Archipelago » qemu

#!/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 file

_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' \

    -e 's/qemu-io> //g' | paste - - | sort | tr '\t' '\n'

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