ipc: optimize semget/shmget/msgget for lots of keys

[linux.git] / ipc / util.h

diff --git a/ipc/util.h b/ipc/util.h
index c692010e6f0a394d1d796e33fda3b6b5e46ca16f..80c9f51c3f07bed4bad42edec9f71177d69ff1e4 100644 (file)
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -15,8 +15,8 @@
 
 #define SEQ_MULTIPLIER (IPCMNI)
 
-void sem_init(void);
-void msg_init(void);
+int sem_init(void);
+int msg_init(void);
 void shm_init(void);
 
 struct ipc_namespace;
@@ -30,17 +30,17 @@ static inline void mq_put_mnt(struct ipc_namespace *ns) { }
 #endif
 
 #ifdef CONFIG_SYSVIPC
-void sem_init_ns(struct ipc_namespace *ns);
-void msg_init_ns(struct ipc_namespace *ns);
-void shm_init_ns(struct ipc_namespace *ns);
+int sem_init_ns(struct ipc_namespace *ns);
+int msg_init_ns(struct ipc_namespace *ns);
+int shm_init_ns(struct ipc_namespace *ns);
 
 void sem_exit_ns(struct ipc_namespace *ns);
 void msg_exit_ns(struct ipc_namespace *ns);
 void shm_exit_ns(struct ipc_namespace *ns);
 #else
-static inline void sem_init_ns(struct ipc_namespace *ns) { }
-static inline void msg_init_ns(struct ipc_namespace *ns) { }
-static inline void shm_init_ns(struct ipc_namespace *ns) { }
+static inline int sem_init_ns(struct ipc_namespace *ns) { return 0; }
+static inline int msg_init_ns(struct ipc_namespace *ns) { return 0; }
+static inline int shm_init_ns(struct ipc_namespace *ns) { return 0; }
 
 static inline void sem_exit_ns(struct ipc_namespace *ns) { }
 static inline void msg_exit_ns(struct ipc_namespace *ns) { }
@@ -79,7 +79,7 @@ struct ipc_ops {
 struct seq_file;
 struct ipc_ids;
 
-void ipc_init_ids(struct ipc_ids *);
+int ipc_init_ids(struct ipc_ids *);
 #ifdef CONFIG_PROC_FS
 void __init ipc_init_proc_interface(const char *path, const char *header,
                int ids, int (*show)(struct seq_file *, void *));
@@ -104,6 +104,9 @@ int ipc_get_maxid(struct ipc_ids *);
 /* must be called with both locks acquired. */
 void ipc_rmid(struct ipc_ids *, struct kern_ipc_perm *);
 
+/* must be called with both locks acquired. */
+void ipc_set_key_private(struct ipc_ids *, struct kern_ipc_perm *);
+
 /* must be called with ipcp locked */
 int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flg);