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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_UTSNAME_H |
3 | #define _LINUX_UTSNAME_H | |
4 | ||
b119f13f CLG |
5 | |
6 | #include <linux/sched.h> | |
7 | #include <linux/kref.h> | |
8 | #include <linux/nsproxy.h> | |
435d5f4b | 9 | #include <linux/ns_common.h> |
58bfdd6d | 10 | #include <linux/err.h> |
607ca46e | 11 | #include <uapi/linux/utsname.h> |
b119f13f | 12 | |
f1ecf068 LDM |
13 | enum uts_proc { |
14 | UTS_PROC_OSTYPE, | |
15 | UTS_PROC_OSRELEASE, | |
16 | UTS_PROC_VERSION, | |
17 | UTS_PROC_HOSTNAME, | |
18 | UTS_PROC_DOMAINNAME, | |
19 | }; | |
20 | ||
59607db3 SH |
21 | struct user_namespace; |
22 | extern struct user_namespace init_user_ns; | |
23 | ||
4865ecf1 SH |
24 | struct uts_namespace { |
25 | struct kref kref; | |
26 | struct new_utsname name; | |
59607db3 | 27 | struct user_namespace *user_ns; |
f7af3d1c | 28 | struct ucounts *ucounts; |
435d5f4b | 29 | struct ns_common ns; |
3859a271 | 30 | } __randomize_layout; |
4865ecf1 SH |
31 | extern struct uts_namespace init_uts_ns; |
32 | ||
58bfdd6d | 33 | #ifdef CONFIG_UTS_NS |
4865ecf1 SH |
34 | static inline void get_uts_ns(struct uts_namespace *ns) |
35 | { | |
36 | kref_get(&ns->kref); | |
37 | } | |
38 | ||
213dd266 | 39 | extern struct uts_namespace *copy_utsname(unsigned long flags, |
bcf58e72 | 40 | struct user_namespace *user_ns, struct uts_namespace *old_ns); |
4865ecf1 SH |
41 | extern void free_uts_ns(struct kref *kref); |
42 | ||
43 | static inline void put_uts_ns(struct uts_namespace *ns) | |
44 | { | |
45 | kref_put(&ns->kref, free_uts_ns); | |
46 | } | |
3ea056c5 AD |
47 | |
48 | void uts_ns_init(void); | |
58bfdd6d PE |
49 | #else |
50 | static inline void get_uts_ns(struct uts_namespace *ns) | |
51 | { | |
52 | } | |
53 | ||
54 | static inline void put_uts_ns(struct uts_namespace *ns) | |
55 | { | |
56 | } | |
57 | ||
58 | static inline struct uts_namespace *copy_utsname(unsigned long flags, | |
bcf58e72 | 59 | struct user_namespace *user_ns, struct uts_namespace *old_ns) |
58bfdd6d PE |
60 | { |
61 | if (flags & CLONE_NEWUTS) | |
62 | return ERR_PTR(-EINVAL); | |
63 | ||
bcf58e72 | 64 | return old_ns; |
58bfdd6d | 65 | } |
3ea056c5 AD |
66 | |
67 | static inline void uts_ns_init(void) | |
68 | { | |
69 | } | |
58bfdd6d PE |
70 | #endif |
71 | ||
f1ecf068 LDM |
72 | #ifdef CONFIG_PROC_SYSCTL |
73 | extern void uts_proc_notify(enum uts_proc proc); | |
74 | #else | |
75 | static inline void uts_proc_notify(enum uts_proc proc) | |
76 | { | |
77 | } | |
78 | #endif | |
79 | ||
0bdd7aab SH |
80 | static inline struct new_utsname *utsname(void) |
81 | { | |
4865ecf1 | 82 | return ¤t->nsproxy->uts_ns->name; |
0bdd7aab SH |
83 | } |
84 | ||
85 | static inline struct new_utsname *init_utsname(void) | |
86 | { | |
4865ecf1 | 87 | return &init_uts_ns.name; |
0bdd7aab SH |
88 | } |
89 | ||
1da177e4 | 90 | extern struct rw_semaphore uts_sem; |
b119f13f | 91 | |
b119f13f | 92 | #endif /* _LINUX_UTSNAME_H */ |