stress2: Added a mount(8) test scenario

tools/test/stress2/misc/mount7.sh

@@ -0,0 +1,57 @@
+#!/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.
+#
+
+# Another parallel mount(8) test scenario
+
+. ../default.cfg
+
+mounts=15
+
+../testcases/swap/swap -t 2m -i 20 &
+for i in `jot $mounts $mdstart`; do
+	mdconfig -a -s 50m -u $i
+	newfs -U /dev/md$i > /dev/null
+	mkdir -p $mntpoint$i
+	start=`date +%s`
+	while [ $((`date +%s` - start)) -lt 120 ]; do
+		mount /dev/md$i $mntpoint$i && cp /etc/passwd $mntpoint$i
+		while mount | grep -q " on $mntpoint$i "; do
+			umount $mntpoint$i > /dev/null 2>&1
+		done
+	done &
+	while [ $((`date +%s` - start)) -lt 120 ]; do
+		find $mntpoint$i -ls > /dev/null 2>&1
+	done &
+done
+wait
+
+for i in `jot $mounts $mdstart`; do
+	mdconfig -d -u $i
+	rmdir  $mntpoint$i
+done
+exit $s