#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test No. 519
#
# Verify if there's physical address overlap returned by FIBMAP, cover:
# 79b3dbe4adb3 fs: fix iomap_bmap position calculation
#
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
_supported_os Linux
_require_scratch
_require_fibmap
_require_filefrag_options "es"

testfile="$SCRATCH_MNT/$seq-testfile"

# Use filefrag -B option to force the use of the older FIBMAP ioctl instead of
# the FIEMAP ioctl. Then verify if there's map overlap.
verify_filefrag()
{
	local n=1

	# record details in .full file
	${FILEFRAG_PROG} -Bes -v $testfile >> $seqres.full

	# Due to physical things can't be golden image, so only output logical
	# information at here
	${FILEFRAG_PROG} -Be $testfile | _filter_filefrag | \
		cut -d# -f1-2 > $tmp.filefrag

	# Verify there's not physical address overlay
	for i in `cat $tmp.filefrag`; do
		# Get the start(v1) and end(v2) addresses will be verified
		v1=`sed -n "${n}p" $tmp.filefrag | cut -d# -f1`
		v2=`sed -n "${n}p" $tmp.filefrag | cut -d# -f2`
		# The 2nd value is length, so the real end is:
		v2=$((v1 + v2))

		# Remove the line need to be verified ($i), compare with other
		# lines one by one
		sed -e "${n}d" $tmp.filefrag > $tmp.filefrag.tmp
		for j in `cat $tmp.filefrag.tmp`; do
			# Get 'next' line start(e1) and end(e2) addresses
			e1=`echo $j | cut -d# -f1`
			e2=`echo $j | cut -d# -f2`
			# The 2nd value is length, so the real end is:
			e2=$((e1 + e2))

			# Verify there's not:
			#       [ e1 ... e2 ]
			#             [ v1 ... v2 ]
			# Or:
			#       [ e1 ... e2 ]
			# [ v1 ... v2 ]
			if ! [ ${v1} -ge ${e2} -o ${v2} -le ${e1} ]; then
				echo "find physical addr overlap [$i] vs [$j]"
			fi
		done
		((n++))
	done
}

_scratch_mkfs > $seqres.full 2>&1
_scratch_mount

# Test
echo "== FIBMAP on empty file =="
$XFS_IO_PROG -f -c "truncate 0" $testfile > /dev/null
verify_filefrag

echo "== FIBMAP on sparse file =="
$XFS_IO_PROG -f -t -c "pwrite -S 0xaa 0 1m" \
	     -c "pwrite -S 0xaa 2m 1m" \
	     -c "pwrite -S 0xaa 4m 1m" \
	     $testfile > /dev/null
verify_filefrag

# success, all done
status=0
exit