Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_UTSNAME_H |
| 2 | #define _LINUX_UTSNAME_H |
| 3 | |
Serge E. Hallyn | 4865ecf | 2006-10-02 02:18:14 -0700 | [diff] [blame] | 4 | #include <linux/sched.h> |
| 5 | #include <linux/kref.h> |
| 6 | #include <linux/nsproxy.h> |
| 7 | #include <asm/atomic.h> |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #define __OLD_UTS_LEN 8 |
| 10 | |
| 11 | struct oldold_utsname { |
| 12 | char sysname[9]; |
| 13 | char nodename[9]; |
| 14 | char release[9]; |
| 15 | char version[9]; |
| 16 | char machine[9]; |
| 17 | }; |
| 18 | |
| 19 | #define __NEW_UTS_LEN 64 |
| 20 | |
| 21 | struct old_utsname { |
| 22 | char sysname[65]; |
| 23 | char nodename[65]; |
| 24 | char release[65]; |
| 25 | char version[65]; |
| 26 | char machine[65]; |
| 27 | }; |
| 28 | |
| 29 | struct new_utsname { |
| 30 | char sysname[65]; |
| 31 | char nodename[65]; |
| 32 | char release[65]; |
| 33 | char version[65]; |
| 34 | char machine[65]; |
| 35 | char domainname[65]; |
| 36 | }; |
| 37 | |
Serge E. Hallyn | 4865ecf | 2006-10-02 02:18:14 -0700 | [diff] [blame] | 38 | struct uts_namespace { |
| 39 | struct kref kref; |
| 40 | struct new_utsname name; |
| 41 | }; |
| 42 | extern struct uts_namespace init_uts_ns; |
| 43 | |
| 44 | static inline void get_uts_ns(struct uts_namespace *ns) |
| 45 | { |
| 46 | kref_get(&ns->kref); |
| 47 | } |
| 48 | |
| 49 | #ifdef CONFIG_UTS_NS |
Serge E. Hallyn | 071df10 | 2006-10-02 02:18:17 -0700 | [diff] [blame] | 50 | extern int unshare_utsname(unsigned long unshare_flags, |
| 51 | struct uts_namespace **new_uts); |
Serge E. Hallyn | 4865ecf | 2006-10-02 02:18:14 -0700 | [diff] [blame] | 52 | extern int copy_utsname(int flags, struct task_struct *tsk); |
| 53 | extern void free_uts_ns(struct kref *kref); |
| 54 | |
| 55 | static inline void put_uts_ns(struct uts_namespace *ns) |
| 56 | { |
| 57 | kref_put(&ns->kref, free_uts_ns); |
| 58 | } |
| 59 | #else |
Serge E. Hallyn | 071df10 | 2006-10-02 02:18:17 -0700 | [diff] [blame] | 60 | static inline int unshare_utsname(unsigned long unshare_flags, |
| 61 | struct uts_namespace **new_uts) |
| 62 | { |
| 63 | if (unshare_flags & CLONE_NEWUTS) |
| 64 | return -EINVAL; |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
Serge E. Hallyn | 4865ecf | 2006-10-02 02:18:14 -0700 | [diff] [blame] | 69 | static inline int copy_utsname(int flags, struct task_struct *tsk) |
| 70 | { |
| 71 | return 0; |
| 72 | } |
| 73 | static inline void put_uts_ns(struct uts_namespace *ns) |
| 74 | { |
| 75 | } |
| 76 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Serge E. Hallyn | 0bdd7aa | 2006-10-02 02:18:10 -0700 | [diff] [blame] | 78 | static inline struct new_utsname *utsname(void) |
| 79 | { |
Serge E. Hallyn | 4865ecf | 2006-10-02 02:18:14 -0700 | [diff] [blame] | 80 | return ¤t->nsproxy->uts_ns->name; |
Serge E. Hallyn | 0bdd7aa | 2006-10-02 02:18:10 -0700 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | static inline struct new_utsname *init_utsname(void) |
| 84 | { |
Serge E. Hallyn | 4865ecf | 2006-10-02 02:18:14 -0700 | [diff] [blame] | 85 | return &init_uts_ns.name; |
Serge E. Hallyn | 0bdd7aa | 2006-10-02 02:18:10 -0700 | [diff] [blame] | 86 | } |
| 87 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | extern struct rw_semaphore uts_sem; |
| 89 | #endif |