#!/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 .
#
# 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 file
_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 32 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 <