1335                 }
1336                 break;
1337
1338         default:
1339                 break;
1340         }
1341         return rc;
1342 }
1343
1344 static void search_stack_free( void *key, void *data )
1345 {
1346         ber_memfree_x(data, NULL);
1347 }
1348
1349 static void *search_stack(
1350         Operation *op
1351 )
1352 {
1353         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1354         void *ret = NULL;
1355
1356         if ( op->o_threadctx ) {
1357                 ldap_pvt_thread_pool_getkey( op->o_threadctx, search_stack,
1358                         &ret, NULL );
1359         } else {
1360                 ret = bdb->bi_search_stack;
1361         }
1362
1363         if ( !ret ) {
1364                 ret = ch_malloc( bdb->bi_search_stack_depth * BDB_IDL_UM_SIZE
1365                         * sizeof( ID ) );
1366                 if ( op->o_threadctx ) {
1367                         ldap_pvt_thread_pool_setkey( op->o_threadctx, search_stack,
1368                                 ret, search_stack_free );
1369                 } else {
1370                         bdb->bi_search_stack = ret;
1371                 }
1372         }
1373         return ret;
1374 }
1375
1376 static int search_candidates(
1377         Operation *stackop,
1378         Operation *op,
1379         SlapReply *rs,
1380         Entry *e,
1381         u_int32_t locker,
1382         ID      *ids,
1383         ID      *scopes )
1384 {
1385         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
1386         int rc, depth = 1;
1387         Filter          f, rf, xf, nf;
1388         ID              *stack;
1389         AttributeAssertion aa_ref;
1390 #ifdef BDB_SUBENTRIES
1391         Filter  sf;
1392         AttributeAssertion aa_subentry;
1393 #endif
1394
1395         /*
1396          * This routine takes as input a filter (user-filter)
1397          * and rewrites it as follows:
1398          *      (&(scope=DN)[(objectClass=subentry)]
1399          *              (|[(objectClass=referral)(objectClass=alias)](user-filter))
1400          */
1401
1402 #ifdef NEW_LOGGING
1403         LDAP_LOG ( OPERATION, ENTRY,
1404                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1405                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope);
1406 #else
1407         Debug(LDAP_DEBUG_TRACE,
1408                 "search_candidates: base=\"%s\" (0x%08lx) scope=%d\n",
1409                 e->e_nname.bv_val, (long) e->e_id, op->oq_search.rs_scope );
1410 #endif
1411
1412         xf.f_or = op->oq_search.rs_filter;
1413         xf.f_choice = LDAP_FILTER_OR;
1414         xf.f_next = NULL;
1415
1416         /* If the user's filter uses objectClass=*,
1417          * these clauses are redundant.
1418          */
1419         if (!oc_filter(op->oq_search.rs_filter, 1, &depth)
1420                 && !get_subentries_visibility(op)
1421                 && !is_sync_protocol(op) )
1422         {
1423                 if( !get_manageDSAit(op) && !get_domainScope(op) ) {
1424                         /* match referral objects */
1425                         struct berval bv_ref = { sizeof("referral")-1, "referral" };
1426                         rf.f_choice = LDAP_FILTER_EQUALITY;
1427                         rf.f_ava = &aa_ref;
1428                         rf.f_av_desc = slap_schema.si_ad_objectClass;
1429                         rf.f_av_value = bv_ref;
1430                         rf.f_next = xf.f_or;
1431                         xf.f_or = &rf;
1432                         depth++;
1433                 }
1434         }
1435
1436         f.f_next = NULL;
1437         f.f_choice = LDAP_FILTER_AND;
1438         f.f_and = &nf;
1439         /* Dummy; we compute scope separately now */
1440         nf.f_choice = SLAPD_FILTER_COMPUTED;
1441         nf.f_result = LDAP_SUCCESS;
1442         nf.f_next = xf.f_or == op->oq_search.rs_filter
1443                 ? op->oq_search.rs_filter : &xf ;
1444         /* Filter depth increased again, adding dummy clause */
1445         depth++;
1446
1447 #ifdef BDB_SUBENTRIES
1448         if( get_subentries_visibility( op ) ) {
1449                 struct berval bv_subentry = { sizeof("SUBENTRY")-1, "SUBENTRY" };
1450                 sf.f_choice = LDAP_FILTER_EQUALITY;
1451                 sf.f_ava = &aa_subentry;
1452                 sf.f_av_desc = slap_schema.si_ad_objectClass;
1453                 sf.f_av_value = bv_subentry;
1454                 sf.f_next = nf.f_next;
1455                 nf.f_next = &sf;
1456         }
1457 #endif
1458
1459         /* Allocate IDL stack, plus 1 more for former tmp */
1460         if ( depth+1 > bdb->bi_search_stack_depth ) {
1461                 stack = ch_malloc( (depth + 1) * BDB_IDL_UM_SIZE * sizeof( ID ) );
1462         } else {
1463                 stack = search_stack( stackop );
1464         }
1465
1466         if( op->ors_deref & LDAP_DEREF_SEARCHING ) {
1467                 rc = search_aliases( op, rs, e, locker, ids, scopes, stack );
1468         } else {
1469                 rc = bdb_dn2idl( op, e, ids, stack );
1470         }
1471
1472         if ( rc == LDAP_SUCCESS ) {
1473                 rc = bdb_filter_candidates( op, &f, ids,
1474                         stack, stack+BDB_IDL_UM_SIZE );
1475         }
1476
1477         if ( depth+1 > bdb->bi_search_stack_depth ) {
1478                 ch_free( stack );
1479         }
1480
1481         if( rc ) {
1482 #ifdef NEW_LOGGING
1483                 LDAP_LOG ( OPERATION, DETAIL1,
1484                         "bdb_search_candidates: failed (rc=%d)\n", rc, 0, 0  );
1485 #else
1486                 Debug(LDAP_DEBUG_TRACE,
1487                         "bdb_search_candidates: failed (rc=%d)\n",
1488                         rc, NULL, NULL );
1489 #endif
1490
1491         } else {
1492 #ifdef NEW_LOGGING
1493                 LDAP_LOG ( OPERATION, DETAIL1,
1494                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1495                         (long) ids[0], (long) BDB_IDL_FIRST(ids),
1496                         (long) BDB_IDL_LAST(ids));
1497 #else
1498                 Debug(LDAP_DEBUG_TRACE,
1499                         "bdb_search_candidates: id=%ld first=%ld last=%ld\n",
1500                         (long) ids[0],
1501                         (long) BDB_IDL_FIRST(ids),
1502                         (long) BDB_IDL_LAST(ids) );
1503 #endif
1504         }
1505
1506         return rc;
1507 }
1508
1509 #ifdef LDAP_CONTROL_PAGEDRESULTS
1510 static void
1511 send_pagerequest_response(
1512         Operation       *op,
1513         SlapReply       *rs,
1514         ID              lastid,
1515         int             tentries )
1516 {
1517         LDAPControl     ctrl, *ctrls[2];
1518         BerElementBuffer berbuf;
1519         BerElement      *ber = (BerElement *)&berbuf;
1520         struct berval   cookie = { 0, NULL };
1521         PagedResultsCookie respcookie;
1522
1523 #ifdef NEW_LOGGING
1524         LDAP_LOG ( OPERATION, ENTRY,
1525                 "send_pagerequest_response: lastid: (0x%08lx) "
1526                 "nentries: (0x%081x)\n",
1527                 lastid, rs->sr_nentries, NULL );
1528 #else
1529         Debug(LDAP_DEBUG_ARGS, "send_pagerequest_response: lastid: (0x%08lx) "
1530                         "nentries: (0x%081x)\n", lastid, rs->sr_nentries, NULL );
1531 #endif
1532
1533         ctrl.ldctl_value.bv_val = NULL;
1534         ctrls[0] = &ctrl;
1535         ctrls[1] = NULL;
1536
1537         ber_init2( ber, NULL, LBER_USE_DER );
1538
1539         respcookie = ( PagedResultsCookie )lastid;
1540         op->o_conn->c_pagedresults_state.ps_cookie = respcookie;
1541         cookie.bv_len = sizeof( respcookie );
1542         cookie.bv_val = (char *)&respcookie;
1543
1544         /*
1545          * FIXME: we should consider sending an estimate of the entries
1546          * left, after appropriate security check is done
1547          */
1548         ber_printf( ber, "{iO}", tentries, &cookie );
1549
1550         if ( ber_flatten2( ber, &ctrls[0]->ldctl_value, 0 ) == -1 ) {
1551                 goto done;
1552         }
1553
1554         ctrls[0]->ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
1555         ctrls[0]->ldctl_iscritical = 0;
1556
1557         rs->sr_ctrls = ctrls;
1558         rs->sr_err = LDAP_SUCCESS;
1559         send_ldap_result( op, rs );
1560
1561 done:
1562         (void) ber_free_buf( ber );
1563 }
1564 #endif
1565
1566 int
1567 bdb_build_sync_state_ctrl(
1568         Operation       *op,
1569         SlapReply       *rs,
1570         Entry           *e,
1571         int                     entry_sync_state,
1572         LDAPControl     **ctrls,
1573         int                     num_ctrls,
1574         int                     send_cookie,
1575         struct berval   *csn)
1576 {
1577         Attribute* a;
1578         int ret;
1579         int res;
1580         const char *text = NULL;
1581
1582         BerElementBuffer berbuf;
1583         BerElement *ber = (BerElement *)&berbuf;
1584
1585         struct berval entryuuid_bv      = { 0, NULL };
1586
1587         ber_init2( ber, 0, LBER_USE_DER );
1588
1589         ctrls[num_ctrls] = ch_malloc ( sizeof ( LDAPControl ) );
1590
1591         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
1592                 AttributeDescription *desc = a->a_desc;
1593                 if ( desc == slap_schema.si_ad_entryUUID ) {
1594                         ber_dupbv( &entryuuid_bv, &a->a_vals[0] );
1595                 }
1596         }
1597
1598         if ( send_cookie && csn ) {
1599                 ber_printf( ber, "{eOON}",
1600                         entry_sync_state, &entryuuid_bv, csn );
1601         } else {
1602                 ber_printf( ber, "{eON}",
1603                         entry_sync_state, &entryuuid_bv );
1604         }
1605
1606         ch_free( entryuuid_bv.bv_val );
1607         entryuuid_bv.bv_val = NULL;
1608
1609         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
1610         ctrls[num_ctrls]->ldctl_iscritical = op->o_sync;
1611         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
1612
1613         ber_free_buf( ber );
1614
1615         if ( ret < 0 ) {
1616 #ifdef NEW_LOGGING
1617                 LDAP_LOG ( OPERATION, RESULTS,
1618                         "bdb_build_sync_ctrl: ber_flatten2 failed\n",
1619                         0, 0, 0 );
1620 #else
1621                 Debug( LDAP_DEBUG_TRACE,
1622                         "bdb_build_sync_ctrl: ber_flatten2 failed\n",
1623                         0, 0, 0 );
1624 #endif
1625                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
1626                 return ret;
1627         }
1628
1629         return LDAP_SUCCESS;
1630 }
1631
1632 int
1633 bdb_build_sync_done_ctrl(
1634         Operation       *op,
1635         SlapReply       *rs,
1636         LDAPControl     **ctrls,
1637         int             num_ctrls,
1638         int             send_cookie,
1639         struct berval   *csn )
1640 {
1641         int ret;
1642         BerElementBuffer berbuf;
1643         BerElement *ber = (BerElement *)&berbuf;
1644
1645         ber_init2( ber, NULL, LBER_USE_DER );
1646
1647         ctrls[num_ctrls] = ch_malloc ( sizeof ( LDAPControl ) );
1648
1649         if ( send_cookie && csn ) {
1650                 ber_printf( ber, "{ON}", csn );
1651         } else {
1652                 ber_printf( ber, "{N}" );
1653         }
1654
1655         ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_DONE;
1656         ctrls[num_ctrls]->ldctl_iscritical = op->o_sync;
1657         ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
1658
1659         ber_free_buf( ber );
1660
1661         if ( ret < 0 ) {
1662 #ifdef NEW_LOGGING
1663                 LDAP_LOG ( OPERATION, RESULTS,
1664                         "bdb_build_sync_done_ctrl: ber_flatten2 failed\n",
1665                         0, 0, 0 );
1666 #else
1667                 Debug( LDAP_DEBUG_TRACE,
1668                         "bdb_build_sync_done_ctrl: ber_flatten2 failed\n",
1669                         0, 0, 0 );
1670 #endif
1671                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
1672                 return ret;
1673         }
1674
1675         return LDAP_SUCCESS;
1676 }
1677
1678 int
1679 bdb_send_ldap_intermediate(
1680         Operation   *op,
1681         SlapReply   *rs,
1682         int         state,
1683         struct berval *cookie )
1684 {
1685         BerElementBuffer berbuf;
1686         BerElement *ber = (BerElement *)&berbuf;
1687         struct berval rspdata;
1688
1689         int ret;
1690
1691         ber_init2( ber, NULL, LBER_USE_DER );
1692
1693         if ( cookie == NULL ) {
1694                 ber_printf( ber, "{eN}", state );
1695         } else {
1696                 ber_printf( ber, "{eON}", state, cookie );
1697         }
1698
1699         ret = ber_flatten2( ber, &rspdata, 0 );
1700
1701         if ( ret < 0 ) {
1702 #ifdef NEW_LOGGING
1703                 LDAP_LOG ( OPERATION, RESULTS,
1704                         "bdb_send_ldap_intermediate: ber_flatten2 failed\n",
1705                         0, 0, 0 );
1706 #else
1707                 Debug( LDAP_DEBUG_TRACE,
1708                         "bdb_send_ldap_intermediate: ber_flatten2 failed\n",
1709                         0, 0, 0 );
1710 #endif
1711                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
1712                 return ret;
1713         }
1714
1715         rs->sr_rspdata = &rspdata;
1716         send_ldap_intermediate( op, rs );
1717         rs->sr_rspdata = NULL;
1718         ber_free_buf( ber );
1719
1720         return LDAP_SUCCESS;
1721 }