3 # Commit changes into backing chains and empty the top image if the
4 # backing image is not explicitly specified
6 # Copyright (C) 2014 Red Hat, Inc.
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 2 of the License, or
11 # (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
23 owner
=mreitz@redhat.com
26 echo "QA output created by $seq"
29 status
=1 # failure is the default!
34 _rm_test_img
"$TEST_IMG.itmd"
36 trap "_cleanup; exit \$status" 0 1 2 3 15
38 # get standard environment, filters and checks
43 # Any format supporting backing files and bdrv_make_empty
44 _supported_fmt qcow qcow2
50 # 0: Two-layer backing chain, commit to upper backing file (implicitly)
51 # (in this case, the top image will be emptied)
52 # 1: Two-layer backing chain, commit to upper backing file (explicitly)
53 # (in this case, the top image will implicitly stay unchanged)
54 # 2: Two-layer backing chain, commit to upper backing file (implicitly with -d)
55 # (in this case, the top image will explicitly stay unchanged)
56 # 3: Two-layer backing chain, commit to lower backing file
57 # (in this case, the top image will implicitly stay unchanged)
59 # Each pass is run twice, since qcow2 has different code paths for cleaning
60 # an image depending on whether it has a snapshot.
62 # 020 already tests committing, so this only tests whether image chains are
63 # working properly and that all images above the base are emptied; therefore,
64 # no complicated patterns are necessary. Check near the 2G mark, as qcow2
65 # has been buggy at that boundary in the past.
70 echo "=== Test pass $i.$j ==="
73 TEST_IMG
="$TEST_IMG.base" _make_test_img
2100M
74 TEST_IMG
="$TEST_IMG.itmd" _make_test_img
-b "$TEST_IMG.base" 2100M
75 _make_test_img
-b "$TEST_IMG.itmd" 2100M
77 $QEMU_IMG snapshot
-c snap
"$TEST_IMG"
80 $QEMU_IO -c 'write -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io
81 $QEMU_IO -c 'write -P 2 0x7ffe0000 128k' "$TEST_IMG.itmd" | _filter_qemu_io
82 $QEMU_IO -c 'write -P 3 0x7fff0000 64k' "$TEST_IMG" | _filter_qemu_io
86 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the
87 # first backing file in the chain)
88 $QEMU_IMG commit
"$TEST_IMG"
89 elif [ $i == 1 ]; then
90 # explicitly specify the commit target (this should imply -d)
91 $QEMU_IMG commit
-b "$TEST_IMG.itmd" "$TEST_IMG"
93 # do not explicitly specify the commit target, but use -d to leave the
95 $QEMU_IMG commit
-d "$TEST_IMG"
98 # Bottom should be unchanged
99 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io
101 # Intermediate should contain changes from top
102 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
103 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
104 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
106 # And in pass 0, the top image should be empty, whereas in both other passes
107 # it should be unchanged (which is both checked by qemu-img map)
109 $QEMU_IMG commit
-b "$TEST_IMG.base" "$TEST_IMG"
111 # Bottom should contain all changes
112 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io
113 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io
114 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io
116 # Both top and intermediate should be unchanged
119 $QEMU_IMG map
"$TEST_IMG.base" | _filter_qemu_img_map
120 $QEMU_IMG map
"$TEST_IMG.itmd" | _filter_qemu_img_map
121 $QEMU_IMG map
"$TEST_IMG" | _filter_qemu_img_map