1#!/bin/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 $seq" 26 27here="$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 file 43_supported_os Linux 44 45echo 46echo '=== Check on an image with a multiple of 2^32 clusters ===' 47echo 48 49IMGOPTS=$(_optstr_add "$IMGOPTS" "cluster_size=512") \ 50 _make_test_img 512 51 52# Allocate L2 table 53$QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io 54 55# Put the data cluster at a multiple of 2 TB, resulting in the image apparently 56# having a multiple of 2^32 clusters 57# (To be more specific: It is at 32 PB) 58poke_file "$TEST_IMG" 2048 "\x80\x80\x00\x00\x00\x00\x00\x00" 59 60# An offset of 32 PB results in qemu-img check having to allocate an in-memory 61# refcount table of 128 TB (16 bit refcounts, 512 byte clusters). 62# This should be generally too much for any system and thus fail. 63# What this test is checking is that the qcow2 driver actually tries to allocate 64# such a large amount of memory (and is consequently aborting) instead of having 65# truncated the cluster count somewhere (which would result in much less memory 66# being allocated and then a segfault occurring). 67_check_test_img 68 69# success, all done 70echo "*** done" 71rm -f $seq.full 72status=0 73