Merge branch 'master' of git://oak/home/sfr/kernels/iseries/work

[linux-2.6] / include / linux / ipc.h

diff --git a/include/linux/ipc.h b/include/linux/ipc.h
index b291189737e747178b664d1d312e8b737442d790..d9e2b3f36c35906ee1606a8a6aebce565c30214e 100644 (file)
--- a/include/linux/ipc.h
+++ b/include/linux/ipc.h
@@ -2,6 +2,7 @@
 #define _LINUX_IPC_H
 
 #include <linux/types.h>
+#include <linux/kref.h>
 
 #define IPC_PRIVATE ((__kernel_key_t) 0)  
 
@@ -68,6 +69,59 @@ struct kern_ipc_perm
        void            *security;
 };
 
+struct ipc_ids;
+struct ipc_namespace {
+       struct kref     kref;
+       struct ipc_ids  *ids[3];
+
+       int             sem_ctls[4];
+       int             used_sems;
+
+       int             msg_ctlmax;
+       int             msg_ctlmnb;
+       int             msg_ctlmni;
+
+       size_t          shm_ctlmax;
+       size_t          shm_ctlall;
+       int             shm_ctlmni;
+       int             shm_tot;
+};
+
+extern struct ipc_namespace init_ipc_ns;
+
+#ifdef CONFIG_SYSVIPC
+#define INIT_IPC_NS(ns)                .ns             = &init_ipc_ns,
+#else
+#define INIT_IPC_NS(ns)
+#endif
+
+#ifdef CONFIG_IPC_NS
+extern void free_ipc_ns(struct kref *kref);
+extern int copy_ipcs(unsigned long flags, struct task_struct *tsk);
+extern int unshare_ipcs(unsigned long flags, struct ipc_namespace **ns);
+#else
+static inline int copy_ipcs(unsigned long flags, struct task_struct *tsk)
+{
+       return 0;
+}
+#endif
+
+static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
+{
+#ifdef CONFIG_IPC_NS
+       if (ns)
+               kref_get(&ns->kref);
+#endif
+       return ns;
+}
+
+static inline void put_ipc_ns(struct ipc_namespace *ns)
+{
+#ifdef CONFIG_IPC_NS
+       kref_put(&ns->kref, free_ipc_ns);
+#endif
+}
+
 #endif /* __KERNEL__ */
 
 #endif /* _LINUX_IPC_H */