91d4093dce
This adds some first tests for qcow2's dependency handling when two parallel write requests access the same cluster. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
216 lines
4.6 KiB
Bash
Executable File
216 lines
4.6 KiB
Bash
Executable File
#!/bin/bash
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#
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# Test concurrent cluster allocations
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#
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# Copyright (C) 2012 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# creator
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owner=kwolf@redhat.com
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seq=`basename $0`
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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_supported_fmt qcow2
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_supported_proto generic
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_supported_os Linux
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CLUSTER_SIZE=64k
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size=128M
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echo
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echo "== creating backing file for COW tests =="
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_make_test_img $size
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function backing_io()
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{
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local offset=$1
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local sectors=$2
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local op=$3
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local pattern=0
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local cur_sec=0
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for i in $(seq 0 $((sectors - 1))); do
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cur_sec=$((offset / 65536 + i))
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pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
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echo "$op -P $pattern $((cur_sec * 64))k 64k"
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done
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}
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backing_io 0 16 write | $QEMU_IO $TEST_IMG | _filter_qemu_io
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mv $TEST_IMG $TEST_IMG.base
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_make_test_img -b $TEST_IMG.base 6G
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echo
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echo "== Some concurrent requests touching the same cluster =="
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function overlay_io()
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{
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# Allocate middle of cluster 1, then write to somewhere before and after it
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cat <<EOF
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break write_aio A
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aio_write -P 10 0x18000 0x2000
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wait_break A
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aio_write -P 11 0x12000 0x2000
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aio_write -P 12 0x1c000 0x2000
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resume A
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aio_flush
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EOF
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# Sequential write case: Alloc middle of cluster 2, then write overlapping
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# to next cluster
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cat <<EOF
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break write_aio A
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aio_write -P 20 0x28000 0x2000
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wait_break A
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aio_write -P 21 0x2a000 0x10000
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resume A
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aio_flush
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EOF
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# The same with a gap between both requests
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cat <<EOF
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break write_aio A
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aio_write -P 40 0x48000 0x2000
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wait_break A
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aio_write -P 41 0x4c000 0x10000
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resume A
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aio_flush
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EOF
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# Sequential write, but the next cluster is already allocated
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cat <<EOF
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write -P 70 0x76000 0x8000
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aio_flush
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break write_aio A
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aio_write -P 60 0x66000 0x2000
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wait_break A
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aio_write -P 61 0x6a000 0xe000
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resume A
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aio_flush
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EOF
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# Sequential write, but the next cluster is already allocated
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# and phyiscally in the right position
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cat <<EOF
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write -P 89 0x80000 0x1000
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write -P 90 0x96000 0x8000
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aio_flush
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discard 0x80000 0x10000
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aio_flush
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break write_aio A
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aio_write -P 80 0x86000 0x2000
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wait_break A
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aio_write -P 81 0x8a000 0xe000
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resume A
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aio_flush
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EOF
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# Sequential write, and the next cluster is compressed
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cat <<EOF
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write -P 109 0xa0000 0x1000
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write -c -P 110 0xb0000 0x10000
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aio_flush
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discard 0xa0000 0x10000
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aio_flush
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break write_aio A
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aio_write -P 100 0xa6000 0x2000
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wait_break A
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aio_write -P 101 0xaa000 0xe000
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resume A
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aio_flush
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EOF
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}
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overlay_io | $QEMU_IO blkdebug::$TEST_IMG | _filter_qemu_io |\
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sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g'
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echo
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echo "== Verify image content =="
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function verify_io()
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{
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echo read -P 0 0 0x10000
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echo read -P 1 0x10000 0x2000
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echo read -P 11 0x12000 0x2000
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echo read -P 1 0x14000 0x4000
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echo read -P 10 0x18000 0x2000
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echo read -P 1 0x1a000 0x2000
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echo read -P 12 0x1c000 0x2000
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echo read -P 1 0x1e000 0x2000
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echo read -P 2 0x20000 0x8000
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echo read -P 20 0x28000 0x2000
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echo read -P 21 0x2a000 0x10000
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echo read -P 3 0x3a000 0x6000
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echo read -P 4 0x40000 0x8000
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echo read -P 40 0x48000 0x2000
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echo read -P 4 0x4a000 0x2000
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echo read -P 41 0x4c000 0x10000
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echo read -P 5 0x5c000 0x4000
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echo read -P 6 0x60000 0x6000
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echo read -P 60 0x66000 0x2000
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echo read -P 6 0x68000 0x2000
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echo read -P 61 0x6a000 0xe000
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echo read -P 70 0x78000 0x6000
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echo read -P 7 0x7e000 0x2000
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echo read -P 8 0x80000 0x6000
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echo read -P 80 0x86000 0x2000
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echo read -P 8 0x88000 0x2000
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echo read -P 81 0x8a000 0xe000
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echo read -P 90 0x98000 0x6000
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echo read -P 9 0x9e000 0x2000
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echo read -P 10 0xa0000 0x6000
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echo read -P 100 0xa6000 0x2000
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echo read -P 10 0xa8000 0x2000
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echo read -P 101 0xaa000 0xe000
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echo read -P 110 0xb8000 0x8000
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}
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verify_io | $QEMU_IO $TEST_IMG | _filter_qemu_io
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_check_test_img
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# success, all done
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echo "*** done"
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rm -f $seq.full
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status=0
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