git: c44685732899 - main - Add stress2 test to exercise FFS forcible unmount with stacked nullfs

[Jason A. Harmening]

The branch main has been updated by jah:

URL: https://cgit.FreeBSD.org/src/commit/?id=c44685732899aa76e8c77107d711f98717ddc5c8

commit c44685732899aa76e8c77107d711f98717ddc5c8
Author:     Jason A. Harmening <jah at FreeBSD.org>
AuthorDate: 2021-07-19 15:33:02 +0000
Commit:     Jason A. Harmening <jah at FreeBSD.org>
CommitDate: 2021-07-24 19:52:56 +0000

    Add stress2 test to exercise FFS forcible unmount with stacked nullfs
    
    Reviewed by:    kib, mckusick
    Tested by:      pho
    Differential Revision:  https://reviews.freebsd.org/D31016
---
 tools/test/stress2/misc/gnop11.sh | 85 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)

diff --git a/tools/test/stress2/misc/gnop11.sh b/tools/test/stress2/misc/gnop11.sh
new file mode 100755
index 000000000000..8a23eb072144
--- /dev/null
+++ b/tools/test/stress2/misc/gnop11.sh
@@ -0,0 +1,85 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2020 Kirk McKusick <mckusick at mckusick.com>
+#
+# 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.
+#
+
+# 'panic: Lock (lockmgr) ufs not locked @ kern/kern_lock.c:1271' seen:
+# https://people.freebsd.org/~pho/stress/log/gnop8.txt
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+. ../default.cfg
+
+fsck=/sbin/fsck_ffs
+exp=/sbin/fsck_ffs.exp	# Experimental version
+[ -f $exp ] && { echo "Using $exp"; fsck=$exp; }
+mdconfig -a -t swap -s 5g -u $mdstart || exit 1
+md=md$mdstart
+newfs -j /dev/$md || exit 1
+start=`date +%s`
+
+nullfs_mounts=15
+: ${nullfs_dstdir:=$mntpoint}
+
+while [ $((`date +%s` - start)) -lt 120 ]; do
+	gnop create /dev/$md || exit 1
+	mount /dev/$md.nop /mnt || exit 1
+
+	for i in `jot $nullfs_mounts`; do
+		[ ! -d ${nullfs_dstdir}$i ] && mkdir ${nullfs_dstdir}$i
+		[ ! -d ${nullfs_dstdir}$(($i + $nullfs_mounts)) ] &&
+		    mkdir ${nullfs_dstdir}$(($i + $nullfs_mounts))
+		mount | grep -q " ${nullfs_dstdir}$i " &&
+		    umount ${nullfs_dstdir}$i
+		mount | grep -q " ${nullfs_dstdir}$(($i + $nullfs_mounts)) " &&
+		umount ${nullfs_dstdir}$(($i + $nullfs_mounts))
+		mount_nullfs /mnt ${nullfs_dstdir}$i > \
+		    /dev/null 2>&1
+		mount_nullfs ${nullfs_dstdir}$i ${nullfs_dstdir}$(($i + $nullfs_mounts)) > \
+		    /dev/null 2>&1
+	done
+	# start your favorite I/O test here
+	cp -rp /[a-l]* /[n-z]* /mnt &
+
+	# after some number of seconds
+	sleep 1
+	gnop destroy -f /dev/$md.nop
+	kill $!
+
+	# wait until forcible unmount, may be up to about 30 seconds,
+	# but typically very quick if I/O is in progress
+	while (a=`mount | egrep /mnt`) do sleep 1; done
+
+	# first fsck will attempt journal recovery
+	$fsck -d -y /dev/$md
+
+	# second fsck will do traditional fsck to check for any errors
+	# from journal recovery
+	$fsck -d -y /dev/$md
+	wait
+done
+mdconfig -d -u ${md#md}
+exit 0