1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2019 Federico Bonfiglio fedebonfi95@gmail.com
4 */
5
6 /*
7 * Test ioctl_ns with NS_GET_PARENT request.
8 *
9 * Tries to get namespace parent for UTS namespace, which
10 * should make the call fail with EINVAL, being a nonhierarchical
11 * namespace.
12 *
13 */
14 #define _GNU_SOURCE
15
16 #include <errno.h>
17 #include "tst_test.h"
18 #include "lapi/ioctl_ns.h"
19
setup(void)20 static void setup(void)
21 {
22 int exists = access("/proc/self/ns/uts", F_OK);
23
24 if (exists < 0)
25 tst_res(TCONF, "namespace not available");
26 }
27
run(void)28 static void run(void)
29 {
30 int fd, parent_fd;
31
32 fd = SAFE_OPEN("/proc/self/ns/uts", O_RDONLY);
33 parent_fd = ioctl(fd, NS_GET_PARENT);
34 if (parent_fd == -1) {
35 if (errno == ENOTTY)
36 tst_brk(TCONF, "ioctl(NS_GET_PARENT) not implemented");
37
38 if (errno == EINVAL)
39 tst_res(TPASS, "NS_GET_PARENT fails with EINVAL");
40 else
41 tst_res(TFAIL | TERRNO, "unexpected ioctl error");
42 } else {
43 SAFE_CLOSE(fd);
44 tst_res(TFAIL, "call to ioctl succeded");
45 }
46 }
47
48 static struct tst_test test = {
49 .test_all = run,
50 .min_kver = "4.9",
51 .setup = setup
52 };
53