#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Red Hat Inc.  All Rights Reserved.
#
# FS QA Test No. generic/558
#
# Stress test fs by using up all inodes and check fs.
#
# Also a regression test for xfsprogs commit
# d586858 xfs_repair: fix sibling pointer tests in verify_dir2_path()
#
. ./common/preamble
_begin_fstest auto enospc

create_file()
{
	local dir=$1
	local nr_file=$2
	local prefix=$3
	local i=0

	for ((i = 0; i < nr_file; i++)); do
		echo -n > $dir/${prefix}_${i}
	done
}

# Import common functions.
. ./common/filter

# real QA test starts here
_supported_fs generic
_require_inode_limits
_require_scratch

echo "Silence is golden"

_scratch_mkfs_sized $((1024 * 1024 * 1024)) >>$seqres.full 2>&1
_scratch_mount

i=0
free_inodes=$(_get_free_inode $SCRATCH_MNT)
# Round the number of inodes to create up to the nearest 1000, like the old
# code did to make sure that we *cannot* allocate any more inodes at all.
free_inodes=$(( ( (free_inodes + 999) / 1000) * 1000 ))
nr_cpus=$(( $($here/src/feature -o) * 4 * LOAD_FACTOR ))
echo "free inodes: $free_inodes nr_cpus: $nr_cpus" >> $seqres.full

if ((free_inodes <= nr_cpus)); then
	nr_cpus=1
	files_per_dir=$free_inodes
else
	files_per_dir=$(( (free_inodes + nr_cpus - 1) / nr_cpus ))
fi
mkdir -p $SCRATCH_MNT/testdir
echo "nr_cpus: $nr_cpus files_per_dir: $files_per_dir" >> $seqres.full

echo "Create $((nr_cpus * files_per_dir)) files in $SCRATCH_MNT/testdir" >>$seqres.full
for ((i = 0; i < nr_cpus; i++)); do
	create_file $SCRATCH_MNT/testdir $files_per_dir $i >>$seqres.full 2>&1 &
done
wait

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

_check_scratch_fs

# Check again after removing all the files
rm -rf $SCRATCH_MNT/testdir
echo "Inode status after deleting all test files" >>$seqres.full
$DF_PROG -i $SCRATCH_MNT >>$seqres.full

status=0
exit