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