1#!/usr/bin/env bash 2# group: rw auto backing 3# 4# Test that qemu-img info --backing-chain detects infinite loops 5# 6# Copyright (C) 2012 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=stefanha@redhat.com 24 25seq=`basename $0` 26echo "QA output created by $seq" 27 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33 for img in "$TEST_IMG".[123].base; do 34 _rm_test_img "$img" 35 done 36} 37trap "_cleanup; exit \$status" 0 1 2 3 15 38 39# get standard environment, filters and checks 40. ./common.rc 41. ./common.filter 42 43# Any format supporting backing files 44_supported_fmt qcow2 qed 45_supported_proto file 46 47 48size=128M 49_make_test_img $size 50$QEMU_IMG rebase -u -b "$TEST_IMG" -F $IMGFMT "$TEST_IMG" 51 52echo 53echo "== backing file references self ==" 54_img_info --backing-chain 55 56_make_test_img $size 57mv "$TEST_IMG" "$TEST_IMG.base" 58_make_test_img -b "$TEST_IMG.base" -F $IMGFMT $size 59$QEMU_IMG rebase -u -b "$TEST_IMG" -F $IMGFMT "$TEST_IMG.base" 60 61echo 62echo "== parent references self ==" 63_img_info --backing-chain 64 65_make_test_img $size 66mv "$TEST_IMG" "$TEST_IMG.1.base" 67_make_test_img -b "$TEST_IMG.1.base" -F $IMGFMT $size 68mv "$TEST_IMG" "$TEST_IMG.2.base" 69_make_test_img -b "$TEST_IMG.2.base" -F $IMGFMT $size 70mv "$TEST_IMG" "$TEST_IMG.3.base" 71_make_test_img -b "$TEST_IMG.3.base" -F $IMGFMT $size 72$QEMU_IMG rebase -u -b "$TEST_IMG.2.base" -F $IMGFMT "$TEST_IMG.1.base" 73 74echo 75echo "== ancestor references another ancestor ==" 76_img_info --backing-chain 77 78_make_test_img $size 79mv "$TEST_IMG" "$TEST_IMG.1.base" 80_make_test_img -b "$TEST_IMG.1.base" -F $IMGFMT $size 81mv "$TEST_IMG" "$TEST_IMG.2.base" 82_make_test_img -b "$TEST_IMG.2.base" -F $IMGFMT $size 83 84echo 85echo "== finite chain of length 3 (human) ==" 86# Exclude backing format, since qed differs from qcow2 on what gets stored 87_img_info --backing-chain | grep -v '^backing file format:' 88 89echo 90echo "== finite chain of length 3 (json) ==" 91_img_info --backing-chain --output=json | grep -v 'backing-filename-format' 92 93# success, all done 94echo "*** done" 95rm -f $seq.full 96status=0 97