#!/bin/bash
#
# Resizing images
#
# Copyright (C) 2010 IBM, Corp.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# creator
owner=stefanha@linux.vnet.ibm.com

seq=`basename $0`
echo "QA output created by $seq"

here=`pwd`
status=1	# failure is the default!

_cleanup()
{
	_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common.rc
. ./common.filter
. ./common.pattern

_supported_fmt raw qcow2 qed luks
_supported_proto file sheepdog rbd nfs
_supported_os Linux

echo "=== Creating image"
echo
small_size=$((128 * 1024 * 1024))
big_size=$((384 * 1024 * 1024))
_make_test_img $small_size

echo
echo "=== Writing whole image"
io_pattern write 0 $small_size 0 1 0xc5
_check_test_img

echo
echo "=== Resizing image"
$QEMU_IO "$TEST_IMG" <<EOF | _filter_qemu_io
length
truncate $big_size
length
EOF
_check_test_img

# bdrv_truncate() doesn't zero the new space, so we need to do that explicitly.
# We still want to test automatic zeroing for other formats even though
# bdrv_truncate() doesn't guarantee it.
if [ "$IMGFMT" == "luks" ]; then
    $QEMU_IO -c "write -z $small_size $((big_size - small_size))" "$TEST_IMG" > /dev/null
fi

echo
echo "=== Verifying image size after reopen"
$QEMU_IO -c "length" "$TEST_IMG"

echo
echo "=== Verifying resized image"
io_pattern read 0 $small_size 0 1 0xc5
io_pattern read $small_size $(($big_size - $small_size)) 0 1 0

# success, all done
echo "*** done"
rm -f $seq.full
status=0