##/bin/bash # SPDX-License-Identifier: GPL-2.0 # Copyright (c) 2013 Fusion IO, Inc. All Rights Reserved. # # common functions for setting up and tearing down a dmflakey device FLAKEY_ALLOW_WRITES=0 FLAKEY_DROP_WRITES=1 FLAKEY_ERROR_WRITES=2 _init_flakey() { local BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV` FLAKEY_DEV=/dev/mapper/flakey-test FLAKEY_TABLE="0 $BLK_DEV_SIZE flakey $SCRATCH_DEV 0 180 0" FLAKEY_TABLE_DROP="0 $BLK_DEV_SIZE flakey $SCRATCH_DEV 0 0 180 1 drop_writes" FLAKEY_TABLE_ERROR="0 $BLK_DEV_SIZE flakey $SCRATCH_DEV 0 0 180 1 error_writes" _dmsetup_create flakey-test --table "$FLAKEY_TABLE" || \ _fatal "failed to create flakey device" } _mount_flakey() { _scratch_options mount mount -t $FSTYP $SCRATCH_OPTIONS $MOUNT_OPTIONS $FLAKEY_DEV $SCRATCH_MNT } _unmount_flakey() { $UMOUNT_PROG $SCRATCH_MNT } _cleanup_flakey() { # If dmsetup load fails then we need to make sure to do resume here # otherwise the umount will hang $DMSETUP_PROG resume flakey-test > /dev/null 2>&1 $UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1 _dmsetup_remove flakey-test } # _load_flakey_table [lockfs] # # This defaults to --nolockfs, which doesn't freeze_fs() before loading the new # table, so it simulates power failure. _load_flakey_table() { table="$FLAKEY_TABLE" [ $1 -eq $FLAKEY_DROP_WRITES ] && table="$FLAKEY_TABLE_DROP" [ $1 -eq $FLAKEY_ERROR_WRITES ] && table="$FLAKEY_TABLE_ERROR" suspend_opt="--nolockfs" [ $# -gt 1 ] && [ $2 -eq 1 ] && suspend_opt="" $DMSETUP_PROG suspend $suspend_opt flakey-test [ $? -ne 0 ] && _fatal "failed to suspend flakey-test" # There may be multiple dm targets in the table, and these dm targets # will be joined by the newline ("\n"). Option --table can not cope with # the multiple-targets case, so get them by reading from standard input. echo -e "$table" | $DMSETUP_PROG load flakey-test [ $? -ne 0 ] && _fatal "failed to load table into flakey-test" $DMSETUP_PROG resume flakey-test [ $? -ne 0 ] && _fatal "failed to resume flakey-test" } # Silently drop all writes and unmount/remount to simulate a crash/power # failure. _flakey_drop_and_remount() { _load_flakey_table $FLAKEY_DROP_WRITES _unmount_flakey if [ "x$1" = "xyes" ]; then _check_scratch_fs $FLAKEY_DEV fi _load_flakey_table $FLAKEY_ALLOW_WRITES _mount_flakey } _require_flakey_with_error_writes() { local SIZE local TABLE local NAME=flakey-test _require_dm_target flakey SIZE=`blockdev --getsz $SCRATCH_DEV` TABLE="0 $SIZE flakey $SCRATCH_DEV 0 0 180 1 error_writes" _dmsetup_create $NAME --table "$TABLE" || \ _notrun "This test requires error_writes feature in dm-flakey" _cleanup_flakey }