stress2: Add a fsck_ffs regression test scenario

tools/test/stress2/misc/fsck7.sh

@@ -0,0 +1,65 @@
+#!/bin/sh
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+# fsck -B test scenario
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+. ../default.cfg
+mycc -o /tmp/zapsb -Wall -Wextra ../tools/zapsb.c || exit 1
+
+set -e
+log=/tmp/fsck7.sh.log
+md=/dev/md$mdstart
+[ -c $md ] && mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 5g -u $mdstart
+newfs -U $md > /dev/null 2>&1
+mount $md $mntpoint
+set +e
+
+jot 500 | xargs -P0 -I% touch $mntpoint/a%
+umount $mntpoint
+/tmp/zapsb $md
+
+echo "Expect:
+    Superblock check-hash failed"
+mount -f $md $mntpoint
+
+fsck -B -p -t ufs $md &
+
+jot 500 | xargs -P0 -I% rm $mntpoint/a%
+jot 500 | xargs -P0 -I% touch $mntpoint/b%
+
+wait
+umount $mntpoint
+mount $md $mntpoint || exit 1	# The SB should be fixed at this point
+umount $mntpoint
+fsck -fy $md 2>&1 | tee $log
+grep -q 'FILE SYSTEM IS CLEAN' $log && s=0 || s=1
+mdconfig -d -u $mdstart
+rm -f $log /tmp/zapsb
+exit $s