#!/bin/sh

# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

# Test repairing of broken thin pool metadata 

. lib/test

# Set tools from configuration (set by Makefile)
# Allow user override to take tools from unusual places
LVM_TEST_THIN_CHECK_CMD=${LVM_TEST_THIN_CHECK_CMD:-thin_check}
LVM_TEST_THIN_DUMP_CMD=${LVM_TEST_THIN_DUMP_CMD:-thin_dump}
LVM_TEST_THIN_REPAIR_CMD=${LVM_TEST_THIN_REPAIR_CMD:-thin_repair}

which mkfs.ext2 || skip

# Maybe check also version of the tools here??
which $LVM_TEST_THIN_CHECK_CMD || skip
which $LVM_TEST_THIN_DUMP_CMD || skip
which $LVM_TEST_THIN_REPAIR_CMD || skip

#
# Main
#
aux have_thin 1 0 0 || skip

aux prepare_vg 4

# Create LV
lvcreate -T -L20 -V10 -n $lv1 $vg/pool  "$dev1" "$dev2"
lvcreate -T -V10 -n $lv2 $vg/pool

mkfs.ext2 $DM_DEV_DIR/$vg/$lv1
mkfs.ext2 $DM_DEV_DIR/$vg/$lv2

lvcreate -L20 -n repair $vg
lvcreate -L2 -n fixed $vg

lvs -a -o+seg_pe_ranges $vg
#aux error_dev "$dev2" 2050:1

# Make some repairable metadata damage??
vgchange -an $vg

lvconvert --repair $vg/pool

lvs -a $vg

# Test swapping - swap out thin-pool's metadata with our repair volume
lvconvert -y -f --poolmetadata $vg/repair --thinpool $vg/pool

lvchange -aey $vg/repair $vg/fixed

#dd if=$DM_DEV_DIR/$vg/repair of=back bs=1M

# Make some 'repairable' damage??
dd if=/dev/zero of=$DM_DEV_DIR/$vg/repair bs=1 seek=40960 count=1

#dd if=$DM_DEV_DIR/$vg/repair of=back_trashed bs=1M
#not vgchange -ay $vg

#lvconvert --repair $vg/pool

# Using now SHOULD - since thin tools currently do not seem to work
should not $THIN_CHECK $DM_DEV_DIR/$vg/repair

should not $LVM_TEST_THIN_DUMP_CMD $DM_DEV_DIR/$vg/repair | tee dump

should $LVM_TEST_THIN_REPAIR_CMD -i $DM_DEV_DIR/$vg/repair -o $DM_DEV_DIR/$vg/fixed

should $THIN_CHECK $DM_DEV_DIR/$vg/fixed

# Swap repaired metadata back
lvconvert -y -f --poolmetadata $vg/fixed --thinpool $vg/pool
lvs -a $vg

# Activate pool - this should now work
should vgchange -ay $vg

lvs -a -o+devices $vg 
dmsetup table
dmsetup info -c
dmsetup ls --tree

# Currently in troubles - we can't remove thin volume from broken pool
lvchange -an $vg/repair
lvchange -an $vg/fixed
lvchange -an $vg/pool_tmeta0
dmsetup remove $vg-pool_tdata
dmsetup remove $vg-pool_tmeta


dmsetup table

# FIXME: needs  also --yes with double force 
pvremove --yes -ff "$dev1"
pvremove --yes -ff "$dev2"

# FIXME: pv1 & pv2 are removed so pv3 & pv4 have no real LVs,
# yet vgremove is refusing to do its jobs and suggest --partial??
should vgremove -ff  $vg

# FIXME: stressing even more - there are no pool PV, we do not pass...
should vgreduce --removemissing -f $vg
should vgremove -ff  $vg

# Let's do a final forced cleanup
pvremove --yes -ff "$dev3"
pvremove --yes -ff "$dev4"