xref: /qemu/tests/qemu-iotests/039 (revision 6402cbbb) 
1#!/bin/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
30here=`pwd`
31status=1	# failure is the default!
32
33_cleanup()
34{
35	_cleanup_test_img
36}
37trap "_cleanup; exit \$status" 0 1 2 3 15
38
39# get standard environment, filters and checks
40. ./common.rc
41. ./common.filter
42
43_supported_fmt qcow2
44_supported_proto file
45_supported_os Linux
46_default_cache_mode "writethrough"
47_supported_cache_modes "writethrough"
48
49size=128M
50
51echo
52echo "== Checking that image is clean on shutdown =="
53
54IMGOPTS="compat=1.1,lazy_refcounts=on"
55_make_test_img $size
56
57$QEMU_IO -c "write -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
58
59# The dirty bit must not be set
60$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
61_check_test_img
62
63echo
64echo "== Creating a dirty image file =="
65
66IMGOPTS="compat=1.1,lazy_refcounts=on"
67_make_test_img $size
68
69$QEMU_IO -c "write -P 0x5a 0 512" \
70         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
71    | _filter_qemu_io
72
73# The dirty bit must be set
74$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
75_check_test_img
76
77echo
78echo "== Read-only access must still work =="
79
80$QEMU_IO -r -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
81
82# The dirty bit must be set
83$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
84
85echo
86echo "== Repairing the image file must succeed =="
87
88_check_test_img -r all
89
90# The dirty bit must not be set
91$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
92
93echo
94echo "== Data should still be accessible after repair =="
95
96$QEMU_IO -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
97
98echo
99echo "== Opening a dirty image read/write should repair it =="
100
101IMGOPTS="compat=1.1,lazy_refcounts=on"
102_make_test_img $size
103
104$QEMU_IO -c "write -P 0x5a 0 512" \
105         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
106    | _filter_qemu_io
107
108# The dirty bit must be set
109$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
110
111$QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
112
113# The dirty bit must not be set
114$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
115
116echo
117echo "== Creating an image file with lazy_refcounts=off =="
118
119IMGOPTS="compat=1.1,lazy_refcounts=off"
120_make_test_img $size
121
122$QEMU_IO -c "write -P 0x5a 0 512" \
123         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
124    | _filter_qemu_io
125
126# The dirty bit must not be set since lazy_refcounts=off
127$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
128_check_test_img
129
130echo
131echo "== Committing to a backing file with lazy_refcounts=on =="
132
133IMGOPTS="compat=1.1,lazy_refcounts=on"
134TEST_IMG="$TEST_IMG".base _make_test_img $size
135
136IMGOPTS="compat=1.1,lazy_refcounts=on,backing_file=$TEST_IMG.base"
137_make_test_img $size
138
139$QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
140$QEMU_IMG commit "$TEST_IMG"
141
142# The dirty bit must not be set
143$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
144$PYTHON qcow2.py "$TEST_IMG".base dump-header | grep incompatible_features
145
146_check_test_img
147TEST_IMG="$TEST_IMG".base _check_test_img
148
149echo
150echo "== Changing lazy_refcounts setting at runtime =="
151
152IMGOPTS="compat=1.1,lazy_refcounts=off"
153_make_test_img $size
154
155$QEMU_IO -c "reopen -o lazy-refcounts=on" \
156         -c "write -P 0x5a 0 512" \
157         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
158    | _filter_qemu_io
159
160# The dirty bit must be set
161$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
162_check_test_img
163
164IMGOPTS="compat=1.1,lazy_refcounts=on"
165_make_test_img $size
166
167$QEMU_IO -c "reopen -o lazy-refcounts=off" \
168         -c "write -P 0x5a 0 512" \
169         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
170    | _filter_qemu_io
171
172# The dirty bit must not be set
173$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
174_check_test_img
175
176
177# success, all done
178echo "*** done"
179rm -f $seq.full
180status=0
181
182