#! /bin/bash
# FS QA Test No. 300
#
# Test xfs_fsr / swapext management of di_forkoff w/ selinux
#
#-----------------------------------------------------------------------
# Copyright (c) 2013 Red Hat, Inc.  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
#-----------------------------------------------------------------------

seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

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

_cleanup()
{
    cd /
    rm -f $tmp.*
}

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

_require_scratch

# real QA test starts here

_supported_fs xfs
_supported_os Linux

getenforce | grep -q "Enforcing\|Permissive" || _notrun "SELinux not enabled"
[ "$XFS_FSR_PROG" = "" ] && _notrun "xfs_fsr not found"

rm -f $seqres.full

_scratch_mkfs_xfs -m crc=0 -i size=256 >> $seqres.full 2>&1 \
			|| _fail "mkfs failed"

# Manually mount to avoid fs-wide context set by default in xfstests
mount $SCRATCH_DEV $SCRATCH_MNT

touch $SCRATCH_MNT/$seq.test

# Create an extents-format attribute on a file
$XFS_IO_PROG -f -c "pwrite -S 0x63 0 4096" $SCRATCH_MNT/attrvals >> $seqres.full 2>&1
cat $SCRATCH_MNT/attrvals | attr -s name $SCRATCH_MNT/$seq.test >> $seqres.full 2>&1

# Fragment the file by writing backwards
for I in `seq 6 -1 0`; do
	dd if=/dev/zero of=$SCRATCH_MNT/$seq.test seek=$I bs=4k \
	   oflag=direct count=1 conv=notrunc >> $seqres.full 2>&1
done

# See if xfs_fsr works.

# The target file now has a non-local attribute, but the
# fsr temp file gets assigned a local attribute on creation,
# due to selinux.
    
# In this case, the large-ish selinux attr will create a forkoff
# in the temp file smaller than the forkoff in the target file,
# because the FMT_EXTENTS attr takes up less space.  If there is
# no mechanism to grow the temp forkoff to match, we can end up
# failing to swap these 2 inodes if the result is not enough
# data space in the temp inode as a result.

$XFS_FSR_PROG -v $SCRATCH_MNT/$seq.test | _filter_scratch

# success, all done
status=0
exit