176 (6380B)
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