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 | 27 | struct ipc_namespace { |
7eafd7c7 | 28 | atomic_t count; |
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 | |
7eafd7c7 | 64 | extern spinlock_t mq_lock; |
614b84cf | 65 | #if defined(CONFIG_POSIX_MQUEUE) || defined(CONFIG_SYSVIPC) |
ae5e1b22 | 66 | #define INIT_IPC_NS(ns) .ns = &init_ipc_ns, |
614b84cf SH |
67 | #else |
68 | #define INIT_IPC_NS(ns) | |
69 | #endif | |
b6b337ad | 70 | |
614b84cf | 71 | #ifdef CONFIG_SYSVIPC |
b6b337ad | 72 | extern int register_ipcns_notifier(struct ipc_namespace *); |
6546bc42 | 73 | extern int cond_register_ipcns_notifier(struct ipc_namespace *); |
9eefe520 | 74 | extern void unregister_ipcns_notifier(struct ipc_namespace *); |
b6b337ad | 75 | extern int ipcns_notify(unsigned long); |
b6b337ad | 76 | #else /* CONFIG_SYSVIPC */ |
614b84cf SH |
77 | static inline int register_ipcns_notifier(struct ipc_namespace *ns) |
78 | { return 0; } | |
79 | static inline int cond_register_ipcns_notifier(struct ipc_namespace *ns) | |
80 | { return 0; } | |
81 | static inline void unregister_ipcns_notifier(struct ipc_namespace *ns) { } | |
82 | static inline int ipcns_notify(unsigned long l) { return 0; } | |
b6b337ad | 83 | #endif /* CONFIG_SYSVIPC */ |
ae5e1b22 | 84 | |
614b84cf | 85 | #ifdef CONFIG_POSIX_MQUEUE |
7eafd7c7 | 86 | extern int mq_init_ns(struct ipc_namespace *ns); |
614b84cf SH |
87 | /* default values */ |
88 | #define DFLT_QUEUESMAX 256 /* max number of message queues */ | |
89 | #define DFLT_MSGMAX 10 /* max number of messages in each queue */ | |
90 | #define HARD_MSGMAX (131072/sizeof(void *)) | |
91 | #define DFLT_MSGSIZEMAX 8192 /* max message size */ | |
92 | #else | |
7eafd7c7 | 93 | static inline int mq_init_ns(struct ipc_namespace *ns) { return 0; } |
614b84cf SH |
94 | #endif |
95 | ||
96 | #if defined(CONFIG_IPC_NS) | |
ae5e1b22 | 97 | extern struct ipc_namespace *copy_ipcs(unsigned long flags, |
01b8b07a | 98 | struct ipc_namespace *ns); |
ae5e1b22 PE |
99 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) |
100 | { | |
101 | if (ns) | |
7eafd7c7 | 102 | atomic_inc(&ns->count); |
ae5e1b22 PE |
103 | return ns; |
104 | } | |
105 | ||
7eafd7c7 | 106 | extern void put_ipc_ns(struct ipc_namespace *ns); |
ae5e1b22 PE |
107 | #else |
108 | static inline struct ipc_namespace *copy_ipcs(unsigned long flags, | |
109 | struct ipc_namespace *ns) | |
110 | { | |
111 | if (flags & CLONE_NEWIPC) | |
112 | return ERR_PTR(-EINVAL); | |
113 | ||
114 | return ns; | |
115 | } | |
116 | ||
117 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) | |
118 | { | |
119 | return ns; | |
120 | } | |
121 | ||
122 | static inline void put_ipc_ns(struct ipc_namespace *ns) | |
123 | { | |
124 | } | |
125 | #endif | |
bdc8e5f8 SH |
126 | |
127 | #ifdef CONFIG_POSIX_MQUEUE_SYSCTL | |
128 | ||
129 | struct ctl_table_header; | |
130 | extern struct ctl_table_header *mq_register_sysctl_table(void); | |
131 | ||
132 | #else /* CONFIG_POSIX_MQUEUE_SYSCTL */ | |
133 | ||
134 | static inline struct ctl_table_header *mq_register_sysctl_table(void) | |
135 | { | |
136 | return NULL; | |
137 | } | |
138 | ||
139 | #endif /* CONFIG_POSIX_MQUEUE_SYSCTL */ | |
ae5e1b22 | 140 | #endif |