xref: /qemu/tests/qemu-iotests/110 (revision 27a4a30e) 
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 $seq"
26
27status=1	# failure is the default!
28
29_cleanup()
30{
31    _cleanup_test_img
32    _rm_test_img "$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.
70# (Filter out the json:{} filename so this test works with external data files)
71TEST_IMG="json:{
72    'driver': '$IMGFMT',
73    'file': {
74        'driver': 'blkdebug',
75        'image': {
76            'driver': 'file',
77            'filename': '$TEST_IMG'
78        },
79        'set-state': [
80            {
81                'event': 'read_aio',
82                'new_state': 42
83            }
84        ]
85    }
86}" _img_info | _filter_img_info | grep -v 'backing file format' \
87    | _filter_json_filename
88
89echo
90echo '=== Backing name is always relative to the backed image ==='
91echo
92
93# omit the image size; it should work anyway
94_make_test_img -b "$TEST_IMG_REL.base"
95
96echo
97echo '=== Nodes without a common directory ==='
98echo
99
100cp "$TEST_IMG" "$TEST_IMG.copy"
101
102# Should inform us that the actual path of the backing file cannot be determined
103TEST_IMG="json:{
104    'driver': '$IMGFMT',
105    'file': {
106        'driver': 'quorum',
107        'vote-threshold': 1,
108        'children': [
109            {
110                'driver': 'file',
111                'filename': '$TEST_IMG'
112            },
113            {
114                'driver': 'file',
115                'filename': '$TEST_IMG.copy'
116            }
117        ]
118    }
119}" _img_info | _filter_img_info | grep -v 'backing file format' \
120    | _filter_json_filename
121
122
123# success, all done
124echo '*** done'
125rm -f $seq.full
126status=0
127