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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2017 Chengguang Xu <cgxu519@icloud.com>
#
# FS QA Test 474
#
# Inspired by syncfs bug of overlayfs which does not sync dirty inodes in
# underlying filesystem.
#
# Create a small file then run syncfs and shutdown filesystem(or underlying
# filesystem of overlayfs) to check syncfs result.
#
# Test will be skipped if filesystem(or underlying filesystem of overlayfs)
# does not support shutdown.
#
. ./common/preamble
_begin_fstest auto quick shutdown metadata
status=0
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs generic
_require_fssum
_require_scratch
_require_scratch_shutdown
_require_xfs_io_command "syncfs"
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
# Background writeback will flush dirty inode by dirty ratio and dirty time
# period(default 30 seconds), in order to avoid interference from it,
# run sync before test to make all dirty inodes clean, and it also
# accelerates syncfs on testing filesystem so that test case can finish
# in 30 seconds.
sync
# Large fs has a huge size .use_space file, will take long time on running
# fssum $SCRATCH_MNT. So change the target path to a sub-dir of $SCRATCH_MNT.
localdir=$SCRATCH_MNT/dir
mkdir $localdir
$XFS_IO_PROG -f -c "pwrite 0 4K" $localdir/testfile >/dev/null 2>&1
# fssum used for comparing checksum of test file(data & metedata),
# exclude checking about atime, block structure, open error.
$FSSUM_PROG -ugomAcdES -f -w $tmp.fssum $localdir
$XFS_IO_PROG -c "syncfs" $localdir/testfile >/dev/null 2>&1
_scratch_shutdown
_scratch_cycle_mount
$FSSUM_PROG -r $tmp.fssum $localdir
exit
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