bf22957309
Running git grep '\$here' tests/qemu-iotests has 0 hits, which means we are setting a variable that has no use. It appears that commit e8f8624d removed the last use. So execute the following cmd to remove all of the 'here=...' lines as dead code. sed -i '/^here=/d' $(git grep -l '^here=' tests/qemu-iotests) Cc: kwolf@redhat.com Cc: mreitz@redhat.com Cc: eblake@redhat.com Suggested-by: Eric Blake <eblake@redhat.com> Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com> Message-Id: <20181024094051.4470-3-maozhongyi@cmss.chinamobile.com> Reviewed-by: Eric Blake <eblake@redhat.com> [eblake: touch up commit message, reorder series, rebase to master] Signed-off-by: Eric Blake <eblake@redhat.com>
97 lines
3.6 KiB
Bash
Executable File
97 lines
3.6 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# Test qcow2 image compression
|
|
#
|
|
# Copyright (C) 2018 Igalia, S.L.
|
|
# Author: Alberto Garcia <berto@igalia.com>
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
|
|
seq=$(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
|
|
_supported_os Linux
|
|
|
|
# Repairing the corrupted image requires qemu-img check to store a
|
|
# refcount up to 3, which requires at least two refcount bits.
|
|
_unsupported_imgopts 'refcount_bits=1[^0-9]'
|
|
|
|
|
|
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
|
|
$QEMU_IO -c "write -c -P 0x11 0 2M" -c "write -c -P 0x11 2M 2M" "$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
|
|
|
|
# success, all done
|
|
echo '*** done'
|
|
rm -f $seq.full
|
|
status=0
|