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#!/usr/bin/env bash
# Copyright (C) 2019 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 merge of old snapshots over thin
export LVM_TEST_THIN_REPAIR_CMD=${LVM_TEST_THIN_REPAIR_CMD-/bin/false}
. lib/inittest
aux target_at_least dm-snapshot-merge 1 0 0 || skip
aux have_thin 1 0 0 || skip
aux prepare_vg 2
lvcreate -T -L1 -V1 -n $lv1 $vg/pool "$dev1"
lvcreate -s -n $lv2 $vg/$lv1
# Take also thick snapshot of thin snapshot
lvcreate -s -L1 -n $lv3 $vg/$lv2
sleep 10 < "$DM_DEV_DIR/$vg/$lv1" >/dev/null 2>&1 &
PID_SLEEP=$!
# initiated merge that cannot proceed, but there is no need to retry
lvconvert --config 'activation/retry_deactivation=0' --merge $vg/$lv2
kill $PID_SLEEP
wait
# Remove everything
lvremove --yes $vg
# No LV left in VG
check vg_field $vg lv_count "0"
# Create again pool with thin and thick snapshot
lvcreate -T -L1 -V1 -n $lv1 $vg/pool "$dev1"
lvcreate -s -n $lv2 -L2 $vg/$lv1 "$dev2"
dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv2" bs=1M count=1 oflag=direct
lvs -a -o+lv_merging,lv_merge_failed $vg
aux delay_dev "$dev1" 0 400 "$(get first_extent_sector "$dev1"):"
# Initiate background merge
lvconvert -b --merge $vg/$lv2
# Query status of snapshot immediately after start
# - may hit race of checking already in-progress merge
#lvs -a -o+lv_merging,lv_merge_failed $vg
check lv_field $vg/$lv1 lv_merging "merging"
lvm lvpoll -i 1 --polloperation merge $vg/$lv1
# Here should be everything already merged
#lvs -a -o+lv_merging,lv_merge_failed $vg
# check we see thin filled 100% (1MiB written to 1MiB LV)
check lv_field $vg/$lv1 data_percent "100.00"
# -real must not exist for $vg/$lv1
not dmsetup info ${vg}-${lv1}-real 2>&1 | tee out
grep "not exist" out
not dmsetup info ${vg}-${lv2}-cow 2>&1 | tee out
grep "not exist" out
check lv_not_exists $vg $lv2
vgremove -f $vg
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