#!/bin/sh
################################################################################
##                                                                            ##
## Copyright (c) Jan Kara <jack@suse.cz>, 2008                                ##
## Copyright (c) International Business Machines  Corp., 2009                 ##
##                                                                            ##
## 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; either version 2 of the License, or          ##
## (at your option) any later version.                                        ##
##                                                                            ##
## This program is distributed in the hope that it will 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 to the Free Software               ##
## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA    ##
##                                                                            ##
################################################################################
#                                                                             ##
# File :        quota_remount_test01.sh                                       ##
#                                                                             ##
# Description:  Test whether kernel properly supports remounting read-only    ##
#               with quota. This feature was added in kernel 2.6.26. Please   ##
#               see: http://kernelnewbies.org/Linux_2_6_26, and               ##
#               http://git.kernel.org/git/?p=linux/kernel/git/torvalds/       ##
#               linux-2.6.git;a=commit;                                       ##
#               h=0ff5af8340aa6be44220d7237ef4a654314cf795                    ##
#               for more info.                                                ##
#                                                                             ##
# Author:       Jan Kara <jack@suse.cz>,                                      ##
#                                                                             ##
# History:      Sep 18 2008 - Created - Jan Kara <jack@suse.cz>.              ##
#               Feb 17 2009 - Ported to LTP,                                  ##
#                             Subrata Modak <subrata@linux.vnet.ibm.com>      ##
################################################################################

export TCID=quota_remount_test01
export TST_TOTAL=1
export TST_COUNT=0

if [ -z $TMPDIR ]
then
	TMPDIR=/tmp
fi
MNTDIR=$TMPDIR/mnt

if tst_kvcmp -lt "2.6.25"; then
        tst_resm TCONF "Remounting with quotas enabled is not supported!"
        tst_resm TCONF "You should have kernel 2.6.26 and above running....."
        exit 32
fi

if [ ! -d /proc/sys/fs/quota ]; then
        tst_resm TCONF "Quota not supported in kernel!"
        exit 0
fi

if ! command -v quotacheck > /dev/null 2>&1; then
	tst_resm TCONF "'quotacheck' not found"
	exit 0
fi

if ! command -v quotaon > /dev/null 2>&1; then
	tst_resm TCONF "'quotaon' not found"
	exit 0
fi

die()
{
	echo >&2 $2
	umount 2>/dev/null $MNTDIR
	rm 2>/dev/null $IMAGE
	rmdir 2>/dev/null $MNTDIR
        tst_resm TFAIL "Quota on Remount Failed"
	exit $1
}

cd $TMPDIR || die 2 "Cannot cd to $TMPDIR"
IMAGE=ltp-$$-fs-image
dd if=/dev/zero of=$IMAGE bs=4096 count=8000 2>/dev/null || die 2 "Cannot create filesystem image"
mkfs.ext3 -q -F -b 4096 $IMAGE || die 2 "Could not create the filesystem"
mkdir $MNTDIR || die 2 "Could not create the mountpoint"
mount -t ext3 -o loop,usrquota,grpquota $IMAGE $MNTDIR || die 2 "Could not mount the filesystem"
tst_resm TINFO "Successfully mounted the File System"

# some distros (CentOS 6.x, for example) doesn't permit creating
# of quota files in a directory with SELinux file_t type
if [ -x /usr/sbin/selinuxenabled ] && /usr/sbin/selinuxenabled; then
	chcon -t tmp_t $MNTDIR || die 2 "Could not change SELinux file type"
	tst_resm TINFO "Successfully changed SELinux file type"
fi

quotacheck -cug $MNTDIR || die 2 "Could not create quota files"
tst_resm TINFO "Successfully Created Quota Files"

quotaon -ug $MNTDIR || die 2 "Could not turn quota on"
tst_resm TINFO "Successfully Turned on Quota"

echo "blah" >$MNTDIR/file || die 2 "Could not write to the filesystem"
tst_resm TINFO "Successfully wrote to the filesystem"

# Get current quota usage
BLOCKS=`quota  -f $MNTDIR -v -w | tail -n 1 | sed -e 's/ *[^ ]* *\([0-9]*\) .*/\1/'`
mount -o remount,ro $MNTDIR || die 1 "Could not remount read-only"
tst_resm TINFO "Successfully Remounted Read-Only FS"

mount -o remount,rw $MNTDIR || die 2 "Could not remount read-write"
tst_resm TINFO "Successfully Remounted Read-Write FS"

rm $MNTDIR/file
# Get quota usage after removing the file
NEWBLOCKS=`quota  -f $MNTDIR -v -w | tail -n 1 | sed -e 's/ *[^ ]* *\([0-9]*\) .*/\1/'`
# Has quota usage changed properly?
if [ $BLOCKS -eq $NEWBLOCKS ]; then
  die 1 "Usage did not change after remount"
fi
tst_resm TINFO "Usage successfully Changed after Remount"
tst_resm TPASS "Quota on Remount Successfull"

umount $MNTDIR || die 2 "Could not umount $MNTDIR"
rmdir $MNTDIR ||  die 2 "Could not remove $MNTDIR"
rm $IMAGE
exit 0