zdtm: check enabled file systems

Signed-off-by: Andrew Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm/static/Makefile

@@ -233,6 +233,7 @@ TST_DIR		=				\
 		mnt_ext_dev			\
 		mntns_deleted			\
 		unlink_regular00		\
+		mnt_enablefs			\
 
 TST_DIR_FILE	=				\
 		chroot				\

test/zdtm/static/mnt_enablefs.c

+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <linux/limits.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Check enabled file systems (--enable-fs)";
+const char *test_author	= "Andrei Vagin <avagin@virtuozzo.com>";
+
+char *dirname;
+TEST_OPTION(dirname, string, "directory name", 1);
+
+int main(int argc, char **argv)
+{
+	char fname[PATH_MAX];
+
+	test_init(argc, argv);
+
+	mkdir(dirname, 0777);
+
+	if (mount("zdtm_nfsd", dirname, "nfsd", 0, NULL) == -1) {
+		pr_perror("mount");
+		return -1;
+	}
+
+	snprintf(fname, sizeof(fname), "%s/exports", dirname);
+
+	test_daemon();
+	test_waitsig();
+
+	if (access(fname, F_OK))
+		fail();
+
+	pass();
+
+	return 0;
+}

test/zdtm/static/mnt_enablefs.checkskip

+#!/bin/sh
+
+unshare -m --propagation private mount -t nfsd nfsd /mnt

test/zdtm/static/mnt_enablefs.desc

+{'flavor': 'ns', 'feature': 'mnt_id', "flags": "suid", "opts" : "--enable-fs nfsd" }