1#!/usr/bin/env bash 2# group: rw auto backing quick 3# 4# Test bdrv_pread/bdrv_pwrite using BDRV_O_SNAPSHOT 5# 6# Copyright (C) 2013 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 22# creator 23owner=stefanha@redhat.com 24 25seq=`basename $0` 26echo "QA output created by $seq" 27 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33} 34trap "_cleanup; exit \$status" 0 1 2 3 15 35 36# get standard environment, filters and checks 37. ./common.rc 38. ./common.filter 39 40_supported_fmt generic 41_supported_proto file 42 43# Don't do O_DIRECT on tmpfs 44_supported_cache_modes writeback writethrough unsafe 45 46size=128M 47_make_test_img $size 48 49echo 50echo "== initializing whole image ==" 51$QEMU_IO -c "write -z 0 $size" "$TEST_IMG" | _filter_qemu_io 52 53echo 54echo "== reading whole image ==" 55$QEMU_IO -s -c "read 0 $size" "$TEST_IMG" | _filter_qemu_io 56 57echo 58echo "== writing whole image does not modify image ==" 59$QEMU_IO -s -c "write -P 0xa 0 $size" "$TEST_IMG" | _filter_qemu_io 60$QEMU_IO -c "read -P 0 0 $size" "$TEST_IMG" | _filter_qemu_io 61 62# success, all done 63echo "*** done" 64rm -f $seq.full 65status=0 66