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1 #!/usr/bin/env bash 2 # group: rw auto quick 3 # 4 # Test resizing a qcow2 image with a backing file 5 # 6 # Copyright (C) 2020 Igalia, S.L. 7 # Author: Alberto Garcia <berto@igalia.com> 8 # 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. 13 # 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. 18 # 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/>. 21 # 22 23 # creator 24 owner=berto@igalia.com 25 26 seq=`basename $0` 27 echo "QA output created by $seq" 28 29 status=1 # failure is the default! 30 31 _cleanup() 32 { 33 _cleanup_test_img 34 } 35 trap "_cleanup; exit \$status" 0 1 2 3 15 36 37 # get standard environment, filters and checks 38 . ./common.rc 39 . ./common.filter 40 41 _supported_fmt qcow2 42 _supported_proto file fuse 43 _supported_os Linux 44 # We need qemu-img map to show the file where the data is allocated, 45 # but with an external data file, it will show that instead of the 46 # file we want to check. So just skip this test for external data 47 # files. 48 _unsupported_imgopts data_file 49 50 echo '### Create the backing image' 51 BACKING_IMG="$TEST_IMG.base" 52 TEST_IMG="$BACKING_IMG" _make_test_img 1M 53 54 echo '### Fill the backing image with data (0x11)' 55 $QEMU_IO -c 'write -P 0x11 0 1M' "$BACKING_IMG" | _filter_qemu_io 56 57 echo '### Create the top image' 58 _make_test_img -F "$IMGFMT" -b "$BACKING_IMG" 59 60 echo '### Fill the top image with data (0x22)' 61 $QEMU_IO -c 'write -P 0x22 0 1M' "$TEST_IMG" | _filter_qemu_io 62 63 # Both offsets are part of the same cluster. 64 echo '### Shrink the image to 520k' 65 $QEMU_IMG resize --shrink "$TEST_IMG" 520k 66 echo '### Grow the image to 567k' 67 $QEMU_IMG resize "$TEST_IMG" 567k 68 69 echo '### Check that the tail of the image reads as zeroes' 70 $QEMU_IO -c 'read -P 0x22 0 520k' "$TEST_IMG" | _filter_qemu_io 71 $QEMU_IO -c 'read -P 0x00 520k 47k' "$TEST_IMG" | _filter_qemu_io 72 73 echo '### Show output of qemu-img map' 74 $QEMU_IMG map "$TEST_IMG" | _filter_testdir 75 76 # success, all done 77 echo "*** done" 78 rm -f $seq.full 79 status=0