projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ae5e1b22 PE |
1 | #ifndef __IPC_NAMESPACE_H__ |
| 2 | #define __IPC_NAMESPACE_H__ | |
| 3 | ||
| 4 | #include <linux/err.h> | |
| ed2ddbf8 PP |
5 | #include <linux/idr.h> |
| 6 | #include <linux/rwsem.h> | |
| b6b337ad | 7 | #include <linux/notifier.h> |
| b6b337ad ND |
8 | |
| 9 | /* | |
| 10 | * ipc namespace events | |
| 11 | */ | |
| 12 | #define IPCNS_MEMCHANGED 0x00000001 /* Notify lowmem size changed */ | |
| e2c284d8 ND |
13 | #define IPCNS_CREATED 0x00000002 /* Notify new ipc namespace created */ |
| 14 | #define IPCNS_REMOVED 0x00000003 /* Notify ipc namespace removed */ | |
| b6b337ad ND |
15 | |
| 16 | #define IPCNS_CALLBACK_PRI 0 | |
| 17 | ||
| ed2ddbf8 PP |
18 | |
| 19 | struct ipc_ids { | |
| 20 | int in_use; | |
| 21 | unsigned short seq; | |
| 22 | unsigned short seq_max; | |
| 23 | struct rw_semaphore rw_mutex; | |
| 24 | struct idr ipcs_idr; | |
| 25 | }; | |
| ae5e1b22 | 26 | |
| ae5e1b22 PE |
27 | struct ipc_namespace { |
| 28 | struct kref kref; | |
| ed2ddbf8 | 29 | struct ipc_ids ids[3]; |
| ae5e1b22 PE |
30 | |
| 31 | int sem_ctls[4]; | |
| 32 | int used_sems; | |
| 33 | ||
| 34 | int msg_ctlmax; | |
| 35 | int msg_ctlmnb; | |
| 36 | int msg_ctlmni; | |
| 37 | atomic_t msg_bytes; | |
| 38 | atomic_t msg_hdrs; | |
| 39 | ||
| 40 | size_t shm_ctlmax; | |
| 41 | size_t shm_ctlall; | |
| 42 | int shm_ctlmni; | |
| 43 | int shm_tot; | |
| b6b337ad | 44 | |
| b6b337ad | 45 | struct notifier_block ipcns_nb; |
| ae5e1b22 PE |
46 | }; |
| 47 | ||
| 48 | extern struct ipc_namespace init_ipc_ns; | |
| 4d89dc6a | 49 | extern atomic_t nr_ipc_ns; |
| ae5e1b22 PE |
50 | |
| 51 | #ifdef CONFIG_SYSVIPC | |
| 52 | #define INIT_IPC_NS(ns) .ns = &init_ipc_ns, | |
| b6b337ad | 53 | |
| b6b337ad ND |
54 | extern int register_ipcns_notifier(struct ipc_namespace *); |
| 55 | extern int unregister_ipcns_notifier(struct ipc_namespace *); | |
| 56 | extern int ipcns_notify(unsigned long); | |
| 57 | ||
| b6b337ad | 58 | #else /* CONFIG_SYSVIPC */ |
| ae5e1b22 | 59 | #define INIT_IPC_NS(ns) |
| b6b337ad | 60 | #endif /* CONFIG_SYSVIPC */ |
| ae5e1b22 PE |
61 | |
| 62 | #if defined(CONFIG_SYSVIPC) && defined(CONFIG_IPC_NS) | |
| 63 | extern void free_ipc_ns(struct kref *kref); | |
| 64 | extern struct ipc_namespace *copy_ipcs(unsigned long flags, | |
| 01b8b07a PP |
65 | struct ipc_namespace *ns); |
| 66 | extern void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, | |
| 67 | void (*free)(struct ipc_namespace *, | |
| 68 | struct kern_ipc_perm *)); | |
| ae5e1b22 PE |
69 | |
| 70 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | |
| 71 | { | |
| 72 | if (ns) | |
| 73 | kref_get(&ns->kref); | |
| 74 | return ns; | |
| 75 | } | |
| 76 | ||
| 77 | static inline void put_ipc_ns(struct ipc_namespace *ns) | |
| 78 | { | |
| 79 | kref_put(&ns->kref, free_ipc_ns); | |
| 80 | } | |
| 81 | #else | |
| 82 | static inline struct ipc_namespace *copy_ipcs(unsigned long flags, | |
| 83 | struct ipc_namespace *ns) | |
| 84 | { | |
| 85 | if (flags & CLONE_NEWIPC) | |
| 86 | return ERR_PTR(-EINVAL); | |
| 87 | ||
| 88 | return ns; | |
| 89 | } | |
| 90 | ||
| 91 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | |
| 92 | { | |
| 93 | return ns; | |
| 94 | } | |
| 95 | ||
| 96 | static inline void put_ipc_ns(struct ipc_namespace *ns) | |
| 97 | { | |
| 98 | } | |
| 99 | #endif | |
| 100 | #endif |