Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_UTSNAME_H |
2 | #define _LINUX_UTSNAME_H | |
3 | ||
b119f13f CLG |
4 | |
5 | #include <linux/sched.h> | |
6 | #include <linux/kref.h> | |
7 | #include <linux/nsproxy.h> | |
58bfdd6d | 8 | #include <linux/err.h> |
607ca46e | 9 | #include <uapi/linux/utsname.h> |
b119f13f | 10 | |
f1ecf068 LDM |
11 | enum uts_proc { |
12 | UTS_PROC_OSTYPE, | |
13 | UTS_PROC_OSRELEASE, | |
14 | UTS_PROC_VERSION, | |
15 | UTS_PROC_HOSTNAME, | |
16 | UTS_PROC_DOMAINNAME, | |
17 | }; | |
18 | ||
59607db3 SH |
19 | struct user_namespace; |
20 | extern struct user_namespace init_user_ns; | |
21 | ||
4865ecf1 SH |
22 | struct uts_namespace { |
23 | struct kref kref; | |
24 | struct new_utsname name; | |
59607db3 | 25 | struct user_namespace *user_ns; |
4865ecf1 SH |
26 | }; |
27 | extern struct uts_namespace init_uts_ns; | |
28 | ||
58bfdd6d | 29 | #ifdef CONFIG_UTS_NS |
4865ecf1 SH |
30 | static inline void get_uts_ns(struct uts_namespace *ns) |
31 | { | |
32 | kref_get(&ns->kref); | |
33 | } | |
34 | ||
213dd266 | 35 | extern struct uts_namespace *copy_utsname(unsigned long flags, |
bb96a6f5 | 36 | struct task_struct *tsk); |
4865ecf1 SH |
37 | extern void free_uts_ns(struct kref *kref); |
38 | ||
39 | static inline void put_uts_ns(struct uts_namespace *ns) | |
40 | { | |
41 | kref_put(&ns->kref, free_uts_ns); | |
42 | } | |
58bfdd6d PE |
43 | #else |
44 | static inline void get_uts_ns(struct uts_namespace *ns) | |
45 | { | |
46 | } | |
47 | ||
48 | static inline void put_uts_ns(struct uts_namespace *ns) | |
49 | { | |
50 | } | |
51 | ||
52 | static inline struct uts_namespace *copy_utsname(unsigned long flags, | |
bb96a6f5 | 53 | struct task_struct *tsk) |
58bfdd6d PE |
54 | { |
55 | if (flags & CLONE_NEWUTS) | |
56 | return ERR_PTR(-EINVAL); | |
57 | ||
bb96a6f5 | 58 | return tsk->nsproxy->uts_ns; |
58bfdd6d PE |
59 | } |
60 | #endif | |
61 | ||
f1ecf068 LDM |
62 | #ifdef CONFIG_PROC_SYSCTL |
63 | extern void uts_proc_notify(enum uts_proc proc); | |
64 | #else | |
65 | static inline void uts_proc_notify(enum uts_proc proc) | |
66 | { | |
67 | } | |
68 | #endif | |
69 | ||
0bdd7aab SH |
70 | static inline struct new_utsname *utsname(void) |
71 | { | |
4865ecf1 | 72 | return ¤t->nsproxy->uts_ns->name; |
0bdd7aab SH |
73 | } |
74 | ||
75 | static inline struct new_utsname *init_utsname(void) | |
76 | { | |
4865ecf1 | 77 | return &init_uts_ns.name; |
0bdd7aab SH |
78 | } |
79 | ||
1da177e4 | 80 | extern struct rw_semaphore uts_sem; |
b119f13f | 81 | |
b119f13f | 82 | #endif /* _LINUX_UTSNAME_H */ |