zdtm: Test sit device C/R

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

test/zdtm/static/Makefile

@@ -172,6 +172,7 @@ TST_NOFILE	:=				\
 		helper_zombie_child		\
 		clone_fs			\
 		macvlan			\
+		sit				\
 		cr_veth				\
 		sock_peercred			\
 		s390x_mmap_high			\

test/zdtm/static/sit.c

@@ -0,0 +1,58 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/mount.h>
+#include <linux/limits.h>
+#include <signal.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include "zdtmtst.h"
+
+const char *test_doc	= "check sit devices";
+const char *test_author	= "Pavel Emelyanov <xemul@virtuozzo.com>";
+
+#define IF_NAME "zdtmsit0"
+#define LOCAL_ADDR	"1.1.1.2"
+#define REMOT_ADDR	"2.2.2.1"
+
+int main(int argc, char **argv)
+{
+	int ret = 1;
+
+	test_init(argc, argv);
+
+	if (system("ip link add " IF_NAME " type sit ttl 13 local " LOCAL_ADDR " remote " REMOT_ADDR)) {
+		pr_perror("Can't make sit device");
+		return 1;
+	}
+
+	if (system("ip -details addr list dev " IF_NAME " > sit.dump.test")) {
+		fail("can't save net config");
+		goto out;
+	}
+
+	test_daemon();
+	test_waitsig();
+
+	if (system("ip -details addr list dev " IF_NAME " > sit.rst.test")) {
+		fail("can't get net config");
+		goto out;
+	}
+
+	if (system("diff sit.rst.test sit.dump.test")) {
+		fail("Net config differs after restore");
+		goto out;
+	}
+
+	pass();
+	ret = 0;
+
+out:
+	return ret;
+}
+

test/zdtm/static/sit.desc

@@ -0,0 +1,3 @@
+{   'deps': [ '/bin/sh', '/sbin/ip|/bin/ip', '/usr/bin/diff' ],
+    'flags': 'suid',
+    'flavor': 'ns uns' }