#!/usr/bin/env bash
# group: rw auto backing quick
#
# Test qemu-img rebase with zero clusters
#
# Copyright (C) 2013 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# creator
owner=pbonzini@redhat.com

seq=`basename $0`
echo "QA output created by $seq"

status=1	# failure is the default!

_cleanup()
{
    _cleanup_test_img
    _rm_test_img "$TEST_IMG.old"
    _rm_test_img "$TEST_IMG.new"
}
trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common.rc
. ./common.filter

_supported_fmt qcow2 qed
_supported_proto file fuse

echo
echo "== Creating images =="

TEST_IMG_SAVE="$TEST_IMG"
TEST_IMG="$TEST_IMG.old"

size=10M
_make_test_img $size
$QEMU_IO -c "write -P 0x40 0 1048576" "$TEST_IMG" | _filter_qemu_io

TEST_IMG="$TEST_IMG_SAVE.new"

_make_test_img $size
$QEMU_IO -c "write -P 0x5a 0 1048576" "$TEST_IMG" | _filter_qemu_io

TEST_IMG="$TEST_IMG_SAVE"

_make_test_img -b "$TEST_IMG.old" -F $IMGFMT $size
$QEMU_IO -c "write -z 0 1048576" "$TEST_IMG" | _filter_qemu_io

echo
echo "== Rebasing the image =="

$QEMU_IMG rebase -b "$TEST_IMG.new" -F $IMGFMT "$TEST_IMG"
$QEMU_IO -c "read -P 0x00 0 1048576" "$TEST_IMG" | _filter_qemu_io

# success, all done
echo "*** done"
rm -f $seq.full
status=0