Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 1 | #ifndef __IPC_NAMESPACE_H__ |
| 2 | #define __IPC_NAMESPACE_H__ |
| 3 | |
| 4 | #include <linux/err.h> |
Pierre Peiffer | ed2ddbf | 2008-02-08 04:18:57 -0800 | [diff] [blame] | 5 | #include <linux/idr.h> |
| 6 | #include <linux/rwsem.h> |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 7 | #include <linux/notifier.h> |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 8 | |
| 9 | /* |
| 10 | * ipc namespace events |
| 11 | */ |
| 12 | #define IPCNS_MEMCHANGED 0x00000001 /* Notify lowmem size changed */ |
Nadia Derbey | e2c284d | 2008-04-29 01:00:44 -0700 | [diff] [blame] | 13 | #define IPCNS_CREATED 0x00000002 /* Notify new ipc namespace created */ |
| 14 | #define IPCNS_REMOVED 0x00000003 /* Notify ipc namespace removed */ |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 15 | |
| 16 | #define IPCNS_CALLBACK_PRI 0 |
| 17 | |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 18 | |
Pierre Peiffer | ed2ddbf | 2008-02-08 04:18:57 -0800 | [diff] [blame] | 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 | }; |
| 26 | |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 27 | struct ipc_namespace { |
Serge E. Hallyn | 7eafd7c | 2009-04-06 19:01:10 -0700 | [diff] [blame] | 28 | atomic_t count; |
Pierre Peiffer | ed2ddbf | 2008-02-08 04:18:57 -0800 | [diff] [blame] | 29 | struct ipc_ids ids[3]; |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 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; |
Nadia Derbey | 9eefe52 | 2008-07-25 01:48:08 -0700 | [diff] [blame] | 39 | int auto_msgmni; |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 40 | |
| 41 | size_t shm_ctlmax; |
| 42 | size_t shm_ctlall; |
| 43 | int shm_ctlmni; |
| 44 | int shm_tot; |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 45 | |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 46 | struct notifier_block ipcns_nb; |
Serge E. Hallyn | 614b84c | 2009-04-06 19:01:08 -0700 | [diff] [blame] | 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 | |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 59 | }; |
| 60 | |
| 61 | extern struct ipc_namespace init_ipc_ns; |
Nadia Derbey | 4d89dc6 | 2008-04-29 01:00:40 -0700 | [diff] [blame] | 62 | extern atomic_t nr_ipc_ns; |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 63 | |
Serge E. Hallyn | 7eafd7c | 2009-04-06 19:01:10 -0700 | [diff] [blame] | 64 | extern spinlock_t mq_lock; |
Serge E. Hallyn | 614b84c | 2009-04-06 19:01:08 -0700 | [diff] [blame] | 65 | #if defined(CONFIG_POSIX_MQUEUE) || defined(CONFIG_SYSVIPC) |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 66 | #define INIT_IPC_NS(ns) .ns = &init_ipc_ns, |
Serge E. Hallyn | 614b84c | 2009-04-06 19:01:08 -0700 | [diff] [blame] | 67 | #else |
| 68 | #define INIT_IPC_NS(ns) |
| 69 | #endif |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 70 | |
Serge E. Hallyn | 614b84c | 2009-04-06 19:01:08 -0700 | [diff] [blame] | 71 | #ifdef CONFIG_SYSVIPC |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 72 | extern int register_ipcns_notifier(struct ipc_namespace *); |
Nadia Derbey | 6546bc4 | 2008-04-29 01:00:45 -0700 | [diff] [blame] | 73 | extern int cond_register_ipcns_notifier(struct ipc_namespace *); |
Nadia Derbey | 9eefe52 | 2008-07-25 01:48:08 -0700 | [diff] [blame] | 74 | extern void unregister_ipcns_notifier(struct ipc_namespace *); |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 75 | extern int ipcns_notify(unsigned long); |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 76 | #else /* CONFIG_SYSVIPC */ |
Serge E. Hallyn | 614b84c | 2009-04-06 19:01:08 -0700 | [diff] [blame] | 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; } |
Nadia Derbey | b6b337a | 2008-04-29 01:00:42 -0700 | [diff] [blame] | 83 | #endif /* CONFIG_SYSVIPC */ |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 84 | |
Serge E. Hallyn | 614b84c | 2009-04-06 19:01:08 -0700 | [diff] [blame] | 85 | #ifdef CONFIG_POSIX_MQUEUE |
Serge E. Hallyn | 7eafd7c | 2009-04-06 19:01:10 -0700 | [diff] [blame] | 86 | extern int mq_init_ns(struct ipc_namespace *ns); |
Serge E. Hallyn | 614b84c | 2009-04-06 19:01:08 -0700 | [diff] [blame] | 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 |
Serge E. Hallyn | 7eafd7c | 2009-04-06 19:01:10 -0700 | [diff] [blame] | 93 | static inline int mq_init_ns(struct ipc_namespace *ns) { return 0; } |
Serge E. Hallyn | 614b84c | 2009-04-06 19:01:08 -0700 | [diff] [blame] | 94 | #endif |
| 95 | |
| 96 | #if defined(CONFIG_IPC_NS) |
Serge E. Hallyn | 7eafd7c | 2009-04-06 19:01:10 -0700 | [diff] [blame] | 97 | extern void free_ipc_ns(struct ipc_namespace *ns); |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 98 | extern struct ipc_namespace *copy_ipcs(unsigned long flags, |
Pierre Peiffer | 01b8b07 | 2008-02-08 04:18:57 -0800 | [diff] [blame] | 99 | struct ipc_namespace *ns); |
| 100 | extern void free_ipcs(struct ipc_namespace *ns, struct ipc_ids *ids, |
| 101 | void (*free)(struct ipc_namespace *, |
| 102 | struct kern_ipc_perm *)); |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 103 | |
| 104 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) |
| 105 | { |
| 106 | if (ns) |
Serge E. Hallyn | 7eafd7c | 2009-04-06 19:01:10 -0700 | [diff] [blame] | 107 | atomic_inc(&ns->count); |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 108 | return ns; |
| 109 | } |
| 110 | |
Serge E. Hallyn | 7eafd7c | 2009-04-06 19:01:10 -0700 | [diff] [blame] | 111 | extern void put_ipc_ns(struct ipc_namespace *ns); |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 112 | #else |
| 113 | static inline struct ipc_namespace *copy_ipcs(unsigned long flags, |
| 114 | struct ipc_namespace *ns) |
| 115 | { |
| 116 | if (flags & CLONE_NEWIPC) |
| 117 | return ERR_PTR(-EINVAL); |
| 118 | |
| 119 | return ns; |
| 120 | } |
| 121 | |
| 122 | static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns) |
| 123 | { |
| 124 | return ns; |
| 125 | } |
| 126 | |
| 127 | static inline void put_ipc_ns(struct ipc_namespace *ns) |
| 128 | { |
| 129 | } |
| 130 | #endif |
Serge E. Hallyn | bdc8e5f | 2009-04-06 19:01:11 -0700 | [diff] [blame^] | 131 | |
| 132 | #ifdef CONFIG_POSIX_MQUEUE_SYSCTL |
| 133 | |
| 134 | struct ctl_table_header; |
| 135 | extern struct ctl_table_header *mq_register_sysctl_table(void); |
| 136 | |
| 137 | #else /* CONFIG_POSIX_MQUEUE_SYSCTL */ |
| 138 | |
| 139 | static inline struct ctl_table_header *mq_register_sysctl_table(void) |
| 140 | { |
| 141 | return NULL; |
| 142 | } |
| 143 | |
| 144 | #endif /* CONFIG_POSIX_MQUEUE_SYSCTL */ |
Pavel Emelyanov | ae5e1b2 | 2008-02-08 04:18:22 -0800 | [diff] [blame] | 145 | #endif |