#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 SGI.  All Rights Reserved.
#
# FS QA Test No. 001
#
# Test the xfs_db write of the XFS BMBT entries. For each XFS BMBT field,
# write the value 0, each bit and finally the entry beyond the maximum legal
# value. Also makes sure a core write and hex input still work.
#
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.*
}

_do_bit_test()
{
	field="$1"
	bits="$2"

	echo "testing $field with $bits bits"
	_scratch_xfs_db -x -c "inode $FILE_INO" -c "write $field 0"
	num=1
	for n in `seq 0 1 $bits`; do
		_scratch_xfs_db -x -c "inode $FILE_INO" \
			  -c "write $field $num"
		let num=$num*2
	done
	echo
}

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

# real QA test starts here

# Modify as appropriate.
_supported_fs xfs
_supported_os Linux
_require_scratch_nocheck

_scratch_mkfs >/dev/null 2>&1
_scratch_mount

# create the test file
echo "make a file with data so it has an extent" > $SCRATCH_MNT/file

# find the inode for the test file
FILE_INO=`ls -i $SCRATCH_MNT |awk '{print $1}'`

_scratch_unmount

# test bit length constants
BMBT_EXNTFLAG_BITLEN=1
BMBT_STARTOFF_BITLEN=54
BMBT_STARTBLOCK_BITLEN=52
BMBT_BLOCKCOUNT_BITLEN=21

prefix=$(_scratch_get_bmx_prefix $FILE_INO)
test -n "$prefix" || _fail "could not find bmx prefix from inode $FILE_INO"

filter_output() {
	sed -e "s/${prefix}/u.bmx/g"
}

# test setting the BMBT entries from 0 to past the valid number.
_do_bit_test "${prefix}[0].extentflag" $BMBT_EXNTFLAG_BITLEN | filter_output
_do_bit_test "${prefix}[0].startoff" $BMBT_STARTOFF_BITLEN | filter_output
_do_bit_test "${prefix}[0].startblock" $BMBT_STARTBLOCK_BITLEN | filter_output
_do_bit_test "${prefix}[0].blockcount" $BMBT_BLOCKCOUNT_BITLEN | filter_output
# test setting the 32 bit generation number
_scratch_xfs_db -x -c "inode $FILE_INO" -c "write core.gen 0x5a"
_scratch_xfs_db -x -c "inode $FILE_INO" -c "write core.gen 0xa5"
_scratch_xfs_db -x -c "inode $FILE_INO" -c "write core.gen 0"
_scratch_xfs_db -x -c "inode $FILE_INO" -c "write core.gen #5a5a"
_scratch_xfs_db -x -c "inode $FILE_INO" -c "write core.gen #a5a5"
status=0
exit