tests/generic/473

#! /bin/bash
# FS QA Test No. 473
#
# Test for the new ranged query functionality in xfs_io's fiemap command.
# This tests various combinations of hole + data layout being printed.
# Also the test used 16k holes to be compatible with 16k block filesystems
#
#-----------------------------------------------------------------------
# Copyright (c) 2017 SUSE Linux Products GmbH. All Rights Reserved.
# Author: Nikolay Borisov <nborisov@suse.com>
#
# 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/punch

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here

# Modify as appropriate.
_supported_os Linux
_require_test
_require_xfs_io_command "truncate"
# ranged is a special argument which checks if fiemap supports
# [offset [len]] args
_require_xfs_io_command "fiemap" "ranged"

file=$TEST_DIR/fiemap.$seq
rm -f $file

# Create a file with 64k hole followed by 64k data, and this pattern
# repeats till it reaches 4M file size, so each extent has 64k data.
# But truncate file to its final size first, otherwise XFS would merge
# some extents due to speculative preallocation.
$XFS_IO_PROG -f -c "truncate 4m" $file
for i in {0..31}; do
	$XFS_IO_PROG -c "pwrite $(($i*128+64))k 64k" $file >/dev/null;
done

# Query 1 data extent between 64k..64k range
echo "Basic data extent"
$XFS_IO_PROG -c "fiemap -v 64k 64k" $file | _filter_fiemap

# Query data and hole extent
echo "Data + Hole"
$XFS_IO_PROG -c "fiemap -v 64k 80k" $file | _filter_fiemap

echo "Hole + Data"
$XFS_IO_PROG -c "fiemap -v 0 65k" $file | _filter_fiemap

echo "Hole + Data + Hole"
$XFS_IO_PROG -c "fiemap -v 0k 130k" $file | _filter_fiemap

echo "Data + Hole + Data"
$XFS_IO_PROG -c "fiemap -v 64k 192k" $file | _filter_fiemap

echo "Beginning with a hole"
$XFS_IO_PROG -c "fiemap -v 0 3k" $file | _filter_fiemap

# Query for 0..160k that's 40 extents, more than the EXTENT_BATCH
echo "Query more than 32 extents"
$XFS_IO_PROG -c "fiemap -v 0 3m" $file | _filter_fiemap

echo "Larger query than file size"
$XFS_IO_PROG -c "fiemap -v 0 5m" $file | _filter_fiemap

# mapping past eof shouldn't print anything"
$XFS_IO_PROG -c "fiemap -v 5m" $file | _filter_fiemap

echo "Skip first hole"
# check everything without the first hole
$XFS_IO_PROG -c "fiemap -v 64k" $file | _filter_fiemap

# success, all done
status=0
exit