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#!/bin/bash
#
# Test COW from backing files with AIO
#
# 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 qcow2 qed
_supported_proto generic
_supported_os Linux
CLUSTER_SIZE=2M
size=128M
echo
echo "== creating backing file for COW tests =="
_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 / 65536 + i))
pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
echo "$op -P $pattern $((cur_sec * 64))k 64k"
done
}
backing_io 0 256 write | $QEMU_IO $TEST_IMG | _filter_qemu_io
mv $TEST_IMG $TEST_IMG.base
_make_test_img -b $TEST_IMG.base 6G
echo
echo "== Some concurrent requests touching the same cluster =="
function overlay_io()
{
# Start with a request touching two clusters
echo aio_write -P 0x80 2020k 80k
# Then add some requests all over the place
for i in $(seq 0 15; seq 17 31; seq 33 47); do
echo aio_write -P $((0x81 + i)) $((i * 128))k 64k
done
# Then backwards overwriting part of them
for i in $( (seq 0 15; seq 17 31; seq 33 47) | tac); do
echo aio_write -P $((0x81 + i)) $((i * 128 + 32))k 64k
done
# And finally crossing the next cluster boundary
echo aio_write -P 0x90 4080k 80k
}
overlay_io | $QEMU_IO $TEST_IMG | _filter_qemu_io |\
sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g'
echo
echo "== Verify image content =="
function verify_io()
{
echo read -P 31 2016k 4k
echo read -P 0x80 2020k 80k
echo read -P 32 2100k 12k
echo read -P 33 2112k 64k
echo read -P 63 4064k 16k
echo read -P 0x90 4080k 80k
echo read -P 65 4160k 64k
for i in $(seq 0 15; seq 17 31; seq 33 47); do
echo read -P $((0x81 + i)) $((i * 128))k 96k
done
for i in $(seq 0 14; seq 16 30; seq 32 47); do
local cur_sec=$(( i * 2 + 1 ))
local pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
echo read -P $pattern $((i * 128 + 96))k 32k
done
}
verify_io | $QEMU_IO $TEST_IMG | _filter_qemu_io
_check_test_img
# success, all done
echo "*** done"
rm -f $seq.full
status=0
|
