xref: /qemu/tests/qemu-iotests/039 (revision bfa3ab61) 
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`
31tmp=/tmp/$$
32status=1	# failure is the default!
33
34_cleanup()
35{
36	_cleanup_test_img
37}
38trap "_cleanup; exit \$status" 0 1 2 3 15
39
40# get standard environment, filters and checks
41. ./common.rc
42. ./common.filter
43
44_supported_fmt qcow2
45_supported_proto file
46_supported_os Linux
47_default_cache_mode "writethrough"
48_supported_cache_modes "writethrough"
49
50_subshell_exec()
51{
52    # Executing crashing commands in a subshell prevents information like the
53    # "Killed" line from being lost
54    (exec "$@")
55}
56
57size=128M
58
59echo
60echo "== Checking that image is clean on shutdown =="
61
62IMGOPTS="compat=1.1,lazy_refcounts=on"
63_make_test_img $size
64
65$QEMU_IO -c "write -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
66
67# The dirty bit must not be set
68$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
69_check_test_img
70
71echo
72echo "== Creating a dirty image file =="
73
74IMGOPTS="compat=1.1,lazy_refcounts=on"
75_make_test_img $size
76
77_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
78                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
79    | _filter_qemu_io
80
81# The dirty bit must be set
82$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
83_check_test_img
84
85echo
86echo "== Read-only access must still work =="
87
88$QEMU_IO -r -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
89
90# The dirty bit must be set
91$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
92
93echo
94echo "== Repairing the image file must succeed =="
95
96_check_test_img -r all
97
98# The dirty bit must not be set
99$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
100
101echo
102echo "== Data should still be accessible after repair =="
103
104$QEMU_IO -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io
105
106echo
107echo "== Opening a dirty image read/write should repair it =="
108
109IMGOPTS="compat=1.1,lazy_refcounts=on"
110_make_test_img $size
111
112_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
113                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
114    | _filter_qemu_io
115
116# The dirty bit must be set
117$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
118
119$QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
120
121# The dirty bit must not be set
122$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
123
124echo
125echo "== Creating an image file with lazy_refcounts=off =="
126
127IMGOPTS="compat=1.1,lazy_refcounts=off"
128_make_test_img $size
129
130_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
131                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
132    | _filter_qemu_io
133
134# The dirty bit must not be set since lazy_refcounts=off
135$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
136_check_test_img
137
138echo
139echo "== Committing to a backing file with lazy_refcounts=on =="
140
141IMGOPTS="compat=1.1,lazy_refcounts=on"
142TEST_IMG="$TEST_IMG".base _make_test_img $size
143
144IMGOPTS="compat=1.1,lazy_refcounts=on,backing_file=$TEST_IMG.base"
145_make_test_img $size
146
147$QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io
148$QEMU_IMG commit "$TEST_IMG"
149
150# The dirty bit must not be set
151$PYTHON qcow2.py "$TEST_IMG" dump-header | grep incompatible_features
152$PYTHON qcow2.py "$TEST_IMG".base dump-header | grep incompatible_features
153
154_check_test_img
155TEST_IMG="$TEST_IMG".base _check_test_img
156
157
158# success, all done
159echo "*** done"
160rm -f $seq.full
161status=0
162
163