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1 | /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) |
2 | * | |
3 | * wrapper/user_namespace.h | |
4 | * | |
5 | * Copyright (C) 2019 Michael Jeanson <mjeanson@efficios.com> | |
6 | * | |
7 | */ | |
8 | ||
9 | #ifndef _LTTNG_WRAPPER_USER_NAMESPACE_H | |
10 | #define _LTTNG_WRAPPER_USER_NAMESPACE_H | |
11 | ||
12 | #include <linux/version.h> | |
13 | #include <linux/user_namespace.h> | |
14 | ||
15 | ||
16 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0) | |
17 | ||
18 | #define lttng_current_xxuid(xxx) \ | |
19 | (from_kuid_munged(&init_user_ns, current_##xxx())) | |
20 | ||
21 | #define lttng_current_vxxuid(xxx) \ | |
22 | (from_kuid_munged(current_user_ns(), current_##xxx())) | |
23 | ||
24 | #define lttng_current_xxgid(xxx) \ | |
25 | (from_kgid_munged(&init_user_ns, current_##xxx())) | |
26 | ||
27 | #define lttng_current_vxxgid(xxx) \ | |
28 | (from_kgid_munged(current_user_ns(), current_##xxx())) | |
29 | ||
30 | #else | |
31 | ||
32 | #define lttng_current_xxuid(xxx) (current_##xxx()) | |
33 | ||
34 | #define lttng_current_vxxuid(xxx) \ | |
35 | (user_ns_map_uid(current_user_ns(), current_cred(), current_##xxx())) | |
36 | ||
37 | #define lttng_current_xxgid(xxx) (current_##xxx()) | |
38 | ||
39 | #define lttng_current_vxxgid(xxx) \ | |
40 | (user_ns_map_gid(current_user_ns(), current_cred(), current_##xxx())) | |
41 | #endif | |
42 | ||
43 | #define lttng_current_uid() (lttng_current_xxuid(uid)) | |
44 | #define lttng_current_euid() (lttng_current_xxuid(euid)) | |
45 | #define lttng_current_suid() (lttng_current_xxuid(suid)) | |
46 | #define lttng_current_fsuid() (lttng_current_xxuid(fsuid)) | |
47 | #define lttng_current_gid() (lttng_current_xxgid(gid)) | |
48 | #define lttng_current_egid() (lttng_current_xxgid(egid)) | |
49 | #define lttng_current_sgid() (lttng_current_xxgid(sgid)) | |
50 | #define lttng_current_fsgid() (lttng_current_xxgid(fsgid)) | |
51 | ||
52 | #define lttng_current_vuid() (lttng_current_vxxuid(uid)) | |
53 | #define lttng_current_veuid() (lttng_current_vxxuid(euid)) | |
54 | #define lttng_current_vsuid() (lttng_current_vxxuid(suid)) | |
55 | #define lttng_current_vfsuid() (lttng_current_vxxuid(fsuid)) | |
56 | #define lttng_current_vgid() (lttng_current_vxxgid(gid)) | |
57 | #define lttng_current_vegid() (lttng_current_vxxgid(egid)) | |
58 | #define lttng_current_vsgid() (lttng_current_vxxgid(sgid)) | |
59 | #define lttng_current_vfsgid() (lttng_current_vxxgid(fsgid)) | |
60 | ||
61 | #endif /* _LTTNG_WRAPPER_USER_NAMESPACE_H */ |