| 1 | #!/usr/bin/env bash |
| 2 | # group: rw auto backing |
| 3 | # |
| 4 | # Commit changes into backing chains and empty the top image if the |
| 5 | # backing image is not explicitly specified. |
| 6 | # |
| 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. |
| 10 | # |
| 11 | # Copyright (C) 2014, 2017 Red Hat, Inc. |
| 12 | # |
| 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. |
| 17 | # |
| 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. |
| 22 | # |
| 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/>. |
| 25 | # |
| 26 | |
| 27 | # creator |
| 28 | owner=hreitz@redhat.com |
| 29 | |
| 30 | seq="$(basename $0)" |
| 31 | echo "QA output created by $seq" |
| 32 | |
| 33 | status=1 # failure is the default! |
| 34 | |
| 35 | _cleanup() |
| 36 | { |
| 37 | _cleanup_test_img |
| 38 | _rm_test_img "$TEST_IMG.itmd" |
| 39 | } |
| 40 | trap "_cleanup; exit \$status" 0 1 2 3 15 |
| 41 | |
| 42 | # get standard environment, filters and checks |
| 43 | . ./common.rc |
| 44 | . ./common.filter |
| 45 | . ./common.pattern |
| 46 | |
| 47 | # This test is specific to qcow2 |
| 48 | _supported_fmt qcow2 |
| 49 | _supported_proto file fuse |
| 50 | _supported_os Linux |
| 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 |
| 56 | |
| 57 | run_qemu() |
| 58 | { |
| 59 | $QEMU -nographic -qmp stdio -serial none "$@" 2>&1 \ |
| 60 | | _filter_testdir | _filter_qmp | _filter_qemu \ |
| 61 | | sed 's/"sha256": ".\{64\}"/"sha256": HASH/' |
| 62 | } |
| 63 | |
| 64 | for reason in snapshot bitmap; do |
| 65 | |
| 66 | # Four passes: |
| 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) |
| 75 | # |
| 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. |
| 80 | for i in 0 1 2 3; do |
| 81 | |
| 82 | echo |
| 83 | echo "=== Test pass $reason.$i ===" |
| 84 | echo |
| 85 | |
| 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 |
| 91 | case $reason in |
| 92 | snapshot) $QEMU_IMG snapshot -c snap "$TEST_IMG" ;; |
| 93 | bitmap) |
| 94 | run_qemu <<EOF |
| 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" } |
| 103 | EOF |
| 104 | ;; |
| 105 | esac |
| 106 | |
| 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 |
| 111 | |
| 112 | if [ $i -lt 3 ]; then |
| 113 | if [ $i == 0 ]; then |
| 114 | # -b "$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" |
| 120 | else |
| 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" |
| 124 | fi |
| 125 | |
| 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 |
| 129 | |
| 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 |
| 135 | |
| 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) |
| 138 | else |
| 139 | $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG" |
| 140 | |
| 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 |
| 146 | |
| 147 | # Both top and intermediate should be unchanged |
| 148 | fi |
| 149 | |
| 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 |
| 153 | |
| 154 | # Check that the reason for slow path is still present, as appropriate |
| 155 | case $reason in |
| 156 | snapshot) |
| 157 | $QEMU_IMG snapshot -l "$TEST_IMG" | |
| 158 | sed 's/^\(.\{20\}\).*/\1/; s/ *$//' ;; |
| 159 | bitmap) |
| 160 | run_qemu <<EOF |
| 161 | { "execute": "qmp_capabilities" } |
| 162 | { "execute": "blockdev-add", |
| 163 | "arguments": { "driver": "qcow2", "node-name": "drive0", |
| 164 | "file": { "driver": "file", "filename": "$TEST_IMG" } } } |
| 165 | { "execute": "x-debug-block-dirty-bitmap-sha256", |
| 166 | "arguments": { "node": "drive0", "name": "bitmap0" } } |
| 167 | { "execute": "quit" } |
| 168 | EOF |
| 169 | ;; |
| 170 | esac |
| 171 | |
| 172 | done |
| 173 | done |
| 174 | |
| 175 | # success, all done |
| 176 | echo "*** done" |
| 177 | rm -f $seq.full |
| 178 | status=0 |