1#!/usr/bin/env bash 2# 3# General test case for qcow2's image check 4# 5# Copyright (C) 2015 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 $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32} 33trap "_cleanup; exit \$status" 0 1 2 3 15 34 35# get standard environment, filters and checks 36. ./common.rc 37. ./common.filter 38 39# This tests qcow2-specific low-level functionality 40_supported_fmt qcow2 41_supported_proto file 42_supported_os Linux 43# With an external data file, data clusters are not refcounted 44# (and so qemu-img check does not check their refcount) 45_unsupported_imgopts data_file 46 47echo 48echo '=== Check on an image with a multiple of 2^32 clusters ===' 49echo 50 51_make_test_img -o "cluster_size=512" 512 52 53# Allocate L2 table 54$QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io 55 56# Put the data cluster at a multiple of 2 TB, resulting in the image apparently 57# having a multiple of 2^32 clusters 58# (To be more specific: It is at 32 PB) 59poke_file "$TEST_IMG" $((2048 + 8)) "\x00\x80\x00\x00\x00\x00\x00\x00" 60 61# An offset of 32 PB results in qemu-img check having to allocate an in-memory 62# refcount table of 128 TB (16 bit refcounts, 512 byte clusters), if qemu-img 63# don't check that referenced data cluster is far beyond the end of file. 64# But starting from 4.0, qemu-img does this check, and instead of "Cannot 65# allocate memory", we have an error showing that l2 entry is invalid. 66_check_test_img 67 68# success, all done 69echo "*** done" 70rm -f $seq.full 71status=0 72