1#!/bin/bash 2# 3# Test case for discarding preallocated zero clusters in qcow2 4# 5# Copyright (C) 2013 Red Hat, Inc. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21# creator 22owner=mreitz@redhat.com 23 24seq="$(basename $0)" 25echo "QA output created by $seq" 26 27here="$PWD" 28tmp=/tmp/$$ 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# This tests qocw2-specific low-level functionality 42_supported_fmt qcow2 43_supported_proto generic 44_supported_os Linux 45 46IMGOPTS="compat=1.1" 47IMG_SIZE=64M 48 49echo 50echo "=== Testing snapshotting an image with zero clusters ===" 51echo 52_make_test_img $IMG_SIZE 53# Write some normal clusters, zero them (creating preallocated zero clusters) 54# and discard those 55$QEMU_IO -c "write 0 256k" -c "write -z 0 256k" -c "discard 0 256k" "$TEST_IMG" \ 56 | _filter_qemu_io 57# Check the image (there shouldn't be any leaks) 58_check_test_img 59 60# success, all done 61echo "*** done" 62rm -f $seq.full 63status=0 64