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Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_UTSNAME_H |
2 | #define _LINUX_UTSNAME_H | |
3 | ||
4 | #define __OLD_UTS_LEN 8 | |
5 | ||
6 | struct oldold_utsname { | |
7 | char sysname[9]; | |
8 | char nodename[9]; | |
9 | char release[9]; | |
10 | char version[9]; | |
11 | char machine[9]; | |
12 | }; | |
13 | ||
14 | #define __NEW_UTS_LEN 64 | |
15 | ||
16 | struct old_utsname { | |
17 | char sysname[65]; | |
18 | char nodename[65]; | |
19 | char release[65]; | |
20 | char version[65]; | |
21 | char machine[65]; | |
22 | }; | |
23 | ||
24 | struct new_utsname { | |
25 | char sysname[65]; | |
26 | char nodename[65]; | |
27 | char release[65]; | |
28 | char version[65]; | |
29 | char machine[65]; | |
30 | char domainname[65]; | |
31 | }; | |
32 | ||
b119f13f CLG |
33 | #ifdef __KERNEL__ |
34 | ||
35 | #include <linux/sched.h> | |
36 | #include <linux/kref.h> | |
37 | #include <linux/nsproxy.h> | |
38 | #include <asm/atomic.h> | |
39 | ||
4865ecf1 SH |
40 | struct uts_namespace { |
41 | struct kref kref; | |
42 | struct new_utsname name; | |
43 | }; | |
44 | extern struct uts_namespace init_uts_ns; | |
45 | ||
46 | static inline void get_uts_ns(struct uts_namespace *ns) | |
47 | { | |
48 | kref_get(&ns->kref); | |
49 | } | |
50 | ||
51 | #ifdef CONFIG_UTS_NS | |
071df104 SH |
52 | extern int unshare_utsname(unsigned long unshare_flags, |
53 | struct uts_namespace **new_uts); | |
4865ecf1 SH |
54 | extern int copy_utsname(int flags, struct task_struct *tsk); |
55 | extern void free_uts_ns(struct kref *kref); | |
56 | ||
57 | static inline void put_uts_ns(struct uts_namespace *ns) | |
58 | { | |
59 | kref_put(&ns->kref, free_uts_ns); | |
60 | } | |
61 | #else | |
071df104 SH |
62 | static inline int unshare_utsname(unsigned long unshare_flags, |
63 | struct uts_namespace **new_uts) | |
64 | { | |
65 | if (unshare_flags & CLONE_NEWUTS) | |
66 | return -EINVAL; | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
4865ecf1 SH |
71 | static inline int copy_utsname(int flags, struct task_struct *tsk) |
72 | { | |
78d832f6 SH |
73 | if (flags & CLONE_NEWUTS) |
74 | return -EINVAL; | |
4865ecf1 SH |
75 | return 0; |
76 | } | |
77 | static inline void put_uts_ns(struct uts_namespace *ns) | |
78 | { | |
79 | } | |
80 | #endif | |
1da177e4 | 81 | |
0bdd7aab SH |
82 | static inline struct new_utsname *utsname(void) |
83 | { | |
4865ecf1 | 84 | return ¤t->nsproxy->uts_ns->name; |
0bdd7aab SH |
85 | } |
86 | ||
87 | static inline struct new_utsname *init_utsname(void) | |
88 | { | |
4865ecf1 | 89 | return &init_uts_ns.name; |
0bdd7aab SH |
90 | } |
91 | ||
1da177e4 | 92 | extern struct rw_semaphore uts_sem; |
b119f13f CLG |
93 | |
94 | #endif /* __KERNEL__ */ | |
95 | ||
96 | #endif /* _LINUX_UTSNAME_H */ |