* CDDL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#ifndef _SYS_UBERBLOCK_IMPL_H
#endif
/*
- * For zdb use and debugging purposes only
- */
-extern uint64_t ub_max_txg;
-
-/*
* The uberblock version is incremented whenever an incompatible on-disk
* format change is made to the SPA, DMU, or ZAP.
*
uint64_t ub_guid_sum; /* sum of all vdev guids */
uint64_t ub_timestamp; /* UTC time of last sync */
blkptr_t ub_rootbp; /* MOS objset_phys_t */
+
+ /* highest SPA_VERSION supported by software that wrote this txg */
+ uint64_t ub_software_version;
};
#ifdef __cplusplus