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 | |
22d917d8 EB |
9 | #define UID_GID_MAP_MAX_EXTENTS 5 |
10 | ||
11 | struct uid_gid_map { /* 64 bytes -- 1 cache line */ | |
12 | u32 nr_extents; | |
13 | struct uid_gid_extent { | |
14 | u32 first; | |
15 | u32 lower_first; | |
16 | u32 count; | |
17 | } extent[UID_GID_MAP_MAX_EXTENTS]; | |
18 | }; | |
19 | ||
acce292c | 20 | struct user_namespace { |
22d917d8 EB |
21 | struct uid_gid_map uid_map; |
22 | struct uid_gid_map gid_map; | |
f76d207a | 23 | struct uid_gid_map projid_map; |
acce292c | 24 | struct kref kref; |
aeb3ae9d | 25 | struct user_namespace *parent; |
783291e6 EB |
26 | kuid_t owner; |
27 | kgid_t group; | |
acce292c CLG |
28 | }; |
29 | ||
30 | extern struct user_namespace init_user_ns; | |
31 | ||
32 | #ifdef CONFIG_USER_NS | |
33 | ||
34 | static inline struct user_namespace *get_user_ns(struct user_namespace *ns) | |
35 | { | |
36 | if (ns) | |
37 | kref_get(&ns->kref); | |
38 | return ns; | |
39 | } | |
40 | ||
18b6e041 | 41 | extern int create_user_ns(struct cred *new); |
acce292c CLG |
42 | extern void free_user_ns(struct kref *kref); |
43 | ||
44 | static inline void put_user_ns(struct user_namespace *ns) | |
45 | { | |
46 | if (ns) | |
47 | kref_put(&ns->kref, free_user_ns); | |
48 | } | |
49 | ||
22d917d8 EB |
50 | struct seq_operations; |
51 | extern struct seq_operations proc_uid_seq_operations; | |
52 | extern struct seq_operations proc_gid_seq_operations; | |
f76d207a | 53 | extern struct seq_operations proc_projid_seq_operations; |
22d917d8 EB |
54 | extern ssize_t proc_uid_map_write(struct file *, const char __user *, size_t, loff_t *); |
55 | extern ssize_t proc_gid_map_write(struct file *, const char __user *, size_t, loff_t *); | |
f76d207a | 56 | extern ssize_t proc_projid_map_write(struct file *, const char __user *, size_t, loff_t *); |
acce292c CLG |
57 | #else |
58 | ||
59 | static inline struct user_namespace *get_user_ns(struct user_namespace *ns) | |
60 | { | |
61 | return &init_user_ns; | |
62 | } | |
63 | ||
18b6e041 | 64 | static inline int create_user_ns(struct cred *new) |
acce292c | 65 | { |
18b6e041 | 66 | return -EINVAL; |
acce292c CLG |
67 | } |
68 | ||
69 | static inline void put_user_ns(struct user_namespace *ns) | |
70 | { | |
71 | } | |
72 | ||
22d917d8 EB |
73 | #endif |
74 | ||
acce292c | 75 | #endif /* _LINUX_USER_H */ |