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#!/usr/bin/env bash
# Copyright (C) 2016 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 snapshot merge also when stacked
export LVM_TEST_THIN_REPAIR_CMD=${LVM_TEST_THIN_REPAIR_CMD-/bin/false}
. lib/inittest
which mkfs.ext3 || skip
aux target_at_least dm-snapshot-merge 1 0 0 || skip
aux prepare_vg 2 100
snap_and_merge() {
lvcreate -s -n $lv2 -L20 $vg/$lv1 "$dev2"
#dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=1M count=10 conv=fdatasync
aux udev_wait
mkfs.ext3 "$DM_DEV_DIR/$vg/$lv2"
sync
lvs -a $vg
SLEEP_PID=$(aux hold_device_open $vg $lv1 20)
# initiate background merge
lvconvert -b --merge $vg/$lv2
lvs -a -o+lv_merging,lv_merge_failed $vg
get lv_field $vg/$lv1 lv_attr | grep "Owi-ao"
get lv_field $vg/$lv2 lv_attr | grep "Swi-a-s---"
kill $SLEEP_PID
aux delay_dev "$dev1" 0 200 "$(get first_extent_sector "$dev1"):"
lvchange --poll n --refresh $vg/$lv1
dmsetup table
lvs -av -o+lv_merging,lv_merge_failed $vg
# Origin is closed and snapshot merge could run
get lv_field $vg/$lv1 lv_attr | grep "Owi-a-"
sleep 1
check lv_attr_bit state $vg/$lv2 "a"
aux error_dev "$dev2" "$(get first_extent_sector "$dev2"):"
aux enable_dev "$dev1"
# delay to let snapshot merge 'discover' failing COW device
sleep 1
sync
dmsetup status
lvs -a -o+lv_merging,lv_merge_failed $vg
check lv_attr_bit state $vg/$lv1 "m"
check lv_attr_bit state $vg/$lv2 "m"
# device OK and running in full speed
aux enable_dev "$dev2"
# reactivate so merge can finish
lvchange -an $vg
lvchange -ay $vg
sleep 1
lvs -a -o+lv_merging,lv_merge_failed $vg
check lv_not_exists $vg $lv2
fsck -n "$DM_DEV_DIR/$vg/$lv1"
lvremove -f $vg
}
# First check merge on plain linear LV
lvcreate -aey -L50 -n $lv1 $vg "$dev1"
snap_and_merge
# When available check merge of old snapshot with Thin LV being origin
if aux have_thin 1 0 0 ; then
lvcreate -T -L10 -V50 -n $lv1 $vg/pool "$dev1"
snap_and_merge
fi
# TODO snapshot merge with Mirror, Raid, Cache...
vgremove -f $vg
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