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##/bin/bash
#
# Copyright (c) 2012 Red Hat, Inc
# All Rights Reserved.
#
# Written by Eric Sandeen <sandeen@redhat.com>
#
# 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.
#
# This program is distributed in the hope that it would 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, write the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#
# Functions useful for tests on unique block devices
#
_require_scsi_debug()
{
# make sure we have the module and it's not already used
modinfo scsi_debug 2>&1 > /dev/null || _notrun "scsi_debug module not found"
lsmod | grep -wq scsi_debug && (rmmod scsi_debug || _notrun "scsi_debug module in use")
# make sure it has the features we need
# logical/physical sectors plus unmap support all went in together
modinfo scsi_debug | grep -wq sector_size || _notrun "scsi_debug too old"
}
# Args: [physical sector size, [logical sector size, [unaligned(0|1), [size in megs]]]]
_get_scsi_debug_dev()
{
# Defaults to phys 512, logical 512, aligned
physical=${1-512}
logical=${2-512}
unaligned=${3-0}
size=${4-128}
phys_exp=0
while [ $logical -lt $physical ]; do
let physical=physical/2
let phys_exp=phys_exp+1
done
opts="sector_size=$logical physblk_exp=$phys_exp lowest_aligned=$unaligned dev_size_mb=$size"
echo "scsi_debug options $opts" >> $RESULT_DIR/$seq.full
modprobe scsi_debug $opts
[ $? -eq 0 ] || _fail "scsi_debug modprobe failed"
sleep 1
device=`grep -wl scsi_debug /sys/block/sd*/device/model | awk -F / '{print $4}'`
echo "/dev/$device"
}
_put_scsi_debug_dev()
{
sleep 1
lsmod | grep -wq scsi_debug || return
rmmod scsi_debug || _fail "Could not remove scsi_debug module"
}
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