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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2020 Facebook. All Rights Reserved.
#
# common functions for setting up and tearing down a dmdust device
_init_dust()
{
local DEV_SIZE=`blockdev --getsz $SCRATCH_DEV`
DUST_DEV=/dev/mapper/dust-test
DUST_TABLE="0 $DEV_SIZE dust $SCRATCH_DEV 0 512"
_dmsetup_create dust-test --table "$DUST_TABLE" || \
_fatal "failed to create dust device"
}
_mount_dust()
{
_scratch_options mount
_mount -t $FSTYP `_common_dev_mount_options $*` $SCRATCH_OPTIONS \
$DUST_DEV $SCRATCH_MNT
}
_unmount_dust()
{
$UMOUNT_PROG $SCRATCH_MNT
}
_cleanup_dust()
{
# If dmsetup load fails then we need to make sure to do resume here
# otherwise the umount will hang
$DMSETUP_PROG resume dust-test > /dev/null 2>&1
$UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
_dmsetup_remove dust-test
}
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