1#!/usr/bin/env bash 2# 3# Test resizing a qcow2 image with a backing file 4# 5# Copyright (C) 2020 Igalia, S.L. 6# Author: Alberto Garcia <berto@igalia.com> 7# 8# This program is free software; you can redistribute it and/or modify 9# it under the terms of the GNU General Public License as published by 10# the Free Software Foundation; either version 2 of the License, or 11# (at your option) any later version. 12# 13# This program is distributed in the hope that it will be useful, 14# but WITHOUT ANY WARRANTY; without even the implied warranty of 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16# GNU General Public License for more details. 17# 18# You should have received a copy of the GNU General Public License 19# along with this program. If not, see <http://www.gnu.org/licenses/>. 20# 21 22# creator 23owner=berto@igalia.com 24 25seq=`basename $0` 26echo "QA output created by $seq" 27 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33} 34trap "_cleanup; exit \$status" 0 1 2 3 15 35 36# get standard environment, filters and checks 37. ./common.rc 38. ./common.filter 39 40_supported_fmt qcow2 41_supported_proto file fuse 42_supported_os Linux 43# We need qemu-img map to show the file where the data is allocated, 44# but with an external data file, it will show that instead of the 45# file we want to check. So just skip this test for external data 46# files. 47_unsupported_imgopts data_file 48 49echo '### Create the backing image' 50BACKING_IMG="$TEST_IMG.base" 51TEST_IMG="$BACKING_IMG" _make_test_img 1M 52 53echo '### Fill the backing image with data (0x11)' 54$QEMU_IO -c 'write -P 0x11 0 1M' "$BACKING_IMG" | _filter_qemu_io 55 56echo '### Create the top image' 57_make_test_img -F "$IMGFMT" -b "$BACKING_IMG" 58 59echo '### Fill the top image with data (0x22)' 60$QEMU_IO -c 'write -P 0x22 0 1M' "$TEST_IMG" | _filter_qemu_io 61 62# Both offsets are part of the same cluster. 63echo '### Shrink the image to 520k' 64$QEMU_IMG resize --shrink "$TEST_IMG" 520k 65echo '### Grow the image to 567k' 66$QEMU_IMG resize "$TEST_IMG" 567k 67 68echo '### Check that the tail of the image reads as zeroes' 69$QEMU_IO -c 'read -P 0x22 0 520k' "$TEST_IMG" | _filter_qemu_io 70$QEMU_IO -c 'read -P 0x00 520k 47k' "$TEST_IMG" | _filter_qemu_io 71 72echo '### Show output of qemu-img map' 73$QEMU_IMG map "$TEST_IMG" | _filter_testdir 74 75# success, all done 76echo "*** done" 77rm -f $seq.full 78status=0 79