1 files changed, 36 insertions, 0 deletions

diff --git a/include/linux/ipc.h b/include/linux/ipc.h
index b291189737e7..36027b10f283 100644
--- 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 +69,41 @@ 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;
+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);
+
+static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
+{
+        if (ns)
+                kref_get(&ns->kref);
+        return ns;
+}
+
+static inline void put_ipc_ns(struct ipc_namespace *ns)
+{
+        kref_put(&ns->kref, free_ipc_ns);
+}
+
 #endif /* __KERNEL__ */
 
 #endif /* _LINUX_IPC_H */