1 #ifndef _LINUX_USER_NAMESPACE_H
2 #define _LINUX_USER_NAMESPACE_H
4 #include <linux/kref.h>
5 #include <linux/nsproxy.h>
6 #include <linux/sched.h>
9 #define UIDHASH_BITS (CONFIG_BASE_SMALL ? 3 : 8)
10 #define UIDHASH_SZ (1 << UIDHASH_BITS)
12 struct user_namespace
{
14 struct hlist_head uidhash_table
[UIDHASH_SZ
];
15 struct user_struct
*root_user
;
18 extern struct user_namespace init_user_ns
;
22 static inline struct user_namespace
*get_user_ns(struct user_namespace
*ns
)
29 extern struct user_namespace
*copy_user_ns(int flags
,
30 struct user_namespace
*old_ns
);
31 extern void free_user_ns(struct kref
*kref
);
33 static inline void put_user_ns(struct user_namespace
*ns
)
36 kref_put(&ns
->kref
, free_user_ns
);
41 static inline struct user_namespace
*get_user_ns(struct user_namespace
*ns
)
46 static inline struct user_namespace
*copy_user_ns(int flags
,
47 struct user_namespace
*old_ns
)
49 if (flags
& CLONE_NEWUSER
)
50 return ERR_PTR(-EINVAL
);
55 static inline void put_user_ns(struct user_namespace
*ns
)
61 #endif /* _LINUX_USER_H */