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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 | ||
33 | #ifdef __KERNEL__ | |
34 | ||
35 | #include <linux/sched.h> | |
36 | #include <linux/kref.h> | |
37 | #include <linux/nsproxy.h> | |
38 | #include <linux/err.h> | |
39 | #include <asm/atomic.h> | |
40 | ||
41 | struct uts_namespace { | |
42 | struct kref kref; | |
43 | struct new_utsname name; | |
44 | }; | |
45 | extern struct uts_namespace init_uts_ns; | |
46 | ||
47 | #ifdef CONFIG_UTS_NS | |
48 | static inline void get_uts_ns(struct uts_namespace *ns) | |
49 | { | |
50 | kref_get(&ns->kref); | |
51 | } | |
52 | ||
53 | extern struct uts_namespace *copy_utsname(unsigned long flags, | |
54 | struct uts_namespace *ns); | |
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 | |
62 | static inline void get_uts_ns(struct uts_namespace *ns) | |
63 | { | |
64 | } | |
65 | ||
66 | static inline void put_uts_ns(struct uts_namespace *ns) | |
67 | { | |
68 | } | |
69 | ||
70 | static inline struct uts_namespace *copy_utsname(unsigned long flags, | |
71 | struct uts_namespace *ns) | |
72 | { | |
73 | if (flags & CLONE_NEWUTS) | |
74 | return ERR_PTR(-EINVAL); | |
75 | ||
76 | return ns; | |
77 | } | |
78 | #endif | |
79 | ||
80 | static inline struct new_utsname *utsname(void) | |
81 | { | |
82 | return ¤t->nsproxy->uts_ns->name; | |
83 | } | |
84 | ||
85 | static inline struct new_utsname *init_utsname(void) | |
86 | { | |
87 | return &init_uts_ns.name; | |
88 | } | |
89 | ||
90 | extern struct rw_semaphore uts_sem; | |
91 | ||
92 | #endif /* __KERNEL__ */ | |
93 | ||
94 | #endif /* _LINUX_UTSNAME_H */ |