#!/bin/bash
#
# Test that opening O_DIRECT succeeds when image file I/O produces EIO
#
# Copyright (C) 2015 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# creator
owner=stefanha@redhat.com

seq=`basename $0`
echo "QA output created by $seq"

status=1	# failure is the default!

devname="eiodev$$"
sudo=""

_sudo_qemu_io_wrapper()
{
    (exec $sudo "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@")
}

_setup_eiodev()
{
	# This test should either be run as root or with passwordless sudo
	for cmd in "" "sudo -n"; do
		echo "0 $((1024 * 1024 * 1024 / 512)) error" | \
			$cmd dmsetup create "$devname" 2>/dev/null
		if [ "$?" -eq 0 ]; then
			sudo="$cmd"
			return
		fi
	done
	_notrun "root privileges required to run dmsetup"
}

_cleanup_eiodev()
{
	for cmd in "" "sudo -n"; do
		$cmd dmsetup remove "$devname" 2>/dev/null
		if [ "$?" -eq 0 ]; then
			return
		fi
	done
}

_cleanup()
{
	_cleanup_eiodev
}
trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common.rc
. ./common.filter

_supported_fmt raw
_supported_proto file
_supported_os Linux

_setup_eiodev

TEST_IMG="/dev/mapper/$devname"

echo
echo "== reading from error device =="
# Opening image should succeed but the read operation should fail
_sudo_qemu_io_wrapper --format "$IMGFMT" --nocache \
                      -c "read 0 65536" "$TEST_IMG" \
    | _filter_qemu_io

# success, all done
echo "*** done"
rm -f $seq.full
status=0