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Add "compatibility" property for zpool feature sets
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
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‎cmd/zpool/Makefile.am

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@@ -39,7 +39,7 @@ include $(top_srcdir)/config/CppCheck.am
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zpoolconfdir = $(sysconfdir)/zfs/zpool.d
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zpoolexecdir = $(zfsexecdir)/zpool.d
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EXTRA_DIST = zpool.d/README
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EXTRA_DIST = zpool.d/README compatibility.d
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dist_zpoolexec_SCRIPTS = \
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zpool.d/dm-deps \
@@ -129,10 +129,55 @@ zpoolconfdefaults = \
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test_progress \
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test_ended
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zpoolcompatdir = $(pkgdatadir)/compatibility.d
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dist_zpoolcompat_DATA = \
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compatibility.d/compat-2018 \
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compatibility.d/compat-2019 \
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compatibility.d/compat-2020 \
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compatibility.d/compat-2021 \
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compatibility.d/freebsd-11.0 \
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compatibility.d/freebsd-11.2 \
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compatibility.d/freebsd-11.3 \
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compatibility.d/freenas-9.10.2 \
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compatibility.d/grub2 \
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compatibility.d/openzfsonosx-1.7.0 \
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compatibility.d/openzfsonosx-1.8.1 \
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compatibility.d/openzfsonosx-1.9.3 \
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compatibility.d/openzfs-2.0-freebsd \
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compatibility.d/openzfs-2.0-linux \
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compatibility.d/zol-0.6.5 \
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compatibility.d/zol-0.7 \
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compatibility.d/zol-0.8
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# canonical <- alias symbolic link pairs
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# eg: "2018" is a link to "compat-2018"
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zpoolcompatlinks = \
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"compat-2018 2018" \
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"compat-2019 2019" \
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"compat-2020 2020" \
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"compat-2021 2021" \
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"freebsd-11.0 freebsd-11.1" \
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"freebsd-11.0 freenas-11.0" \
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"freebsd-11.2 freenas-11.2" \
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"freebsd-11.3 freebsd-11.4" \
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"freebsd-11.3 freebsd-12.0" \
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"freebsd-11.3 freebsd-12.1" \
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"freebsd-11.3 freebsd-12.2" \
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"freebsd-11.3 freenas-11.3" \
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"freenas-11.0 freenas-11.1" \
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"openzfsonosx-1.9.3 openzfsonosx-1.9.4" \
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"openzfs-2.0-freebsd truenas-12.0" \
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"zol-0.7 ubuntu-18.04" \
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"zol-0.8 ubuntu-20.04"
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install-data-hook:
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$(MKDIR_P) "$(DESTDIR)$(zpoolconfdir)"
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for f in $(zpoolconfdefaults); do \
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test -f "$(DESTDIR)$(zpoolconfdir)/$${f}" -o \
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-L "$(DESTDIR)$(zpoolconfdir)/$${f}" || \
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ln -s "$(zpoolexecdir)/$${f}" "$(DESTDIR)$(zpoolconfdir)"; \
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done
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for l in $(zpoolcompatlinks); do \
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(cd "$(DESTDIR)$(zpoolcompatdir)"; ln -s $${l} ); \
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done

‎cmd/zpool/compatibility.d/compat-2018

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# Features supported by all Tier 1 platforms as of 2018
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async_destroy
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bookmarks
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embedded_data
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empty_bpobj
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enabled_txg
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extensible_dataset
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filesystem_limits
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hole_birth
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large_blocks
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lz4_compress
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spacemap_histogram

‎cmd/zpool/compatibility.d/compat-2019

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# Features supported by all Tier 1 platforms as of 2019
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async_destroy
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bookmarks
4+
embedded_data
5+
empty_bpobj
6+
enabled_txg
7+
extensible_dataset
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filesystem_limits
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hole_birth
10+
large_blocks
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lz4_compress
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multi_vdev_crash_dump
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sha512
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skein
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spacemap_histogram

‎cmd/zpool/compatibility.d/compat-2020

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# Features supported by all Tier 1 platforms as of 2020
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async_destroy
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bookmarks
4+
embedded_data
5+
empty_bpobj
6+
enabled_txg
7+
extensible_dataset
8+
filesystem_limits
9+
hole_birth
10+
large_blocks
11+
lz4_compress
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multi_vdev_crash_dump
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sha512
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skein
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spacemap_histogram

‎cmd/zpool/compatibility.d/compat-2021

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# Features supported by all Tier 1 platforms as of 2021
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async_destroy
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bookmarks
4+
device_removal
5+
embedded_data
6+
empty_bpobj
7+
enabled_txg
8+
extensible_dataset
9+
filesystem_limits
10+
hole_birth
11+
large_blocks
12+
lz4_compress
13+
multi_vdev_crash_dump
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obsolete_counts
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sha512
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skein
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spacemap_histogram
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spacemap_v2
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zpool_checkpoint

‎cmd/zpool/compatibility.d/freebsd-11.0

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# Features supported by FreeBSD 11.0
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async_destroy
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bookmarks
4+
embedded_data
5+
empty_bpobj
6+
enabled_txg
7+
extensible_dataset
8+
filesystem_limits
9+
hole_birth
10+
large_blocks
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lz4_compress
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multi_vdev_crash_dump
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sha512
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skein
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spacemap_histogram

‎cmd/zpool/compatibility.d/freebsd-11.2

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# Features supported by FreeBSD 11.2
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async_destroy
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bookmarks
4+
device_removal
5+
embedded_data
6+
empty_bpobj
7+
enabled_txg
8+
extensible_dataset
9+
filesystem_limits
10+
hole_birth
11+
large_blocks
12+
lz4_compress
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multi_vdev_crash_dump
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obsolete_counts
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sha512
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skein
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spacemap_histogram
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zpool_checkpoint

‎cmd/zpool/compatibility.d/freebsd-11.3

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# Features supported by FreeBSD 11.3
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async_destroy
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bookmarks
4+
device_removal
5+
embedded_data
6+
empty_bpobj
7+
enabled_txg
8+
extensible_dataset
9+
filesystem_limits
10+
hole_birth
11+
large_blocks
12+
lz4_compress
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multi_vdev_crash_dump
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obsolete_counts
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sha512
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skein
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spacemap_histogram
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spacemap_v2
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zpool_checkpoint

‎cmd/zpool/compatibility.d/freenas-9.10.2

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# Features supported by FreeNAS 9.10.2
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async_destroy
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bookmarks
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embedded_data
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empty_bpobj
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enabled_txg
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extensible_dataset
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filesystem_limits
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hole_birth
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large_blocks
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lz4_compress
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multi_vdev_crash_dump
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spacemap_histogram

‎cmd/zpool/compatibility.d/grub2

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# Features which are supported by GRUB2
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async_destroy
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bookmarks
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embedded_data
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empty_bpobj
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enabled_txg
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extensible_dataset
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filesystem_limits
9+
hole_birth
10+
large_blocks
11+
lz4_compress
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spacemap_histogram

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