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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
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/spa.c
+30
View File
@@ -32,6 +32,7 @@
* Copyright (c) 2017, 2019, Datto Inc. All rights reserved.
* Copyright 2017 Joyent, Inc.
* Copyright (c) 2017, Intel Corporation.
* Copyright (c) 2021, Colm Buckley <colm@tuatha.org>
*/
/*
@@ -377,6 +378,11 @@ spa_prop_get_config(spa_t *spa, nvlist_t **nvp)
0, ZPROP_SRC_LOCAL);
}
if (spa->spa_compatibility != NULL) {
spa_prop_add_list(*nvp, ZPOOL_PROP_COMPATIBILITY,
spa->spa_compatibility, 0, ZPROP_SRC_LOCAL);
}
if (spa->spa_root != NULL)
spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root,
0, ZPROP_SRC_LOCAL);
@@ -1669,6 +1675,10 @@ spa_unload(spa_t *spa)
spa_strfree(spa->spa_comment);
spa->spa_comment = NULL;
}
if (spa->spa_compatibility != NULL) {
spa_strfree(spa->spa_compatibility);
spa->spa_compatibility = NULL;
}
spa_config_exit(spa, SCL_ALL, spa);
}
@@ -3249,6 +3259,7 @@ spa_ld_parse_config(spa_t *spa, spa_import_type_t type)
vdev_t *rvd;
uint64_t pool_guid;
char *comment;
char *compatibility;
/*
* Versioning wasn't explicitly added to the label until later, so if
@@ -3297,6 +3308,11 @@ spa_ld_parse_config(spa_t *spa, spa_import_type_t type)
if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0)
spa->spa_comment = spa_strdup(comment);
ASSERT(spa->spa_compatibility == NULL);
if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMPATIBILITY,
&compatibility) == 0)
spa->spa_compatibility = spa_strdup(compatibility);
(void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG,
&spa->spa_config_txg);
@@ -8668,6 +8684,20 @@ spa_sync_props(void *arg, dmu_tx_t *tx)
spa_history_log_internal(spa, "set", tx,
"%s=%s", nvpair_name(elem), strval);
break;
case ZPOOL_PROP_COMPATIBILITY:
strval = fnvpair_value_string(elem);
if (spa->spa_compatibility != NULL)
spa_strfree(spa->spa_compatibility);
spa->spa_compatibility = spa_strdup(strval);
/*
* Dirty the configuration on vdevs as above.
*/
if (tx->tx_txg != TXG_INITIAL)
vdev_config_dirty(spa->spa_root_vdev);
spa_history_log_internal(spa, "set", tx,
"%s=%s", nvpair_name(elem), strval);
break;
default:
/*
* Set pool property values in the poolprops mos object.
module/zfs/spa_config.c
+4
View File
@@ -24,6 +24,7 @@
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2011, 2020 by Delphix. All rights reserved.
* Copyright 2017 Joyent, Inc.
* Copyright (c) 2021, Colm Buckley <colm@tuatha.org>
*/
#include <sys/spa.h>
@@ -446,6 +447,9 @@ spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, int getstats)
if (spa->spa_comment != NULL)
fnvlist_add_string(config, ZPOOL_CONFIG_COMMENT,
spa->spa_comment);
if (spa->spa_compatibility != NULL)
fnvlist_add_string(config, ZPOOL_CONFIG_COMPATIBILITY,
spa->spa_compatibility);
hostid = spa_get_hostid(spa);
if (hostid != 0)