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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; |
98f842e6 | 26 | unsigned int proc_inum; |
4865ecf1 SH |
27 | }; |
28 | extern struct uts_namespace init_uts_ns; | |
29 | ||
58bfdd6d | 30 | #ifdef CONFIG_UTS_NS |
4865ecf1 SH |
31 | static inline void get_uts_ns(struct uts_namespace *ns) |
32 | { | |
33 | kref_get(&ns->kref); | |
34 | } | |
35 | ||
213dd266 | 36 | extern struct uts_namespace *copy_utsname(unsigned long flags, |
bcf58e72 | 37 | struct user_namespace *user_ns, struct uts_namespace *old_ns); |
4865ecf1 SH |
38 | extern void free_uts_ns(struct kref *kref); |
39 | ||
40 | static inline void put_uts_ns(struct uts_namespace *ns) | |
41 | { | |
42 | kref_put(&ns->kref, free_uts_ns); | |
43 | } | |
58bfdd6d PE |
44 | #else |
45 | static inline void get_uts_ns(struct uts_namespace *ns) | |
46 | { | |
47 | } | |
48 | ||
49 | static inline void put_uts_ns(struct uts_namespace *ns) | |
50 | { | |
51 | } | |
52 | ||
53 | static inline struct uts_namespace *copy_utsname(unsigned long flags, | |
bcf58e72 | 54 | struct user_namespace *user_ns, struct uts_namespace *old_ns) |
58bfdd6d PE |
55 | { |
56 | if (flags & CLONE_NEWUTS) | |
57 | return ERR_PTR(-EINVAL); | |
58 | ||
bcf58e72 | 59 | return old_ns; |
58bfdd6d PE |
60 | } |
61 | #endif | |
62 | ||
f1ecf068 LDM |
63 | #ifdef CONFIG_PROC_SYSCTL |
64 | extern void uts_proc_notify(enum uts_proc proc); | |
65 | #else | |
66 | static inline void uts_proc_notify(enum uts_proc proc) | |
67 | { | |
68 | } | |
69 | #endif | |
70 | ||
0bdd7aab SH |
71 | static inline struct new_utsname *utsname(void) |
72 | { | |
4865ecf1 | 73 | return ¤t->nsproxy->uts_ns->name; |
0bdd7aab SH |
74 | } |
75 | ||
76 | static inline struct new_utsname *init_utsname(void) | |
77 | { | |
4865ecf1 | 78 | return &init_uts_ns.name; |
0bdd7aab SH |
79 | } |
80 | ||
1da177e4 | 81 | extern struct rw_semaphore uts_sem; |
b119f13f | 82 | |
b119f13f | 83 | #endif /* _LINUX_UTSNAME_H */ |