projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| acce292c CLG |
1 | #ifndef _LINUX_USER_NAMESPACE_H |
| 2 | #define _LINUX_USER_NAMESPACE_H | |
| 3 | ||
| 4 | #include <linux/kref.h> | |
| 5 | #include <linux/nsproxy.h> | |
| 6 | #include <linux/sched.h> | |
| 77ec739d | 7 | #include <linux/err.h> |
| acce292c | 8 | |
| acce292c CLG |
9 | struct user_namespace { |
| 10 | struct kref kref; | |
| aeb3ae9d | 11 | struct user_namespace *parent; |
| 783291e6 EB |
12 | kuid_t owner; |
| 13 | kgid_t group; | |
| acce292c CLG |
14 | }; |
| 15 | ||
| 16 | extern struct user_namespace init_user_ns; | |
| 17 | ||
| 18 | #ifdef CONFIG_USER_NS | |
| 19 | ||
| 20 | static inline struct user_namespace *get_user_ns(struct user_namespace *ns) | |
| 21 | { | |
| 22 | if (ns) | |
| 23 | kref_get(&ns->kref); | |
| 24 | return ns; | |
| 25 | } | |
| 26 | ||
| 18b6e041 | 27 | extern int create_user_ns(struct cred *new); |
| acce292c CLG |
28 | extern void free_user_ns(struct kref *kref); |
| 29 | ||
| 30 | static inline void put_user_ns(struct user_namespace *ns) | |
| 31 | { | |
| 32 | if (ns) | |
| 33 | kref_put(&ns->kref, free_user_ns); | |
| 34 | } | |
| 35 | ||
| 5c1469de EB |
36 | uid_t user_ns_map_uid(struct user_namespace *to, const struct cred *cred, uid_t uid); |
| 37 | gid_t user_ns_map_gid(struct user_namespace *to, const struct cred *cred, gid_t gid); | |
| 38 | ||
| acce292c CLG |
39 | #else |
| 40 | ||
| 41 | static inline struct user_namespace *get_user_ns(struct user_namespace *ns) | |
| 42 | { | |
| 43 | return &init_user_ns; | |
| 44 | } | |
| 45 | ||
| 18b6e041 | 46 | static inline int create_user_ns(struct cred *new) |
| acce292c | 47 | { |
| 18b6e041 | 48 | return -EINVAL; |
| acce292c CLG |
49 | } |
| 50 | ||
| 51 | static inline void put_user_ns(struct user_namespace *ns) | |
| 52 | { | |
| 53 | } | |
| 54 | ||
| 5c1469de EB |
55 | static inline uid_t user_ns_map_uid(struct user_namespace *to, |
| 56 | const struct cred *cred, uid_t uid) | |
| 57 | { | |
| 58 | return uid; | |
| 59 | } | |
| 60 | static inline gid_t user_ns_map_gid(struct user_namespace *to, | |
| 61 | const struct cred *cred, gid_t gid) | |
| 62 | { | |
| 63 | return gid; | |
| 64 | } | |
| 65 | ||
| acce292c CLG |
66 | #endif |
| 67 | ||
| 68 | #endif /* _LINUX_USER_H */ |