xref: /openbmc/qemu/tests/qemu-iotests/110 (revision 49d755d0) 
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
45TEST_IMG_REL=$(basename "$TEST_IMG")
46
47echo
48echo '=== Reconstructable filename ==='
49echo
50
51TEST_IMG="$TEST_IMG.base" _make_test_img 64M
52_make_test_img -b "$TEST_IMG_REL.base" 64M
53# qemu should be able to reconstruct the filename, so relative backing names
54# should work
55# (We have to filter the backing file format because vmdk always
56# reports it (as vmdk), whereas other image formats would do so only
57# with the backing_fmt creation option, which neither vmdk nor qcow
58# support)
59TEST_IMG="json:{'driver':'$IMGFMT','file':{'driver':'file','filename':'$TEST_IMG'}}" \
60    _img_info | _filter_img_info | grep -v 'backing file format'
61
62echo
63echo '=== Non-reconstructable filename ==='
64echo
65
66# Across blkdebug without a config file, you cannot reconstruct filenames, so
67# qemu is incapable of knowing the directory of the top image from the filename
68# alone. However, using bdrv_dirname(), it should still work.
69TEST_IMG="json:{
70    'driver': '$IMGFMT',
71    'file': {
72        'driver': 'blkdebug',
73        'image': {
74            'driver': 'file',
75            'filename': '$TEST_IMG'
76        },
77        'set-state': [
78            {
79                'event': 'read_aio',
80                'new_state': 42
81            }
82        ]
83    }
84}" _img_info | _filter_img_info | grep -v 'backing file format'
85
86echo
87echo '=== Backing name is always relative to the backed image ==='
88echo
89
90# omit the image size; it should work anyway
91_make_test_img -b "$TEST_IMG_REL.base"
92
93echo
94echo '=== Nodes without a common directory ==='
95echo
96
97cp "$TEST_IMG" "$TEST_IMG.copy"
98
99# Should inform us that the actual path of the backing file cannot be determined
100TEST_IMG="json:{
101    'driver': '$IMGFMT',
102    'file': {
103        'driver': 'quorum',
104        'vote-threshold': 1,
105        'children': [
106            {
107                'driver': 'file',
108                'filename': '$TEST_IMG'
109            },
110            {
111                'driver': 'file',
112                'filename': '$TEST_IMG.copy'
113            }
114        ]
115    }
116}" _img_info | _filter_img_info | grep -v 'backing file format'
117
118
119# success, all done
120echo '*** done'
121rm -f $seq.full
122status=0
123