--- /dev/null
+#!/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 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 <<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
+
+# Reverse sequential write
+cat <<EOF
+break write_aio A
+aio_write -P 121 0xdc000 0x2000
+wait_break A
+aio_write -P 120 0xc4000 0x18000
+resume A
+aio_flush
+EOF
+
+# Reverse sequential write with a gap
+cat <<EOF
+break write_aio A
+aio_write -P 141 0xfc000 0x2000
+wait_break A
+aio_write -P 140 0xe4000 0x14000
+resume A
+aio_flush
+EOF
+
+# Allocate an area in the middle and then overwrite with a larger request
+cat <<EOF
+break write_aio A
+aio_write -P 161 0x10c000 0x8000
+wait_break A
+aio_write -P 160 0x104000 0x18000
+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()
+{
+ if ($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep "compat: 0.10" > /dev/null); then
+ # For v2 images, discarded clusters are read from the backing file
+ # Keep the variable empty so that the backing file value can be used as
+ # the default below
+ discarded=
+ else
+ # Discarded clusters are zeroed for v3 or later
+ discarded=0
+ fi
+
+ 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 ${discarded:-8} 0x80000 0x6000
+ echo read -P 80 0x86000 0x2000
+ echo read -P ${discarded:-8} 0x88000 0x2000
+ echo read -P 81 0x8a000 0xe000
+ echo read -P 90 0x98000 0x6000
+ echo read -P 9 0x9e000 0x2000
+
+ echo read -P ${discarded:-10} 0xa0000 0x6000
+ echo read -P 100 0xa6000 0x2000
+ echo read -P ${discarded:-10} 0xa8000 0x2000
+ echo read -P 101 0xaa000 0xe000
+ echo read -P 110 0xb8000 0x8000
+
+ echo read -P 12 0xc0000 0x4000
+ echo read -P 120 0xc4000 0x18000
+ echo read -P 121 0xdc000 0x2000
+ echo read -P 13 0xde000 0x2000
+
+ echo read -P 14 0xe0000 0x4000
+ echo read -P 140 0xe4000 0x14000
+ echo read -P 15 0xf8000 0x4000
+ echo read -P 141 0xfc000 0x2000
+ echo read -P 15 0xfe000 0x2000
+
+ echo read -P 16 0x100000 0x4000
+ echo read -P 160 0x104000 0x8000
+ # Undefined content for 0x10c000 0x8000
+ echo read -P 160 0x114000 0x8000
+ echo read -P 17 0x11c000 0x4000
+}
+
+verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
+
+_check_test_img
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
Code Review / kvmfornfv.git / blobdiff