Commit | Line | Data |
---|---|---|
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 { | |
a7d932af DS |
25 | char sysname[__NEW_UTS_LEN + 1]; |
26 | char nodename[__NEW_UTS_LEN + 1]; | |
27 | char release[__NEW_UTS_LEN + 1]; | |
28 | char version[__NEW_UTS_LEN + 1]; | |
29 | char machine[__NEW_UTS_LEN + 1]; | |
30 | char domainname[__NEW_UTS_LEN + 1]; | |
1da177e4 LT |
31 | }; |
32 | ||
b119f13f CLG |
33 | #ifdef __KERNEL__ |
34 | ||
35 | #include <linux/sched.h> | |
36 | #include <linux/kref.h> | |
37 | #include <linux/nsproxy.h> | |
58bfdd6d | 38 | #include <linux/err.h> |
b119f13f | 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 | ||
58bfdd6d | 46 | #ifdef CONFIG_UTS_NS |
4865ecf1 SH |
47 | static inline void get_uts_ns(struct uts_namespace *ns) |
48 | { | |
49 | kref_get(&ns->kref); | |
50 | } | |
51 | ||
213dd266 EB |
52 | extern struct uts_namespace *copy_utsname(unsigned long flags, |
53 | struct uts_namespace *ns); | |
4865ecf1 SH |
54 | extern void free_uts_ns(struct kref *kref); |
55 | ||
56 | static inline void put_uts_ns(struct uts_namespace *ns) | |
57 | { | |
58 | kref_put(&ns->kref, free_uts_ns); | |
59 | } | |
58bfdd6d PE |
60 | #else |
61 | static inline void get_uts_ns(struct uts_namespace *ns) | |
62 | { | |
63 | } | |
64 | ||
65 | static inline void put_uts_ns(struct uts_namespace *ns) | |
66 | { | |
67 | } | |
68 | ||
69 | static inline struct uts_namespace *copy_utsname(unsigned long flags, | |
70 | struct uts_namespace *ns) | |
71 | { | |
72 | if (flags & CLONE_NEWUTS) | |
73 | return ERR_PTR(-EINVAL); | |
74 | ||
75 | return ns; | |
76 | } | |
77 | #endif | |
78 | ||
0bdd7aab SH |
79 | static inline struct new_utsname *utsname(void) |
80 | { | |
4865ecf1 | 81 | return ¤t->nsproxy->uts_ns->name; |
0bdd7aab SH |
82 | } |
83 | ||
84 | static inline struct new_utsname *init_utsname(void) | |
85 | { | |
4865ecf1 | 86 | return &init_uts_ns.name; |
0bdd7aab SH |
87 | } |
88 | ||
1da177e4 | 89 | extern struct rw_semaphore uts_sem; |
b119f13f CLG |
90 | |
91 | #endif /* __KERNEL__ */ | |
92 | ||
93 | #endif /* _LINUX_UTSNAME_H */ |