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 # Variant of 097, which includes snapshots and persistent bitmaps, to
8 # tickle the slow codepath in qcow2. See also 198, for another feature
9 # that tickles the slow codepath.
11 # Copyright (C) 2014, 2017 Red Hat, Inc.
13 # This program is free software; you can redistribute it and/or modify
14 # it under the terms of the GNU General Public License as published by
15 # the Free Software Foundation; either version 2 of the License, or
16 # (at your option) any later version.
18 # This program is distributed in the hope that it will be useful,
19 # but WITHOUT ANY WARRANTY; without even the implied warranty of
20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 # GNU General Public License for more details.
23 # You should have received a copy of the GNU General Public License
24 # along with this program. If not, see <http://www.gnu.org/licenses/>.
28 owner=hreitz@redhat.com
31 echo "QA output created by $seq"
33 status=1 # failure is the default!
38 _rm_test_img "$TEST_IMG.itmd"
40 trap "_cleanup; exit \$status" 0 1 2 3 15
42 # get standard environment, filters and checks
47 # This test is specific to qcow2
49 _supported_proto file fuse
51 # Persistent dirty bitmaps require compat=1.1;
52 # Internal snapshots forbid using an external data file
53 # (they work with refcount_bits=1 here, though, because there actually
54 # is no data when creating the snapshot)
55 _unsupported_imgopts 'compat=0.10' data_file
59 $QEMU -nographic -qmp stdio -serial none "$@" 2>&1 \
60 | _filter_testdir | _filter_qmp | _filter_qemu \
61 | sed 's/"sha256": ".\{64\}"/"sha256": HASH/'
64 for reason in snapshot bitmap; do
67 # 0: Two-layer backing chain, commit to upper backing file (implicitly)
68 # (in this case, the top image will be emptied)
69 # 1: Two-layer backing chain, commit to upper backing file (explicitly)
70 # (in this case, the top image will implicitly stay unchanged)
71 # 2: Two-layer backing chain, commit to upper backing file (implicitly with -d)
72 # (in this case, the top image will explicitly stay unchanged)
73 # 3: Two-layer backing chain, commit to lower backing file
74 # (in this case, the top image will implicitly stay unchanged)
76 # 020 already tests committing, so this only tests whether image chains are
77 # working properly and that all images above the base are emptied; therefore,
78 # no complicated patterns are necessary. Check near the 2G mark, as qcow2
79 # has been buggy at that boundary in the past.
83 echo "=== Test pass $reason.$i ==="
86 len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned
87 TEST_IMG="$TEST_IMG.base" _make_test_img $len
88 TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $len
89 _make_test_img -b "$TEST_IMG.itmd" -F $IMGFMT $len
90 # Update the top image to use a feature that is incompatible with fast path
92 snapshot) $QEMU_IMG snapshot -c snap "$TEST_IMG" ;;
95 { "execute": "qmp_capabilities" }
96 { "execute": "blockdev-add",
97 "arguments": { "driver": "qcow2", "node-name": "drive0",
98 "file": { "driver": "file", "filename": "$TEST_IMG" } } }
99 { "execute": "block-dirty-bitmap-add",
100 "arguments": { "node": "drive0", "name": "bitmap0",
101 "persistent": true } }
102 { "execute": "quit" }
107 $QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io
108 $QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io
109 $QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io
110 $QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io
112 if [ $i -lt 3 ]; then
114 # -b "$TEST_IMG.itmd" should be the default (that is, committing to the
115 # first backing file in the chain)
116 $QEMU_IMG commit "$TEST_IMG"
117 elif [ $i == 1 ]; then
118 # explicitly specify the commit target (this should imply -d)
119 $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG"
121 # do not explicitly specify the commit target, but use -d to leave the
122 # top image unchanged
123 $QEMU_IMG commit -d "$TEST_IMG"
126 # Bottom should be unchanged
127 $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io
128 $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
130 # Intermediate should contain changes from top
131 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
132 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
133 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
134 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io
136 # And in pass 0, the top image should be empty, whereas in both other passes
137 # it should be unchanged (which is both checked by qemu-img map)
139 $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG"
141 # Bottom should contain all changes
142 $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io
143 $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io
144 $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io
145 $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
147 # Both top and intermediate should be unchanged
150 $QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map
151 $QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map
152 $QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map
154 # Check that the reason for slow path is still present, as appropriate
157 $QEMU_IMG snapshot -l "$TEST_IMG" |
158 sed 's/^\(.\{20\}\).*/\1/; s/ *$//' ;;
161 { "execute": "qmp_capabilities" }
162 { "execute": "blockdev-add",
163 "arguments": { "driver": "qcow2", "node-name": "drive0",
164 "file": { "driver": "file", "filename": "$TEST_IMG" } } }
165 { "execute": "x-debug-block-dirty-bitmap-sha256",
166 "arguments": { "node": "drive0", "name": "bitmap0" } }
167 { "execute": "quit" }