#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 245
#
# Make sure that reflink deals with extents going beyond EOF.
# - fallocate 256k in file1
# - pwrite 252-257k to cause it to speculatively prealloc file1
# - reflink file1 to file2
# - compare file[12]
#
. ./common/preamble
_begin_fstest auto quick clone prealloc

# Import common functions.
. ./common/filter
. ./common/reflink

# real QA test starts here
_supported_fs xfs
_require_xfs_debug
_require_scratch_reflink
_require_xfs_io_command "falloc"
_require_xfs_io_command "bmap" "-c"
_require_cp_reflink

echo "Format and mount"
_scratch_mkfs > $seqres.full 2>&1
_scratch_mount >> $seqres.full 2>&1

testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir

echo "Create the original files"
$XFS_IO_PROG -f -c "falloc 0 256k" -c "pwrite 252k 6k" $testdir/file1 >> $seqres.full
_scratch_cycle_mount
_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full

echo "Compare files"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file2 | _filter_scratch

echo "Unwritten data extents"
test $(_xfs_bmapx_find data $testdir/file1 -E '1[01]{4}$') -gt 0 || \
	echo "Expected to find an unwritten file1 extent"
echo "Shared data extents"
test $(_xfs_bmapx_find data $testdir/file1 -E '10[01]{4}$') -gt 0 || \
	echo "Expected to find a shared data extent"

echo "Hole data extents"
test $(_xfs_bmapx_find data $testdir/file2 'hole') -gt 0 || \
	echo "Expected to find a hole data extent"
echo "Shared data extents"
test $(_xfs_bmapx_find data $testdir/file2 -E '10[01]{4}$') -gt 0 || \
	echo "Expected to find a shared data extent"

echo "Hole cow extents"
test $(_xfs_bmapx_find cow $testdir/file1 'hole') -gt 0 || \
	echo "Expected to find a hole cow extent"
echo "Hole cow extents"
test $(_xfs_bmapx_find cow $testdir/file2 'hole') -gt 0 || \
	echo "Expected to find a hole cow extent"

# success, all done
status=0
exit