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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2022 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test 259
#
# Make sure btrfs defrag ioctl won't defrag compressed extents which are already
# at their max capacity.
#
. ./common/preamble
_begin_fstest auto quick defrag fiemap compress
. ./common/filter
_supported_fs btrfs
_require_scratch
_require_xfs_io_command "fiemap"
_scratch_mkfs >> $seqres.full
_scratch_mount -o compress
# Btrfs uses 128K as max extent size for compressed extents, this would result
# several compressed extents all at their max size
$XFS_IO_PROG -f -c "pwrite -S 0xee 0 16m" -c sync \
$SCRATCH_MNT/foobar >> $seqres.full
old_csum=$(_md5_checksum $SCRATCH_MNT/foobar)
echo "=== File extent layout before defrag ===" >> $seqres.full
$XFS_IO_PROG -c "fiemap -v" "$SCRATCH_MNT/foobar" >> $seqres.full
$XFS_IO_PROG -c "fiemap -v" "$SCRATCH_MNT/foobar" > $tmp.before
$BTRFS_UTIL_PROG filesystem defrag "$SCRATCH_MNT/foobar" >> $seqres.full
sync
new_csum=$(_md5_checksum $SCRATCH_MNT/foobar)
echo "=== File extent layout after defrag ===" >> $seqres.full
$XFS_IO_PROG -c "fiemap -v" "$SCRATCH_MNT/foobar" >> $seqres.full
$XFS_IO_PROG -c "fiemap -v" "$SCRATCH_MNT/foobar" > $tmp.after
if [ $new_csum != $old_csum ]; then
echo "file content changed"
fi
diff -q $tmp.before $tmp.after || echo "compressed extents get defragged"
echo "Silence is golden"
# success, all done
status=0
exit
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