1#!/usr/bin/env bash 2# group: rw quick 3# 4# Test case for internal snapshots in qcow2 5# 6# Copyright (C) 2023 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# 21 22# creator 23owner=kwolf@redhat.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# This tests qcow2-specific low-level functionality 41_supported_fmt qcow2 42_supported_proto generic 43# Internal snapshots are (currently) impossible with refcount_bits=1, 44# and generally impossible with external data files 45_unsupported_imgopts 'compat=0.10' 'refcount_bits=1[^0-9]' data_file 46 47IMG_SIZE=64M 48 49_qemu() 50{ 51 $QEMU -no-shutdown -nographic -monitor stdio -serial none \ 52 -blockdev file,filename="$TEST_IMG",node-name=disk0-file \ 53 -blockdev "$IMGFMT",file=disk0-file,node-name=disk0 \ 54 -object iothread,id=iothread0 \ 55 -device virtio-scsi,iothread=iothread0 \ 56 -device scsi-hd,drive=disk0,share-rw=on \ 57 "$@" 2>&1 |\ 58 _filter_qemu | _filter_hmp | _filter_qemu_io 59} 60 61_make_test_img $IMG_SIZE 62 63echo 64echo "=== Write some data, take a snapshot and overwrite part of it ===" 65echo 66 67{ 68 echo 'qemu-io disk0 "write -P0x11 0 1M"' 69 # Give qemu some time to boot before saving the VM state 70 sleep 0.5 71 echo "savevm snap0" 72 echo 'qemu-io disk0 "write -P0x22 0 512k"' 73 echo "quit" 74} | _qemu 75 76echo 77$QEMU_IMG snapshot -l "$TEST_IMG" | _filter_date | _filter_vmstate_size 78_check_test_img 79 80echo 81echo "=== Verify that loading the snapshot reverts to the old content ===" 82echo 83 84{ 85 # -loadvm reverted the write from the previous QEMU instance 86 echo 'qemu-io disk0 "read -P0x11 0 1M"' 87 88 # Verify that it works without restarting QEMU, too 89 echo 'qemu-io disk0 "write -P0x33 512k 512k"' 90 echo "loadvm snap0" 91 echo 'qemu-io disk0 "read -P0x11 0 1M"' 92 93 # Verify COW by writing a partial cluster 94 echo 'qemu-io disk0 "write -P0x33 63k 2k"' 95 echo 'qemu-io disk0 "read -P0x11 0 63k"' 96 echo 'qemu-io disk0 "read -P0x33 63k 2k"' 97 echo 'qemu-io disk0 "read -P0x11 65k 63k"' 98 99 # Take a second snapshot 100 echo "savevm snap1" 101 102 echo "quit" 103} | _qemu -loadvm snap0 104 105echo 106$QEMU_IMG snapshot -l "$TEST_IMG" | _filter_date | _filter_vmstate_size 107_check_test_img 108 109echo 110echo "=== qemu-img snapshot can revert to snapshots ===" 111echo 112 113$QEMU_IMG snapshot -a snap0 "$TEST_IMG" 114$QEMU_IO -c "read -P0x11 0 1M" "$TEST_IMG" | _filter_qemu_io 115$QEMU_IMG snapshot -a snap1 "$TEST_IMG" 116$QEMU_IO \ 117 -c "read -P0x11 0 63k" \ 118 -c "read -P0x33 63k 2k" \ 119 -c "read -P0x11 65k 63k" \ 120 "$TEST_IMG" | _filter_qemu_io 121 122echo 123echo "=== Deleting snapshots ===" 124echo 125{ 126 # The active layer stays unaffected by deleting the snapshot 127 echo "delvm snap1" 128 echo 'qemu-io disk0 "read -P0x11 0 63k"' 129 echo 'qemu-io disk0 "read -P0x33 63k 2k"' 130 echo 'qemu-io disk0 "read -P0x11 65k 63k"' 131 132 echo "quit" 133} | _qemu 134 135 136echo 137$QEMU_IMG snapshot -l "$TEST_IMG" | _filter_date | _filter_vmstate_size 138_check_test_img 139 140echo 141echo "=== Error cases ===" 142echo 143 144# snap1 should not exist any more 145_qemu -loadvm snap1 146 147echo 148{ 149 echo "loadvm snap1" 150 echo "quit" 151} | _qemu 152 153# Snapshot operations and inactive images are incompatible 154echo 155_qemu -loadvm snap0 -incoming defer 156{ 157 echo "loadvm snap0" 158 echo "delvm snap0" 159 echo "savevm snap1" 160 echo "quit" 161} | _qemu -incoming defer 162 163# -loadvm and -preconfig are incompatible 164echo 165_qemu -loadvm snap0 -preconfig 166 167# success, all done 168echo "*** done" 169rm -f $seq.full 170status=0 171