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 $seq"
27 status
=1 # failure is the default!
32 rm -f "$TEST_IMG.base"
33 rm -f "$TEST_IMG.orig"
35 trap "_cleanup; exit \$status" 0 1 2 3 15
37 # get standard environment, filters and checks
42 # Any format supporting backing files
43 _supported_fmt qcow qcow2 vmdk qed
45 _unsupported_imgopts
"subformat=monolithicFlat" \
46 "subformat=twoGbMaxExtentFlat" \
47 "subformat=twoGbMaxExtentSparse"
49 TEST_OFFSETS
="0 4294967296"
51 TEST_IMG_SAVE
="$TEST_IMG"
52 TEST_IMG
="$TEST_IMG.base"
56 echo "Filling base image"
59 for offset
in $TEST_OFFSETS; do
60 # Some clusters with alternating backing file/image file reads
61 io writev $
(( offset
)) 512 1024 64
63 # Complete backing clusters
64 io writev $
(( offset
+ 64 * 1024)) 65536 65536 1
68 echo "Creating test image with backing file"
71 TEST_IMG
="$TEST_IMG_SAVE"
72 _make_test_img
-b "$TEST_IMG.base" 6G
74 echo "Filling test image"
77 for offset
in $TEST_OFFSETS; do
78 # Some clusters with alternating backing file/image file reads
79 io writev $
(( offset
+ 512 )) 512 1024 64
81 # Complete test image clusters
82 io writev $
(( offset
+ 64 * 1024 + 65536)) 65536 65536 1
86 $QEMU_IMG commit
"$TEST_IMG"
87 TEST_IMG
="$TEST_IMG.base"
89 echo "Reading from the backing file"
92 for offset
in $TEST_OFFSETS; do
93 # Some clusters with alternating backing file/image file reads
94 io readv $
(( offset
)) 512 1024 64
95 io readv $
(( offset
+ 512 )) 512 1024 64
97 # Complete test image clusters
98 io readv $
(( offset
+ 64 * 1024)) 65536 65536 1
99 io readv $
(( offset
+ 64 * 1024 + 65536)) 65536 65536 1
102 io_zero readv $
(( offset
+ 64 * 1024 + 65536 * 4 )) 65536 65536 1
106 TEST_IMG
=$TEST_IMG_SAVE
109 echo 'Testing failing commit'
112 TEST_IMG
="$TEST_IMG.base" _make_test_img
1M
114 # Create an image with a null backing file to which committing will fail (with
115 # ENOSPC so we can distinguish the result from some generic EIO which may be
116 # generated anywhere in the block layer)
117 _make_test_img
-b "json:{'driver': '$IMGFMT',
119 'driver': 'blkdebug',
121 'event': 'write_aio',
127 'filename': '$TEST_IMG.base'
130 # Just write anything so committing will not be a no-op
131 $QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io
133 $QEMU_IMG commit
"$TEST_IMG"