>From 6f90894347d579e6cc6be9af159eb5d4a12c059e Mon Sep 17 00:00:00 2001
From: Alexander Tsvetkov <alexander.tsvetkov@oracle.com>
Date: Tue, 23 Dec 2014 14:58:13 +0300
Subject: [PATCH] added test for max_dir_size_kb mount option

---
 tests/ext4/005     | 137 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/ext4/005.out |   2 +
 tests/ext4/group   |   1 +
 3 files changed, 140 insertions(+)
 create mode 100755 tests/ext4/005
 create mode 100644 tests/ext4/005.out

diff --git a/tests/ext4/005 b/tests/ext4/005
new file mode 100755
index 0000000..4cfcb25
--- /dev/null
+++ b/tests/ext4/005
@@ -0,0 +1,137 @@
+#! /bin/bash
+# FS QA Test
+#
+# Test for mount option max_dir_size_kb
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2014 Oracle and/or its affiliates.  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
+tmp=/tmp/$$
+
+testdir=$SCRATCH_MNT/dir1.$seq
+testdir2=$testdir/dir2.$seq
+testfile=$SCRATCH_MNT/testfile
+
+echo "QA output created by $seq"
+echo "Silence is golden"
+rm -f $seqres.full
+
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	rm -rf $tmp.*
+}
+
+# filter expected output with ENOSPC error
+filter_enospc()
+{
+	sed -e "/^.*No space left on device$/d"
+}
+
+# $1 - expected limit after filling
+# $2 - where to create
+create_items() 
+{
+	limit=$1
+	dir=${2:-$testdir}
+	sync
+	echo 3 > /proc/sys/vm/drop_caches
+	MAX_INUM=$((limit * 1024 * 3 / 24))
+	for i in $(seq 0 $MAX_INUM); do
+		touch $dir/$i 2>&1 1>/dev/null | filter_enospc
+		if [ ${PIPESTATUS[0]} -ne 0 ]; then
+			break
+		fi
+	done
+	size=$(stat -c %s $dir)
+	size=$((size / 1024))
+	if [ $size -gt $limit ]; then
+		echo "FAIL! expected dir size: $limit, actually: $size"
+	fi
+}
+
+# $1 - low directory limit value
+# $2 - high directory limit value 
+# $3 - mkfs options
+run_test()
+{
+	LIMIT1=$1
+	LIMIT2=$2
+	MKFS_OPT=$3
+
+	_scratch_mkfs $MKFS_OPT >>$seqres.full 2>&1
+	_scratch_mount -o max_dir_size_kb=$LIMIT1
+	mkdir $testdir
+
+	# Exceed with low limit
+	create_items $LIMIT1
+
+	# Exceed with the same limit after remount
+	_scratch_mount "-o remount,max_dir_size_kb=$LIMIT1"
+	create_items $LIMIT1
+
+	# Exceed with high limit after remount 
+	_scratch_mount "-o remount,max_dir_size_kb=$LIMIT2"
+	create_items $LIMIT2
+
+	# Exceed with low limit after remount 
+	_scratch_mount "-o remount,max_dir_size_kb=$LIMIT1"
+	create_items $LIMIT2
+
+	# Exceed limits of two test dirs resided on different fs, 
+	# second fs is mounted on nested test dir of the first fs
+	rm -fr $testdir/*
+	rmdir $testdir
+	mkdir -p $testdir2
+	touch $testfile
+	$MKFS_EXT4_PROG -F $MKFS_OPT $testfile 4m >> $seqres.full 2>&1
+	_mount -o loop,max_dir_size_kb=$LIMIT2 $testfile $testdir2
+	create_items $LIMIT1
+	create_items $LIMIT2 $testdir2
+	_scratch_mount "-o remount,max_dir_size_kb=$LIMIT2"
+	_mount -o remount,max_dir_size_kb=$LIMIT1 $testfile $testdir2
+	create_items $LIMIT2
+	create_items $LIMIT2 $testdir2
+
+	umount -d $testdir2
+	_scratch_unmount >/dev/null 2>&1
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+
+# real QA test starts here
+
+_supported_fs ext4
+_supported_os Linux
+_require_scratch
+_require_loop
+
+run_test 8 16
+run_test 4 32 "-O ^dir_index"
+run_test 5 11 "-b 1024" 
+
+# success, all done
+status=0
+exit
+
diff --git a/tests/ext4/005.out b/tests/ext4/005.out
new file mode 100644
index 0000000..a5027f1
--- /dev/null
+++ b/tests/ext4/005.out
@@ -0,0 +1,2 @@
+QA output created by 005
+Silence is golden
diff --git a/tests/ext4/group b/tests/ext4/group
index e7f1f2a..f02d221 100644
--- a/tests/ext4/group
+++ b/tests/ext4/group
@@ -7,6 +7,7 @@
 002 auto quick prealloc
 003 auto quick
 004 auto dump
+005 auto
 271 auto rw quick
 301 aio dangerous ioctl rw stress
 302 aio dangerous ioctl rw stress
-- 
1.9.3