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Diffstat (limited to 'tests/qemu-iotests/033')
| -rwxr-xr-x | tests/qemu-iotests/033 | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/tests/qemu-iotests/033 b/tests/qemu-iotests/033 new file mode 100755 index 000000000..da9133c44 --- /dev/null +++ b/tests/qemu-iotests/033 @@ -0,0 +1,138 @@ +#!/usr/bin/env bash +# group: rw auto quick +# +# Test aligned and misaligned write zeroes operations. +# +# Copyright (C) 2012 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, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=pbonzini@redhat.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 generic +_supported_proto generic +_unsupported_imgopts "subformat=streamOptimized" + + +size=128M +_make_test_img $size + +do_test() +{ + local align=$1 + local iocmd=$2 + local img=$3 + if [ "$IMGOPTSSYNTAX" = "true" ] + then + IO_OPEN_ARG="$img" + IO_EXTRA_ARGS="--image-opts" + else + IO_OPEN_ARG="-o driver=$IMGFMT,file.align=$align blkdebug::$img" + IO_EXTRA_ARGS="" + fi + { + echo "open $IO_OPEN_ARG" + echo $iocmd + } | $QEMU_IO $IO_EXTRA_ARGS +} + +echo +echo "=== Test aligned and misaligned write zeroes operations ===" + +for write_zero_cmd in "write -z" "aio_write -z"; do +for align in 512 4k; do + echo + echo "== preparing image ==" + do_test $align "write -P 0xa 0x200 0x400" "$TEST_IMG" | _filter_qemu_io + do_test $align "write -P 0xa 0x20000 0x600" "$TEST_IMG" | _filter_qemu_io + do_test $align "$write_zero_cmd 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io + + echo + echo "== verifying patterns (1) ==" + do_test $align "read -P 0xa 0x200 0x200" "$TEST_IMG" | _filter_qemu_io + do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io + do_test $align "read -P 0xa 0x20400 0x200" "$TEST_IMG" | _filter_qemu_io + + echo + echo "== rewriting zeroes ==" + do_test $align "write -P 0xb 0x10000 0x10000" "$TEST_IMG" | _filter_qemu_io + do_test $align "$write_zero_cmd 0x10000 0x10000" "$TEST_IMG" | _filter_qemu_io + + echo + echo "== verifying patterns (2) ==" + do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io + + echo + echo "== rewriting unaligned zeroes ==" + do_test $align "write -P 0xb 0x0 0x1000" "$TEST_IMG" | _filter_qemu_io + do_test $align "$write_zero_cmd 0x200 0x200" "$TEST_IMG" | _filter_qemu_io + + echo + echo "== verifying patterns (3) ==" + do_test $align "read -P 0xb 0x0 0x200" "$TEST_IMG" | _filter_qemu_io + do_test $align "read -P 0x0 0x200 0x200" "$TEST_IMG" | _filter_qemu_io + do_test $align "read -P 0xb 0x400 0xc00" "$TEST_IMG" | _filter_qemu_io + + echo +done +done + +_cleanup_test_img + +# Trigger truncate that would shrink qcow2 L1 table, which is done by +# clearing one entry (8 bytes) with bdrv_co_pwrite_zeroes() + +echo +echo "=== Test misaligned write zeroes via truncate ===" +echo + +# any size will do, but the smaller the size the smaller the required image +CLUSTER_SIZE=$((4 * 1024)) +L2_COVERAGE=$(($CLUSTER_SIZE * $CLUSTER_SIZE / 8)) +_make_test_img $(($L2_COVERAGE * 2)) + +do_test 512 "write -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io +# next L2 table +do_test 512 "write -P 1 $L2_COVERAGE 0x200" "$TEST_IMG" | _filter_qemu_io + +# only interested in qcow2 here; also other formats might respond with +# "not supported" error message +if [ $IMGFMT = "qcow2" ]; then + do_test 512 "truncate $L2_COVERAGE" "$TEST_IMG" | _filter_qemu_io +fi + +do_test 512 "read -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io + +# success, all done +echo +echo "*** done" +rm -f $seq.full +status=0 |