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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2019, Oracle and/or its affiliates. All Rights Reserved.
#
# FS QA Test No. 543
#
# Ensuring that reflinking works when the source range covers multiple
# extents, some unwritten, some not:
#
# - Create a file with the following repeating sequence of blocks:
# 1. reflinked
# 2. unwritten
# 3. hole
# 4. regular block
# 5. delalloc
# - reflink across the halfway mark, starting with the unwritten extent.
# - Check that the files are now different where we say they're different.
#
. ./common/preamble
_begin_fstest auto quick clone fiemap prealloc
# Import common functions.
. ./common/filter
. ./common/reflink
# real QA test starts here
_supported_fs generic
_require_scratch_reflink
_require_scratch_delalloc
_require_xfs_io_command "falloc"
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"
blksz=65536
_require_congruent_file_oplen $SCRATCH_MNT $blksz
nr=64
filesize=$((blksz * nr))
_pwrite_byte 0x64 0 $((blksz * nr)) $testdir/file2 >> $seqres.full
_pwrite_byte 0x64 0 $((blksz * nr)) $testdir/file2.chk >> $seqres.full
_weave_reflink_rainbow $blksz $nr $testdir/file1 $testdir/file3 >> $seqres.full
_scratch_cycle_mount
echo "Compare files"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file2 | _filter_scratch
md5sum $testdir/file2.chk | _filter_scratch
md5sum $testdir/file3 | _filter_scratch
md5sum $testdir/file3.chk | _filter_scratch
echo "reflink across the transition"
soff=$((filesize / 4))
doff=$((filesize / 2))
rsz=$((filesize / 2))
_weave_reflink_rainbow_delalloc $blksz $nr $testdir/file3 >> $seqres.full
# now reflink the rainbow
echo "before reflink" >> $seqres.full
$FILEFRAG_PROG -v $testdir/file2 >> $seqres.full 2>&1
$FILEFRAG_PROG -v $testdir/file3 >> $seqres.full 2>&1
$XFS_IO_PROG -f -c "reflink $testdir/file3 $soff $doff $rsz" $testdir/file2 >> $seqres.full
$XFS_IO_PROG -c "truncate $doff" $testdir/file2.chk
dd if=$testdir/file3.chk skip=$((soff / blksz)) count=$((rsz / blksz)) bs=$blksz >> $testdir/file2.chk 2> /dev/null
_scratch_cycle_mount
echo "Compare files"
echo "after reflink" >> $seqres.full
$FILEFRAG_PROG -v $testdir/file2 >> $seqres.full 2>&1
$FILEFRAG_PROG -v $testdir/file3 >> $seqres.full 2>&1
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file2 | _filter_scratch
md5sum $testdir/file2.chk | _filter_scratch
md5sum $testdir/file3 | _filter_scratch
md5sum $testdir/file3.chk | _filter_scratch
# success, all done
status=0
exit
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