#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Huawei.  All Rights Reserved.
#
# FS QA Test 468
#
# This testcase is a fallocate variant of generic/392, it expands to test
# block preallocation functionality of fallocate.
# In this case, we are trying to execute:
# 1. fallocate {,-k}
# 2. f{data,}sync
# 3. power-cuts
# 4. recovery filesystem during mount
# 5. check inode's metadata
#
# In the case of fsync, filesystem should recover all the inode metadata, while
# recovering i_blocks and i_size at least for fdatasync, so this testcase excepts
# that inode metadata will be unchanged after recovery.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	cd /
	rm -f $tmp.*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here
_supported_fs generic

_require_scratch
_require_scratch_shutdown
_require_xfs_io_command "falloc" "-k"

_scratch_mkfs >/dev/null 2>&1
_require_metadata_journaling $SCRATCH_DEV
_scratch_mount

testfile=$SCRATCH_MNT/testfile

# check inode metadata after shutdown
check_inode_metadata()
{
	sync_mode=$1

	# fsync or fdatasync
	if [ "$sync_mode" = "fsync" ]; then
		stat_opt='-c "b: %b s: %s a: %x m: %y c: %z"'
	else
		stat_opt='-c "b: %b s: %s"'
	fi

	before=`stat "$stat_opt" $testfile`

	$XFS_IO_PROG -c "$sync_mode" $testfile | _filter_xfs_io
	_scratch_shutdown | tee -a $seqres.full
	_scratch_cycle_mount

	after=`stat "$stat_opt" $testfile`

	if [ "$before" != "$after" ]; then
		echo "Before: $before"
		echo "After : $after"
	fi
	echo "Before: $before" >> $seqres.full
	echo "After : $after" >> $seqres.full
	rm $testfile
}

# fallocate XX KB with f{data}sync, followed by power-cut
test_falloc()
{
	# 4202496 = 4m + 8k
	echo "==== falloc $2$3 test with $1 ====" | tee -a $seqres.full
	$XFS_IO_PROG -f -c "truncate 4202496"	\
			-c "pwrite 0 4202496"	\
			-c "fsync"		\
			-c "falloc $2 4202496 $3"\
			$testfile >/dev/null
	check_inode_metadata $1
}

for i in fsync fdatasync; do
	test_falloc $i "" 1024
	test_falloc $i "" 4096
	test_falloc $i "" 104857600
	test_falloc $i "-k " 1024
	test_falloc $i "-k " 4096
	test_falloc $i "-k " 104857600
done

status=0
exit