From 0f46147e10db2b87151083525c34ec18dd55e91f Mon Sep 17 00:00:00 2001 From: Alberto Garcia Date: Tue, 12 Jan 2021 18:05:40 +0100 Subject: [PATCH] iotests: Add test for the regression fixed in c8bf9a9169 Signed-off-by: Alberto Garcia Suggested-by: Maxim Levitsky Reviewed-by: Maxim Levitsky Message-Id: <20210112170540.2912-1-berto@igalia.com> [mreitz: Add "# group:" line] Signed-off-by: Max Reitz --- tests/qemu-iotests/313 | 104 +++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/313.out | 29 +++++++++++ tests/qemu-iotests/group | 1 + 3 files changed, 134 insertions(+) create mode 100755 tests/qemu-iotests/313 create mode 100644 tests/qemu-iotests/313.out diff --git a/tests/qemu-iotests/313 b/tests/qemu-iotests/313 new file mode 100755 index 0000000000..a75655b7ef --- /dev/null +++ b/tests/qemu-iotests/313 @@ -0,0 +1,104 @@ +#!/usr/bin/env bash +# group: rw auto quick +# +# Test for the regression fixed in commit c8bf9a9169 +# +# Copyright (C) 2020 Igalia, S.L. +# Author: Alberto Garcia +# Based on a test case by Maxim Levitsky +# +# 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 . +# + +# creator +owner=berto@igalia.com + +seq=`basename $0` +echo "QA output created by $seq" + +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +_supported_fmt qcow2 +_supported_proto file +_supported_os Linux +_unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file + +# The cluster size must be at least the granularity of the mirror job (4KB) +# Note that larger cluster sizes will produce very large images (several GBs) +cluster_size=4096 +refcount_bits=64 # Make it equal to the L2 entry size for convenience +options="cluster_size=${cluster_size},refcount_bits=${refcount_bits}" + +# Number of refcount entries per refcount blocks +ref_entries=$(( ${cluster_size} * 8 / ${refcount_bits} )) + +# Number of data clusters needed to fill a refcount block +# Equals ${ref_entries} minus two (one L2 table and one refcount block) +data_clusters_per_refblock=$(( ${ref_entries} - 2 )) + +# Number of entries in the refcount cache +ref_blocks=4 + +# Write enough data clusters to fill the refcount cache and allocate +# one more refcount block. +# Subtract 3 clusters from the total: qcow2 header, refcount table, L1 table +total_data_clusters=$(( ${data_clusters_per_refblock} * ${ref_blocks} + 1 - 3 )) + +# Total size to write in bytes +total_size=$(( ${total_data_clusters} * ${cluster_size} )) + +echo +echo '### Create the image' +echo +TEST_IMG_FILE=$TEST_IMG.base _make_test_img -o $options $total_size | _filter_img_create_size + +echo +echo '### Write data to allocate more refcount blocks than the cache can hold' +echo +$QEMU_IO -c "write -P 1 0 $total_size" $TEST_IMG.base | _filter_qemu_io + +echo +echo '### Create an overlay' +echo +_make_test_img -F $IMGFMT -b $TEST_IMG.base -o $options | _filter_img_create_size + +echo +echo '### Fill the overlay with zeroes' +echo +$QEMU_IO -c "write -z 0 $total_size" $TEST_IMG | _filter_qemu_io + +echo +echo '### Commit changes to the base image' +echo +$QEMU_IMG commit $TEST_IMG + +echo +echo '### Check the base image' +echo +$QEMU_IMG check $TEST_IMG.base + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 diff --git a/tests/qemu-iotests/313.out b/tests/qemu-iotests/313.out new file mode 100644 index 0000000000..adb9f7bd95 --- /dev/null +++ b/tests/qemu-iotests/313.out @@ -0,0 +1,29 @@ +QA output created by 313 + +### Create the image + +Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=SIZE + +### Write data to allocate more refcount blocks than the cache can hold + +wrote 8347648/8347648 bytes at offset 0 +7.961 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +### Create an overlay + +Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=SIZE backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT + +### Fill the overlay with zeroes + +wrote 8347648/8347648 bytes at offset 0 +7.961 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) + +### Commit changes to the base image + +Image committed. + +### Check the base image + +No errors were found on the image. +Image end offset: 8396800 +*** done diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index d4a3e36a9a..a0d0bf1688 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -320,3 +320,4 @@ 309 rw auto quick 310 rw quick 312 rw quick +313 rw auto quick