Commit | Line | Data |
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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; | |
9eefe520 | 39 | int auto_msgmni; |
ae5e1b22 PE |
40 | |
41 | size_t shm_ctlmax; | |
42 | size_t shm_ctlall; | |
43 | int shm_ctlmni; | |
44 | int shm_tot; | |
b6b337ad | 45 | |
b6b337ad | 46 | struct notifier_block ipcns_nb; |
614b84cf SH |
47 | |
48 | /* The kern_mount of the mqueuefs sb. We take a ref on it */ | |
49 | struct vfsmount *mq_mnt; | |
50 | ||
51 | /* # queues in this ns, protected by mq_lock */ | |
52 | unsigned int mq_queues_count; | |
53 | ||
54 | /* next fields are set through sysctl */ | |
55 | unsigned int mq_queues_max; /* initialized to DFLT_QUEUESMAX */ | |
56 | unsigned int mq_msg_max; /* initialized to DFLT_MSGMAX */ | |
57 | unsigned int mq_msgsize_max; /* initialized to DFLT_MSGSIZEMAX */ | |
58 | ||
ae5e1b22 PE |
59 | }; |
60 | ||
61 | extern struct ipc_namespace init_ipc_ns; | |
4d89dc6a | 62 | extern atomic_t nr_ipc_ns; |
ae5e1b22 | 63 | |
614b84cf | 64 | #if defined(CONFIG_POSIX_MQUEUE) || defined(CONFIG_SYSVIPC) |
ae5e1b22 | 65 | #define INIT_IPC_NS(ns) .ns = &init_ipc_ns, |
614b84cf SH |
66 | #else |
67 | #define INIT_IPC_NS(ns) | |
68 | #endif | |
b6b337ad | 69 | |
614b84cf | 70 | #ifdef CONFIG_SYSVIPC |
b6b337ad | 71 | extern int register_ipcns_notifier(struct ipc_namespace *); |
6546bc42 | 72 | extern int cond_register_ipcns_notifier(struct ipc_namespace *); |
9eefe520 | 73 | extern void unregister_ipcns_notifier(struct ipc_namespace *); |
b6b337ad | 74 | extern int ipcns_notify(unsigned long); |
b6b337ad | 75 | #else /* CONFIG_SYSVIPC */ |
614b84cf SH |
76 | static inline int register_ipcns_notifier(struct ipc_namespace *ns) |
77 | { return 0; } | |
78 | static inline int cond_register_ipcns_notifier(struct ipc_namespace *ns) | |
79 | { return 0; } | |
80 | static inline void unregister_ipcns_notifier(struct ipc_namespace *ns) { } | |
81 | static inline int ipcns_notify(unsigned long l) { return 0; } | |
b6b337ad | 82 | #endif /* CONFIG_SYSVIPC */ |
ae5e1b22 | 83 | |
614b84cf SH |
84 | #ifdef CONFIG_POSIX_MQUEUE |
85 | extern void mq_init_ns(struct ipc_namespace *ns); | |
86 | /* default values */ | |
87 | #define DFLT_QUEUESMAX 256 /* max number of message queues */ | |
88 | #define DFLT_MSGMAX 10 /* max number of messages in each queue */ | |
89 | #define HARD_MSGMAX (131072/sizeof(void *)) | |
90 | #define DFLT_MSGSIZEMAX 8192 /* max message size */ | |
91 | #else | |
92 | #define mq_init_ns(ns) ((void) 0) | |
93 | #endif | |
94 | ||
95 | #if defined(CONFIG_IPC_NS) | |
ae5e1b22 PE |
96 | extern void free_ipc_ns(struct kref *kref); |
97 | extern struct ipc_namespace *copy_ipcs(unsigned long flags, | |
01b8b07a PP |
98 | struct ipc_namespace *ns); |
99 | extern void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, | |
100 | void (*free)(struct ipc_namespace *, | |
101 | struct kern_ipc_perm *)); | |
ae5e1b22 PE |
102 | |
103 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | |
104 | { | |
105 | if (ns) | |
106 | kref_get(&ns->kref); | |
107 | return ns; | |
108 | } | |
109 | ||
110 | static inline void put_ipc_ns(struct ipc_namespace *ns) | |
111 | { | |
112 | kref_put(&ns->kref, free_ipc_ns); | |
113 | } | |
114 | #else | |
115 | static inline struct ipc_namespace *copy_ipcs(unsigned long flags, | |
116 | struct ipc_namespace *ns) | |
117 | { | |
118 | if (flags & CLONE_NEWIPC) | |
119 | return ERR_PTR(-EINVAL); | |
120 | ||
121 | return ns; | |
122 | } | |
123 | ||
124 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | |
125 | { | |
126 | return ns; | |
127 | } | |
128 | ||
129 | static inline void put_ipc_ns(struct ipc_namespace *ns) | |
130 | { | |
131 | } | |
132 | #endif | |
133 | #endif |