jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
iotests: Test qemu-img convert --salvage
This test converts a simple image to another, but blkdebug injects
block_status and read faults at some offsets. The resulting image
should be the same as the input image, except that sectors that could
not be read have to be 0.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190507203508.18026-7-mreitz@redhat.com
Tested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[mreitz: Dropped superfluous printf from _filter_offsets, as suggested
by Vladimir; disable test for VDI and IMGOPTSSYNTAX]
Signed-off-by: Max Reitz <mreitz@redhat.com>
+214
+170
tests/qemu-iotests/251
+170
tests/qemu-iotests/251
···
1
+
#!/usr/bin/env bash
2
+
#
3
+
# Test qemu-img convert --salvage
4
+
#
5
+
# Copyright (C) 2019 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
22
+
owner=mreitz@redhat.com
23
+
24
+
seq=$(basename $0)
25
+
echo "QA output created by $seq"
26
+
27
+
status=1 # failure is the default!
28
+
29
+
_cleanup()
30
+
{
31
+
_cleanup_test_img
32
+
}
33
+
trap "_cleanup; exit \$status" 0 1 2 3 15
34
+
35
+
# get standard environment, filters and checks
36
+
. ./common.rc
37
+
. ./common.filter
38
+
. ./common.qemu
39
+
40
+
_supported_fmt generic
41
+
_supported_proto file
42
+
_supported_os Linux
43
+
44
+
if [ "$IMGOPTSSYNTAX" = "true" ]; then
45
+
# We use json:{} filenames here, so we cannot work with additional options.
46
+
_unsupported_fmt $IMGFMT
47
+
else
48
+
# With VDI, the output is ordered differently. Just disable it.
49
+
_unsupported_fmt vdi
50
+
fi
51
+
52
+
53
+
TEST_IMG="$TEST_IMG.orig" _make_test_img 64M
54
+
55
+
$QEMU_IO -c 'write -P 42 0 64M' "$TEST_IMG.orig" | _filter_qemu_io
56
+
57
+
58
+
sector_size=512
59
+
60
+
# Offsets on which to fail block-status. Keep in ascending order so
61
+
# the indexing done by _filter_offsets will appear in ascending order
62
+
# in the output as well.
63
+
status_fail_offsets="$((16 * 1024 * 1024 + 8192))
64
+
$((33 * 1024 * 1024 + 512))"
65
+
66
+
# Offsets on which to fail reads. Keep in ascending order for the
67
+
# same reason.
68
+
# The second element is shared with $status_fail_offsets on purpose.
69
+
# Starting with the third element, we test what happens when a
70
+
# continuous range of sectors is inaccessible.
71
+
read_fail_offsets="$((32 * 1024 * 1024 - 65536))
72
+
$((33 * 1024 * 1024 + 512))
73
+
$(seq $((34 * 1024 * 1024)) $sector_size \
74
+
$((34 * 1024 * 1024 + 4096 - $sector_size)))"
75
+
76
+
77
+
# blkdebug must be above the format layer so it can intercept all
78
+
# block-status events
79
+
source_img="json:{'driver': 'blkdebug',
80
+
'image': {
81
+
'driver': '$IMGFMT',
82
+
'file': {
83
+
'driver': 'file',
84
+
'filename': '$TEST_IMG.orig'
85
+
}
86
+
},
87
+
'inject-error': ["
88
+
89
+
for ofs in $status_fail_offsets
90
+
do
91
+
source_img+="{ 'event': 'none',
92
+
'iotype': 'block-status',
93
+
'errno': 5,
94
+
'sector': $((ofs / sector_size)) },"
95
+
done
96
+
97
+
for ofs in $read_fail_offsets
98
+
do
99
+
source_img+="{ 'event': 'none',
100
+
'iotype': 'read',
101
+
'errno': 5,
102
+
'sector': $((ofs / sector_size)) },"
103
+
done
104
+
105
+
# Remove the trailing comma and terminate @inject-error and json:{}
106
+
source_img="${source_img%,} ] }"
107
+
108
+
109
+
echo
110
+
111
+
112
+
_filter_offsets() {
113
+
filters=
114
+
115
+
index=0
116
+
for ofs in $1
117
+
do
118
+
filters+=" -e s/$ofs/status_fail_offset_$index/"
119
+
index=$((index + 1))
120
+
done
121
+
122
+
index=0
123
+
for ofs in $2
124
+
do
125
+
filters+=" -e s/$ofs/read_fail_offset_$index/"
126
+
index=$((index + 1))
127
+
done
128
+
129
+
sed $filters
130
+
}
131
+
132
+
# While determining the number of allocated sectors in the input
133
+
# image, we should see one block status warning per element of
134
+
# $status_fail_offsets.
135
+
#
136
+
# Then, the image is read. Since the block status is queried in
137
+
# basically the same way, the same warnings as in the previous step
138
+
# should reappear. Interleaved with those we should see a read
139
+
# warning per element of $read_fail_offsets.
140
+
# Note that $read_fail_offsets and $status_fail_offsets share an
141
+
# element (read_fail_offset_1 == status_fail_offset_1), so
142
+
# "status_fail_offset_1" in the output is the same as
143
+
# "read_fail_offset_1".
144
+
$QEMU_IMG convert --salvage "$source_img" "$TEST_IMG" 2>&1 \
145
+
| _filter_offsets "$status_fail_offsets" "$read_fail_offsets"
146
+
147
+
echo
148
+
149
+
# The offsets where the block status could not be determined should
150
+
# have been treated as containing data and thus should be correct in
151
+
# the output image.
152
+
# The offsets where reading failed altogether should be 0. Make them
153
+
# 0 in the input image, too, so we can compare both images.
154
+
for ofs in $read_fail_offsets
155
+
do
156
+
$QEMU_IO -c "write -z $ofs $sector_size" "$TEST_IMG.orig" \
157
+
| _filter_qemu_io \
158
+
| _filter_offsets '' "$read_fail_offsets"
159
+
done
160
+
161
+
echo
162
+
163
+
# These should be equal now.
164
+
$QEMU_IMG compare "$TEST_IMG.orig" "$TEST_IMG"
165
+
166
+
167
+
# success, all done
168
+
echo "*** done"
169
+
rm -f $seq.full
170
+
status=0
+43
tests/qemu-iotests/251.out
+43
tests/qemu-iotests/251.out
···
1
+
QA output created by 251
2
+
Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
3
+
wrote 67108864/67108864 bytes at offset 0
4
+
64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
5
+
6
+
qemu-img: warning: error while reading block status at offset status_fail_offset_0: Input/output error
7
+
qemu-img: warning: error while reading block status at offset status_fail_offset_1: Input/output error
8
+
qemu-img: warning: error while reading block status at offset status_fail_offset_0: Input/output error
9
+
qemu-img: warning: error while reading offset read_fail_offset_0: Input/output error
10
+
qemu-img: warning: error while reading block status at offset status_fail_offset_1: Input/output error
11
+
qemu-img: warning: error while reading offset status_fail_offset_1: Input/output error
12
+
qemu-img: warning: error while reading offset read_fail_offset_2: Input/output error
13
+
qemu-img: warning: error while reading offset read_fail_offset_3: Input/output error
14
+
qemu-img: warning: error while reading offset read_fail_offset_4: Input/output error
15
+
qemu-img: warning: error while reading offset read_fail_offset_5: Input/output error
16
+
qemu-img: warning: error while reading offset read_fail_offset_6: Input/output error
17
+
qemu-img: warning: error while reading offset read_fail_offset_7: Input/output error
18
+
qemu-img: warning: error while reading offset read_fail_offset_8: Input/output error
19
+
qemu-img: warning: error while reading offset read_fail_offset_9: Input/output error
20
+
21
+
wrote 512/512 bytes at offset read_fail_offset_0
22
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
23
+
wrote 512/512 bytes at offset read_fail_offset_1
24
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
25
+
wrote 512/512 bytes at offset read_fail_offset_2
26
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
27
+
wrote 512/512 bytes at offset read_fail_offset_3
28
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
29
+
wrote 512/512 bytes at offset read_fail_offset_4
30
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
31
+
wrote 512/512 bytes at offset read_fail_offset_5
32
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
33
+
wrote 512/512 bytes at offset read_fail_offset_6
34
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
35
+
wrote 512/512 bytes at offset read_fail_offset_7
36
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
37
+
wrote 512/512 bytes at offset read_fail_offset_8
38
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
39
+
wrote 512/512 bytes at offset read_fail_offset_9
40
+
512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
41
+
42
+
Images are identical.
43
+
*** done