#! /bin/bash
# FS QA Test No. f2fs/001
#
# Test inline_data behaviors when filesystem is full.
#
# The inline_data feature was introduced in ext4 and f2fs as follows.
#  ext4 : http://lwn.net/Articles/468678/
#  f2fs : http://lwn.net/Articles/573408/
#
# The basic idea is embedding small-sized file's data into relatively large
# inode space.
# In ext4, up to 132 bytes of data can be stored in 256 bytes-sized inode.
# In f2fs, up to 3.4KB of data can be embedded into 4KB-sized inode block.
#
#-----------------------------------------------------------------------
# Copyright (c) 2014 Jaegeuk Kim.  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

_supported_fs f2fs
_supported_os Linux
_require_scratch

testfile=$SCRATCH_MNT/testfile
dummyfile=$SCRATCH_MNT/dummyfile

# build 4GB filesystem
_scratch_mkfs_sized $((4 * 1024 * 1024 * 1024)) > /dev/null 2>&1
_scratch_mount

echo "==== create small file ===="
$XFS_IO_PROG -t -f -c "pwrite -S 0x58 0 40" $testfile | _filter_xfs_io

# -ENOSPC should be triggered
echo "==== Fullfill the partition ===="
$XFS_IO_PROG -t -f -c "falloc 0 5g" $dummyfile | _filter_xfs_io

# -ENOSPC should be triggered without any panic
echo "==== change i_size & write data ===="
$XFS_IO_PROG							\
	-c "truncate 96"					\
	-c "pwrite -S 0x58 8192 4096"				\
$testfile | _filter_xfs_io

echo "==== check data contents ===="
hexdump -C $testfile
_scratch_cycle_mount
hexdump -C $testfile

rm $testfile
rm $dummyfile

status=0
exit