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##/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2012 Red Hat, Inc. All Rights Reserved.
#
# Functions useful for tests on unique block devices
. common/module
_require_scsi_debug()
{
local mod_present=0
# make sure we have the module
modinfo scsi_debug 2>&1 > /dev/null || _notrun "scsi_debug module not found"
lsmod | grep -wq scsi_debug
if [[ $? -eq 0 ]]; then
mod_present=1
fi
if [[ $mod_present -eq 1 ]]; then
# We try to remove the module only once if MODPROBE_PATIENT_RM_TIMEOUT_SECONDS
# is set to forever because fstests does not leave modules
# lingering around. If you do have a module lingering around
# and its being used, it wasn't us who started it, so you
# likely would not want to wait forever for it really.
if [[ "$MODPROBE_PATIENT_RM_TIMEOUT_SECONDS" == "forever" ]]; then
rmmod scsi_debug || _notrun "scsi_debug module in use and MODPROBE_PATIENT_RM_TIMEOUT_SECONDS set to forever, removing once failed"
else
_patient_rmmod scsi_debug || _notrun "scsi_debug module in use"
fi
fi
# 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}
test -n "$4" && shift
test -n "$3" && shift
test -n "$2" && shift
test -n "$1" && shift
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" >> $seqres.full
modprobe scsi_debug $opts
[ $? -eq 0 ] || _fail "scsi_debug modprobe failed"
$UDEV_SETTLE_PROG
device=`grep -wl scsi_debug /sys/block/sd*/device/model | awk -F / '{print $4}'`
echo "/dev/$device"
}
_put_scsi_debug_dev()
{
lsmod | grep -wq scsi_debug || return
$UDEV_SETTLE_PROG
_patient_rmmod scsi_debug || _fail "Could not remove scsi_debug module"
}
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