/* operational.c - bdb backend operational attributes function */
-/*
- * Copyright 1998-2002 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 2000-2013 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"
#include "slap.h"
#include "back-bdb.h"
-#include "proto-bdb.h"
/*
- * sets the supported operational attributes (if required)
+ * sets *hasSubordinates to LDAP_COMPARE_TRUE/LDAP_COMPARE_FALSE
+ * if the entry has children or not.
*/
-
int
-bdb_operational(
- BackendDB *be,
- Connection *conn,
+bdb_hasSubordinates(
Operation *op,
Entry *e,
- AttributeName *attrs,
- int opattrs,
- Attribute **a )
+ int *hasSubordinates )
{
- struct bdb_info *bdb = (struct bdb_info *) be->be_private;
- Attribute **aa = a;
+ struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
+ struct bdb_op_info *opinfo;
+ OpExtra *oex;
+ DB_TXN *rtxn;
int rc;
- DB_TXN *ltid = NULL;
- struct bdb_op_info opinfo;
+ int release = 0;
- assert( e );
-
- if ( !opattrs && !ad_inlist( slap_schema.si_ad_hasSubordinates, attrs ) ) {
- return 0;
- }
-
-
- if( 0 ) {
-retry: /* transaction retry */
-#if 0
- if( e != NULL ) {
- bdb_unlocked_cache_return_entry_w(&bdb->bi_cache, 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 ) {
+ Entry *ee = NULL;
+ rc = be_entry_get_rw( op, &e->e_nname, NULL, NULL, 0, &ee );
+ if ( rc != LDAP_SUCCESS || ee == NULL ) {
+ rc = LDAP_OTHER;
+ goto done;
}
-#endif
-#ifdef NEW_LOGGING
- LDAP_LOG (( "operational", LDAP_LEVEL_DETAIL1,
- "=> bdb_operational: retrying...\n" ));
-#else
- Debug( LDAP_DEBUG_TRACE, "==> bdb_operational: retrying...\n",
- 0, 0, 0 );
-#endif
- rc = TXN_ABORT( ltid );
- ltid = NULL;
- op->o_private = NULL;
- if( rc != 0 ) {
+ e = ee;
+ release = 1;
+ if ( BEI( ee ) == NULL ) {
rc = LDAP_OTHER;
- goto return_results;
+ goto done;
}
- ldap_pvt_thread_yield();
}
- /* begin transaction */
- rc = TXN_BEGIN( bdb->bi_dbenv, NULL, <id, bdb->bi_db_opflags );
- if ( rc != 0 ) {
-#ifdef NEW_LOGGING
- LDAP_LOG (( "operational", LDAP_LEVEL_ERR,
- "=> bdb_operational: txn_begin failed: %s (%d)\n",
- db_strerror(rc), rc ));
-#else
- Debug( LDAP_DEBUG_TRACE,
- "bdb_operational: txn_begin failed: %s (%d)\n",
- db_strerror( rc ), rc, 0 );
-#endif
- rc = LDAP_OTHER;
- return rc;
+ /* 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 ) {
+ rc = LDAP_OTHER;
+ goto done;
+ }
}
- opinfo.boi_bdb = be;
- opinfo.boi_txn = ltid;
- opinfo.boi_err = 0;
- op->o_private = &opinfo;
+retry:
+ /* 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 );
- rc = bdb_dn2id_children( be, ltid, &e->e_nname );
-
switch( rc ) {
case DB_LOCK_DEADLOCK:
case DB_LOCK_NOTGRANTED:
goto retry;
case 0:
+ *hasSubordinates = LDAP_COMPARE_TRUE;
+ break;
+
case DB_NOTFOUND:
- *aa = slap_operational_hasSubordinate( rc == 0 );
- if ( *aa != NULL ) {
- aa = &(*aa)->a_next;
- }
+ *hasSubordinates = LDAP_COMPARE_FALSE;
+ rc = LDAP_SUCCESS;
break;
default:
-#ifdef NEW_LOGGING
- LDAP_LOG (( "operational", LDAP_LEVEL_ERR,
- "=> bdb_operational: has_children failed: %s (%d)\n",
- db_strerror(rc), rc ));
-#else
Debug(LDAP_DEBUG_ARGS,
- "<=- bdb_operational: 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;
}
-return_results:
- if ( rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
- ldap_pvt_thread_yield();
- TXN_CHECKPOINT( bdb->bi_dbenv,
- bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
+done:;
+ if ( release && e != NULL ) be_entry_release_r( op, e );
+ return rc;
+}
+
+/*
+ * sets the supported operational attributes (if required)
+ */
+int
+bdb_operational(
+ Operation *op,
+ SlapReply *rs )
+{
+ Attribute **ap;
+
+ assert( rs->sr_entry != NULL );
+
+ for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next ) {
+ if ( (*ap)->a_desc == slap_schema.si_ad_hasSubordinates ) {
+ break;
+ }
}
- if ( ltid != NULL ) {
- TXN_ABORT( ltid );
- op->o_private = NULL;
+ if ( *ap == NULL &&
+ attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_hasSubordinates ) == NULL &&
+ ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
+ ad_inlist( slap_schema.si_ad_hasSubordinates, rs->sr_attrs ) ) )
+ {
+ int hasSubordinates, rc;
+
+ rc = bdb_hasSubordinates( op, rs->sr_entry, &hasSubordinates );
+ if ( rc == LDAP_SUCCESS ) {
+ *ap = slap_operational_hasSubordinate( hasSubordinates == LDAP_COMPARE_TRUE );
+ assert( *ap != NULL );
+
+ ap = &(*ap)->a_next;
+ }
}
- return rc;
+ return LDAP_SUCCESS;
}
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