git://bbs.cooldavid.org / net-next-2.6.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> | |
| 7 | ||
| 8 | struct ipc_ids { | |
| 9 | int in_use; | |
| 10 | unsigned short seq; | |
| 11 | unsigned short seq_max; | |
| 12 | struct rw_semaphore rw_mutex; | |
| 13 | struct idr ipcs_idr; | |
| 14 | }; | |
| ae5e1b22 | 15 | |
| ae5e1b22 PE |
16 | struct ipc_namespace { |
| 17 | struct kref kref; | |
| ed2ddbf8 | 18 | struct ipc_ids ids[3]; |
| ae5e1b22 PE |
19 | |
| 20 | int sem_ctls[4]; | |
| 21 | int used_sems; | |
| 22 | ||
| 23 | int msg_ctlmax; | |
| 24 | int msg_ctlmnb; | |
| 25 | int msg_ctlmni; | |
| 26 | atomic_t msg_bytes; | |
| 27 | atomic_t msg_hdrs; | |
| 28 | ||
| 29 | size_t shm_ctlmax; | |
| 30 | size_t shm_ctlall; | |
| 31 | int shm_ctlmni; | |
| 32 | int shm_tot; | |
| 33 | }; | |
| 34 | ||
| 35 | extern struct ipc_namespace init_ipc_ns; | |
| 36 | ||
| 37 | #ifdef CONFIG_SYSVIPC | |
| 38 | #define INIT_IPC_NS(ns) .ns = &init_ipc_ns, | |
| 39 | #else | |
| 40 | #define INIT_IPC_NS(ns) | |
| 41 | #endif | |
| 42 | ||
| 43 | #if defined(CONFIG_SYSVIPC) && defined(CONFIG_IPC_NS) | |
| 44 | extern void free_ipc_ns(struct kref *kref); | |
| 45 | extern struct ipc_namespace *copy_ipcs(unsigned long flags, | |
| 01b8b07a PP |
46 | struct ipc_namespace *ns); |
| 47 | extern void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, | |
| 48 | void (*free)(struct ipc_namespace *, | |
| 49 | struct kern_ipc_perm *)); | |
| ae5e1b22 PE |
50 | |
| 51 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | |
| 52 | { | |
| 53 | if (ns) | |
| 54 | kref_get(&ns->kref); | |
| 55 | return ns; | |
| 56 | } | |
| 57 | ||
| 58 | static inline void put_ipc_ns(struct ipc_namespace *ns) | |
| 59 | { | |
| 60 | kref_put(&ns->kref, free_ipc_ns); | |
| 61 | } | |
| 62 | #else | |
| 63 | static inline struct ipc_namespace *copy_ipcs(unsigned long flags, | |
| 64 | struct ipc_namespace *ns) | |
| 65 | { | |
| 66 | if (flags & CLONE_NEWIPC) | |
| 67 | return ERR_PTR(-EINVAL); | |
| 68 | ||
| 69 | return ns; | |
| 70 | } | |
| 71 | ||
| 72 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | |
| 73 | { | |
| 74 | return ns; | |
| 75 | } | |
| 76 | ||
| 77 | static inline void put_ipc_ns(struct ipc_namespace *ns) | |
| 78 | { | |
| 79 | } | |
| 80 | #endif | |
| 81 | #endif |