generic: add new defragment test

Check defrag utility on file with large number of fragments, from 20 to 2000.
2000 fragments means that b+tree will have at least two index blocks.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

tests/generic/324

@@ -0,0 +1,81 @@
+#! /bin/bash
+# FS QA Test No. generic/324
+#
+# Sanity check for defrag utility.
+#
+#-----------------------------------------------------------------------
+# 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"
+
+PIDS=""
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/defrag
+
+# real QA test starts here
+_supported_os Linux
+_need_to_be_root
+_require_scratch
+_require_defrag
+
+rm -f $seqres.full
+
+_workout()
+{
+	nr=$1
+	echo "Defragment file with $nr * 2 fragments"
+	# Create sparse file
+	for ((i=0;i<nr;i++))
+	do
+		$XFS_IO_PROG -f -c "falloc $((409600*i)) 4k"  \
+			$SCRATCH_MNT/test.$nr >> $seqres.full 2>&1
+	done
+	# Fill holes for half of range , as result file will contain nr*1.5 fragments
+	$XFS_IO_PROG -c "falloc 0 $((204800*nr))"  \
+	    $SCRATCH_MNT/test.$nr | _filter_xfs_io
+	# Data wrilte will convert extetns to inialized ones
+	for ((i=0;i<nr;i++))
+	do
+		patt=`printf "0x%x" $i`
+		$XFS_IO_PROG -c "pwrite -S $patt $((i*123400)) 1234" \
+			$SCRATCH_MNT/test.$nr | _filter_xfs_io
+	done
+	_defrag --min_before $nr --max_before $((nr*4)) \
+		--min_after 1 $SCRATCH_MNT/test.$nr
+}
+
+
+# Actual testing starting from here
+_scratch_mkfs  >> $seqres.full 2>&1
+_scratch_mount
+_workout 10
+_workout 250
+_workout 1000
+status=0

tests/generic/group

@@ -143,3 +143,4 @@
 321 auto quick metadata log
 322 auto quick metadata log
 323 auto aio stress
+324 auto fsr quick