#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test No. xfs/015
#
# Make sure inodes can be allocated in new space added by xfs_growfs
#
# Regression test for
# xfs: allow inode allocations in post-growfs disk space
#
. ./common/preamble
_begin_fstest auto enospc growfs

create_file()
{
	local dir=$1
	local i=0
	local in_growfs=false

	# keep running until failed after growfs
	while true; do
		[ -f $tmp.growfs ] && in_growfs=true
		while echo -n >$dir/testfile_$i; do
			let i=$i+1
		done
		$in_growfs && break
		usleep 1000
	done
}

# Import common functions.
. ./common/filter

# real QA test starts here
_supported_fs xfs

_require_scratch

# need 128M space, don't make any assumption
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
_require_fs_space $SCRATCH_MNT 131072
_scratch_unmount

_scratch_mkfs_sized $((32 * 1024 * 1024)) > $tmp.mkfs.raw
cat $tmp.mkfs.raw | _filter_mkfs >$seqres.full 2>$tmp.mkfs
# get original data blocks number and agcount
. $tmp.mkfs
_scratch_mount

nr_worker=$((agcount * 2))
echo "Fork $nr_worker workers to consume free inodes in background" >>$seqres.full
(
	i=0
	while [ $i -lt $nr_worker ]; do
		mkdir $SCRATCH_MNT/testdir_$i
		create_file $SCRATCH_MNT/testdir_$i &
		let i=$i+1
	done
	wait
) >/dev/null 2>&1 &

# Grow fs at the same time, at least x4
# doubling or tripling the size couldn't reproduce
echo "Grow fs to $((dblocks * 4)) blocks" >>$seqres.full
$XFS_GROWFS_PROG -D $((dblocks * 4)) $SCRATCH_MNT >>$seqres.full

# mark xfs_growfs finished to create_file
touch $tmp.growfs

# Wait for background create_file to hit ENOSPC
wait

# log inode status in $seqres.full for debug purpose
echo "Inode status after growing fs" >>$seqres.full
$DF_PROG -i $SCRATCH_MNT >>$seqres.full

# inode should be at least 99% used
total_inode=`_get_total_inode $SCRATCH_MNT`
used_inode=`_get_used_inode $SCRATCH_MNT`
_within_tolerance "used inodes" $used_inode $total_inode %1 -v

status=$?
exit