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review.evervolv.com / android_kernel_htc_msm8960 / bbdeffce5dfcd81628a3c43d7407cd8543ea056b / . / include / linux / utsname.h
blob: ae739d7263886106004bbcb6e56e8df40ac55579 [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
Lucas De Marchif1ecf062011-11-02 13:39:22 -0700[diff] [blame]40enum uts_proc {
41 UTS_PROC_OSTYPE,
42 UTS_PROC_OSRELEASE,
43 UTS_PROC_VERSION,
44 UTS_PROC_HOSTNAME,
45 UTS_PROC_DOMAINNAME,
46};
47
Serge E. Hallyn59607db2011-03-23 16:43:16 -0700[diff] [blame]48struct user_namespace;
49extern struct user_namespace init_user_ns;
50
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]51struct uts_namespace {
52 struct kref kref;
53 struct new_utsname name;
Serge E. Hallyn59607db2011-03-23 16:43:16 -0700[diff] [blame]54 struct user_namespace *user_ns;
Eric W. Biederman75d9a222011-06-15 10:21:48 -0700[diff] [blame]55 unsigned int proc_inum;
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]56};
57extern struct uts_namespace init_uts_ns;
58
Pavel Emelyanov58bfdd6d2008-02-08 04:18:21 -0800[diff] [blame]59#ifdef CONFIG_UTS_NS
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]60static inline void get_uts_ns(struct uts_namespace *ns)
61{
62 kref_get(&ns->kref);
63}
64
Eric W. Biederman213dd262007-07-15 23:41:15 -0700[diff] [blame]65extern struct uts_namespace *copy_utsname(unsigned long flags,
Serge E. Hallynbb96a6f2011-03-23 16:43:18 -0700[diff] [blame]66 struct task_struct *tsk);
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]67extern void free_uts_ns(struct kref *kref);
68
69static inline void put_uts_ns(struct uts_namespace *ns)
70{
71 kref_put(&ns->kref, free_uts_ns);
72}
Pavel Emelyanov58bfdd6d2008-02-08 04:18:21 -0800[diff] [blame]73#else
74static inline void get_uts_ns(struct uts_namespace *ns)
75{
76}
77
78static inline void put_uts_ns(struct uts_namespace *ns)
79{
80}
81
82static inline struct uts_namespace *copy_utsname(unsigned long flags,
Serge E. Hallynbb96a6f2011-03-23 16:43:18 -0700[diff] [blame]83 struct task_struct *tsk)
Pavel Emelyanov58bfdd6d2008-02-08 04:18:21 -0800[diff] [blame]84{
85 if (flags & CLONE_NEWUTS)
86 return ERR_PTR(-EINVAL);
87
Serge E. Hallynbb96a6f2011-03-23 16:43:18 -0700[diff] [blame]88 return tsk->nsproxy->uts_ns;
Pavel Emelyanov58bfdd6d2008-02-08 04:18:21 -0800[diff] [blame]89}
90#endif
91
Lucas De Marchif1ecf062011-11-02 13:39:22 -0700[diff] [blame]92#ifdef CONFIG_PROC_SYSCTL
93extern void uts_proc_notify(enum uts_proc proc);
94#else
95static inline void uts_proc_notify(enum uts_proc proc)
96{
97}
98#endif
99
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]100static inline struct new_utsname *utsname(void)
101{
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]102 return &current->nsproxy->uts_ns->name;
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]103}
104
105static inline struct new_utsname *init_utsname(void)
106{
Serge E. Hallyn4865ecf2006-10-02 02:18:14 -0700[diff] [blame]107 return &init_uts_ns.name;
Serge E. Hallyn0bdd7aa2006-10-02 02:18:10 -0700[diff] [blame]108}
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]110extern struct rw_semaphore uts_sem;
Cedric Le Goaterb119f132006-10-04 02:15:19 -0700[diff] [blame]111
112#endif /* __KERNEL__ */
113
114#endif /* _LINUX_UTSNAME_H */