mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-29 12:29:35 +03:00
829f9251cf
The zpool checkpoint feature in DxOS added a new field in the uberblock. The Multi-Modifier Protection Pull Request from ZoL adds three new fields in the uberblock (Reference: https://github.com/zfsonlinux/zfs/pull/6279). As these two changes come from two different sources and once upstreamed and deployed will introduce an incompatibility with each other we want to upstream a change that will reserve the padding for both of them so integration goes smoothly and everyone gets both features. Porting Notes: Preserved MMP comments in uberblock struct. Authored by: Serapheim Dimitropoulos <serapheim@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed by: Olaf Faaland <faaland1@llnl.gov> Approved by: Gordon Ross <gwr@nexenta.com> Ported-by: Giuseppe Di Natale <dinatale2@llnl.gov> OpenZFS-issue: https://www.illumos.org/issues/8491 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d84fa5f Closes #6390
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
* Copyright (c) 2017 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _SYS_UBERBLOCK_IMPL_H
|
|
#define _SYS_UBERBLOCK_IMPL_H
|
|
|
|
#include <sys/uberblock.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* The uberblock version is incremented whenever an incompatible on-disk
|
|
* format change is made to the SPA, DMU, or ZAP.
|
|
*
|
|
* Note: the first two fields should never be moved. When a storage pool
|
|
* is opened, the uberblock must be read off the disk before the version
|
|
* can be checked. If the ub_version field is moved, we may not detect
|
|
* version mismatch. If the ub_magic field is moved, applications that
|
|
* expect the magic number in the first word won't work.
|
|
*/
|
|
#define UBERBLOCK_MAGIC 0x00bab10c /* oo-ba-bloc! */
|
|
#define UBERBLOCK_SHIFT 10 /* up to 1K */
|
|
#define MMP_MAGIC 0xa11cea11 /* all-see-all */
|
|
|
|
struct uberblock {
|
|
uint64_t ub_magic; /* UBERBLOCK_MAGIC */
|
|
uint64_t ub_version; /* SPA_VERSION */
|
|
uint64_t ub_txg; /* txg of last sync */
|
|
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;
|
|
|
|
/* Maybe missing in uberblocks we read, but always written */
|
|
uint64_t ub_mmp_magic; /* MMP_MAGIC */
|
|
uint64_t ub_mmp_delay; /* nanosec since last MMP write */
|
|
uint64_t ub_mmp_seq; /* reserved for sequence number */
|
|
uint64_t ub_checkpoint_txg;
|
|
};
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_UBERBLOCK_IMPL_H */
|