1#!/usr/bin/env bash 2# group: rw quick 3# 4# Test qemu-img vs. unaligned images 5# (See also 253, which is the O_DIRECT version) 6# 7# Copyright (C) 2018-2019 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 $seq" 25 26status=1 # failure is the default! 27 28_cleanup() 29{ 30 _cleanup_test_img 31} 32trap "_cleanup; exit \$status" 0 1 2 3 15 33 34# get standard environment, filters and checks 35. ./common.rc 36. ./common.filter 37 38_supported_fmt raw 39_supported_proto file fuse 40_supported_os Linux 41 42_default_cache_mode writeback 43_supported_cache_modes writeback writethrough unsafe 44_require_disk_usage 45 46echo 47echo "=== Check mapping of unaligned raw image ===" 48echo 49 50_make_test_img 65537 # qemu-img create rounds size up 51 52# file-posix allocates the first block of any images when it is created; 53# the size of this block depends on the host page size and the file 54# system block size, none of which are constant. Discard the whole 55# image so we will not see this allocation in qemu-img map's output. 56$QEMU_IO -c 'discard 0 65537' "$TEST_IMG" | _filter_qemu_io 57 58$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 59 60truncate --size=65537 "$TEST_IMG" # so we resize it and check again 61$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 62 63$QEMU_IO -c 'w 65536 1' "$TEST_IMG" | _filter_qemu_io # writing also rounds up 64$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 65 66truncate --size=65537 "$TEST_IMG" # so we resize it and check again 67$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 68 69# success, all done 70echo '*** done' 71rm -f $seq.full 72status=0 73