1 files changed, 144 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/msdos17.sh b/tools/test/stress2/misc/msdos17.sh
new file mode 100755
index 000000000000..392a9a622b9a
--- /dev/null
+++ b/tools/test/stress2/misc/msdos17.sh
@@ -0,0 +1,144 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2025 Peter Holm <pho@FreeBSD.org>
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+
+# No problems observed
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+. ../default.cfg
+
+set -u
+prog=$(basename "$0" .sh)
+mount | grep -q "on $mntpoint " && umount $mntpoint
+[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
+
+mdconfig -a -t swap -s 1g -u $mdstart
+gpart create -s bsd md$mdstart > /dev/null
+gpart add -t freebsd-ufs md$mdstart > /dev/null
+part=a
+newfs_msdos -F 32 -b 8192 /dev/md${mdstart}$part > /dev/null || exit 1
+mount -t msdosfs /dev/md${mdstart}$part $mntpoint
+
+here=`pwd`
+cd /tmp
+cat > $prog.c <<EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <machine/atomic.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static volatile u_int *share;
+static char file1[80], file2[80];
+
+#define SYNC 0
+#define STOP 1
+
+static void
+test0(void)
+{
+	struct stat sb;
+
+	while (share[STOP] == 0) {
+		while (share[SYNC] != 0)
+			usleep(100);
+		if (rename(file1, file2) == -1)
+			err(1, "rename(%s, %s)", file1, file2);
+		if (stat(file1, &sb) == 0)
+			err(1, "stat(%s)", file1);
+		atomic_add_int(&share[SYNC], 1);
+	}
+
+	_exit(0);
+}
+
+static void
+test1(void)
+{
+	struct stat sb;
+
+	while (share[STOP] == 0) {
+		while (share[SYNC] != 1)
+			usleep(100);
+		if (rename(file2, file1) == -1)
+			err(1, "rename(%s, %s)", file2, file1);
+		if (stat(file2, &sb) == 0)
+			err(1, "stat(%s)", file2);
+		atomic_add_int(&share[SYNC], -1);
+	}
+
+	_exit(0);
+}
+
+int
+main(void)
+{
+	pid_t pids[2];
+	size_t len;
+	int fd;
+	char cwd[80];
+
+	len = PAGE_SIZE;
+	if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+	    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+
+	if (getcwd(cwd, sizeof(cwd)) == NULL)
+		err(1, "getcwd()");
+	snprintf(file1, sizeof(file1), "%s/a.%06d", cwd, getpid());
+	snprintf(file2, sizeof(file2), "%s/b.%06d", cwd, getpid());
+	if ((fd = open(file1, O_CREAT, 0640)) == -1)
+		err(1, "open(%s)", file1);
+	close(fd);
+
+	if ((pids[0] = fork()) == 0)
+		test0();
+	if ((pids[1] = fork()) == 0)
+		test1();
+
+	sleep(120);
+	share[STOP] = 1;
+
+	if (waitpid(pids[0], NULL, 0) == -1)
+		err(1, "waitpid(%d)", pids[0]);
+	if (waitpid(pids[1], NULL, 0) == -1)
+		err(1, "waitpid(%d)", pids[1]);
+	unlink(file1);
+	unlink(file2);
+}
+EOF
+mycc -o $prog -Wall $prog.c || exit 1
+rm -f $prog.c
+cd $here
+
+(cd ../testcases/swap; ./swap -t 5m -i 20 -l 100) &
+cd $mntpoint
+pids=""
+for i in `jot 30`; do
+	/tmp/$prog &
+	pids="$pids $!"
+done
+for pid in $pids; do
+	wait $pid
+done
+cd $here
+while pkill swap; do :; done
+wait
+
+umount $mntpoint
+mdconfig -d -u $mdstart
+rm -f /tmp/$prog
+exit 0