mirror of https://gitlab.com/qemu-project/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
5.3 KiB
Bash
143 lines
5.3 KiB
Bash
#!/usr/bin/env bash
|
|
# group: rw auto
|
|
#
|
|
# Test qcow2 image compression
|
|
#
|
|
# Copyright (C) 2018 Igalia, S.L.
|
|
# Author: Alberto Garcia <berto@igalia.com>
|
|
#
|
|
# 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/>.
|
|
#
|
|
|
|
seq=$(basename "$0")
|
|
echo "QA output created by $seq"
|
|
|
|
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 fuse
|
|
|
|
# Repairing the corrupted image requires qemu-img check to store a
|
|
# refcount up to 3, which requires at least two refcount bits.
|
|
# External data files do not support compressed clusters.
|
|
_unsupported_imgopts 'refcount_bits=1[^0-9]' data_file
|
|
|
|
|
|
echo
|
|
echo "=== Corrupted size field in compressed cluster descriptor ==="
|
|
echo
|
|
# Create an empty image and fill half of it with compressed data.
|
|
# The L2 entries of the two compressed clusters are located at
|
|
# 0x800000 and 0x800008, their original values are 0x4008000000a00000
|
|
# and 0x4008000000a00802 (5 sectors for compressed data each).
|
|
_make_test_img 8M -o cluster_size=2M,compression_type=zlib
|
|
$QEMU_IO -c "write -c -P 0x11 0 2M" -c "write -c -P 0x11 2M 2M" "$TEST_IMG" \
|
|
2>&1 | _filter_qemu_io | _filter_testdir
|
|
|
|
# Reduce size of compressed data to 4 sectors: this corrupts the image.
|
|
poke_file "$TEST_IMG" $((0x800000)) "\x40\x06"
|
|
$QEMU_IO -c "read -P 0x11 0 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
|
|
|
|
# 'qemu-img check' however doesn't see anything wrong because it
|
|
# doesn't try to decompress the data and the refcounts are consistent.
|
|
# TODO: update qemu-img so this can be detected.
|
|
_check_test_img
|
|
|
|
# Increase size of compressed data to the maximum (8192 sectors).
|
|
# This makes QEMU read more data (8192 sectors instead of 5, host
|
|
# addresses [0xa00000, 0xdfffff]), but the decompression algorithm
|
|
# stops once we have enough to restore the uncompressed cluster, so
|
|
# the rest of the data is ignored.
|
|
poke_file "$TEST_IMG" $((0x800000)) "\x7f\xfe"
|
|
# Do it also for the second compressed cluster (L2 entry at 0x800008).
|
|
# In this case the compressed data would span 3 host clusters
|
|
# (host addresses: [0xa00802, 0xe00801])
|
|
poke_file "$TEST_IMG" $((0x800008)) "\x7f\xfe"
|
|
|
|
# Here the image is too small so we're asking QEMU to read beyond the
|
|
# end of the image.
|
|
$QEMU_IO -c "read -P 0x11 0 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
|
|
# But if we grow the image we won't be reading beyond its end anymore.
|
|
$QEMU_IO -c "write -P 0x22 4M 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
|
|
$QEMU_IO -c "read -P 0x11 0 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
|
|
|
|
# The refcount data is however wrong because due to the increased size
|
|
# of the compressed data it now reaches the following host clusters.
|
|
# This can be repaired by qemu-img check by increasing the refcount of
|
|
# those clusters.
|
|
# TODO: update qemu-img to correct the compressed cluster size instead.
|
|
_check_test_img -r all
|
|
$QEMU_IO -c "read -P 0x11 0 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
|
|
$QEMU_IO -c "read -P 0x22 4M 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
|
|
|
|
echo
|
|
echo "=== Write compressed data of multiple clusters ==="
|
|
echo
|
|
cluster_size=0x10000
|
|
_make_test_img 2M -o cluster_size=$cluster_size
|
|
|
|
echo "Write uncompressed data:"
|
|
let data_size="8 * $cluster_size"
|
|
$QEMU_IO -c "write -P 0xaa 0 $data_size" "$TEST_IMG" \
|
|
2>&1 | _filter_qemu_io | _filter_testdir
|
|
sizeA=$($QEMU_IMG info --output=json "$TEST_IMG" |
|
|
sed -n '/"actual-size":/ s/[^0-9]//gp' |
|
|
head -n 1)
|
|
|
|
_make_test_img 2M -o cluster_size=$cluster_size
|
|
echo "Write compressed data:"
|
|
let data_size="3 * $cluster_size + $cluster_size / 2"
|
|
# Set compress on. That will align the written data
|
|
# by the cluster size and will write them compressed.
|
|
QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT \
|
|
$QEMU_IO -c "write -P 0xbb 0 $data_size" --image-opts \
|
|
"driver=compress,file.driver=$IMGFMT,file.file.driver=file,file.file.filename=$TEST_IMG" \
|
|
2>&1 | _filter_qemu_io | _filter_testdir
|
|
|
|
let offset="4 * $cluster_size + $cluster_size / 4"
|
|
QEMU_IO_OPTIONS=$QEMU_IO_OPTIONS_NO_FMT \
|
|
$QEMU_IO -c "write -P 0xcc $offset $data_size" "json:{\
|
|
'driver': 'compress',
|
|
'file': {'driver': '$IMGFMT',
|
|
'file': {'driver': 'file',
|
|
'filename': '$TEST_IMG'}}}" | \
|
|
_filter_qemu_io | _filter_testdir
|
|
|
|
sizeB=$($QEMU_IMG info --output=json "$TEST_IMG" |
|
|
sed -n '/"actual-size":/ s/[^0-9]//gp' |
|
|
head -n 1)
|
|
|
|
if [ $sizeA -lt $sizeB ]
|
|
then
|
|
echo "Compression ERROR ($sizeA < $sizeB)"
|
|
fi
|
|
|
|
$QEMU_IMG check --output=json "$TEST_IMG" |
|
|
sed -n 's/,$//; /"compressed-clusters":/ s/^ *//p'
|
|
|
|
# success, all done
|
|
echo '*** done'
|
|
rm -f $seq.full
|
|
status=0
|