#! /bin/bash
# FS QA Test No. 228
#
# Check if fallocate respects RLIMIT_FSIZE
#
#-----------------------------------------------------------------------
# Copyright (c) 2010 IBM Corporation. All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
#-----------------------------------------------------------------------
#
# creator
owner=aarora@in.ibm.com

seq=`basename $0`
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
_supported_os Linux

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

rm -f $seq.full

# Sanity check to see if fallocate works
_require_xfs_io_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 kernel.core_pattern | awk -F = '{print $NF}'`
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 -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 -f -c 'falloc 0 50m' $TEST_DIR/ouch
rm -f $TEST_DIR/ouch

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