lvm2/test/shell/lvconvert-cache-thin.sh

#!/usr/bin/env bash

# Copyright (C) 2014-2023 Red Hat, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

# Exercise usage of stacked cache volume used in thin pool volumes

SKIP_WITH_LVMLOCKD=1
SKIP_WITH_LVMPOLLD=1

. lib/inittest

aux have_cache 1 3 0 || skip
aux have_thin 1 0 0 || skip

aux prepare_vg 5 80

#
# Check caching of whole thin-pool
#
lvcreate -L10 -n cpool $vg
lvcreate -L10 -n tpool $vg
lvcreate -L10 -n $lv1 $vg

lvconvert --yes --cache --cachepool cpool $vg/tpool

lvconvert --yes --type thin-pool $vg/tpool

lvcreate -V10 -T -n $lv2 $vg/tpool

aux mkdev_md5sum $vg $lv2

lvconvert --splitcache $vg/tpool

check dev_md5sum $vg $lv2
lvchange -an $vg
lvchange -ay $vg
check dev_md5sum $vg $lv2

lvs -a $vg
lvconvert --yes --cache --cachepool cpool $vg/tpool

lvconvert --yes -T --thinpool $vg/tpool $vg/$lv1
check lv_field $vg/tpool segtype "thin-pool"
check lv_field $vg/$lv1 segtype "thin"
lvconvert --uncache $vg/tpool
lvs -a $vg

lvremove -f $vg


#
# Check caching of single individual thin LV
#
lvcreate --type cache-pool -L10 -n cpool $vg
lvcreate -T -L10 -V10 -n $lv1 $vg/tpool

lvconvert --yes -H --cachepool $vg/cpool $vg/$lv1
check lv_field $vg/${lv1}_corig segtype "thin" -a
check lv_field $vg/$lv1 segtype "cache"

# Other thins from the thin-pool can be created
lvcreate -V10 $vg/tpool

# ATM there is no support to take snapshot of cache thin LV
not lvcreate -s $vg/$lv1

# Use can take thick snapshot
lvcreate -s -L10 -n $lv2 $vg/$lv1
check lv_field $vg/$lv2 segtype "linear"

lvchange -an $vg
lvchange -ay $vg

lvconvert --uncache $vg/$lv1

lvremove -f $vg


#
# Check conversion of cached LV works as thin-pool
#
lvcreate -L10 -n $lv $vg
lvcreate -L10 -n $lv1 $vg
lvcreate -H -L10 $vg/$lv

# Stack of cache over cache is unsupported ATM
fail lvconvert --yes --cachepool $vg/$lv

# Thin-pool cannot use cached metaddata LV  (meta should be on FAST device)
fail lvconvert --yes --thinpool $vg/$lv1 --poolmetadata $vg/$lv

# Thin-pool CAN use cached data LV
lvconvert --yes --thinpool $vg/$lv

lvremove -f $vg

# Check we can active snapshot of cached external origin (BZ: 1967744)
lvcreate -T -L10M $vg/pool "$dev1"

lvcreate -L10M -n origin $vg "$dev1"
lvcreate -H -L4M -n CPOOL $vg/origin "$dev2"

# Use cached origin as external origin
lvconvert -y -T --thinpool $vg/pool --originname extorig origin

# Check we can easily create snapshot of such LV
lvcreate -y -kn -n snap -s $vg/origin

# Deactivate everything and do a component activation of _cmeta volume
lvchange -an $vg
lvchange -ay -y $vg/CPOOL_cpool_cmeta

# Now this must fail since component volume is active
not lvcreate -y -kn -n snap2 -s $vg/origin |& tee err
grep "cmeta is active" err

vgremove -f $vg