1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2019 Federico Bonfiglio <[email protected]>
4 * Copyright (c) Linux Test Project, 2019-2022
5 */
6
7 /*\
8 * [Description]
9 *
10 * Test ioctl_ns with NS_GET_USERNS request.
11 *
12 * Owning user namespace of process calling ioctl is out of scope,
13 * which should make the call fail with EPERM.
14 */
15
16 #define _GNU_SOURCE
17
18 #include <errno.h>
19 #include "tst_test.h"
20 #include "lapi/ioctl_ns.h"
21
setup(void)22 static void setup(void)
23 {
24 int exists = access("/proc/self/ns/user", F_OK);
25
26 if (exists < 0)
27 tst_res(TCONF, "namespace not available");
28 }
29
run(void)30 static void run(void)
31 {
32 int fd, parent_fd;
33
34 fd = SAFE_OPEN("/proc/self/ns/user", O_RDONLY);
35 parent_fd = ioctl(fd, NS_GET_USERNS);
36 if (parent_fd == -1) {
37 if (errno == ENOTTY)
38 tst_brk(TCONF, "ioctl(NS_GET_USERNS) not implemented");
39
40 if (errno == EPERM)
41 tst_res(TPASS, "NS_GET_USERNS fails with EPERM");
42 else
43 tst_res(TFAIL | TERRNO, "unexpected ioctl error");
44 } else {
45 tst_res(TFAIL, "call to ioctl succeded");
46 }
47 SAFE_CLOSE(fd);
48 }
49
50 static struct tst_test test = {
51 .test_all = run,
52 .min_kver = "4.9",
53 .setup = setup
54 };
55