xref: /openbmc/qemu/tests/qemu-iotests/024 (revision 139c1837)
1#!/usr/bin/env bash
2#
3# Rebasing COW images
4#
5# Copyright (C) 2009 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
22owner=kwolf@redhat.com
23
24seq=`basename $0`
25echo "QA output created by $seq"
26
27status=1	# failure is the default!
28
29_cleanup()
30{
31    _cleanup_test_img
32    _rm_test_img "$TEST_DIR/t.$IMGFMT.base_old"
33    _rm_test_img "$TEST_DIR/t.$IMGFMT.base_new"
34
35    _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT"
36    _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base_old"
37    _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base_new"
38    rmdir "$TEST_DIR/subdir" 2> /dev/null
39}
40trap "_cleanup; exit \$status" 0 1 2 3 15
41
42# get standard environment, filters and checks
43. ./common.rc
44. ./common.filter
45. ./common.pattern
46
47# Currently only qcow2 and qed support rebasing
48_supported_fmt qcow2 qed
49_supported_proto file
50_supported_os Linux
51
52CLUSTER_SIZE=65536
53
54# Cluster allocations to be tested:
55#
56# Backing (old) 11  --  11  --  11  --  11  --
57# Backing (new) 22  22  --  --  22  22  --  --
58# COW image     33  33  33  33  --  --  --  --
59#
60# The pattern is written twice to have both an alloc -> non-alloc and a
61# non-alloc -> alloc transition in the COW image.
62
63echo "Creating backing file"
64echo
65
66TEST_IMG_SAVE="$TEST_IMG"
67TEST_IMG="$TEST_IMG.base_old"
68
69_make_test_img 1G
70io_pattern writev 0 $CLUSTER_SIZE $((2 * CLUSTER_SIZE)) 8 0x11
71
72TEST_IMG="$TEST_IMG_SAVE.base_new"
73
74echo "Creating new backing file"
75echo
76
77_make_test_img 1G
78io_pattern writev 0 $((2 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 4 0x22
79
80
81TEST_IMG="$TEST_IMG_SAVE"
82
83echo "Creating COW image"
84echo
85
86_make_test_img -b "$TEST_IMG.base_old" -F $IMGFMT 1G
87io_pattern writev 0 $((4 * CLUSTER_SIZE)) 0 1 0x33
88io_pattern writev $((8 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 0 1 0x33
89
90echo "Read before the rebase to make sure everything is set up correctly"
91echo
92io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
93io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
94io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
95io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
96io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
97io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
98io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
99io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
100io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
101io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
102io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
103io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
104io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
105io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
106io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
107io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
108
109echo
110echo Rebase and test again
111echo
112$QEMU_IMG rebase -b "$TEST_IMG.base_new" -F $IMGFMT "$TEST_IMG"
113io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
114io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
115io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
116io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
117io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
118io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
119io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
120io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
121io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
122io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
123io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
124io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
125io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
126io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
127io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
128io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
129
130echo
131echo "=== Test rebase in a subdirectory of the working directory ==="
132echo
133
134# Clean up the old images beforehand so they do not interfere with
135# this test
136_cleanup
137
138mkdir "$TEST_DIR/subdir"
139
140# Relative to the overlay
141BASE_OLD_OREL="t.$IMGFMT.base_old"
142BASE_NEW_OREL="t.$IMGFMT.base_new"
143
144# Relative to $TEST_DIR (which is going to be our working directory)
145OVERLAY_WREL="subdir/t.$IMGFMT"
146
147BASE_OLD="$TEST_DIR/subdir/$BASE_OLD_OREL"
148BASE_NEW="$TEST_DIR/subdir/$BASE_NEW_OREL"
149OVERLAY="$TEST_DIR/$OVERLAY_WREL"
150
151# Test done here:
152#
153# Backing (old): 11 11 -- 11
154# Backing (new): -- 22 22 11
155# Overlay:       -- -- -- --
156#
157# Rebasing works, we have verified that above.  Here, we just want to
158# see that rebasing is done for the correct target backing file.
159
160TEST_IMG=$BASE_OLD _make_test_img 1M
161TEST_IMG=$BASE_NEW _make_test_img 1M
162TEST_IMG=$OVERLAY _make_test_img -b "$BASE_OLD_OREL" -F $IMGFMT 1M
163
164echo
165
166$QEMU_IO "$BASE_OLD" \
167    -c "write -P 0x11 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
168    -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \
169    | _filter_qemu_io
170
171$QEMU_IO "$BASE_NEW" \
172    -c "write -P 0x22 $((1 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
173    -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \
174    | _filter_qemu_io
175
176echo
177
178pushd "$TEST_DIR" >/dev/null
179$QEMU_IMG rebase -f "$IMGFMT" -b "$BASE_NEW_OREL" -F $IMGFMT "$OVERLAY_WREL"
180popd >/dev/null
181
182# Verify the backing path is correct
183TEST_IMG=$OVERLAY _img_info | grep '^backing file:'
184
185echo
186
187# Verify the data is correct
188$QEMU_IO "$OVERLAY" \
189    -c "read -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
190    -c "read -P 0x11 $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
191    -c "read -P 0x00 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
192    -c "read -P 0x11 $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
193    | _filter_qemu_io
194
195echo
196
197# Verify that cluster #3 is not allocated (because it is the same in
198# $BASE_OLD and $BASE_NEW)
199$QEMU_IMG map "$OVERLAY" | _filter_qemu_img_map
200
201
202# success, all done
203echo "*** done"
204rm -f $seq.full
205status=0
206