diff options
Diffstat (limited to 'include/linux/ipc_namespace.h')
-rw-r--r-- | include/linux/ipc_namespace.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h new file mode 100644 index 00000000000..a491fc9dd23 --- /dev/null +++ b/include/linux/ipc_namespace.h | |||
@@ -0,0 +1,69 @@ | |||
1 | #ifndef __IPC_NAMESPACE_H__ | ||
2 | #define __IPC_NAMESPACE_H__ | ||
3 | |||
4 | #include <linux/err.h> | ||
5 | |||
6 | struct ipc_ids; | ||
7 | struct ipc_namespace { | ||
8 | struct kref kref; | ||
9 | struct ipc_ids *ids[3]; | ||
10 | |||
11 | int sem_ctls[4]; | ||
12 | int used_sems; | ||
13 | |||
14 | int msg_ctlmax; | ||
15 | int msg_ctlmnb; | ||
16 | int msg_ctlmni; | ||
17 | atomic_t msg_bytes; | ||
18 | atomic_t msg_hdrs; | ||
19 | |||
20 | size_t shm_ctlmax; | ||
21 | size_t shm_ctlall; | ||
22 | int shm_ctlmni; | ||
23 | int shm_tot; | ||
24 | }; | ||
25 | |||
26 | extern struct ipc_namespace init_ipc_ns; | ||
27 | |||
28 | #ifdef CONFIG_SYSVIPC | ||
29 | #define INIT_IPC_NS(ns) .ns = &init_ipc_ns, | ||
30 | #else | ||
31 | #define INIT_IPC_NS(ns) | ||
32 | #endif | ||
33 | |||
34 | #if defined(CONFIG_SYSVIPC) && defined(CONFIG_IPC_NS) | ||
35 | extern void free_ipc_ns(struct kref *kref); | ||
36 | extern struct ipc_namespace *copy_ipcs(unsigned long flags, | ||
37 | struct ipc_namespace *ns); | ||
38 | |||
39 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | ||
40 | { | ||
41 | if (ns) | ||
42 | kref_get(&ns->kref); | ||
43 | return ns; | ||
44 | } | ||
45 | |||
46 | static inline void put_ipc_ns(struct ipc_namespace *ns) | ||
47 | { | ||
48 | kref_put(&ns->kref, free_ipc_ns); | ||
49 | } | ||
50 | #else | ||
51 | static inline struct ipc_namespace *copy_ipcs(unsigned long flags, | ||
52 | struct ipc_namespace *ns) | ||
53 | { | ||
54 | if (flags & CLONE_NEWIPC) | ||
55 | return ERR_PTR(-EINVAL); | ||
56 | |||
57 | return ns; | ||
58 | } | ||
59 | |||
60 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | ||
61 | { | ||
62 | return ns; | ||
63 | } | ||
64 | |||
65 | static inline void put_ipc_ns(struct ipc_namespace *ns) | ||
66 | { | ||
67 | } | ||
68 | #endif | ||
69 | #endif | ||