| ##/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 |
| } |