1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2019 Federico Bonfiglio <fedebonfi95@gmail.com>
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
22static 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
30static 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
50static struct tst_test test = {
51	.test_all = run,
52	.min_kver = "4.9",
53	.setup = setup
54};
55