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