[PATCH] xfs: test inobt/on disk free state mismatches

[Dave Chinner <david@fromorbit.com>]

From: Dave Chinner <dchinner@redhat.com>

Fuzzing has recently uncovered a couple of conditions where we don't
detect corruptions that reallocate already allocated inodes. This
test exercises those cases, and checks that we shut down the
filesystem appropriately when such a corruption occurs.

Signed-Off-By: Dave Chinner <dchinner@redhat.com>
---
 tests/xfs/450     | 73 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/xfs/450.out | 26 +++++++++++++++++
 tests/xfs/group   |  1 +
 3 files changed, 100 insertions(+)
 create mode 100755 tests/xfs/450
 create mode 100644 tests/xfs/450.out

diff --git a/tests/xfs/450 b/tests/xfs/450
new file mode 100755
index 000000000000..bac001690d60
--- /dev/null
+++ b/tests/xfs/450
@@ -0,0 +1,73 @@
+#! /bin/bash
+# FS QA Test 450
+#
+# Catch inobt/on disk inode free state mismatches on V4 filesystems
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2018 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 xfs
+_supported_os Linux
+
+# we intentionally corrupt the filesystem, so don't check it after the test
+_require_scratch_nocheck
+
+# on success, we'll get a shutdown filesystem with a really noisy log message
+# due to transaction cancellation.  Hence we don't want to check dmesg here.
+_disable_dmesg_check
+
+_require_xfs_mkfs_crc
+_scratch_mkfs -m crc=0 > $seqres.full 2>&1
+
+# corrupt an inode in the root inode chunk
+root_ino=`$XFS_DB_PROG -c "sb 0" -c "p rootino" $SCRATCH_DEV`
+corrupt_ino=$((root_ino + 15))
+$XFS_DB_PROG -x -c "inode $corrupt_ino" -c "write core.mode 0100644" $SCRATCH_DEV
+
+_scratch_mount
+
+# The corrupt inode should be tripped over during these initial file creates.
+touch $SCRATCH_MNT/file{0,1,2,3,4,5}{0,1,2,3,4,5} 2>&1 | _filter_scratch
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/450.out b/tests/xfs/450.out
new file mode 100644
index 000000000000..379a8d6f6ec9
--- /dev/null
+++ b/tests/xfs/450.out
@@ -0,0 +1,26 @@
+QA output created by 450
+core.mode = 0100644
+touch: cannot touch 'SCRATCH_MNT/file20': Structure needs cleaning
+touch: cannot touch 'SCRATCH_MNT/file21': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file22': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file23': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file24': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file25': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file30': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file31': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file32': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file33': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file34': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file35': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file40': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file41': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file42': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file43': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file44': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file45': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file50': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file51': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file52': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file53': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file54': Input/output error
+touch: cannot touch 'SCRATCH_MNT/file55': Input/output error
diff --git a/tests/xfs/group b/tests/xfs/group
index d62345fc8f96..aeb8ba963ade 100644
--- a/tests/xfs/group
+++ b/tests/xfs/group
@@ -440,5 +440,6 @@
 441 auto quick clone quota
 442 auto stress clone quota
 443 auto quick ioctl fsr
+450 auto quick 
 444 auto quick
 445 auto quick filestreams
-- 
2.17.0