1#!/usr/bin/env bash 2# 3# Test qemu-img vs. unaligned images 4# (See also 253, which is the O_DIRECT version) 5# 6# Copyright (C) 2018-2019 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 $seq" 24 25status=1 # failure is the default! 26 27_cleanup() 28{ 29 _cleanup_test_img 30} 31trap "_cleanup; exit \$status" 0 1 2 3 15 32 33# get standard environment, filters and checks 34. ./common.rc 35. ./common.filter 36 37_supported_fmt raw 38_supported_proto file fuse 39_supported_os Linux 40 41_default_cache_mode writeback 42_supported_cache_modes writeback writethrough unsafe 43 44echo 45echo "=== Check mapping of unaligned raw image ===" 46echo 47 48_make_test_img 65537 # qemu-img create rounds size up 49 50# file-posix allocates the first block of any images when it is created; 51# the size of this block depends on the host page size and the file 52# system block size, none of which are constant. Discard the whole 53# image so we will not see this allocation in qemu-img map's output. 54$QEMU_IO -c 'discard 0 65537' "$TEST_IMG" | _filter_qemu_io 55 56$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 57 58truncate --size=65537 "$TEST_IMG" # so we resize it and check again 59$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 60 61$QEMU_IO -c 'w 65536 1' "$TEST_IMG" | _filter_qemu_io # writing also rounds up 62$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 63 64truncate --size=65537 "$TEST_IMG" # so we resize it and check again 65$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 66 67# success, all done 68echo '*** done' 69rm -f $seq.full 70status=0 71