1#!/usr/bin/env bash 2# 3# Test qemu-img vs. unaligned images; O_DIRECT version 4# (Originates from 221) 5# 6# Copyright (C) 2019 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 22seq="$(basename $0)" 23echo "QA output created by $seq" 24 25status=1 # failure is the default! 26 27_cleanup() 28{ 29 _cleanup_test_img 30} 31trap "_cleanup; exit \$status" 0 1 2 3 15 32 33# get standard environment, filters and checks 34. ./common.rc 35. ./common.filter 36 37_supported_fmt raw 38_supported_proto file 39_supported_os Linux 40 41_default_cache_mode none 42_supported_cache_modes none directsync 43 44echo 45echo "=== Check mapping of unaligned raw image ===" 46echo 47 48# We do not know how large a physical sector is, but it is certainly 49# going to be a factor of 1 MB 50size=$((1 * 1024 * 1024 - 1)) 51 52# qemu-img create rounds size up to BDRV_SECTOR_SIZE 53_make_test_img $size 54$QEMU_IMG map --output=json --image-opts \ 55 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 56 | _filter_qemu_img_map 57 58# so we resize it and check again 59truncate --size=$size "$TEST_IMG" 60$QEMU_IMG map --output=json --image-opts \ 61 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 62 | _filter_qemu_img_map 63 64# qemu-io with O_DIRECT always writes whole physical sectors. Again, 65# we do not know how large a physical sector is, so we just start 66# writing from a 64 kB boundary, which should always be aligned. 67offset=$((1 * 1024 * 1024 - 64 * 1024)) 68$QEMU_IO -c "w $offset $((size - offset))" "$TEST_IMG" | _filter_qemu_io 69$QEMU_IMG map --output=json --image-opts \ 70 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 71 | _filter_qemu_img_map 72 73# Resize it and check again -- contrary to 221, we may not get partial 74# sectors here, so there should be only two areas (one zero, one 75# data). 76truncate --size=$size "$TEST_IMG" 77$QEMU_IMG map --output=json --image-opts \ 78 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 79 | _filter_qemu_img_map 80 81# success, all done 82echo '*** done' 83rm -f $seq.full 84status=0 85