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ae5e1b22 PE |
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 |