generic: test orphan inode recovery on RO mount

There's a bug in xfs where the orphan inode list
is not processed on a readonly mount, and is still not
processed even if it gets mounted rw.  This test exercises
that, and makes sure that the unlinked list is empty after
a transition to rw and an unmount.

While we're at it, sanity check the same thing for pure ro
and rw unmounts.

Now that shutdown is generic, we can test other filesystems
as well, so this is in the generic group.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

tests/generic/417

@@ -0,0 +1,118 @@
+#! /bin/bash
+# FS QA Test 417
+#
+# Test orphan inode / unlinked list processing on RO mount & RW transition
+#
+# A filesystem that crashes with open but unlinked inodes should
+# be consistent after a ro, ro->rw, or rw mount cycle.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 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"
+
+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
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_scratch
+_require_scratch_shutdown
+_require_metadata_journaling $SCRATCH_DEV
+_require_test_program "multi_open_unlink"
+
+
+function create_dirty_orphans() {
+
+	_scratch_mount
+
+	num_files=200
+	num_eas=1
+	ea_val_size=1024
+
+	# sleep for ages and we will kill this pid when we are ready
+	delay=100
+
+	echo "open and unlink $num_files files with EAs"
+	src/multi_open_unlink -f $SCRATCH_MNT/test_file \
+		-n $num_files -s $delay -e $num_eas -v $ea_val_size &
+	pid=$!
+
+	# time to create and unlink all the files
+	sleep 3
+
+	echo "godown"
+	src/godown -v -f $SCRATCH_MNT >> $seqres.full
+
+	# kill the multi_open_unlink
+	kill $pid 2>/dev/null
+	wait $pid 2>/dev/null
+	pid=""
+
+	_scratch_unmount
+}
+
+# Does a regular rw mount handle the orphan list?
+echo "mount dirty orphans rw, then unmount"
+create_dirty_orphans
+_scratch_mount
+_scratch_unmount
+# We should be clean at this point
+echo "check fs consistency"
+_check_scratch_fs
+
+# Does a ro mount handle the orphan list?
+echo "mount dirty orphans ro, then unmount"
+create_dirty_orphans
+_scratch_mount -o ro
+_scratch_unmount
+# We should be clean at this point
+echo "check fs consistency"
+_check_scratch_fs
+
+# Does a mount with ro->rw transition handle orphan list?
+echo "mount dirty orphans ro and remount rw, then unmount"
+create_dirty_orphans
+_scratch_mount -o ro
+_scratch_remount rw
+_scratch_unmount
+# We should be clean at this point
+echo "check fs consistency"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit

tests/generic/417.out

@@ -0,0 +1,13 @@
+QA output created by 417
+mount dirty orphans rw, then unmount
+open and unlink 200 files with EAs
+godown
+check fs consistency
+mount dirty orphans ro, then unmount
+open and unlink 200 files with EAs
+godown
+check fs consistency
+mount dirty orphans ro and remount rw, then unmount
+open and unlink 200 files with EAs
+godown
+check fs consistency

tests/generic/group

@@ -419,3 +419,4 @@
 414 auto quick clone
 415 auto clone
 416 auto enospc
+417 auto quick shutdown log