1#!/usr/bin/env bash 2# group: rw quick 3# 4# Test qemu-img vs. unaligned images; O_DIRECT version 5# (Originates from 221) 6# 7# Copyright (C) 2019 Red Hat, Inc. 8# 9# This program is free software; you can redistribute it and/or modify 10# it under the terms of the GNU General Public License as published by 11# the Free Software Foundation; either version 2 of the License, or 12# (at your option) any later version. 13# 14# This program is distributed in the hope that it will be useful, 15# but WITHOUT ANY WARRANTY; without even the implied warranty of 16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17# GNU General Public License for more details. 18# 19# You should have received a copy of the GNU General Public License 20# along with this program. If not, see <http://www.gnu.org/licenses/>. 21# 22 23seq="$(basename $0)" 24echo "QA output created by $seq" 25 26status=1 # failure is the default! 27 28_cleanup() 29{ 30 _cleanup_test_img 31} 32trap "_cleanup; exit \$status" 0 1 2 3 15 33 34# get standard environment, filters and checks 35. ./common.rc 36. ./common.filter 37 38_supported_fmt raw 39_supported_proto file 40_supported_os Linux 41 42_default_cache_mode none 43_supported_cache_modes none directsync 44 45echo 46echo "=== Check mapping of unaligned raw image ===" 47echo 48 49# We do not know how large a physical sector is, but it is certainly 50# going to be a factor of 1 MB 51size=$((1 * 1024 * 1024 - 1)) 52 53# qemu-img create rounds size up to BDRV_SECTOR_SIZE 54_make_test_img $size 55$QEMU_IMG map --output=json --image-opts \ 56 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 57 | _filter_qemu_img_map 58 59# so we resize it and check again 60truncate --size=$size "$TEST_IMG" 61$QEMU_IMG map --output=json --image-opts \ 62 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 63 | _filter_qemu_img_map 64 65# qemu-io with O_DIRECT always writes whole physical sectors. Again, 66# we do not know how large a physical sector is, so we just start 67# writing from a 64 kB boundary, which should always be aligned. 68offset=$((1 * 1024 * 1024 - 64 * 1024)) 69$QEMU_IO -c "w $offset $((size - offset))" "$TEST_IMG" | _filter_qemu_io 70$QEMU_IMG map --output=json --image-opts \ 71 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 72 | _filter_qemu_img_map 73 74# Resize it and check again -- contrary to 221, we may not get partial 75# sectors here, so there should be only two areas (one zero, one 76# data). 77truncate --size=$size "$TEST_IMG" 78$QEMU_IMG map --output=json --image-opts \ 79 "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \ 80 | _filter_qemu_img_map 81 82# success, all done 83echo '*** done' 84rm -f $seq.full 85status=0 86