#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2021 Huawei.  All Rights Reserved.
#
# FS QA Test 049
#
# Regression test for kernel commit a149d2a5cabb (ext4: fix check to prevent
# false positive report of incorrect used inodes)
#
. ./common/preamble
_begin_fstest auto quick

# Import common functions.
. ./common/filter

# real QA test starts here
_supported_fs ext4
_require_scratch

sdev=$(_short_dev ${SCRATCH_DEV})
# default sleep interval
sleep_time=5

echo "+ create scratch fs"
_scratch_mkfs_ext4 -b 4096 -g 8192 -N 1024 -I 4096 >> $seqres.full 2>&1

echo "+ mount fs"
_scratch_mount -o errors=remount-ro
# The default maximum wake-up delay of the lazy init thread of ext4 is
# EXT4_DEF_LI_MAX_START_DELAY (5s).
# After mounting the file system, the lazy init thread will be awakened to
# perform group initialization at 0~5s after the current time. If an error
# is detected during the initialization process, it will be set to read-only,
# so the test case needs to delay a little while waiting for the init thread
# to execute.
sleep $sleep_time

echo "+ check mountpoint status"
cat /proc/self/mounts | grep -w ${SCRATCH_MNT} | \
    $AWK_PROG '{print $4}' | grep -oE '^rw,' | tee -a $seqres.full

echo "+ check mountpoint writability"
test -w $SCRATCH_MNT || echo "scratch mount should still be writable"

echo "+ check dmesg"
_check_dmesg_for "\(${sdev}\): Remounting filesystem read-only" && \
    echo "scratch dev should not be remounted to read-only"

# success, all done
status=0
exit