1#!/bin/bash 2# 3# I/O errors when working with internal qcow2 snapshots, and repairing 4# the result 5# 6# Copyright (C) 2018 Red Hat, Inc. 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 21seq=$(basename $0) 22echo "QA output created by $seq" 23 24status=1 # failure is the default! 25 26_cleanup() 27{ 28 _cleanup_test_img 29 rm -f "$TEST_DIR/blkdebug.conf" 30} 31trap "_cleanup; exit \$status" 0 1 2 3 15 32 33# get standard environment, filters and checks 34. ./common.rc 35. ./common.filter 36 37# This test is specific to qcow2 38_supported_fmt qcow2 39_supported_proto file 40_supported_os Linux 41 42# This test needs clusters with at least a refcount of 2 so that 43# OFLAG_COPIED is not set. refcount_bits=1 is therefore unsupported. 44_unsupported_imgopts 'refcount_bits=1[^0-9]' 45 46echo 47echo '=== Simulating an I/O error during snapshot deletion ===' 48echo 49 50_make_test_img 64M 51$QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io 52 53# Create the snapshot 54$QEMU_IMG snapshot -c foo "$TEST_IMG" 55 56# Verify the snapshot is there 57echo 58_img_info | grep 'Snapshot list' 59echo '(Snapshot filtered)' 60echo 61 62# Try to delete the snapshot (with an error happening when freeing the 63# then leaked clusters) 64cat > "$TEST_DIR/blkdebug.conf" <<EOF 65[inject-error] 66event = "cluster_free" 67errno = "5" 68EOF 69$QEMU_IMG snapshot -d foo "blkdebug:$TEST_DIR/blkdebug.conf:$TEST_IMG" 70 71# Verify the snapshot is gone 72echo 73_img_info | grep 'Snapshot list' 74 75# Should only show leaks 76echo '--- Checking test image ---' 77_check_test_img 78 79echo 80 81# As there are only leaks, this should be able to fully repair the 82# image 83echo '--- Repairing test image ---' 84_check_test_img -r leaks 85 86 87# success, all done 88echo '*** done' 89rm -f $seq.full 90status=0 91