shared: check corrupted orphaned inode list handling

Commit c9eb13a fixed this bug:
	ext4: fix hang when processing corrupted orphaned inode list

Signed-off-by: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

common/config

@@ -195,6 +195,7 @@ export DUMP_PROG="`set_prog_path dump`"
 export RESTORE_PROG="`set_prog_path restore`"
 export LVM_PROG="`set_prog_path lvm`"
 export CHATTR_PROG="`set_prog_path chattr`"
+export DEBUGFS_PROG="`set_prog_path debugfs`"
 
 # use 'udevadm settle' or 'udevsettle' to wait for lv to be settled.
 # newer systems have udevadm command but older systems like RHEL5 don't.

tests/shared/004

@@ -0,0 +1,64 @@
+#! /bin/bash
+# FS QA Test 004
+#
+# Regression test for commit:
+# c9eb13a ext4: fix hang when processing corrupted orphaned inode list
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016 Fujitsu.  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"
+
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+
+# real QA test starts here
+_supported_fs ext2 ext3 ext4
+_supported_os Linux
+_require_scratch
+_require_command "$DEBUGFS_PROG" debugfs
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+echo "Silence is golden"
+
+# Although the bug only happens when last_orphan is set to 5
+# it is better to test all reserved inode numbers 1-10 here
+for i in {1..10}; do
+	# create smaller filesystems to save test time
+	_scratch_mkfs_sized $((16 * 1024 * 1024)) >>$seqres.full 2>&1
+	$DEBUGFS_PROG -w -R "ssv last_orphan $i" $SCRATCH_DEV >>$seqres.full 2>&1
+	_scratch_mount
+	_scratch_unmount
+done
+
+# success, all done
+status=0
+exit

tests/shared/004.out

@@ -0,0 +1,2 @@
+QA output created by 004
+Silence is golden

tests/shared/group

@@ -6,6 +6,7 @@
 001 auto quick
 002 auto metadata quick
 003 auto quick
+004 auto quick
 006 auto enospc
 032 mkfs auto quick
 051 acl udf auto quick