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#!/bin/bash
#
# Test concurrent cluster allocations
#
# 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
_supported_proto generic
_supported_os Linux
CLUSTER_SIZE=64k
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 16 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()
{
# Allocate middle of cluster 1, then write to somewhere before and after it
cat <<EOF
break write_aio A
aio_write -P 10 0x18000 0x2000
wait_break A
aio_write -P 11 0x12000 0x2000
aio_write -P 12 0x1c000 0x2000
resume A
aio_flush
EOF
# Sequential write case: Alloc middle of cluster 2, then write overlapping
# to next cluster
cat <<EOF
break write_aio A
aio_write -P 20 0x28000 0x2000
wait_break A
aio_write -P 21 0x2a000 0x10000
resume A
aio_flush
EOF
# The same with a gap between both requests
cat <<EOF
break write_aio A
aio_write -P 40 0x48000 0x2000
wait_break A
aio_write -P 41 0x4c000 0x10000
resume A
aio_flush
EOF
# Sequential write, but the next cluster is already allocated
cat <<EOF
write -P 70 0x76000 0x8000
aio_flush
break write_aio A
aio_write -P 60 0x66000 0x2000
wait_break A
aio_write -P 61 0x6a000 0xe000
resume A
aio_flush
EOF
# Sequential write, but the next cluster is already allocated
# and phyiscally in the right position
cat <<EOF
write -P 89 0x80000 0x1000
write -P 90 0x96000 0x8000
aio_flush
discard 0x80000 0x10000
aio_flush
break write_aio A
aio_write -P 80 0x86000 0x2000
wait_break A
aio_write -P 81 0x8a000 0xe000
resume A
aio_flush
EOF
# Sequential write, and the next cluster is compressed
cat <<EOF
write -P 109 0xa0000 0x1000
write -c -P 110 0xb0000 0x10000
aio_flush
discard 0xa0000 0x10000
aio_flush
break write_aio A
aio_write -P 100 0xa6000 0x2000
wait_break A
aio_write -P 101 0xaa000 0xe000
resume A
aio_flush
EOF
}
overlay_io | $QEMU_IO blkdebug::$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 0 0 0x10000
echo read -P 1 0x10000 0x2000
echo read -P 11 0x12000 0x2000
echo read -P 1 0x14000 0x4000
echo read -P 10 0x18000 0x2000
echo read -P 1 0x1a000 0x2000
echo read -P 12 0x1c000 0x2000
echo read -P 1 0x1e000 0x2000
echo read -P 2 0x20000 0x8000
echo read -P 20 0x28000 0x2000
echo read -P 21 0x2a000 0x10000
echo read -P 3 0x3a000 0x6000
echo read -P 4 0x40000 0x8000
echo read -P 40 0x48000 0x2000
echo read -P 4 0x4a000 0x2000
echo read -P 41 0x4c000 0x10000
echo read -P 5 0x5c000 0x4000
echo read -P 6 0x60000 0x6000
echo read -P 60 0x66000 0x2000
echo read -P 6 0x68000 0x2000
echo read -P 61 0x6a000 0xe000
echo read -P 70 0x78000 0x6000
echo read -P 7 0x7e000 0x2000
echo read -P 8 0x80000 0x6000
echo read -P 80 0x86000 0x2000
echo read -P 8 0x88000 0x2000
echo read -P 81 0x8a000 0xe000
echo read -P 90 0x98000 0x6000
echo read -P 9 0x9e000 0x2000
echo read -P 10 0xa0000 0x6000
echo read -P 100 0xa6000 0x2000
echo read -P 10 0xa8000 0x2000
echo read -P 101 0xaa000 0xe000
echo read -P 110 0xb8000 0x8000
}
verify_io | $QEMU_IO $TEST_IMG | _filter_qemu_io
_check_test_img
# success, all done
echo "*** done"
rm -f $seq.full
status=0
|
