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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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scripts/Makefile.am
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@@ -34,6 +34,7 @@ export ZEDLET_ETC_DIR=$$CMD_DIR/zed/zed.d
export ZEDLET_LIBEXEC_DIR=$$CMD_DIR/zed/zed.d
export ZPOOL_SCRIPT_DIR=$$CMD_DIR/zpool/zpool.d
export ZPOOL_SCRIPTS_PATH=$$CMD_DIR/zpool/zpool.d
export ZPOOL_COMPAT_DIR=$$CMD_DIR/zpool/compatibility.d
export CONTRIB_DIR=@abs_top_builddir@/contrib
export LIB_DIR=@abs_top_builddir@/lib
export SYSCONF_DIR=@abs_top_builddir@/etc