blob: 2355d98c1d35941a51ba62ea416bf3dc7adf7cc1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
#!/bin/bash
#
# Test case for repairing qcow2 images which cannot be repaired using
# the on-disk refcount structures
#
# Copyright (C) 2014 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# creator
owner=mreitz@redhat.com
seq="$(basename $0)"
echo "QA output created by $seq"
here="$PWD"
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
# This tests qocw2-specific low-level functionality
_supported_fmt qcow2
_supported_proto file
_supported_os Linux
# This test directly modifies a refblock so it relies on refcount_bits being 16
_unsupported_imgopts 'refcount_bits=\([^1]\|.\([^6]\|$\)\)'
echo
echo '=== Repairing an image without any refcount table ==='
echo
_make_test_img 64M
# just write some data
$QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io
# refcount_table_offset
poke_file "$TEST_IMG" $((0x30)) "\x00\x00\x00\x00\x00\x00\x00\x00"
# refcount_table_clusters
poke_file "$TEST_IMG" $((0x38)) "\x00\x00\x00\x00"
_check_test_img -r all
$QEMU_IO -c 'read -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io
echo
echo '=== Repairing unreferenced data cluster in new refblock area ==='
echo
IMGOPTS='cluster_size=512' _make_test_img 64M
# Allocate the first 128 kB in the image (first refblock)
$QEMU_IO -c 'write 0 0x1b200' "$TEST_IMG" | _filter_qemu_io
# should be 131072 == 0x20000
stat -c '%s' "$TEST_IMG"
# Enter a cluster at 128 kB (0x20000)
# XXX: This should be the first free entry in the last L2 table, but we cannot
# be certain
poke_file "$TEST_IMG" $((0x1ccc8)) "\x80\x00\x00\x00\x00\x02\x00\x00"
# Fill the cluster
truncate -s $((0x20200)) "$TEST_IMG"
$QEMU_IO -c "open -o driver=raw $TEST_IMG" -c 'write -P 42 128k 512' \
| _filter_qemu_io
# The data should now appear at this guest offset
$QEMU_IO -c 'read -P 42 0x1b200 512' "$TEST_IMG" | _filter_qemu_io
# This cluster is unallocated; fix it
_check_test_img -r all
# This repair operation must have allocated a new refblock; and that refblock
# should not overlap with the unallocated data cluster. If it does, the data
# will be damaged, so check it.
$QEMU_IO -c 'read -P 42 0x1b200 512' "$TEST_IMG" | _filter_qemu_io
echo
echo '=== Repairing refblock beyond the image end ==='
echo
echo
echo '--- Otherwise clean ---'
echo
_make_test_img 64M
# Normally, qemu doesn't create empty refblocks, so we just have to do it by
# hand
# XXX: This should be the entry for the second refblock
poke_file "$TEST_IMG" $((0x10008)) "\x00\x00\x00\x00\x00\x10\x00\x00"
# Mark that refblock as used
# XXX: This should be the 17th entry (cluster 16) of the first
# refblock
poke_file "$TEST_IMG" $((0x20020)) "\x00\x01"
_check_test_img -r all
echo
echo '--- Refblock is unallocated ---'
echo
_make_test_img 64M
poke_file "$TEST_IMG" $((0x10008)) "\x00\x00\x00\x00\x00\x10\x00\x00"
_check_test_img -r all
echo
echo '--- Signed overflow after the refblock ---'
echo
_make_test_img 64M
poke_file "$TEST_IMG" $((0x10008)) "\x7f\xff\xff\xff\xff\xff\x00\x00"
_check_test_img -r all
echo
echo '--- Unsigned overflow after the refblock ---'
echo
_make_test_img 64M
poke_file "$TEST_IMG" $((0x10008)) "\xff\xff\xff\xff\xff\xff\x00\x00"
_check_test_img -r all
# success, all done
echo '*** done'
rm -f $seq.full
status=0
|
