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review.evervolv.com / android_kernel_oneplus_msm8996 / 99b0d4b7b09edeacf4542bced5c01239375b51a9 / . / include / linux / utsname.h
blob: 69f39974c041b964c4a32bb0dead5942f191dae2 [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 {
Dan Smitha7d932a2009-06-16 15:33:33 -0700[diff] [blame]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];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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>
Pavel Emelyanov58bfdd6d2008-02-08 04:18:21 -0800[diff] [blame]38#include <linux/err.h>
Cedric Le Goaterb119f132006-10-04 02:15:19 -0700[diff] [blame]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
Pavel Emelyanov58bfdd6d2008-02-08 04:18:21 -0800[diff] [blame]46#ifdef CONFIG_UTS_NS
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]47static inline void get_uts_ns(struct uts_namespace *ns)
48{
49 kref_get(&ns->kref);
50}
51
Eric W. Biederman213dd262007-07-15 23:41:15 -0700[diff] [blame]52extern struct uts_namespace *copy_utsname(unsigned long flags,
53 struct uts_namespace *ns);
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]54extern void free_uts_ns(struct kref *kref);
55
56static inline void put_uts_ns(struct uts_namespace *ns)
57{
58 kref_put(&ns->kref, free_uts_ns);
59}
Pavel Emelyanov58bfdd6d2008-02-08 04:18:21 -0800[diff] [blame]60#else
61static inline void get_uts_ns(struct uts_namespace *ns)
62{
63}
64
65static inline void put_uts_ns(struct uts_namespace *ns)
66{
67}
68
69static 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
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]79static inline struct new_utsname *utsname(void)
80{
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]81 return &current->nsproxy->uts_ns->name;
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]82}
83
84static inline struct new_utsname *init_utsname(void)
85{
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]86 return &init_uts_ns.name;
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]87}
88
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]89extern struct rw_semaphore uts_sem;
Cedric Le Goaterb119f132006-10-04 02:15:19 -0700[diff] [blame]90
91#endif /* __KERNEL__ */
92
93#endif /* _LINUX_UTSNAME_H */