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" 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# This tests qocw2-specific low-level functionality 41_supported_fmt qcow2 42_supported_proto generic 43_supported_os Linux 44 45# Intentionally create an unaligned image 46IMGOPTS="compat=1.1" 47IMG_SIZE=$((64 * 1024 * 1024 + 512)) 48 49echo 50echo "=== Testing cluster discards ===" 51echo 52_make_test_img $IMG_SIZE 53# Write some normal clusters, zero some of them (creating preallocated 54# zero clusters) and discard everything. Everything should now read as 0. 55$QEMU_IO -c "write 0 256k" -c "write -z 0 256k" -c "write 64M 512" \ 56 -c "discard 0 $IMG_SIZE" -c "read -P 0 0 $IMG_SIZE" "$TEST_IMG" \ 57 | _filter_qemu_io 58# Check the image (there shouldn't be any leaks) 59_check_test_img 60 61# success, all done 62echo "*** done" 63rm -f $seq.full 64status=0 65