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