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 UID_GID_MAP_MAX_EXTENTS 5
11 struct uid_gid_map
{ /* 64 bytes -- 1 cache line */
13 struct uid_gid_extent
{
17 } extent
[UID_GID_MAP_MAX_EXTENTS
];
20 struct user_namespace
{
21 struct uid_gid_map uid_map
;
22 struct uid_gid_map gid_map
;
24 struct user_namespace
*parent
;
29 extern struct user_namespace init_user_ns
;
33 static inline struct user_namespace
*get_user_ns(struct user_namespace
*ns
)
40 extern int create_user_ns(struct cred
*new);
41 extern void free_user_ns(struct kref
*kref
);
43 static inline void put_user_ns(struct user_namespace
*ns
)
46 kref_put(&ns
->kref
, free_user_ns
);
49 struct seq_operations
;
50 extern struct seq_operations proc_uid_seq_operations
;
51 extern struct seq_operations proc_gid_seq_operations
;
52 extern ssize_t
proc_uid_map_write(struct file
*, const char __user
*, size_t, loff_t
*);
53 extern ssize_t
proc_gid_map_write(struct file
*, const char __user
*, size_t, loff_t
*);
56 static inline struct user_namespace
*get_user_ns(struct user_namespace
*ns
)
61 static inline int create_user_ns(struct cred
*new)
66 static inline void put_user_ns(struct user_namespace
*ns
)
72 #endif /* _LINUX_USER_H */