Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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 uts_namespace {
41 struct kref kref;
42 struct new_utsname name;
43};
44extern struct uts_namespace init_uts_ns;
45
46#ifdef CONFIG_UTS_NS
47static inline void get_uts_ns(struct uts_namespace *ns)
48{
49 kref_get(&ns->kref);
50}
51
52extern struct uts_namespace *copy_utsname(unsigned long flags,
53 struct uts_namespace *ns);
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}
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
79static inline struct new_utsname *utsname(void)
80{
81 return ¤t->nsproxy->uts_ns->name;
82}
83
84static inline struct new_utsname *init_utsname(void)
85{
86 return &init_uts_ns.name;
87}
88
89extern struct rw_semaphore uts_sem;
90
91#endif /* __KERNEL__ */
92
93#endif /* _LINUX_UTSNAME_H */