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#!/usr/bin/env bash
# Copyright (C) 2013 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
# test merge of thin snapshot
export LVM_TEST_THIN_REPAIR_CMD=${LVM_TEST_THIN_REPAIR_CMD-/bin/false}
. lib/inittest
MKFS=mkfs.ext2
which $MKFS || skip
which fsck || skip
MKFS="$MKFS -b4096"
#
# Main
#
aux have_thin 1 0 0 || skip
aux prepare_vg 2
lvcreate -T -L8M $vg/pool -V10M -n $lv1
lvcreate -s -K -n snap $vg/$lv1
# check exclusive lock is preserved after merge
check lv_field "$vg/$lv1" lv_active_exclusively "active exclusively"
lvconvert --merge $vg/snap
check lv_field "$vg/$lv1" lv_active_exclusively "active exclusively"
lvremove -ff $vg
lvcreate -T -L8M $vg/pool -V10M -n $lv1
lvchange --addtag tagL $vg/$lv1
mkdir mnt
$MKFS "$DM_DEV_DIR/$vg/$lv1"
mount "$DM_DEV_DIR/$vg/$lv1" mnt
touch mnt/test
lvcreate -K -s -n snap --addtag tagS $vg/$lv1
mkdir mntsnap
$MKFS "$DM_DEV_DIR/$vg/snap"
mount "$DM_DEV_DIR/$vg/snap" mntsnap
touch mntsnap/test_snap
lvs -o+tags,thin_id $vg
lvcreate -s -n snap1 $vg/$lv1
lvconvert --merge $vg/snap &>out
grep "Merging of thin snapshot $vg/snap will occur on next activation of $vg/${lv1}." out
# Can't merge another snapshot while "snap" is still being 'merged'.
not lvconvert --merge $vg/snap1 &>out
grep "Cannot merge snapshot" out
# Check lvdisplay is not crashing while merge needs to wait
lvdisplay -a $vg
umount mnt
# Merge cannot happen
lvchange --refresh $vg/$lv1
check lv_field $vg/$lv1 thin_id "1"
# Fails since it cannot deactivate both
not lvchange -an $vg/$lv1
# But test $lv1 is not active
check inactive $vg $lv1
# Also still cannot reactivate $lv1
not lvchange -ay $vg/$lv1
umount mntsnap
lvdisplay -a $vg | tee out
grep "merged with" out
grep "merging to" out
# Check there is no support for manipulation with hidden 'snap'
not lvchange --refresh $vg/snap
not lvchange -an $vg/snap
not lvremove $vg/snap
# Finally deactivate 'snap' again via $lv1
lvchange -an $vg/$lv1
# Still must not be activable
not lvchange -K -ay $vg/snap
lvs -a -o +tags,thin_id $vg
# Test if merge happens
lvchange -ay $vg/$lv1
check lv_exists $vg $lv1
check lv_field $vg/$lv1 thin_id "2"
check lv_field $vg/$lv1 tags "tagL"
check lv_not_exists $vg snap
fsck -n "$DM_DEV_DIR/$vg/$lv1"
mount "$DM_DEV_DIR/$vg/$lv1" mnt
test -e mnt/test_snap
umount mnt
# test if thin snapshot has also 'old-snapshot'
lvcreate -s -n snap $vg/$lv1
# Also add old snapshot to thin origin
lvcreate -s -L10 -n oldsnapof_${lv1} $vg/$lv1
not lvconvert --merge $vg/snap
$MKFS "$DM_DEV_DIR/$vg/oldsnapof_${lv1}"
lvconvert --merge $vg/oldsnapof_${lv1}
fsck -n "$DM_DEV_DIR/$vg/$lv1"
check lv_not_exists $vg oldsnapof_${lv1}
# Add old snapshot to thin snapshot
lvcreate -s -L10 -n oldsnapof_snap $vg/snap
lvconvert --merge $vg/snap
lvremove -f $vg/oldsnapof_snap
check lv_field $vg/$lv1 thin_id "4"
# Check --mergethin
lvcreate -s -n snap $vg/$lv1
check lv_field $vg/snap thin_id "5"
lvconvert --mergethin $vg/snap &>out
grep "Volume $vg/snap replaced origin $vg/${lv1}." out
check lv_field $vg/$lv1 thin_id "5"
vgremove -ff $vg
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