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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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include/sys/fs/zfs.h
+17 -2
View File
@@ -27,10 +27,10 @@
* Copyright (c) 2014 Integros [integros.com]
* Copyright (c) 2017, Intel Corporation.
* Copyright (c) 2019 Datto Inc.
* Portions Copyright 2010 Robert Milkowski
* Copyright (c) 2021, Colm Buckley <colm@tuatha.org>
*/
/* Portions Copyright 2010 Robert Milkowski */
#ifndef _SYS_FS_ZFS_H
#define _SYS_FS_ZFS_H
@@ -246,6 +246,7 @@ typedef enum {
ZPOOL_PROP_CHECKPOINT,
ZPOOL_PROP_LOAD_GUID,
ZPOOL_PROP_AUTOTRIM,
ZPOOL_PROP_COMPATIBILITY,
ZPOOL_NUM_PROPS
} zpool_prop_t;
@@ -733,6 +734,7 @@ typedef struct zpool_load_policy {
#define ZPOOL_CONFIG_ALLOCATION_BIAS "alloc_bias" /* not stored on disk */
#define ZPOOL_CONFIG_EXPANSION_TIME "expansion_time" /* not stored */
#define ZPOOL_CONFIG_REBUILD_STATS "org.openzfs:rebuild_stats"
#define ZPOOL_CONFIG_COMPATIBILITY "compatibility"
/*
* The persistent vdev state is stored as separate values rather than a single
@@ -845,6 +847,19 @@ typedef struct zpool_load_policy {
*/
#define ZPOOL_CACHE_BOOT "/boot/zfs/zpool.cache"
#define ZPOOL_CACHE "/etc/zfs/zpool.cache"
/*
* Settings for zpool compatibility features files
*/
#define ZPOOL_SYSCONF_COMPAT_D SYSCONFDIR "/zfs/compatibility.d"
#define ZPOOL_DATA_COMPAT_D PKGDATADIR "/compatibility.d"
#define ZPOOL_COMPAT_MAXSIZE 16384
/*
* Hard-wired compatibility settings
*/
#define ZPOOL_COMPAT_LEGACY "legacy"
#define ZPOOL_COMPAT_OFF "off"
/*
* vdev states are ordered from least to most healthy.
* A vdev that's CANT_OPEN or below is considered unusable.