* linux/ipc/util.h
* Copyright (C) 1999 Christoph Rohland
*
- * ipc helper functions (c) 1999 Manfred Spraul <manfreds@colorfullife.com>
+ * ipc helper functions (c) 1999 Manfred Spraul <manfred@colorfullife.com>
+ * namespaces support. 2006 OpenVZ, SWsoft Inc.
+ * Pavel Emelianov <xemul@openvz.org>
*/
#ifndef _IPC_UTIL_H
void msg_init (void);
void shm_init (void);
-struct ipc_ids {
+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);
+
+struct ipc_id_ary {
int size;
+ struct kern_ipc_perm *p[0];
+};
+
+struct ipc_ids {
int in_use;
int max_id;
unsigned short seq;
unsigned short seq_max;
- struct semaphore sem;
- struct ipc_id* entries;
+ struct mutex mutex;
+ struct ipc_id_ary nullentry;
+ struct ipc_id_ary* entries;
};
-struct ipc_id {
- struct kern_ipc_perm* p;
-};
+struct seq_file;
+#ifdef CONFIG_IPC_NS
+#define __ipc_init
+#else
+#define __ipc_init __init
+#endif
+void __ipc_init ipc_init_ids(struct ipc_ids *ids, int size);
+#ifdef CONFIG_PROC_FS
+void __init ipc_init_proc_interface(const char *path, const char *header,
+ int ids, int (*show)(struct seq_file *, void *));
+#else
+#define ipc_init_proc_interface(path, header, ids, show) do {} while (0)
+#endif
-void __init ipc_init_ids(struct ipc_ids* ids, int size);
+#define IPC_SEM_IDS 0
+#define IPC_MSG_IDS 1
+#define IPC_SHM_IDS 2
-/* must be called with ids->sem acquired.*/
+/* must be called with ids->mutex acquired.*/
int ipc_findkey(struct ipc_ids* ids, key_t key);
int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size);
void ipc_rcu_getref(void *ptr);
void ipc_rcu_putref(void *ptr);
+static inline void __ipc_fini_ids(struct ipc_ids *ids,
+ struct ipc_id_ary *entries)
+{
+ if (entries != &ids->nullentry)
+ ipc_rcu_putref(entries);
+}
+
+static inline void ipc_fini_ids(struct ipc_ids *ids)
+{
+ __ipc_fini_ids(ids, ids->entries);
+}
+
struct kern_ipc_perm* ipc_get(struct ipc_ids* ids, int id);
struct kern_ipc_perm* ipc_lock(struct ipc_ids* ids, int id);
void ipc_lock_by_ptr(struct kern_ipc_perm *ipcp);
void kernel_to_ipc64_perm(struct kern_ipc_perm *in, struct ipc64_perm *out);
void ipc64_perm_to_ipc_perm(struct ipc64_perm *in, struct ipc_perm *out);
-#if defined(__ia64__) || defined(__x86_64__) || defined(__hppa__)
+#if defined(__ia64__) || defined(__x86_64__) || defined(__hppa__) || defined(__XTENSA__)
/* On IA-64, we always use the "64-bit version" of the IPC structures. */
# define ipc_parse_version(cmd) IPC_64
#else