#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2010 IBM Corporation. All Rights Reserved.
#
# FS QA Test No. 228
#
# Check if fallocate respects RLIMIT_FSIZE
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

_cleanup()
{
	cd /
	rm -f $tmp.*
	sysctl -w kernel.core_pattern="$core_pattern" &>/dev/null
	ulimit -c $ulimit_c
}

here=`pwd`
tmp=$TEST_DIR/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15 25

# get standard environment, filters and checks
. ./common/rc

# real QA test starts here
# generic, but xfs_io's fallocate must work
_supported_fs generic
# only Linux supports fallocate
_require_test

[ -n "$XFS_IO_PROG" ] || _notrun "xfs_io executable not found"

rm -f $seqres.full

# Sanity check to see if fallocate works
_require_xfs_io_command "falloc"

# Check if we have good enough space available
avail=`df -P $TEST_DIR | awk 'END {print $4}'`
[ "$avail" -ge 104000 ] || _notrun "Test device is too small ($avail KiB)"

# Suppress core dumped messages
core_pattern=`sysctl -n kernel.core_pattern`
ulimit_c=`ulimit -c`
sysctl -w kernel.core_pattern=core &>/dev/null
ulimit -c 0

# Set the FSIZE ulimit to 100MB and check
ulimit -f 102400
flim=`ulimit -f`
[ "$flim" != "unlimited" ] || _notrun "Unable to set FSIZE ulimit"
[ "$flim" -eq 102400 ] || _notrun "FSIZE ulimit is not correct (100 MB)"

echo "File size limit is now set to 100 MB."
echo "Let us try to preallocate 101 MB. This should fail."
$XFS_IO_PROG -f -c 'falloc 0 101m' $TEST_DIR/ouch
rm -f $TEST_DIR/ouch

echo "Let us now try to preallocate 50 MB. This should succeed."
$XFS_IO_PROG -f -c 'falloc 0 50m' $TEST_DIR/ouch
rm -f $TEST_DIR/ouch

echo "Test over."
# success, all done
status=0
exit