ITS#4088 force cursors to use same locker

[openldap] / servers / slapd / back-bdb / search.c

diff --git a/servers/slapd/back-bdb/search.c b/servers/slapd/back-bdb/search.c
index a7525be1d813774c8ad10c7c6ad86b5d199f3a04..3151d3d6aa3f9e8d4e7198d25532dc1b9f392658 100644 (file)
--- a/servers/slapd/back-bdb/search.c
+++ b/servers/slapd/back-bdb/search.c
@@ -64,12 +64,17 @@ static Entry * deref_base (
        rs->sr_err = LDAP_ALIAS_DEREF_PROBLEM;
        rs->sr_text = "maximum deref depth exceeded";
 
-       while (BDB_IDL_N(tmp) < op->o_bd->be_max_deref_depth) {
+       for (;;) {
                /* Remember the last entry we looked at, so we can
                 * report broken links
                 */
                *matched = e;
 
+               if (BDB_IDL_N(tmp) >= op->o_bd->be_max_deref_depth) {
+                       e = NULL;
+                       break;
+               }
+
                /* If this is part of a subtree or onelevel search,
                 * have we seen this ID before? If so, quit.
                 */
@@ -360,6 +365,9 @@ bdb_search( Operation *op, SlapReply *rs )
                ei = &ei_root;
                rs->sr_err = LDAP_SUCCESS;
        } else {
+               if ( op->ors_deref & LDAP_DEREF_FINDING ) {
+                       BDB_IDL_ZERO(candidates);
+               }
 dn2entry_retry:
                /* get entry with reader lock */
                rs->sr_err = bdb_dn2entry( op, ltid, &op->o_req_ndn, &ei,
@@ -388,10 +396,26 @@ dn2entry_retry:
                return rs->sr_err;
        }
 
-       if ( e && (op->ors_deref & LDAP_DEREF_FINDING) && is_entry_alias(e) ) {
-               BDB_IDL_ZERO(candidates);
-               e = deref_base( op, rs, e, &matched, locker, &lock,
-                       candidates, NULL );
+       if ( op->ors_deref & LDAP_DEREF_FINDING ) {
+               if ( matched && is_entry_alias( matched )) {
+                       struct berval stub;
+
+                       stub.bv_val = op->o_req_ndn.bv_val;
+                       stub.bv_len = op->o_req_ndn.bv_len - matched->e_nname.bv_len - 1;
+                       e = deref_base( op, rs, matched, &matched, locker, &lock,
+                               candidates, NULL );
+                       if ( e ) {
+                               build_new_dn( &op->o_req_ndn, &e->e_nname, &stub,
+                                       op->o_tmpmemctx );
+                               bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache,
+                                       e, &lock);
+                               matched = NULL;
+                               goto dn2entry_retry;
+                       }
+               } else if ( e && is_entry_alias( e )) {
+                       e = deref_base( op, rs, e, &matched, locker, &lock,
+                               candidates, NULL );
+               }
        }
 
        if ( e == NULL ) {
@@ -417,7 +441,8 @@ dn2entry_retry:
                                erefs = is_entry_referral( matched )
                                        ? get_entry_referrals( op, matched )
                                        : NULL;
-                               rs->sr_err = LDAP_REFERRAL;
+                               if ( rs->sr_err == DB_NOTFOUND )
+                                       rs->sr_err = LDAP_REFERRAL;
                                rs->sr_matched = matched_dn.bv_val;
                        }
 
@@ -477,7 +502,7 @@ dn2entry_retry:
                        bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
                }
                send_ldap_result( op, rs );
-               return 1;
+               return rs->sr_err;
        }
 #endif /* SLAP_ACL_HONOR_DISCLOSE */
 
@@ -850,6 +875,12 @@ fetch_entry_retry:
 
                        if ( get_pagedresults(op) > SLAP_CONTROL_IGNORED ) {
                                if ( rs->sr_nentries >= ((PagedResultsState *)op->o_pagedresults_state)->ps_size ) {
+#ifdef SLAP_ZONE_ALLOC
+                                       slap_zn_runlock(bdb->bi_cache.c_zctx, e);
+#endif
+                                       bdb_cache_return_entry_r( bdb->bi_dbenv,
+                                                       &bdb->bi_cache, e, &lock );
+                                       e = NULL;
                                        send_paged_response( op, rs, &lastid, tentries );
                                        goto done;
                                }