1#!/usr/bin/env bash 2# 3# Test case for relative backing file names in complex BDS trees 4# 5# Copyright (C) 2014 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=mreitz@redhat.com 23 24seq="$(basename $0)" 25echo "QA output created by $seq" 26 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32 rm -f "$TEST_IMG.copy" 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# Any format supporting backing files 41_supported_fmt qed qcow qcow2 vmdk 42_supported_proto file 43_unsupported_imgopts "subformat=monolithicFlat" "subformat=twoGbMaxExtentFlat" \ 44 "subformat=twoGbMaxExtentSparse" 45 46TEST_IMG_REL=$(basename "$TEST_IMG") 47 48echo 49echo '=== Reconstructable filename ===' 50echo 51 52TEST_IMG="$TEST_IMG.base" _make_test_img 64M 53_make_test_img -b "$TEST_IMG_REL.base" 64M 54# qemu should be able to reconstruct the filename, so relative backing names 55# should work 56# (We have to filter the backing file format because vmdk always 57# reports it (as vmdk), whereas other image formats would do so only 58# with the backing_fmt creation option, which neither vmdk nor qcow 59# support) 60TEST_IMG="json:{'driver':'$IMGFMT','file':{'driver':'file','filename':'$TEST_IMG'}}" \ 61 _img_info | _filter_img_info | grep -v 'backing file format' 62 63echo 64echo '=== Non-reconstructable filename ===' 65echo 66 67# Across blkdebug without a config file, you cannot reconstruct filenames, so 68# qemu is incapable of knowing the directory of the top image from the filename 69# alone. However, using bdrv_dirname(), it should still work. 70TEST_IMG="json:{ 71 'driver': '$IMGFMT', 72 'file': { 73 'driver': 'blkdebug', 74 'image': { 75 'driver': 'file', 76 'filename': '$TEST_IMG' 77 }, 78 'set-state': [ 79 { 80 'event': 'read_aio', 81 'new_state': 42 82 } 83 ] 84 } 85}" _img_info | _filter_img_info | grep -v 'backing file format' 86 87echo 88echo '=== Backing name is always relative to the backed image ===' 89echo 90 91# omit the image size; it should work anyway 92_make_test_img -b "$TEST_IMG_REL.base" 93 94echo 95echo '=== Nodes without a common directory ===' 96echo 97 98cp "$TEST_IMG" "$TEST_IMG.copy" 99 100# Should inform us that the actual path of the backing file cannot be determined 101TEST_IMG="json:{ 102 'driver': '$IMGFMT', 103 'file': { 104 'driver': 'quorum', 105 'vote-threshold': 1, 106 'children': [ 107 { 108 'driver': 'file', 109 'filename': '$TEST_IMG' 110 }, 111 { 112 'driver': 'file', 113 'filename': '$TEST_IMG.copy' 114 } 115 ] 116 } 117}" _img_info | _filter_img_info | grep -v 'backing file format' 118 119 120# success, all done 121echo '*** done' 122rm -f $seq.full 123status=0 124