1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) Linux Test Project, 2014-2020
4 */
5
6 #include <stdio.h>
7 #include "lapi/namespaces_constants.h"
8
9 #define NS_MAX 5
10 static int ns_types[NS_MAX];
11 static int ns_fds[NS_MAX];
12 static int ns_total;
13
get_ns_fd(int pid,const char * ns)14 static int get_ns_fd(int pid, const char *ns)
15 {
16 char tmp[PATH_MAX];
17 struct stat st;
18 int fd = -1;
19
20 sprintf(tmp, "/proc/%d/ns/%s", pid, ns);
21 if (stat(tmp, &st) == 0) {
22 fd = SAFE_OPEN(tmp, O_RDONLY);
23 } else {
24 if (errno != ENOENT)
25 tst_brk(TBROK|TERRNO, "failed to stat %s", tmp);
26 }
27 return fd;
28 }
29
init_ns_type(int clone_type,const char * proc_name)30 static void init_ns_type(int clone_type, const char *proc_name)
31 {
32 int fd;
33
34 fd = get_ns_fd(getpid(), proc_name);
35 if (fd != -1) {
36 ns_types[ns_total] = clone_type;
37 ns_fds[ns_total] = fd;
38 tst_res(TINFO, "ns_name=%s, ns_fds[%d]=%d, ns_types[%d]=0x%x",
39 proc_name, ns_total, fd, ns_total, clone_type);
40 ns_total++;
41 }
42 }
43
init_available_ns(void)44 static void init_available_ns(void)
45 {
46 init_ns_type(CLONE_NEWIPC, "ipc");
47 init_ns_type(CLONE_NEWNS, "mnt");
48 init_ns_type(CLONE_NEWNET, "net");
49 init_ns_type(CLONE_NEWPID, "pid");
50 init_ns_type(CLONE_NEWUTS, "uts");
51 }
52
close_ns_fds(void)53 static void close_ns_fds(void)
54 {
55 int i;
56
57 for (i = 0; i < ns_total; i++)
58 if (ns_fds[i] != -1)
59 SAFE_CLOSE(ns_fds[i]);
60 }
61