| #! /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 |
| |
| _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 |
