1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <sys/types.h>
typedef enum NamespaceType {
NAMESPACE_CGROUP,
NAMESPACE_IPC,
NAMESPACE_NET,
NAMESPACE_MOUNT,
NAMESPACE_PID,
NAMESPACE_USER,
NAMESPACE_UTS,
NAMESPACE_TIME,
_NAMESPACE_TYPE_MAX,
_NAMESPACE_TYPE_INVALID = -EINVAL,
} NamespaceType;
extern const struct namespace_info {
const char *proc_name;
const char *proc_path;
unsigned int clone_flag;
} namespace_info[_NAMESPACE_TYPE_MAX + 1];
int namespace_open(
pid_t pid,
int *ret_pidns_fd,
int *ret_mntns_fd,
int *ret_netns_fd,
int *ret_userns_fd,
int *ret_root_fd);
int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd);
int fd_is_ns(int fd, unsigned long nsflag);
int detach_mount_namespace(void);
int detach_mount_namespace_harder(uid_t target_uid, gid_t target_gid);
int detach_mount_namespace_userns(int userns_fd);
static inline bool userns_shift_range_valid(uid_t shift, uid_t range) {
/* Checks that the specified userns range makes sense, i.e. contains at least one UID, and the end
* doesn't overflow uid_t. */
assert_cc((uid_t) -1 > 0); /* verify that uid_t is unsigned */
if (range <= 0)
return false;
if (shift > (uid_t) -1 - range)
return false;
return true;
}
int userns_acquire_empty(void);
int userns_acquire(const char *uid_map, const char *gid_map);
int netns_acquire(void);
int in_same_namespace(pid_t pid1, pid_t pid2, NamespaceType type);
int parse_userns_uid_range(const char *s, uid_t *ret_uid_shift, uid_t *ret_uid_range);
int namespace_open_by_type(NamespaceType type);
int is_our_namespace(int fd, NamespaceType type);
|
