]> git.sur5r.net Git - openldap/blobdiff - servers/slapd/back-ldbm/search.c
More unifdef SLAPD_MULTIMASTER cleanup
[openldap] / servers / slapd / back-ldbm / search.c
index a82ffe7f90ba8fa805985bee8c543d56a13b9e40..0f949ca5b00aa35d7d33dc4634259ad9a910ebd1 100644 (file)
@@ -1,8 +1,17 @@
 /* search.c - ldbm backend search function */
 /* $OpenLDAP$ */
-/*
- * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2006 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
  */
 
 #include "portable.h"
@@ -20,173 +29,180 @@ static ID_BLOCK   *base_candidate(
        Backend *be, Entry *e );
 
 static ID_BLOCK        *search_candidates(
-       Backend *be, Entry *e, Filter *filter,
+       Operation *op, Entry *e, Filter *filter,
        int scope, int deref, int manageDSAit );
 
 
 int
 ldbm_back_search(
-    Backend    *be,
-    Connection *conn,
     Operation  *op,
-    struct berval      *base,
-    struct berval      *nbase,
-    int                scope,
-    int                deref,
-    int                slimit,
-    int                tlimit,
-    Filter     *filter,
-    struct berval      *filterstr,
-    AttributeName      *attrs,
-    int                attrsonly )
+    SlapReply  *rs )
 {
-       struct ldbminfo *li = (struct ldbminfo *) be->be_private;
-       int             rc, err;
-       const char *text = NULL;
+       struct ldbminfo *li = (struct ldbminfo *) op->o_bd->be_private;
+       int             rc;
        time_t          stoptime;
        ID_BLOCK                *candidates;
        ID              id, cursor;
        Entry           *e;
-       BerVarray               v2refs = NULL;
        Entry   *matched = NULL;
-       struct berval   realbase = { 0, NULL };
-       int             nentries = 0;
+       struct berval   realbase = BER_BVNULL;
        int             manageDSAit = get_manageDSAit( op );
-       int             cscope = LDAP_SCOPE_DEFAULT;
+#ifdef SLAP_ACL_HONOR_DISCLOSE
+       slap_mask_t     mask;
+#endif
 
-       struct slap_limits_set *limit = NULL;
-       int isroot = 0;
-               
-#ifdef NEW_LOGGING
-       LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
-               "ldbm_back_search: enter\n" ));
-#else
        Debug(LDAP_DEBUG_TRACE, "=> ldbm_back_search\n", 0, 0, 0);
-#endif
 
        /* grab giant lock for reading */
        ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
 
-       if ( nbase->bv_len == 0 ) {
+       if ( op->o_req_ndn.bv_len == 0 ) {
                /* DIT root special case */
                e = (Entry *) &slap_entry_root;
 
                /* need normalized dn below */
                ber_dupbv( &realbase, &e->e_nname );
 
-               candidates = search_candidates( be, e, filter,
-                   scope, deref, manageDSAit );
+               candidates = search_candidates( op, e, op->ors_filter,
+                       op->ors_scope, op->ors_deref,
+                       manageDSAit || get_domainScope(op) );
 
                goto searchit;
                
-       } else if ( deref & LDAP_DEREF_FINDING ) {
+       } else if ( op->ors_deref & LDAP_DEREF_FINDING ) {
                /* deref dn and get entry with reader lock */
-               e = deref_dn_r( be, nbase, &err, &matched, &text );
+               e = deref_dn_r( op->o_bd, &op->o_req_ndn,
+                       &rs->sr_err, &matched, &rs->sr_text );
 
-               if( err == LDAP_NO_SUCH_OBJECT ) err = LDAP_REFERRAL;
+               if( rs->sr_err == LDAP_NO_SUCH_OBJECT ) rs->sr_err = LDAP_REFERRAL;
 
        } else {
                /* get entry with reader lock */
-               e = dn2entry_r( be, nbase, &matched );
-               err = e != NULL ? LDAP_SUCCESS : LDAP_REFERRAL;
-               text = NULL;
+               e = dn2entry_r( op->o_bd, &op->o_req_ndn, &matched );
+               rs->sr_err = e != NULL ? LDAP_SUCCESS : LDAP_REFERRAL;
+               rs->sr_text = NULL;
        }
 
        if ( e == NULL ) {
-               struct berval matched_dn = { 0, NULL };
-               BerVarray refs = NULL;
+               struct berval matched_dn = BER_BVNULL;
 
                if ( matched != NULL ) {
-                       BerVarray erefs;
-                       ber_dupbv( &matched_dn, &matched->e_name );
-
-                       erefs = is_entry_referral( matched )
-                               ? get_entry_referrals( be, conn, op, matched )
-                               : NULL;
+                       BerVarray erefs = NULL;
+
+#ifdef SLAP_ACL_HONOR_DISCLOSE
+                       if ( ! access_allowed( op, matched,
+                                               slap_schema.si_ad_entry,
+                                               NULL, ACL_DISCLOSE, NULL ) )
+                       {
+                               rs->sr_err = LDAP_NO_SUCH_OBJECT;
+
+                       } else
+#endif /* SLAP_ACL_HONOR_DISCLOSE */
+                       {
+                               ber_dupbv( &matched_dn, &matched->e_name );
+
+                               erefs = is_entry_referral( matched )
+                                       ? get_entry_referrals( op, matched )
+                                       : NULL;
+                       }
 
                        cache_return_entry_r( &li->li_cache, matched );
 
-                       if( erefs ) {
-                               refs = referral_rewrite( erefs, &matched_dn,
-                                       base, scope );
+                       if ( erefs ) {
+                               rs->sr_ref = referral_rewrite( erefs, &matched_dn,
+                                       &op->o_req_dn, op->ors_scope );
 
                                ber_bvarray_free( erefs );
                        }
 
                } else {
-                       refs = referral_rewrite( default_referral,
-                               NULL, base, scope );
+                       rs->sr_ref = referral_rewrite( default_referral,
+                               NULL, &op->o_req_dn, op->ors_scope );
                }
 
                ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 
-               send_ldap_result( conn, op, err, matched_dn.bv_val, 
-                       text, refs, NULL );
+               rs->sr_matched = matched_dn.bv_val;
+               send_ldap_result( op, rs );
 
-               ber_bvarray_free( refs );
+               ber_bvarray_free( rs->sr_ref );
                ber_memfree( matched_dn.bv_val );
-               return 1;
+               rs->sr_ref = NULL;
+               rs->sr_matched = NULL;
+               return rs->sr_err;
+       }
+
+#ifdef SLAP_ACL_HONOR_DISCLOSE
+       /* NOTE: __NEW__ "search" access is required
+        * on searchBase object */
+       if ( ! access_allowed_mask( op, e, slap_schema.si_ad_entry,
+                               NULL, ACL_SEARCH, NULL, &mask ) )
+       {
+               if ( !ACL_GRANT( mask, ACL_DISCLOSE ) ) {
+                       rs->sr_err = LDAP_NO_SUCH_OBJECT;
+               } else {
+                       rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
+               }
+
+               cache_return_entry_r( &li->li_cache, e );
+               ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
+
+               send_ldap_result( op, rs );
+               return rs->sr_err;
        }
+#endif /* SLAP_ACL_HONOR_DISCLOSE */
 
-       if (!manageDSAit && is_entry_referral( e ) ) {
+       if ( !manageDSAit && is_entry_referral( e ) ) {
                /* entry is a referral, don't allow add */
-               struct berval matched_dn;
-               BerVarray erefs;
-               BerVarray refs;
+               struct berval   matched_dn = BER_BVNULL;
+               BerVarray       erefs = NULL;
+
+               rs->sr_ref = NULL;
+               rs->sr_err = LDAP_OTHER;
+               rs->sr_text = "bad referral object";
 
                ber_dupbv( &matched_dn, &e->e_name );
-               erefs = get_entry_referrals( be, conn, op, e );
-               refs = NULL;
+               erefs = get_entry_referrals( op, e );
 
                cache_return_entry_r( &li->li_cache, e );
                ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 
-#ifdef NEW_LOGGING
-               LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
-                       "ldbm_search: entry (%s) is a referral.\n",
-                       e->e_dn ));
-#else
                Debug( LDAP_DEBUG_TRACE,
                        "ldbm_search: entry is referral\n",
                        0, 0, 0 );
-#endif
 
-               if( erefs ) {
-                       refs = referral_rewrite( erefs, &matched_dn,
-                               base, scope );
+               if ( erefs ) {
+                       rs->sr_ref = referral_rewrite( erefs, &matched_dn,
+                               &op->o_req_dn, op->ors_scope );
 
                        ber_bvarray_free( erefs );
+                       
+                       if ( rs->sr_ref ) {
+                               rs->sr_err = LDAP_REFERRAL;
+                               rs->sr_text = NULL;
+                       }
                }
 
-               if( refs ) {
-                       send_ldap_result( conn, op, LDAP_REFERRAL,
-                               matched_dn.bv_val, NULL, refs, NULL );
-                       ber_bvarray_free( refs );
-
-               } else {
-                       send_ldap_result( conn, op, LDAP_OTHER,
-                               matched_dn.bv_val,
-                       "bad referral object", NULL, NULL );
-               }
-
+               rs->sr_matched = matched_dn.bv_val;
+               send_ldap_result( op, rs );
+               ber_bvarray_free( rs->sr_ref );
                ber_memfree( matched_dn.bv_val );
-               return 1;
+               rs->sr_ref = NULL;
+               rs->sr_matched = NULL;
+               return rs->sr_err;
        }
 
        if ( is_entry_alias( e ) ) {
                /* don't deref */
-               deref = LDAP_DEREF_NEVER;
+               op->ors_deref = LDAP_DEREF_NEVER;
        }
 
-       if ( scope == LDAP_SCOPE_BASE ) {
-               cscope = LDAP_SCOPE_BASE;
-               candidates = base_candidate( be, e );
+       if ( op->ors_scope == LDAP_SCOPE_BASE ) {
+               candidates = base_candidate( op->o_bd, e );
 
        } else {
-               cscope = ( scope != LDAP_SCOPE_SUBTREE )
-                       ? LDAP_SCOPE_BASE : LDAP_SCOPE_SUBTREE;
-               candidates = search_candidates( be, e, filter,
-                   scope, deref, manageDSAit );
+               candidates = search_candidates( op, e, op->ors_filter,
+                   op->ors_scope, op->ors_deref, manageDSAit );
        }
 
        /* need normalized dn below */
@@ -197,139 +213,90 @@ ldbm_back_search(
 searchit:
        if ( candidates == NULL ) {
                /* no candidates */
-#ifdef NEW_LOGGING
-               LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
-                       "ldbm_search: no candidates\n" ));
-#else
                Debug( LDAP_DEBUG_TRACE, "ldbm_search: no candidates\n",
                        0, 0, 0 );
-#endif
 
-               send_search_result( conn, op,
-                       LDAP_SUCCESS,
-                       NULL, NULL, NULL, NULL, 0 );
+               rs->sr_err = LDAP_SUCCESS;
+               send_ldap_result( op, rs );
 
-               rc = 1;
+               rc = LDAP_SUCCESS;
                goto done;
        }
 
-       /* if not root, get appropriate limits */
-       if ( be_isroot( be, &op->o_ndn ) ) {
-               isroot = 1;
-       } else {
-               ( void ) get_limits( be, &op->o_ndn, &limit );
-       }
-
        /* if candidates exceed to-be-checked entries, abort */
-       if ( !isroot && limit->lms_s_unchecked != -1 ) {
-               if ( ID_BLOCK_NIDS( candidates ) > (unsigned) limit->lms_s_unchecked ) {
-                       send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
-                                       NULL, NULL, NULL, NULL, 0 );
-                       rc = 0;
-                       goto done;
-               }
+       if ( op->ors_limit      /* isroot == FALSE */
+                       && op->ors_limit->lms_s_unchecked != -1
+                       && ID_BLOCK_NIDS( candidates ) > (unsigned) op->ors_limit->lms_s_unchecked )
+       {
+               send_ldap_error( op, rs, LDAP_ADMINLIMIT_EXCEEDED, NULL );
+               rc = LDAP_SUCCESS;
+               goto done;
        }
        
-       /* if root an no specific limit is required, allow unlimited search */
-       if ( isroot ) {
-               if ( tlimit == 0 ) {
-                       tlimit = -1;
-               }
-
-               if ( slimit == 0 ) {
-                       slimit = -1;
-               }
-
-       } else {
-               /* if no limit is required, use soft limit */
-               if ( tlimit <= 0 ) {
-                       tlimit = limit->lms_t_soft;
-               
-               /* if requested limit higher than hard limit, abort */
-               } else if ( tlimit > limit->lms_t_hard ) {
-                       /* no hard limit means use soft instead */
-                       if ( limit->lms_t_hard == 0 ) {
-                               tlimit = limit->lms_t_soft;
-                       
-                       /* positive hard limit means abort */
-                       } else if ( limit->lms_t_hard > 0 ) {
-                               send_search_result( conn, op, 
-                                               LDAP_UNWILLING_TO_PERFORM,
-                                               NULL, NULL, NULL, NULL, 0 );
-                               rc = 0; 
-                               goto done;
-                       }
-
-                       /* negative hard limit means no limit */
-               }
-
-               /* if no limit is required, use soft limit */
-               if ( slimit <= 0 ) {
-                       slimit = limit->lms_s_soft;
-
-               /* if requested limit higher than hard limit, abort */
-               } else if ( slimit > limit->lms_s_hard ) {
-                       /* no hard limit means use soft instead */
-                       if ( limit->lms_s_hard == 0 ) {
-                               slimit = limit->lms_s_soft;
-
-                       /* positive hard limit means abort */
-                       } else if ( limit->lms_s_hard > 0 ) {
-                               send_search_result( conn, op,
-                                               LDAP_UNWILLING_TO_PERFORM,
-                                               NULL, NULL, NULL, NULL, 0 );
-                               rc = 0;
-                               goto done;
-                       }
-
-                       /* negative hard limit means no limit */
-               }
-       }
-
        /* compute it anyway; root does not use it */
-       stoptime = op->o_time + tlimit;
+       stoptime = op->o_time + op->ors_tlimit;
+       rs->sr_attrs = op->ors_attrs;
 
        for ( id = idl_firstid( candidates, &cursor ); id != NOID;
            id = idl_nextid( candidates, &cursor ) )
        {
                int scopeok = 0;
+               int result = 0;
 
                /* check for abandon */
                if ( op->o_abandon ) {
-                       rc = 0;
+                       rc = SLAPD_ABANDON;
                        goto done;
                }
 
                /* check time limit */
-               if ( tlimit != -1 && slap_get_time() > stoptime ) {
-                       send_search_result( conn, op, LDAP_TIMELIMIT_EXCEEDED,
-                               NULL, NULL, v2refs, NULL, nentries );
-                       rc = 0;
+               if ( op->ors_tlimit != SLAP_NO_LIMIT
+                               && slap_get_time() > stoptime )
+               {
+                       rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
+                       send_ldap_result( op, rs );
+                       rc = LDAP_SUCCESS;
                        goto done;
                }
 
                /* get the entry with reader lock */
-               e = id2entry_r( be, id );
+               e = id2entry_r( op->o_bd, id );
 
                if ( e == NULL ) {
-#ifdef NEW_LOGGING
-                       LDAP_LOG(( "backend", LDAP_LEVEL_INFO,
-                               "ldbm_search: candidate %ld not found.\n", id ));
-#else
                        Debug( LDAP_DEBUG_TRACE,
                                "ldbm_search: candidate %ld not found\n",
                                id, 0, 0 );
-#endif
 
                        goto loop_continue;
                }
 
-               if ( deref & LDAP_DEREF_SEARCHING && is_entry_alias( e ) ) {
+               rs->sr_entry = e;
+
+               if ( is_entry_subentry( e ) ) {
+                       if( op->ors_scope != LDAP_SCOPE_BASE ) {
+                               if(!get_subentries_visibility( op )) {
+                                       /* only subentries are visible */
+                                       goto loop_continue;
+                               }
+                       } else if ( get_subentries( op ) &&
+                               !get_subentries_visibility( op ))
+                       {
+                               /* only subentries are visible */
+                               goto loop_continue;
+                       }
+               } else if ( get_subentries_visibility( op )) {
+                       /* only subentries are visible */
+                       goto loop_continue;
+               }
+
+               if ( op->ors_deref & LDAP_DEREF_SEARCHING &&
+                       is_entry_alias( e ) )
+               {
                        Entry *matched;
                        int err;
                        const char *text;
                        
-                       e = deref_entry_r( be, e, &err, &matched, &text );
+                       e = deref_entry_r( op->o_bd, e, &err, &matched, &text );
 
                        if( e == NULL ) {
                                e = matched;
@@ -342,7 +309,7 @@ searchit:
                        }
 
                        /* need to skip alias which deref into scope */
-                       if( scope & LDAP_SCOPE_ONELEVEL ) {
+                       if( op->ors_scope == LDAP_SCOPE_ONELEVEL ) {
                                struct berval pdn;
                                dnParent( &e->e_nname, &pdn );
                                if ( ber_bvcmp( &pdn, &realbase ) ) {
@@ -351,143 +318,143 @@ searchit:
 
                        } else if ( dnIsSuffix( &e->e_nname, &realbase ) ) {
                                /* alias is within scope */
-#ifdef NEW_LOGGING
-                               LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
-                                       "ldbm_search: alias \"%s\" in subtree\n", e->e_dn ));
-#else
                                Debug( LDAP_DEBUG_TRACE,
                                        "ldbm_search: alias \"%s\" in subtree\n",
                                        e->e_dn, 0, 0 );
-#endif
 
                                goto loop_continue;
                        }
 
+                       rs->sr_entry = e;
+
                        scopeok = 1;
                }
 
                /*
-                * if it's a referral, add it to the list of referrals. only do
-                * this for non-base searches, and don't check the filter
-                * explicitly here since it's only a candidate anyway.
+                * If it's a referral, add it to the list of referrals.
+                * Only do this for non-base searches, and don't check
+                * the filter explicitly here since it's only a candidate
+                * anyway.
                 */
-               if ( !manageDSAit && scope != LDAP_SCOPE_BASE &&
+               if ( !manageDSAit && op->ors_scope != LDAP_SCOPE_BASE &&
                        is_entry_referral( e ) )
                {
                        struct berval   dn;
 
                        /* check scope */
-                       if ( !scopeok && scope == LDAP_SCOPE_ONELEVEL ) {
-                               if ( !be_issuffix( be, &e->e_nname ) ) {
+                       if ( !scopeok && op->ors_scope == LDAP_SCOPE_ONELEVEL ) {
+                               if ( !be_issuffix( op->o_bd, &e->e_nname ) ) {
                                        dnParent( &e->e_nname, &dn );
                                        scopeok = dn_match( &dn, &realbase );
                                } else {
                                        scopeok = (realbase.bv_len == 0);
                                }
 
-                       } else if ( !scopeok && scope == LDAP_SCOPE_SUBTREE ) {
+                       } else if ( !scopeok
+                               && op->ors_scope == LDAP_SCOPE_SUBTREE )
+                       {
                                scopeok = dnIsSuffix( &e->e_nname, &realbase );
 
+#ifdef LDAP_SCOPE_SUBORDINATE
+                       } else if ( !scopeok
+                               && op->ors_scope == LDAP_SCOPE_SUBORDINATE )
+                       {
+                               scopeok = !dn_match( &e->e_nname, &realbase )
+                                       && dnIsSuffix( &e->e_nname, &realbase );
+#endif
+
                        } else {
                                scopeok = 1;
                        }
 
                        if( scopeok ) {
-                               BerVarray erefs = get_entry_referrals(
-                                       be, conn, op, e );
-                               BerVarray refs = referral_rewrite( erefs,
+                               BerVarray erefs = get_entry_referrals( op, e );
+                               rs->sr_ref = referral_rewrite( erefs,
                                        &e->e_name, NULL,
-                                       scope == LDAP_SCOPE_SUBTREE
-                                               ? LDAP_SCOPE_SUBTREE
-                                               : LDAP_SCOPE_BASE );
+                                       op->ors_scope == LDAP_SCOPE_ONELEVEL
+                                               ? LDAP_SCOPE_BASE
+                                               : LDAP_SCOPE_SUBTREE );
+
+                               ber_bvarray_free( erefs );
 
-                               send_search_reference( be, conn, op,
-                                       e, refs, NULL, &v2refs );
+                               send_search_reference( op, rs );
 
-                               ber_bvarray_free( refs );
+                               ber_bvarray_free( rs->sr_ref );
+                               rs->sr_ref = NULL;
 
                        } else {
-#ifdef NEW_LOGGING
-                               LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL2,
-                                       "ldbm_search: candidate referral %ld scope not okay\n",
-                                       id ));
-#else
                                Debug( LDAP_DEBUG_TRACE,
                                        "ldbm_search: candidate referral %ld scope not okay\n",
                                        id, 0, 0 );
-#endif
                        }
 
                        goto loop_continue;
                }
 
+               if ( !manageDSAit && is_entry_glue( e )) {
+                       goto loop_continue;
+               }
+
                /* if it matches the filter and scope, send it */
-               if ( test_filter( be, conn, op, e, filter ) == LDAP_COMPARE_TRUE ) {
+               result = test_filter( op, e, op->ors_filter );
+
+               if ( result == LDAP_COMPARE_TRUE ) {
                        struct berval   dn;
 
                        /* check scope */
-                       if ( !scopeok && scope == LDAP_SCOPE_ONELEVEL ) {
-                               if ( !be_issuffix( be, &e->e_nname ) ) {
+                       if ( !scopeok && op->ors_scope == LDAP_SCOPE_ONELEVEL ) {
+                               if ( !be_issuffix( op->o_bd, &e->e_nname ) ) {
                                        dnParent( &e->e_nname, &dn );
                                        scopeok = dn_match( &dn, &realbase );
                                } else {
                                        scopeok = (realbase.bv_len == 0);
                                }
 
-                       } else if ( !scopeok && scope == LDAP_SCOPE_SUBTREE ) {
+                       } else if ( !scopeok &&
+                               op->ors_scope == LDAP_SCOPE_SUBTREE )
+                       {
                                scopeok = dnIsSuffix( &e->e_nname, &realbase );
 
+                       } else if ( !scopeok &&
+                               op->ors_scope == LDAP_SCOPE_SUBORDINATE )
+                       {
+                               scopeok = !dn_match( &e->e_nname, &realbase )
+                                       && dnIsSuffix( &e->e_nname, &realbase );
+
                        } else {
                                scopeok = 1;
                        }
 
                        if ( scopeok ) {
-                               /* check size limit */
-                               if ( --slimit == -1 ) {
-                                       cache_return_entry_r( &li->li_cache, e );
-                                       send_search_result( conn, op,
-                                               LDAP_SIZELIMIT_EXCEEDED, NULL, NULL,
-                                               v2refs, NULL, nentries );
-                                       rc = 0;
-                                       goto done;
-                               }
-
                                if (e) {
-                                       int result = send_search_entry(be, conn, op,
-                                               e, attrs, attrsonly, NULL);
-
-                                       switch (result) {
-                                       case 0:         /* entry sent ok */
-                                               nentries++;
-                                               break;
-                                       case 1:         /* entry not sent */
-                                               break;
-                                       case -1:        /* connection closed */
+                                       rs->sr_flags = 0;
+                                       rs->sr_err = send_search_entry( op, rs );
+
+                                       switch ( rs->sr_err ) {
+                                       case LDAP_UNAVAILABLE:  /* connection closed */
                                                cache_return_entry_r( &li->li_cache, e );
-                                               rc = 0;
+                                               rc = LDAP_SUCCESS;
+                                               goto done;
+                                       case LDAP_SIZELIMIT_EXCEEDED:
+                                               cache_return_entry_r( &li->li_cache, e );
+                                               rc = rs->sr_err;
+                                               rs->sr_entry = NULL;
+                                               send_ldap_result( op, rs );
+                                               rc = LDAP_SUCCESS;
                                                goto done;
                                        }
                                }
+
                        } else {
-#ifdef NEW_LOGGING
-                               LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL2,
-                                       "ldbm_search: candidate entry %ld scope not okay\n", id ));
-#else
                                Debug( LDAP_DEBUG_TRACE,
                                        "ldbm_search: candidate entry %ld scope not okay\n",
                                        id, 0, 0 );
-#endif
                        }
 
                } else {
-#ifdef NEW_LOGGING
-                       LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL2,
-                               "ldbm_search: candidate entry %ld does not match filter\n", id ));
-#else
                        Debug( LDAP_DEBUG_TRACE,
                                "ldbm_search: candidate entry %ld does not match filter\n",
                                id, 0, 0 );
-#endif
                }
 
 loop_continue:
@@ -499,11 +466,11 @@ loop_continue:
                ldap_pvt_thread_yield();
        }
 
-       send_search_result( conn, op,
-               v2refs == NULL ? LDAP_SUCCESS : LDAP_REFERRAL,
-               NULL, NULL, v2refs, NULL, nentries );
+       rs->sr_err = rs->sr_v2ref ? LDAP_REFERRAL : LDAP_SUCCESS;
+       rs->sr_ref = rs->sr_v2ref;
+       send_ldap_result( op, rs );
 
-       rc = 0;
+       rc = LDAP_SUCCESS;
 
 done:
        ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
@@ -511,7 +478,7 @@ done:
        if( candidates != NULL )
                idl_free( candidates );
 
-       if( v2refs ) ber_bvarray_free( v2refs );
+       if( rs->sr_v2ref ) ber_bvarray_free( rs->sr_v2ref );
        if( realbase.bv_val ) free( realbase.bv_val );
 
        return rc;
@@ -524,13 +491,8 @@ base_candidate(
 {
        ID_BLOCK                *idl;
 
-#ifdef NEW_LOGGING
-       LDAP_LOG(( "backend", LDAP_LEVEL_ENTRY,
-                  "base_candidate: base (%s)\n", e->e_dn ));
-#else
        Debug(LDAP_DEBUG_TRACE, "base_candidates: base: \"%s\"\n",
                e->e_dn, 0, 0);
-#endif
 
 
        idl = idl_alloc( 1 );
@@ -541,7 +503,7 @@ base_candidate(
 
 static ID_BLOCK *
 search_candidates(
-    Backend    *be,
+    Operation  *op,
     Entry      *e,
     Filter     *filter,
     int                scope,
@@ -551,18 +513,14 @@ search_candidates(
        ID_BLOCK                *candidates;
        Filter          f, fand, rf, af, xf;
     AttributeAssertion aa_ref, aa_alias;
-       struct berval bv_ref = { sizeof("REFERRAL")-1, "REFERRAL" };
-       struct berval bv_alias = { sizeof("ALIAS")-1, "ALIAS" };
-
-#ifdef NEW_LOGGING
-       LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
-                  "search_candidates: base (%s) scope %d deref %d\n",
-                  e->e_ndn, scope, deref ));
-#else
+       struct berval bv_ref = { sizeof("referral")-1, "referral" };
+       struct berval bv_alias = { sizeof("alias")-1, "alias" };
+       Filter  sf;
+       AttributeAssertion aa_subentry;
+
        Debug(LDAP_DEBUG_TRACE,
                "search_candidates: base=\"%s\" s=%d d=%d\n",
                e->e_ndn, scope, deref );
-#endif
 
 
        xf.f_or = filter;
@@ -592,13 +550,22 @@ search_candidates(
        f.f_next = NULL;
        f.f_choice = LDAP_FILTER_AND;
        f.f_and = &fand;
-       fand.f_choice = scope == LDAP_SCOPE_SUBTREE
-               ? SLAPD_FILTER_DN_SUBTREE
-               : SLAPD_FILTER_DN_ONE;
+       fand.f_choice = scope == LDAP_SCOPE_ONELEVEL
+               ? SLAPD_FILTER_DN_ONE
+               : SLAPD_FILTER_DN_SUBTREE;
        fand.f_dn = &e->e_nname;
        fand.f_next = xf.f_or == filter ? filter : &xf ;
 
-       candidates = filter_candidates( be, &f );
+       if ( get_subentries_visibility( op )) {
+               struct berval bv_subentry = { sizeof("SUBENTRY")-1, "SUBENTRY" };
+               sf.f_choice = LDAP_FILTER_EQUALITY;
+               sf.f_ava = &aa_subentry;
+               sf.f_av_desc = slap_schema.si_ad_objectClass;
+               sf.f_av_value = bv_subentry;
+               sf.f_next = fand.f_next;
+               fand.f_next = &sf;
+       }
 
+       candidates = filter_candidates( op, &f );
        return( candidates );
 }