xref: /qemu/tests/qemu-iotests/039 (revision 310b3fe9) 
1#!/usr/bin/env bash
2#
3# Test qcow2 lazy refcounts
4#
5# Copyright (C) 2012 Red Hat, Inc.
6# Copyright IBM, Corp. 2010
7#
8# Based on test 038.
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program.  If not, see <http://www.gnu.org/licenses/>.
22#
23
24# creator
25owner=stefanha@linux.vnet.ibm.com
26
27seq=`basename $0`
28echo "QA output created by $seq"
29
30status=1	# failure is the default!
31
32_cleanup()
33{
34	_cleanup_test_img
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_supported_fmt qcow2
43_supported_proto file
44_supported_os Linux
45_default_cache_mode "writethrough"
46_supported_cache_modes "writethrough"
47
48size=128M
49
50echo
51echo "== Checking that image is clean on shutdown =="
52
53IMGOPTS="compat=1.1,lazy_refcounts=on"
54_make_test_img $size
55
56$QEMU_IO -c "write -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
57
58# The dirty bit must not be set
59$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
60_check_test_img
61
62echo
63echo "== Creating a dirty image file =="
64
65IMGOPTS="compat=1.1,lazy_refcounts=on"
66_make_test_img $size
67
68$QEMU_IO -c "write -P 0x5a 0 512" \
69         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
70    | _filter_qemu_io
71
72# The dirty bit must be set
73$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
74_check_test_img
75
76echo
77echo "== Read-only access must still work =="
78
79$QEMU_IO -r -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
80
81# The dirty bit must be set
82$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
83
84echo
85echo "== Repairing the image file must succeed =="
86
87_check_test_img -r all
88
89# The dirty bit must not be set
90$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
91
92echo
93echo "== Data should still be accessible after repair =="
94
95$QEMU_IO -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
96
97echo
98echo "== Opening a dirty image read/write should repair it =="
99
100IMGOPTS="compat=1.1,lazy_refcounts=on"
101_make_test_img $size
102
103$QEMU_IO -c "write -P 0x5a 0 512" \
104         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
105    | _filter_qemu_io
106
107# The dirty bit must be set
108$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
109
110$QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
111
112# The dirty bit must not be set
113$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
114
115echo
116echo "== Creating an image file with lazy_refcounts=off =="
117
118IMGOPTS="compat=1.1,lazy_refcounts=off"
119_make_test_img $size
120
121$QEMU_IO -c "write -P 0x5a 0 512" \
122         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
123    | _filter_qemu_io
124
125# The dirty bit must not be set since lazy_refcounts=off
126$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
127_check_test_img
128
129echo
130echo "== Committing to a backing file with lazy_refcounts=on =="
131
132IMGOPTS="compat=1.1,lazy_refcounts=on"
133TEST_IMG="$TEST_IMG".base _make_test_img $size
134
135IMGOPTS="compat=1.1,lazy_refcounts=on,backing_file=$TEST_IMG.base"
136_make_test_img $size
137
138$QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
139$QEMU_IMG commit "$TEST_IMG"
140
141# The dirty bit must not be set
142$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
143$PYTHON qcow2.py "$TEST_IMG".base dump-header | grep incompatible_features
144
145_check_test_img
146TEST_IMG="$TEST_IMG".base _check_test_img
147
148echo
149echo "== Changing lazy_refcounts setting at runtime =="
150
151IMGOPTS="compat=1.1,lazy_refcounts=off"
152_make_test_img $size
153
154$QEMU_IO -c "reopen -o lazy-refcounts=on" \
155         -c "write -P 0x5a 0 512" \
156         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
157    | _filter_qemu_io
158
159# The dirty bit must be set
160$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
161_check_test_img
162
163IMGOPTS="compat=1.1,lazy_refcounts=on"
164_make_test_img $size
165
166$QEMU_IO -c "reopen -o lazy-refcounts=off" \
167         -c "write -P 0x5a 0 512" \
168         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
169    | _filter_qemu_io
170
171# The dirty bit must not be set
172$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
173_check_test_img
174
175
176# success, all done
177echo "*** done"
178rm -f $seq.full
179status=0
180
181