Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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[__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];
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
40struct user_namespace;
41extern struct user_namespace init_user_ns;
42
43struct uts_namespace {
44 struct kref kref;
45 struct new_utsname name;
46 struct user_namespace *user_ns;
47};
48extern struct uts_namespace init_uts_ns;
49
50#ifdef CONFIG_UTS_NS
51static inline void get_uts_ns(struct uts_namespace *ns)
52{
53 kref_get(&ns->kref);
54}
55
56extern struct uts_namespace *copy_utsname(unsigned long flags,
57 struct task_struct *tsk);
58extern void free_uts_ns(struct kref *kref);
59
60static inline void put_uts_ns(struct uts_namespace *ns)
61{
62 kref_put(&ns->kref, free_uts_ns);
63}
64#else
65static inline void get_uts_ns(struct uts_namespace *ns)
66{
67}
68
69static inline void put_uts_ns(struct uts_namespace *ns)
70{
71}
72
73static inline struct uts_namespace *copy_utsname(unsigned long flags,
74 struct task_struct *tsk)
75{
76 if (flags & CLONE_NEWUTS)
77 return ERR_PTR(-EINVAL);
78
79 return tsk->nsproxy->uts_ns;
80}
81#endif
82
83static inline struct new_utsname *utsname(void)
84{
85 return ¤t->nsproxy->uts_ns->name;
86}
87
88static inline struct new_utsname *init_utsname(void)
89{
90 return &init_uts_ns.name;
91}
92
93extern struct rw_semaphore uts_sem;
94
95#endif /* __KERNEL__ */
96
97#endif /* _LINUX_UTSNAME_H */