2 # group: rw auto backing
4 # Commit changes into backing chains and empty the top image if the
5 # backing image is not explicitly specified
7 # Copyright (C) 2014 Red Hat, Inc.
9 # This program is free software; you can redistribute it and/or modify
10 # it under the terms of the GNU General Public License as published by
11 # the Free Software Foundation; either version 2 of the License, or
12 # (at your option) any later version.
14 # This program is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 # GNU General Public License for more details.
19 # You should have received a copy of the GNU General Public License
20 # along with this program. If not, see <http://www.gnu.org/licenses/>.
24 owner=hreitz@redhat.com
27 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
45 _supported_proto file fuse
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 # 020 already tests committing, so this only tests whether image chains are
60 # working properly and that all images above the base are emptied; therefore,
61 # no complicated patterns are necessary. Check near the 2G mark, as qcow2
62 # has been buggy at that boundary in the past.
66 echo "=== Test pass $i ==="
69 len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned
70 TEST_IMG="$TEST_IMG.base" _make_test_img $len
71 TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $len
72 _make_test_img -b "$TEST_IMG.itmd" -F $IMGFMT $len
74 $QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io
75 $QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io
76 $QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io
77 $QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io
81 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the
82 # first backing file in the chain)
83 $QEMU_IMG commit "$TEST_IMG"
84 elif [ $i == 1 ]; then
85 # explicitly specify the commit target (this should imply -d)
86 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG"
88 # do not explicitly specify the commit target, but use -d to leave the
90 $QEMU_IMG commit -d "$TEST_IMG"
93 # Bottom should be unchanged
94 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io
95 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
97 # Intermediate should contain changes from top
98 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
99 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
100 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
101 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io
103 # And in pass 0, the top image should be empty, whereas in both other passes
104 # it should be unchanged (which is both checked by qemu-img map)
106 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG"
108 # Bottom should contain all changes
109 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io
110 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io
111 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io
112 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
114 # Both top and intermediate should be unchanged
117 $QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map
118 $QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map
119 $QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map