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gerrit-public.fairphone.software / kernel / msm-4.9 / 75683fe7153c3817bb4fd4491e2a5913af6c463e / . / include / linux / utsname.h
blob: f8d3b326e93a2f9b8a2f5bc616877a433acfa73a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1#ifndef _LINUX_UTSNAME_H
2#define _LINUX_UTSNAME_H
3
4#define __OLD_UTS_LEN 8
5
6struct 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
16struct old_utsname {
17 char sysname[65];
18 char nodename[65];
19 char release[65];
20 char version[65];
21 char machine[65];
22};
23
24struct 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
Cedric Le Goaterb119f132006-10-04 02:15:19 -0700[diff] [blame]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
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]40struct uts_namespace {
41 struct kref kref;
42 struct new_utsname name;
43};
44extern struct uts_namespace init_uts_ns;
45
46static inline void get_uts_ns(struct uts_namespace *ns)
47{
48 kref_get(&ns->kref);
49}
50
51#ifdef CONFIG_UTS_NS
Badari Pulavartye3222c42007-05-08 00:25:21 -0700[diff] [blame]52extern struct uts_namespace *copy_utsname(int flags, struct uts_namespace *ns);
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]53extern void free_uts_ns(struct kref *kref);
54
55static inline void put_uts_ns(struct uts_namespace *ns)
56{
57 kref_put(&ns->kref, free_uts_ns);
58}
59#else
Badari Pulavartye3222c42007-05-08 00:25:21 -0700[diff] [blame]60static inline struct uts_namespace *copy_utsname(int flags,
61 struct uts_namespace *ns)
Serge E. Hallyn071df102006-10-02 02:18:17 -0700[diff] [blame]62{
Badari Pulavartye3222c42007-05-08 00:25:21 -0700[diff] [blame]63 return ns;
Serge E. Hallyn071df102006-10-02 02:18:17 -0700[diff] [blame]64}
65
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]66static inline void put_uts_ns(struct uts_namespace *ns)
67{
68}
69#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]70
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]71static inline struct new_utsname *utsname(void)
72{
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]73 return &current->nsproxy->uts_ns->name;
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]74}
75
76static inline struct new_utsname *init_utsname(void)
77{
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]78 return &init_uts_ns.name;
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]79}
80
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]81extern struct rw_semaphore uts_sem;
Cedric Le Goaterb119f132006-10-04 02:15:19 -0700[diff] [blame]82
83#endif /* __KERNEL__ */
84
85#endif /* _LINUX_UTSNAME_H */