1#!/usr/bin/env bash 2# 3# Test the handling of errors in write requests with multiple allocations 4# 5# Copyright (C) 2020 Igalia, S.L. 6# Author: Alberto Garcia <berto@igalia.com> 7# 8# This program is free software; you can redistribute it and/or modify 9# it under the terms of the GNU General Public License as published by 10# the Free Software Foundation; either version 2 of the License, or 11# (at your option) any later version. 12# 13# This program is distributed in the hope that it will be useful, 14# but WITHOUT ANY WARRANTY; without even the implied warranty of 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16# GNU General Public License for more details. 17# 18# You should have received a copy of the GNU General Public License 19# along with this program. If not, see <http://www.gnu.org/licenses/>. 20# 21 22# creator 23owner=berto@igalia.com 24 25seq=`basename $0` 26echo "QA output created by $seq" 27 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33} 34trap "_cleanup; exit \$status" 0 1 2 3 15 35 36# get standard environment, filters and checks 37. ./common.rc 38. ./common.filter 39 40_supported_fmt qcow2 41_supported_proto file 42_supported_os Linux 43_unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file 44 45echo '### Create the image' 46_make_test_img -o refcount_bits=64,cluster_size=1k 1M 47 48# The reference counts of the clusters for the first 123k of this 49# write request are stored in the first refcount block. The last 50# cluster (guest offset 123k) is referenced in the second refcount 51# block. 52echo '### Fill the first refcount block and one data cluster from the second' 53$QEMU_IO -c 'write 0 124k' "$TEST_IMG" | _filter_qemu_io 54 55echo '### Discard two of the last data clusters, leave one in the middle' 56$QEMU_IO -c 'discard 121k 1k' "$TEST_IMG" | _filter_qemu_io 57$QEMU_IO -c 'discard 123k 1k' "$TEST_IMG" | _filter_qemu_io 58 59echo '### Corrupt the offset of the second refcount block' 60refcount_table_offset=$(peek_file_be "$TEST_IMG" 48 8) 61poke_file "$TEST_IMG" $(($refcount_table_offset+14)) "\x06" 62 63# This tries to allocate the two clusters discarded earlier (guest 64# offsets 121k and 123k). Their reference counts are in the first and 65# second refcount blocks respectively, but only the first one can be 66# allocated correctly because the second entry of the refcount table 67# is corrupted. 68echo '### Try to allocate the discarded clusters again' 69$QEMU_IO -c 'write 121k 3k' "$TEST_IMG" | _filter_qemu_io 70 71# success, all done 72echo "*** done" 73rm -f $seq.full 74status=0 75