1#!/usr/bin/env bash 2# group: rw auto quick 3# 4# Test aligned and misaligned write zeroes operations. 5# 6# Copyright (C) 2012 Red Hat, Inc. 7# 8# This program is free software; you can redistribute it and/or modify 9# it under the terms of the GNU General Public License as published by 10# the Free Software Foundation; either version 2 of the License, or 11# (at your option) any later version. 12# 13# This program is distributed in the hope that it will be useful, 14# but WITHOUT ANY WARRANTY; without even the implied warranty of 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16# GNU General Public License for more details. 17# 18# You should have received a copy of the GNU General Public License 19# along with this program. If not, see <http://www.gnu.org/licenses/>. 20# 21 22# creator 23owner=pbonzini@redhat.com 24 25seq=`basename $0` 26echo "QA output created by $seq" 27 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33} 34trap "_cleanup; exit \$status" 0 1 2 3 15 35 36# get standard environment, filters and checks 37. ./common.rc 38. ./common.filter 39 40_supported_fmt generic 41_supported_proto generic 42_unsupported_imgopts "subformat=streamOptimized" 43 44 45size=128M 46_make_test_img $size 47 48do_test() 49{ 50 local align=$1 51 local iocmd=$2 52 local img=$3 53 if [ "$IMGOPTSSYNTAX" = "true" ] 54 then 55 IO_OPEN_ARG="$img" 56 IO_EXTRA_ARGS="--image-opts" 57 else 58 IO_OPEN_ARG="-o driver=$IMGFMT,file.align=$align blkdebug::$img" 59 IO_EXTRA_ARGS="" 60 fi 61 { 62 echo "open $IO_OPEN_ARG" 63 echo $iocmd 64 } | $QEMU_IO $IO_EXTRA_ARGS 65} 66 67echo 68echo "=== Test aligned and misaligned write zeroes operations ===" 69 70for write_zero_cmd in "write -z" "aio_write -z"; do 71for align in 512 4k; do 72 echo 73 echo "== preparing image ==" 74 do_test $align "write -P 0xa 0x200 0x400" "$TEST_IMG" | _filter_qemu_io 75 do_test $align "write -P 0xa 0x20000 0x600" "$TEST_IMG" | _filter_qemu_io 76 do_test $align "$write_zero_cmd 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io 77 78 echo 79 echo "== verifying patterns (1) ==" 80 do_test $align "read -P 0xa 0x200 0x200" "$TEST_IMG" | _filter_qemu_io 81 do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io 82 do_test $align "read -P 0xa 0x20400 0x200" "$TEST_IMG" | _filter_qemu_io 83 84 echo 85 echo "== rewriting zeroes ==" 86 do_test $align "write -P 0xb 0x10000 0x10000" "$TEST_IMG" | _filter_qemu_io 87 do_test $align "$write_zero_cmd 0x10000 0x10000" "$TEST_IMG" | _filter_qemu_io 88 89 echo 90 echo "== verifying patterns (2) ==" 91 do_test $align "read -P 0x0 0x400 0x20000" "$TEST_IMG" | _filter_qemu_io 92 93 echo 94 echo "== rewriting unaligned zeroes ==" 95 do_test $align "write -P 0xb 0x0 0x1000" "$TEST_IMG" | _filter_qemu_io 96 do_test $align "$write_zero_cmd 0x200 0x200" "$TEST_IMG" | _filter_qemu_io 97 98 echo 99 echo "== verifying patterns (3) ==" 100 do_test $align "read -P 0xb 0x0 0x200" "$TEST_IMG" | _filter_qemu_io 101 do_test $align "read -P 0x0 0x200 0x200" "$TEST_IMG" | _filter_qemu_io 102 do_test $align "read -P 0xb 0x400 0xc00" "$TEST_IMG" | _filter_qemu_io 103 104 echo 105done 106done 107 108_cleanup_test_img 109 110# Trigger truncate that would shrink qcow2 L1 table, which is done by 111# clearing one entry (8 bytes) with bdrv_co_pwrite_zeroes() 112 113echo 114echo "=== Test misaligned write zeroes via truncate ===" 115echo 116 117# any size will do, but the smaller the size the smaller the required image 118CLUSTER_SIZE=$((4 * 1024)) 119L2_COVERAGE=$(($CLUSTER_SIZE * $CLUSTER_SIZE / 8)) 120_make_test_img $(($L2_COVERAGE * 2)) 121 122do_test 512 "write -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io 123# next L2 table 124do_test 512 "write -P 1 $L2_COVERAGE 0x200" "$TEST_IMG" | _filter_qemu_io 125 126# only interested in qcow2 here; also other formats might respond with 127# "not supported" error message 128if [ $IMGFMT = "qcow2" ]; then 129 do_test 512 "truncate $L2_COVERAGE" "$TEST_IMG" | _filter_qemu_io 130fi 131 132do_test 512 "read -P 1 0 0x200" "$TEST_IMG" | _filter_qemu_io 133 134# success, all done 135echo 136echo "*** done" 137rm -f $seq.full 138status=0 139