happy belated new year

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

diff --git a/servers/slapd/back-bdb/operational.c b/servers/slapd/back-bdb/operational.c
index 53f7acf23e3c3dc8aa5d72904d8c46c7d310282e..33b8f93784c173386cda01572cf0f4e9080dfef9 100644 (file)
--- a/servers/slapd/back-bdb/operational.c
+++ b/servers/slapd/back-bdb/operational.c
@@ -1,7 +1,17 @@
 /* operational.c - bdb backend operational attributes function */
-/*
- * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2010 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"
@@ -13,8 +23,6 @@
 
 #include "slap.h"
 #include "back-bdb.h"
-#include "proto-bdb.h"
-#include "external.h"
 
 /*
  * sets *hasSubordinates to LDAP_COMPARE_TRUE/LDAP_COMPARE_FALSE
@@ -26,17 +34,45 @@ bdb_hasSubordinates(
        Entry           *e,
        int             *hasSubordinates )
 {
+       struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
+       struct bdb_op_info      *opinfo;
+       OpExtra *oex;
+       DB_TXN          *rtxn;
        int             rc;
        
-       assert( e );
+       assert( e != NULL );
+
+       /* NOTE: this should never happen, but it actually happens
+        * when using back-relay; until we find a better way to
+        * preserve entry's private information while rewriting it,
+        * let's disable the hasSubordinate feature for back-relay.
+        */
+       if ( BEI( e ) == NULL ) {
+               return LDAP_OTHER;
+       }
+
+       /* Check for a txn in a parent op, otherwise use reader txn */
+       LDAP_SLIST_FOREACH( oex, &op->o_extra, oe_next ) {
+               if ( oex->oe_key == bdb )
+                       break;
+       }
+       opinfo = (struct bdb_op_info *) oex;
+       if ( opinfo && opinfo->boi_txn ) {
+               rtxn = opinfo->boi_txn;
+       } else {
+               rc = bdb_reader_get(op, bdb->bi_dbenv, &rtxn);
+               if ( rc ) return LDAP_OTHER;
+       }
 
 retry:
-       rc = bdb_dn2id_children( op->o_bd, NULL, &e->e_nname, 0 );
-       
+       /* FIXME: we can no longer assume the entry's e_private
+        * field is correctly populated; so we need to reacquire
+        * it with reader lock */
+       rc = bdb_cache_children( op, rtxn, e );
+
        switch( rc ) {
        case DB_LOCK_DEADLOCK:
        case DB_LOCK_NOTGRANTED:
-               ldap_pvt_thread_yield();
                goto retry;
 
        case 0:
@@ -49,15 +85,10 @@ retry:
                break;
 
        default:
-#ifdef NEW_LOGGING
-               LDAP_LOG ( OPERATION, ERR, 
-                       "=> bdb_hasSubordinates: has_children failed: %s (%d)\n",
-                       db_strerror(rc), rc, 0 );
-#else
                Debug(LDAP_DEBUG_ARGS, 
-                       "<=- bdb_hasSubordinates: has_children failed: %s (%d)\n", 
+                       "<=- " LDAP_XSTRING(bdb_hasSubordinates)
+                       ": has_children failed: %s (%d)\n", 
                        db_strerror(rc), rc, 0 );
-#endif
                rc = LDAP_OTHER;
        }
 
@@ -70,26 +101,29 @@ retry:
 int
 bdb_operational(
        Operation       *op,
-       SlapReply       *rs,
-       int             opattrs,
-       Attribute       **a )
+       SlapReply       *rs )
 {
-       Attribute       **aa = a;
-       
-       assert( rs->sr_entry );
+       Attribute       **ap;
+
+       assert( rs->sr_entry != NULL );
+
+       for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
+               /* just count */ ;
+
+       if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
+                       ad_inlist( slap_schema.si_ad_hasSubordinates, rs->sr_attrs ) )
+       {
+               int     hasSubordinates, rc;
 
-       if ( opattrs || ad_inlist( slap_schema.si_ad_hasSubordinates, rs->sr_attrs ) ) {
-               int     hasSubordinates;
+               rc = bdb_hasSubordinates( op, rs->sr_entry, &hasSubordinates );
+               if ( rc == LDAP_SUCCESS ) {
+                       *ap = slap_operational_hasSubordinate( hasSubordinates == LDAP_COMPARE_TRUE );
+                       assert( *ap != NULL );
 
-               rs->sr_err = bdb_hasSubordinates( op, rs->sr_entry, &hasSubordinates );
-               if ( rs->sr_err == LDAP_SUCCESS ) {
-                       *aa = slap_operational_hasSubordinate( hasSubordinates == LDAP_COMPARE_TRUE );
-                       if ( *aa != NULL ) {
-                               aa = &(*aa)->a_next;
-                       }
+                       ap = &(*ap)->a_next;
                }
        }
 
-       return rs->sr_err;
+       return LDAP_SUCCESS;
 }