qemu/tests/qemu-iotests/292
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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
  24owner=berto@igalia.com
  25
  26seq=`basename $0`
  27echo "QA output created by $seq"
  28
  29status=1    # failure is the default!
  30
  31_cleanup()
  32{
  33    _cleanup_test_img
  34}
  35trap "_cleanup; exit \$status" 0 1 2 3 15
  36
  37# get standard environment, filters and checks
  38. ./common.rc
  39. ./common.filter
  40
  41_supported_fmt qcow2
  42_supported_proto file fuse
  43_supported_os Linux
  44# We need qemu-img map to show the file where the data is allocated,
  45# but with an external data file, it will show that instead of the
  46# file we want to check.  So just skip this test for external data
  47# files.
  48_unsupported_imgopts data_file
  49
  50echo '### Create the backing image'
  51BACKING_IMG="$TEST_IMG.base"
  52TEST_IMG="$BACKING_IMG" _make_test_img 1M
  53
  54echo '### Fill the backing image with data (0x11)'
  55$QEMU_IO -c 'write -P 0x11 0 1M' "$BACKING_IMG" | _filter_qemu_io
  56
  57echo '### Create the top image'
  58_make_test_img -F "$IMGFMT" -b "$BACKING_IMG"
  59
  60echo '### Fill the top image with data (0x22)'
  61$QEMU_IO -c 'write -P 0x22 0 1M' "$TEST_IMG" | _filter_qemu_io
  62
  63# Both offsets are part of the same cluster.
  64echo '### Shrink the image to 520k'
  65$QEMU_IMG resize --shrink "$TEST_IMG" 520k
  66echo '### Grow the image to 567k'
  67$QEMU_IMG resize "$TEST_IMG" 567k
  68
  69echo '### Check that the tail of the image reads as zeroes'
  70$QEMU_IO -c 'read -P 0x22    0 520k' "$TEST_IMG" | _filter_qemu_io
  71$QEMU_IO -c 'read -P 0x00 520k  47k' "$TEST_IMG" | _filter_qemu_io
  72
  73echo '### Show output of qemu-img map'
  74$QEMU_IMG map "$TEST_IMG" | _filter_testdir
  75
  76# success, all done
  77echo "*** done"
  78rm -f $seq.full
  79status=0
  80