#!/usr/bin/env bash # # General test case for qcow2's image check # # Copyright (C) 2015 Red Hat, Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # # creator owner=mreitz@redhat.com seq="$(basename $0)" echo "QA output created by $seq" status=1 # failure is the default! _cleanup() { _cleanup_test_img } trap "_cleanup; exit \$status" 0 1 2 3 15 # get standard environment, filters and checks . ./common.rc . ./common.filter # This tests qocw2-specific low-level functionality _supported_fmt qcow2 _supported_proto file _supported_os Linux echo echo '=== Check on an image with a multiple of 2^32 clusters ===' echo IMGOPTS=$(_optstr_add "$IMGOPTS" "cluster_size=512") \ _make_test_img 512 # Allocate L2 table $QEMU_IO -c 'write 0 512' "$TEST_IMG" | _filter_qemu_io # Put the data cluster at a multiple of 2 TB, resulting in the image apparently # having a multiple of 2^32 clusters # (To be more specific: It is at 32 PB) poke_file "$TEST_IMG" 2048 "\x80\x80\x00\x00\x00\x00\x00\x00" # An offset of 32 PB results in qemu-img check having to allocate an in-memory # refcount table of 128 TB (16 bit refcounts, 512 byte clusters). # This should be generally too much for any system and thus fail. # What this test is checking is that the qcow2 driver actually tries to allocate # such a large amount of memory (and is consequently aborting) instead of having # truncated the cluster count somewhere (which would result in much less memory # being allocated and then a segfault occurring). _check_test_img # success, all done echo "*** done" rm -f $seq.full status=0