#!/bin/bash
#
# Test bdrv_write_zeroes with backing files
#
# Copyright (C) 2012 Red Hat, Inc.
#
# 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=kwolf@redhat.com

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

here=`pwd`
tmp=/tmp/$$
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

_supported_fmt qcow qcow2 vmdk qed
_supported_proto file
_supported_os Linux
_unsupported_imgopts "subformat=monolithicFlat" \
                     "subformat=twoGbMaxExtentFlat" \
                     "subformat=twoGbMaxExtentSparse"

CLUSTER_SIZE=4k
size=128M

echo
echo "== creating backing file for COW tests =="

_make_test_img $size
$QEMU_IO -c "write -P 0x55 0 1M" "$TEST_IMG" | _filter_qemu_io
mv "$TEST_IMG" "$TEST_IMG.base"

_make_test_img -b "$TEST_IMG.base" 6G

echo
echo "== zero write with backing file =="
$QEMU_IO -c "write -z 64k 192k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -z 513k 13k" "$TEST_IMG" | _filter_qemu_io

_check_test_img

echo
echo "== verifying patterns (3) =="
$QEMU_IO -c "read -P 0x55 0 64k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x0 64k 192k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x55 256k 257k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x0 513k 13k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x55 526k 498k" "$TEST_IMG" | _filter_qemu_io

echo
echo "== overwriting zero cluster =="
$QEMU_IO -c "write -P 0xa 60k 8k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0xb 64k 8k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0xc 76k 4k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0xd 252k 8k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0xe 248k 8k" "$TEST_IMG" | _filter_qemu_io

_check_test_img

echo
echo "== verifying patterns (4) =="
$QEMU_IO -c "read -P 0x55 0 60k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0xa 60k 4k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0xb 64k 8k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x0 72k 4k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0xc 76k 4k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x0 80k 168k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0xe 248k 8k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0xd 256k 4k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x55 260k 64k" "$TEST_IMG" | _filter_qemu_io

echo
echo "== re-zeroing overwritten area =="
$QEMU_IO -c "write -z 64k 192k" "$TEST_IMG" | _filter_qemu_io

_check_test_img

echo
echo "== verifying patterns (5) =="
$QEMU_IO -c "read -P 0x55 0 60k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0xa 60k 4k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x0 64k 192k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0xd 256k 4k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x55 260k 253k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x0 513k 13k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x55 526k 498k" "$TEST_IMG" | _filter_qemu_io

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