From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Tue, 30 Oct 2018 18:03:35 +0000 (-0700)
Subject: xfs: test repair regression of dir w/ single leafn block
X-Git-Tag: v2022.05.01~1362
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=acada47e49b812c77f33c39347e8fc67d034e443;p=xfstests-dev.git

xfs: test repair regression of dir w/ single leafn block

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
---

diff --git a/tests/xfs/495 b/tests/xfs/495
new file mode 100755
index 00000000..91a55388
--- /dev/null
+++ b/tests/xfs/495
@@ -0,0 +1,71 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2018 Oracle, Inc.  All Rights Reserved.
+#
+# FS QA Test No. 495
+#
+# Test for two related regressions -- first, check that repair doesn't
+# repeatedly rebuild directories with a single leafn block; and check that
+# repair also doesn't crash when it hits a corrupt da btree with a zero before
+# pointer.
+#
+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 7 15
+
+_cleanup()
+{
+	cd /
+	rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/populate
+. ./common/fuzzy
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_xfs_fuzz_fields
+
+echo "Format and populate"
+_scratch_populate_cached nofill > $seqres.full 2>&1
+
+filter_nbrepair() {
+	grep rebuilding | sed -e 's/directory inode [0-9]*/directory inode XXX/g'
+}
+
+run_repair() {
+	_scratch_xfs_repair > $tmp.repair 2>&1
+	cat $tmp.repair >> $seqres.full
+	cat $tmp.repair | filter_nbrepair
+}
+
+echo "Check leafn rebuilds"
+run_repair
+run_repair
+
+echo "Fuzz nbtree[0].before to zero"
+_scratch_mount
+inum=$(stat -c '%i' $SCRATCH_MNT/S_IFDIR.FMT_NODE)
+blk_sz=$(_get_block_size $SCRATCH_MNT)
+_scratch_unmount
+leaf_offset=$(( (2 ** 35) / blk_sz ))
+_scratch_xfs_fuzz_metadata_field "nbtree[0].before" "zeroes" "inode ${inum}" \
+				 "dblock ${leaf_offset}" >> $seqres.full
+
+echo "Check nbtree[0].before repair"
+run_repair
+run_repair
+
+# success, all done
+echo Done
+status=0
+exit
diff --git a/tests/xfs/495.out b/tests/xfs/495.out
new file mode 100644
index 00000000..4565a827
--- /dev/null
+++ b/tests/xfs/495.out
@@ -0,0 +1,7 @@
+QA output created by 495
+Format and populate
+Check leafn rebuilds
+Fuzz nbtree[0].before to zero
+Check nbtree[0].before repair
+rebuilding directory inode XXX
+Done
diff --git a/tests/xfs/group b/tests/xfs/group
index 136d3707..cd8e5141 100644
--- a/tests/xfs/group
+++ b/tests/xfs/group
@@ -492,3 +492,4 @@
 492 auto quick fuzz
 493 auto quick fuzz
 494 auto quick
+495 auto quick repair