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|
##/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()
{
# Scratch device
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"
# Realtime device
if [ -n "$SCRATCH_RTDEV" ]; then
if [ -z "$NON_FLAKEY_RTDEV" ]; then
# Set up the device switch
local backing_dev="$SCRATCH_RTDEV"
export NON_FLAKEY_RTDEV="$SCRATCH_RTDEV"
SCRATCH_RTDEV=/dev/mapper/flakey-rttest
else
# Already set up; recreate tables
local backing_dev="$NON_FLAKEY_RTDEV"
fi
local BLK_DEV_SIZE=`blockdev --getsz $backing_dev`
FLAKEY_RTTABLE="0 $BLK_DEV_SIZE flakey $backing_dev 0 180 0"
FLAKEY_RTTABLE_DROP="0 $BLK_DEV_SIZE flakey $backing_dev 0 0 180 1 drop_writes"
FLAKEY_RTTABLE_ERROR="0 $BLK_DEV_SIZE flakey $backing_dev 0 0 180 1 error_writes"
_dmsetup_create flakey-rttest --table "$FLAKEY_RTTABLE" || \
_fatal "failed to create flakey rt device"
fi
# External log device
if [ -n "$SCRATCH_LOGDEV" ]; then
if [ -z "$NON_FLAKEY_LOGDEV" ]; then
# Set up the device switch
local backing_dev="$SCRATCH_LOGDEV"
export NON_FLAKEY_LOGDEV="$SCRATCH_LOGDEV"
SCRATCH_LOGDEV=/dev/mapper/flakey-logtest
else
# Already set up; recreate tables
local backing_dev="$NON_FLAKEY_LOGDEV"
fi
local BLK_DEV_SIZE=`blockdev --getsz $backing_dev`
FLAKEY_LOGTABLE="0 $BLK_DEV_SIZE flakey $backing_dev 0 180 0"
FLAKEY_LOGTABLE_DROP="0 $BLK_DEV_SIZE flakey $backing_dev 0 0 180 1 drop_writes"
FLAKEY_LOGTABLE_ERROR="0 $BLK_DEV_SIZE flakey $backing_dev 0 0 180 1 error_writes"
_dmsetup_create flakey-logtest --table "$FLAKEY_LOGTABLE" || \
_fatal "failed to create flakey log device"
fi
}
_mount_flakey()
{
_scratch_options mount
mount -t $FSTYP $SCRATCH_OPTIONS $MOUNT_OPTIONS $FLAKEY_DEV $SCRATCH_MNT
}
_unmount_flakey()
{
$UMOUNT_PROG $SCRATCH_MNT
}
_cleanup_flakey()
{
# If dmsetup load fails then we need to make sure to do resume here
# otherwise the umount will hang
test -n "$NON_FLAKEY_LOGDEV" && $DMSETUP_PROG resume flakey-logtest &> /dev/null
test -n "$NON_FLAKEY_RTDEV" && $DMSETUP_PROG resume flakey-rttest &> /dev/null
$DMSETUP_PROG resume flakey-test > /dev/null 2>&1
$UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
_dmsetup_remove flakey-test
test -n "$NON_FLAKEY_LOGDEV" && _dmsetup_remove flakey-logtest
test -n "$NON_FLAKEY_RTDEV" && _dmsetup_remove flakey-rttest
if [ -n "$NON_FLAKEY_LOGDEV" ]; then
SCRATCH_LOGDEV="$NON_FLAKEY_LOGDEV"
unset NON_FLAKEY_LOGDEV
fi
if [ -n "$NON_FLAKEY_RTDEV" ]; then
SCRATCH_RTDEV="$NON_FLAKEY_RTDEV"
unset NON_FLAKEY_RTDEV
fi
}
# _load_flakey_table <table> [lockfs]
#
# This defaults to --nolockfs, which doesn't freeze_fs() before loading the new
# table, so it simulates power failure.
_load_flakey_table()
{
case "$1" in
"$FLAKEY_DROP_WRITES")
table="$FLAKEY_TABLE_DROP"
logtable="$FLAKEY_LOGTABLE_DROP"
rttable="$FLAKEY_RTTABLE_DROP"
;;
"$FLAKEY_ERROR_WRITES")
table="$FLAKEY_TABLE_ERROR"
logtable="$FLAKEY_LOGTABLE_ERROR"
rttable="$FLAKEY_RTTABLE_ERROR"
;;
*)
table="$FLAKEY_TABLE"
logtable="$FLAKEY_LOGTABLE"
rttable="$FLAKEY_RTTABLE"
;;
esac
suspend_opt="--nolockfs"
[ $# -gt 1 ] && [ $2 -eq 1 ] && suspend_opt=""
# Suspend the scratch device before the log and realtime devices so
# that the kernel can freeze and flush the filesystem if the caller
# wanted a freeze.
$DMSETUP_PROG suspend $suspend_opt flakey-test
[ $? -ne 0 ] && _fatal "failed to suspend flakey-test"
if [ -n "$NON_FLAKEY_RTDEV" ]; then
$DMSETUP_PROG suspend $suspend_opt flakey-rttest
[ $? -ne 0 ] && _fatal "failed to suspend flakey-rttest"
fi
if [ -n "$NON_FLAKEY_LOGDEV" ]; then
$DMSETUP_PROG suspend $suspend_opt flakey-logtest
[ $? -ne 0 ] && _fatal "failed to suspend flakey-logtest"
fi
# There may be multiple dm targets in the table, and these dm targets
# will be joined by the newline ("\n"). Option --table can not cope with
# the multiple-targets case, so get them by reading from standard input.
echo -e "$table" | $DMSETUP_PROG load flakey-test
[ $? -ne 0 ] && _fatal "failed to load table into flakey-test"
if [ -n "$NON_FLAKEY_RTDEV" ]; then
echo -e "$rttable" | $DMSETUP_PROG load flakey-rttest
[ $? -ne 0 ] && _fatal "failed to load table into flakey-rttest"
fi
if [ -n "$NON_FLAKEY_LOGDEV" ]; then
echo -e "$logtable" | $DMSETUP_PROG load flakey-logtest
[ $? -ne 0 ] && _fatal "failed to load table into flakey-logtest"
fi
# Resume devices in the opposite order that we suspended them.
if [ -n "$NON_FLAKEY_LOGDEV" ]; then
$DMSETUP_PROG resume flakey-logtest
[ $? -ne 0 ] && _fatal "failed to resume flakey-logtest"
fi
if [ -n "$NON_FLAKEY_RTDEV" ]; then
$DMSETUP_PROG resume flakey-rttest
[ $? -ne 0 ] && _fatal "failed to resume flakey-rttest"
fi
$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
}
|
