##/bin/bash # SPDX-License-Identifier: GPL-2.0 # Copyright (c) 2015 Oracle. All Rights Reserved. # # common functions for setting up and tearing down a dmerror device echo $MOUNT_OPTIONS | grep -q dax if [ $? -eq 0 ]; then _notrun "Cannot run tests with DAX on dmerror devices" fi _dmerror_setup() { local dm_backing_dev=$SCRATCH_DEV local blk_dev_size=`blockdev --getsz $dm_backing_dev` DMERROR_DEV='/dev/mapper/error-test' DMLINEAR_TABLE="0 $blk_dev_size linear $dm_backing_dev 0" DMERROR_TABLE="0 $blk_dev_size error $dm_backing_dev 0" } _dmerror_init() { _dmerror_setup $DMSETUP_PROG remove error-test > /dev/null 2>&1 $DMSETUP_PROG create error-test --table "$DMLINEAR_TABLE" || \ _fatal "failed to create dm linear device" } _dmerror_mount() { _scratch_options mount $MOUNT_PROG -t $FSTYP `_common_dev_mount_options $*` $SCRATCH_OPTIONS \ $DMERROR_DEV $SCRATCH_MNT } _dmerror_unmount() { umount $SCRATCH_MNT } _dmerror_cleanup() { $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1 # wait for device to be fully settled so that 'dmsetup remove' doesn't # fail due to EBUSY $UDEV_SETTLE_PROG >/dev/null 2>&1 $DMSETUP_PROG remove error-test > /dev/null 2>&1 } _dmerror_load_error_table() { suspend_opt="--nolockfs" if [ "$1" = "lockfs" ]; then suspend_opt="" elif [ -n "$*" ]; then suspend_opt="$*" fi $DMSETUP_PROG suspend $suspend_opt error-test [ $? -ne 0 ] && _fail "dmsetup suspend failed" $DMSETUP_PROG load error-test --table "$DMERROR_TABLE" [ $? -ne 0 ] && _fail "dmsetup failed to load error table" $DMSETUP_PROG resume error-test [ $? -ne 0 ] && _fail "dmsetup resume failed" } _dmerror_load_working_table() { suspend_opt="--nolockfs" if [ "$1" = "lockfs" ]; then suspend_opt="" elif [ -n "$*" ]; then suspend_opt="$*" fi $DMSETUP_PROG suspend $suspend_opt error-test [ $? -ne 0 ] && _fail "dmsetup suspend failed" $DMSETUP_PROG load error-test --table "$DMLINEAR_TABLE" [ $? -ne 0 ] && _fail "dmsetup failed to load error table" $DMSETUP_PROG resume error-test [ $? -ne 0 ] && _fail "dmsetup resume failed" }