stress2: Added two new tests

tools/test/stress2/misc/nullfs28.sh

+#!/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.
+#
+
+# Scenario: mount -t nullfs /mnt /mnt
+
+# Seen:
+# [root@mercat1 /home/pho]# ps -lUroot | grep -v grep | grep -E "find|umount"
+#   0 23496  3144  0  52  0  12856  2544 ufs      D+    0   0:00.00 find /mnt -type f -maxdepth 2 -ls
+#   0 23497  3126  6  52  0  12812  2512 mount dr D+    0   0:00.00 umount /mnt
+# [root@mercat1 /home/pho]# 
+
+# Test suggestion by Jason Harmening:
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+. ../default.cfg
+
+nullfs_srcdir=$mntpoint
+nullfs_dstdir=$mntpoint
+runtime=300
+
+set -e
+mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
+mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 2g -u $mdstart || exit 1
+newfs $newfs_flags md$mdstart > /dev/null
+mount /dev/md$mdstart $mntpoint
+chmod 777 $mntpoint
+set +e
+
+start=`date '+%s'`
+while [ `date '+%s'` -lt $((start + $runtime)) ]; do
+	find $nullfs_dstdir -type f -maxdepth 2 -ls > \
+	    /dev/null 2>&1
+done &
+
+(cd ../testcases/swap; ./swap -t ${runtime}s -i 20) &
+start=`date '+%s'`
+while [ `date '+%s'` -lt $((start + $runtime)) ]; do
+	mount_nullfs $nullfs_srcdir $nullfs_dstdir
+	opt=$([ `jot -r 1 0 1` -eq 0 ] && echo "-f")
+	while mount | grep nullfs | grep -q ${nullfs_dstdir}; do
+		umount $opt $nullfs_dstdir
+	done
+done > /dev/null 2>&1
+pkill swap
+wait
+n=0
+while mount | grep $mntpoint | grep -q /dev/md; do
+	umount $mntpoint || sleep 1
+	n=$((n + 1))
+	[ $n -gt 30 ] && { echo FAIL; status=2; }
+done
+mdconfig -d -u $mdstart
+exit 0

tools/test/stress2/misc/unionfs14.sh

+#!/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.
+#
+
+# Parallel mount and umount test.
+# Copy of unionfs9.sh, with a subdirectory mount point.
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+. ../default.cfg
+
+mounts=3	# Number of parallel scripts
+CONT=/tmp/unionfs9.continue
+
+set -e
+mdconfig -a -t swap -s 256m -u $mdstart
+newfs $newfs_flags -n md$mdstart > /dev/null
+mount /dev/md$mdstart $mntpoint
+
+for i in `jot $mounts $((mdstart + 2))`; do
+	mdconfig -a -t swap -s 512m -u $((mdstart + i))
+	newfs $newfs_flags -n md$((mdstart + i)) > /dev/null
+	mkdir -p ${mntpoint}$i
+	mount /dev/md$((mdstart + i)) ${mntpoint}$i
+	mkdir -p ${mntpoint}$i/dir
+done
+set +e
+echo Pre:
+mount | grep mnt
+
+(cd $mntpoint; jot 500 | xargs touch)
+(cd ../testcases/swap; ./swap -t 5m -i 20 > /dev/null) &
+
+# Start the parallel tests
+touch $CONT
+for i in `jot $mounts $((mdstart + 2))`; do
+	while [ -f $CONT ]; do
+		find ${mntpoint}$i -type f -maxdepth 2 -ls > \
+		    /dev/null 2>&1
+	done &
+	# The test: Parallel mount and unmounts
+	start=`date +%s`
+	(
+		while [ $((`date +%s` - start))  -lt 300 ]; do
+			mount_unionfs $mntpoint ${mntpoint}$i/dir
+			opt=$([ `jot -r 1 0 1` -eq 0 ] && echo "-f")
+			while mount | grep -q ${mntpoint}$i/dir; do
+				umount $opt ${mntpoint}$i/dir
+			done
+		done > /dev/null 2>&1
+		rm -f $CONT
+	) &
+done
+while [ -f $CONT ] ; do sleep 1; done
+while pgrep -q swap; do pkill swap; done
+wait
+echo Post:
+mount | grep mnt
+
+for i in `jot $mounts $((mdstart + 2))`; do
+	umount ${mntpoint}$i > /dev/null 2>&1
+	mdconfig -d -u $((mdstart + i))
+	rmdir ${mntpoint}$i
+done
+while mount | grep $mntpoint | grep -q /dev/md; do
+	umount $mntpoint || sleep 1
+	[ $((n += 1)) -gt 300 ] && { echo FAIL; exit 1; }
+done
+mdconfig -d -u $mdstart
+exit 0