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#!/bin/bash
#
# Test COW from 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 $seq"
here=`pwd`
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
_supported_fmt qcow qcow2 vmdk qed
_supported_proto file
_supported_os Linux
_unsupported_imgopts "subformat=monolithicFlat" \
"subformat=twoGbMaxExtentFlat" \
"subformat=twoGbMaxExtentSparse"
CLUSTER_SIZE=4k
size=128M
echo
echo "== creating backing file for COW tests =="
TEST_IMG_SAVE="$TEST_IMG"
TEST_IMG="$TEST_IMG.base"
_make_test_img $size
function backing_io()
{
local offset=$1
local sectors=$2
local op=$3
local pattern=0
local cur_sec=0
for i in $(seq 0 $((sectors - 1))); do
cur_sec=$((offset / 512 + i))
pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 ))
echo "$op -P $pattern $((cur_sec * 512)) 512"
done
}
backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
TEST_IMG="$TEST_IMG_SAVE"
_make_test_img -b "$TEST_IMG.base" 6G
echo
echo "== COW in a single cluster =="
$QEMU_IO -c "write -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io
backing_io $((2 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io
backing_io $((8 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io
backing_io $((11 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
echo
echo "== COW in two-cluster allocations =="
$QEMU_IO -c "write -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io
backing_io $((22 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io
backing_io $((32 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io
backing_io $((38 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
echo
echo "== COW in multi-cluster allocations =="
$QEMU_IO -c "write -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "write -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io
backing_io $((63 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io
backing_io $((80 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c "read -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io
backing_io $((98 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
_check_test_img
# success, all done
echo "*** done"
rm -f $seq.full
status=0
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