#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 SUSE Linux Products GmbH.  All Rights Reserved.
#
# FS QA Test 482
#
# Test filesystem consistency after each FUA operation
#
# Will do log replay and check the filesystem.
#
. ./common/preamble
_begin_fstest auto metadata replay thin recoveryloop

# Override the default cleanup function.
#
# If debugging logwrites failures using the tools/dm-logwrite-replay script,
# switch the cleanup function to the version that is commented out below so that
# failure leaves the corpse intact for post-mortem failure analysis.
_cleanup()
{
	cd /
	$KILLALL_PROG -KILL -q $FSSTRESS_PROG &> /dev/null
	_log_writes_cleanup &> /dev/null
	_dmthin_cleanup
	rm -f $tmp.*
}

# tools/dm-logwrite-replay _cleanup version
#_cleanup()
#{
#	cd /
#	$KILLALL_PROG -KILL -q $FSSTRESS_PROG &> /dev/null
#	if [ $status -eq 0 ]; then
#		_log_writes_cleanup &> /dev/null
#		_dmthin_cleanup
#	else
#		echo dm-thinvol-dev: $DMTHIN_VOL_DEV >> $seqres.full
#	fi
#	rm -f $tmp.*
#}

# Import common functions.
. ./common/filter
. ./common/dmthin
. ./common/dmlogwrites

# real QA test starts here

# Modify as appropriate.
_supported_fs generic

_require_no_logdev
_require_command "$KILLALL_PROG" killall
# Use thin device as replay device, which requires $SCRATCH_DEV
_require_scratch_nocheck
# and we need extra device as log device
_require_log_writes
_require_dm_target thin-pool

nr_cpus=$("$here/src/feature" -o)
# cap nr_cpus to 8 to avoid spending too much time on hosts with many cpus
if [ $nr_cpus -gt 8 ]; then
	nr_cpus=8
fi
fsstress_args=$(_scale_fsstress_args -w -d $SCRATCH_MNT -n 512 -p $nr_cpus \
		$FSSTRESS_AVOID)

size=$(_small_fs_size_mb 200)           # 200m phys/virt size
devsize=$((1024*1024*size / 512))
csize=$((1024*64 / 512))		# 64k cluster size
lowspace=$((1024*1024 / 512))		# 1m low space threshold

# Use a thin device to provide deterministic discard behavior. Discards are used
# by the log replay tool for fast zeroing to prevent out-of-order replay issues.
_test_unmount
_dmthin_init $devsize $devsize $csize $lowspace
_log_writes_init $DMTHIN_VOL_DEV
_log_writes_mkfs >> $seqres.full 2>&1
_log_writes_mark mkfs

_log_writes_mount
run_check $FSSTRESS_PROG $fsstress_args > /dev/null 2>&1
_log_writes_unmount

_log_writes_remove
prev=$(_log_writes_mark_to_entry_number mkfs)
[ -z "$prev" ] && _fail "failed to locate entry mark 'mkfs'"
cur=$(_log_writes_find_next_fua $prev)
[ -z "$cur" ] && _fail "failed to locate next FUA write"

if [ "$FSTYP" = "bcachefs" ]; then
    _dmthin_cleanup
    _dmthin_init $devsize $devsize $csize $lowspace
fi

while [ ! -z "$cur" ]; do
	_log_writes_replay_log_range $cur $DMTHIN_VOL_DEV >> $seqres.full

	if [ "$FSTYP" = "bcachefs" ]; then
	    # bcachefs will get confused if fsck does writes to replay the log,
	    # but then we replay writes from an earlier point in time on the
	    # same fs - but  fsck in -n mode won't do any writes:
	    _check_generic_filesystem -n $DMTHIN_VOL_DEV
	else
	    # Here we need extra mount to replay the log, mainly for journal based
	    # fs, as their fsck will report dirty log as error.
	    # We don't care to preserve any data on the replay dev, as we can replay
	    # back to the point we need, and in fact sometimes creating/deleting
	    # snapshots repeatedly can be slower than replaying the log.

	    _dmthin_mount
	    _dmthin_check_fs
	fi

	prev=$cur
	cur=$(_log_writes_find_next_fua $(($cur + 1)))
	[ -z "$cur" ] && break
done

echo "Silence is golden"

# success, all done
status=0
exit