qemu-iotests: add test for refcount table growth and snapshots

015: Combined test to grow the refcount table and test snapshots.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Kevin Wolf 2009-07-03 17:45:56 +02:00
parent 5d9c577dd1
commit 3778057d60
3 changed files with 106 additions and 0 deletions

85
tests/qemu-iotests/015 Executable file
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#!/bin/sh
#
# Combined test to grow the refcount table and test snapshots.
#
# Copyright (C) 2009 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
#
# 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
true
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
# currently only qcow2 allows for consistency checks using qemu-img
_supported_fmt qcow2
_supported_os Linux
echo
echo "creating image"
# With 1k clusters a refcount block contains 512 clusters
# This makes 512k of the image file covered by a refcount block
# A refcount table that spans one clusters has 128 refcount
# tables which makes up 64M in the image file.
#
# We use a 36M image, so initially we can be sure that only one cluster is used
# for the refcount table. On the other hand this is big enough to cause a
# refcount table growth when rewriting the image after creating one snapshot.
size=36M
_make_test_img -o cluster_size=1k $size
# Create two snapshots which fill the image with two different patterns
echo "creating first snapshot"
$QEMU_IO -c "aio_write -P 123 0 $size" $TEST_IMG | _filter_qemu_io
$QEMU_IMG snapshot -c snap1 $TEST_IMG
echo "creating second snapshot"
$QEMU_IO -c "aio_write -P 165 0 $size" $TEST_IMG | _filter_qemu_io
$QEMU_IMG snapshot -c snap2 $TEST_IMG
# Now check the pattern
echo "checking first snapshot"
$QEMU_IMG snapshot -a snap1 $TEST_IMG
$QEMU_IO -c "aio_read -P 123 0 $size" $TEST_IMG | _filter_qemu_io
echo "checking second snapshot"
$QEMU_IMG snapshot -a snap2 $TEST_IMG
$QEMU_IO -c "aio_read -P 165 0 $size" $TEST_IMG | _filter_qemu_io
echo
echo "checking image for errors"
_check_test_img
# success, all done
echo "*** done"
rm -f $seq.full
status=0

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QA output created by 015
creating image
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=37748736 cluster_size=1024
creating first snapshot
wrote 37748736/37748736 bytes at offset 0
36 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
creating second snapshot
wrote 37748736/37748736 bytes at offset 0
36 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
checking first snapshot
read 37748736/37748736 bytes at offset 0
36 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
checking second snapshot
read 37748736/37748736 bytes at offset 0
36 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
checking image for errors
No errors were found on the image.
*** done

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012 auto
013 rw auto
014 rw auto
015 rw snapshot auto