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Add "compatibility" property for zpool feature sets

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Property to allow sets of features to be specified; for compatibility
with specific versions / releases / external systems. Influences
the behavior of 'zpool upgrade' and 'zpool create'. Initial man
page changes and test cases included.

Brief synopsis:

zpool create -o compatibility=off|legacy|file[,file...] pool vdev...

compatibility = off : disable compatibility mode (enable all features)
compatibility = legacy : request that no features be enabled
compatibility = file[,file...] : read features from specified files.
Only features present in *all* files will be enabled on the
resulting pool. Filenames may be absolute, or relative to
/etc/zfs/compatibility.d or /usr/share/zfs/compatibility.d (/etc
checked first).

Only affects zpool create, zpool upgrade and zpool status.

ABI changes in libzfs:

* New function "zpool_load_compat" to load and parse compat sets.
* Add "zpool_compat_status_t" typedef for compatibility parse status.
* Add ZPOOL_PROP_COMPATIBILITY to the pool properties enum
* Add ZPOOL_STATUS_COMPATIBILITY_ERR to the pool status enum

An initial set of base compatibility sets are included in
cmd/zpool/compatibility.d, and the Makefile for cmd/zpool is
modified to install these in $pkgdatadir/compatibility.d and to
create symbolic links to a reasonable set of aliases.

Reviewed-by: ericloewe
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Colm Buckley <colm@tuatha.org>
Closes #11468
This commit is contained in:
Colm
2021-02-18 05:30:45 +00:00
committed by GitHub
parent 35ec51796f
commit 658fb8020f
48 changed files with 5621 additions and 2954 deletions
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lib/libzutil/zutil_import.c
+10
View File
@@ -24,6 +24,7 @@
* Copyright (c) 2012, 2018 by Delphix. All rights reserved.
* Copyright 2015 RackTop Systems.
* Copyright (c) 2016, Intel Corporation.
* Copyright (c) 2021, Colm Buckley <colm@tuatha.org>
*/
/*
@@ -552,12 +553,14 @@ get_configs(libpc_handle_t *hdl, pool_list_t *pl, boolean_t active_ok,
* pool guid
* name
* comment (if available)
* compatibility features (if available)
* pool state
* hostid (if available)
* hostname (if available)
*/
uint64_t state, version;
char *comment = NULL;
char *compatibility = NULL;
version = fnvlist_lookup_uint64(tmp,
ZPOOL_CONFIG_VERSION);
@@ -577,6 +580,13 @@ get_configs(libpc_handle_t *hdl, pool_list_t *pl, boolean_t active_ok,
fnvlist_add_string(config,
ZPOOL_CONFIG_COMMENT, comment);
if (nvlist_lookup_string(tmp,
ZPOOL_CONFIG_COMPATIBILITY,
&compatibility) == 0)
fnvlist_add_string(config,
ZPOOL_CONFIG_COMPATIBILITY,
compatibility);
state = fnvlist_lookup_uint64(tmp,
ZPOOL_CONFIG_POOL_STATE);
fnvlist_add_uint64(config,