1#!/usr/bin/env bash 2# 3# Test that qemu-img info --backing-chain detects infinite loops 4# 5# Copyright (C) 2012 Red Hat, Inc. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21# creator 22owner=stefanha@redhat.com 23 24seq=`basename $0` 25echo "QA output created by $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32 for img in "$TEST_IMG".[123].base; do 33 _rm_test_img "$img" 34 done 35} 36trap "_cleanup; exit \$status" 0 1 2 3 15 37 38# get standard environment, filters and checks 39. ./common.rc 40. ./common.filter 41 42# Any format supporting backing files 43_supported_fmt qcow2 qed 44_supported_proto file 45 46 47size=128M 48_make_test_img $size 49$QEMU_IMG rebase -u -b "$TEST_IMG" -F $IMGFMT "$TEST_IMG" 50 51echo 52echo "== backing file references self ==" 53_img_info --backing-chain 54 55_make_test_img $size 56mv "$TEST_IMG" "$TEST_IMG.base" 57_make_test_img -b "$TEST_IMG.base" -F $IMGFMT $size 58$QEMU_IMG rebase -u -b "$TEST_IMG" -F $IMGFMT "$TEST_IMG.base" 59 60echo 61echo "== parent references self ==" 62_img_info --backing-chain 63 64_make_test_img $size 65mv "$TEST_IMG" "$TEST_IMG.1.base" 66_make_test_img -b "$TEST_IMG.1.base" -F $IMGFMT $size 67mv "$TEST_IMG" "$TEST_IMG.2.base" 68_make_test_img -b "$TEST_IMG.2.base" -F $IMGFMT $size 69mv "$TEST_IMG" "$TEST_IMG.3.base" 70_make_test_img -b "$TEST_IMG.3.base" -F $IMGFMT $size 71$QEMU_IMG rebase -u -b "$TEST_IMG.2.base" -F $IMGFMT "$TEST_IMG.1.base" 72 73echo 74echo "== ancestor references another ancestor ==" 75_img_info --backing-chain 76 77_make_test_img $size 78mv "$TEST_IMG" "$TEST_IMG.1.base" 79_make_test_img -b "$TEST_IMG.1.base" -F $IMGFMT $size 80mv "$TEST_IMG" "$TEST_IMG.2.base" 81_make_test_img -b "$TEST_IMG.2.base" -F $IMGFMT $size 82 83echo 84echo "== finite chain of length 3 (human) ==" 85# Exclude backing format, since qed differs from qcow2 on what gets stored 86_img_info --backing-chain | grep -v '^backing file format:' 87 88echo 89echo "== finite chain of length 3 (json) ==" 90_img_info --backing-chain --output=json | grep -v 'backing-filename-format' 91 92# success, all done 93echo "*** done" 94rm -f $seq.full 95status=0 96