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##/bin/bash
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2016 Oracle. All Rights Reserved.
#
# Routines for creating huge (fake) disks
_require_dmhugedisk()
{
_require_dm_target zero
_require_dm_target snapshot
}
_dmhugedisk_init()
{
test -z "$1" && _fatal "must specify sector count to _dmhugedisk_init"
local dm_backing_dev=$SCRATCH_DEV
local chunk_size="$2"
if [ -z "$chunk_size" ]; then
chunk_size=512
fi
_dmsetup_remove huge-test
_dmsetup_remove huge-test-zero
local blk_dev_size=$1
DMHUGEDISK_ZERO='/dev/mapper/huge-test-zero'
DMHUGEDISK_DEV='/dev/mapper/huge-test'
DMHUGEDISK_ZERO_TABLE="0 $blk_dev_size zero"
DMHUGEDISK_DEV_TABLE="0 $blk_dev_size snapshot $DMHUGEDISK_ZERO $SCRATCH_DEV N $chunk_size"
_dmsetup_create huge-test-zero --table "$DMHUGEDISK_ZERO_TABLE" || \
_fatal "failed to create dm huge zero device"
_dmsetup_create huge-test --table "$DMHUGEDISK_DEV_TABLE" || \
_fatal "failed to create dm huge device"
}
_dmhugedisk_cleanup()
{
$UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
_dmsetup_remove huge-test
_dmsetup_remove huge-test-zero
}
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