3 # Commit changes to backing file
5 # Copyright (C) 2009 Red Hat, Inc.
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.
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.
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/>.
22 owner
=kwolf@redhat.com
25 echo "QA output created by $seq"
27 status
=1 # failure is the default!
32 _rm_test_img
"$TEST_IMG.base"
33 _rm_test_img
"$TEST_IMG.orig"
35 _rm_test_img
"$TEST_DIR/subdir/t.$IMGFMT.base"
36 _rm_test_img
"$TEST_DIR/subdir/t.$IMGFMT.mid"
37 _rm_test_img
"$TEST_DIR/subdir/t.$IMGFMT"
38 rmdir "$TEST_DIR/subdir" &> /dev
/null
40 trap "_cleanup; exit \$status" 0 1 2 3 15
42 # get standard environment, filters and checks
47 # Any format supporting backing files
48 _supported_fmt qcow qcow2 vmdk qed
50 _unsupported_imgopts
"subformat=monolithicFlat" \
51 "subformat=twoGbMaxExtentFlat" \
52 "subformat=twoGbMaxExtentSparse" \
53 "subformat=streamOptimized"
55 TEST_OFFSETS
="0 4294967296"
57 TEST_IMG_SAVE
="$TEST_IMG"
58 TEST_IMG
="$TEST_IMG.base"
62 echo "Filling base image"
65 for offset
in $TEST_OFFSETS; do
66 # Some clusters with alternating backing file/image file reads
67 io writev $
(( offset
)) 512 1024 64
69 # Complete backing clusters
70 io writev $
(( offset
+ 64 * 1024)) 65536 65536 1
74 echo "Creating test image with backing file"
77 TEST_IMG
="$TEST_IMG_SAVE"
78 _make_test_img
-b "$TEST_IMG.base" -F $IMGFMT 6G
80 echo "Filling test image"
83 for offset
in $TEST_OFFSETS; do
84 # Some clusters with alternating backing file/image file reads
85 io writev $
(( offset
+ 512 )) 512 1024 64
87 # Complete test image clusters
88 io writev $
(( offset
+ 64 * 1024 + 65536)) 65536 65536 1
92 $QEMU_IMG commit
"$TEST_IMG"
93 TEST_IMG
="$TEST_IMG.base"
95 echo "Reading from the backing file"
98 for offset
in $TEST_OFFSETS; do
99 # Some clusters with alternating backing file/image file reads
100 io readv $
(( offset
)) 512 1024 64
101 io readv $
(( offset
+ 512 )) 512 1024 64
103 # Complete test image clusters
104 io readv $
(( offset
+ 64 * 1024)) 65536 65536 1
105 io readv $
(( offset
+ 64 * 1024 + 65536)) 65536 65536 1
108 io_zero readv $
(( offset
+ 64 * 1024 + 65536 * 4 )) 65536 65536 1
112 TEST_IMG
=$TEST_IMG_SAVE
115 echo 'Testing failing commit'
118 TEST_IMG
="$TEST_IMG.base" _make_test_img
1M
120 # Create an image with a null backing file to which committing will fail (with
121 # ENOSPC so we can distinguish the result from some generic EIO which may be
122 # generated anywhere in the block layer)
123 backing
="json:{'driver': '$IMGFMT',
125 'driver': 'blkdebug',
127 'event': 'write_aio',
133 'filename': '$TEST_IMG.base'
136 # Filter out newlines and collapse spaces
137 backing
=$
(echo "$backing" |
tr -d '\n' |
tr -s ' ')
139 _make_test_img
-b "$backing" -F $IMGFMT
141 # Just write anything so committing will not be a no-op
142 $QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io
144 $QEMU_IMG commit
"$TEST_IMG"
149 echo 'Testing commit in sub-directory with relative filenames'
152 pushd "$TEST_DIR" > /dev
/null
156 TEST_IMG
="subdir/t.$IMGFMT.base" _make_test_img
1M
157 TEST_IMG
="subdir/t.$IMGFMT.mid" _make_test_img
-b "t.$IMGFMT.base" -F $IMGFMT
158 TEST_IMG
="subdir/t.$IMGFMT" _make_test_img
-b "t.$IMGFMT.mid" -F $IMGFMT
161 $QEMU_IMG commit
-b "t.$IMGFMT.mid" "subdir/t.$IMGFMT"
163 # Might theoretically work, but does not in practice (we have to
164 # decide between this and the above; and since we always represent
165 # backing file names as relative to the overlay, we go for the above)
166 $QEMU_IMG commit
-b "subdir/t.$IMGFMT.mid" "subdir/t.$IMGFMT" 2>&1 | \
169 # This should work as well
170 $QEMU_IMG commit
-b "$TEST_DIR/subdir/t.$IMGFMT.mid" "subdir/t.$IMGFMT"
174 # Now let's try with just absolute filenames
175 # (This will not work with external data files, though, because when
176 # using relative paths for those, qemu will always resolve them
177 # relative to its CWD. Therefore, it cannot find those data files now
178 # that we left $TEST_DIR.)
179 if _get_data_file
'' > /dev
/null
; then
180 echo 'Image committed.' # Skip test
182 $QEMU_IMG commit
-b "$TEST_DIR/subdir/t.$IMGFMT.mid" \
183 "$TEST_DIR/subdir/t.$IMGFMT"