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| author | avg <avg@FreeBSD.org> | 2017-09-19 09:26:13 +0000 |
|---|---|---|
| committer | avg <avg@FreeBSD.org> | 2017-09-19 09:26:13 +0000 |
| commit | 89c4519007baae4074de02c1d5e70fff8960e2eb (patch) | |
| tree | 1faa65775d22287d399887dd29d73963f75cc2f5 | |
| parent | b8768cac5f0937ead55cabe714dffbd80da87f88 (diff) | |
| download | FreeBSD-src-89c4519007baae4074de02c1d5e70fff8960e2eb.zip FreeBSD-src-89c4519007baae4074de02c1d5e70fff8960e2eb.tar.gz | |
MFC r322241: MFV r322240: 8491 uberblock on-disk padding to reserve space for smoothly merging zpool checkpoint & MMP in ZFS
illumos/illumos-gate@79c2b812ee2010ebf20fdd92dc5f06b59000a94c
https://github.com/illumos/illumos-gate/commit/79c2b812ee2010ebf20fdd92dc5f06b59000a94c
https://www.illumos.org/issues/8491
The zpool checkpoint feature in DxOS added a new field in the uberblock.
The Multi-Modifier Protection Pull Request from ZoL adds two 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.
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>
Author: Serapheim Dimitropoulos <serapheim@delphix.com>
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/uberblock_impl.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/uberblock_impl.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/uberblock_impl.h index 6ab6aa3..2d5e845 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/uberblock_impl.h +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/uberblock_impl.h @@ -20,6 +20,7 @@ */ /* * 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 @@ -54,6 +55,12 @@ struct uberblock { /* highest SPA_VERSION supported by software that wrote this txg */ uint64_t ub_software_version; + + /* These fields are reserved for features that are under development: */ + uint64_t ub_mmp_magic; + uint64_t ub_mmp_delay; + uint64_t ub_mmp_seq; + uint64_t ub_checkpoint_txg; }; #ifdef __cplusplus |
