b=17167 cfs_rcu_head cleanup in lustre source

[fs/lustre-release.git] / lustre / include / linux / lustre_handles.h

diff --git a/lustre/include/linux/lustre_handles.h b/lustre/include/linux/lustre_handles.h
index f644cf1..29eec05 100644 (file)
--- a/lustre/include/linux/lustre_handles.h
+++ b/lustre/include/linux/lustre_handles.h
@@ -1,39 +1,60 @@
-#ifndef __LINUX_HANDLES_H_
-#define __LINUX_HANDLES_H_
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#ifndef __LINUX_LUSTRE_HANDLES_H_
+#define __LINUX_LUSTRE_HANDLES_H_
+
+#ifndef __LUSTRE_HANDLES_H_
+#error Do not #include this file directly. #include <lustre_handles.h> instead
+#endif
 
 #ifdef __KERNEL__
 #include <asm/types.h>
 #include <asm/atomic.h>
 #include <linux/list.h>
-#endif
-
-typedef void (*portals_handle_addref_cb)(void *object);
-
-/* These handles are most easily used by having them appear at the very top of
- * whatever object that you want to make handles for.  ie:
- *
- * struct ldlm_lock {
- *         struct portals_handle handle;
- *         ...
- * };
- *
- * Now you're able to assign the results of cookie2handle directly to an
- * ldlm_lock.  If it's not at the top, you'll want to hack up a macro that
- * uses some offsetof() magic. */
-
-struct portals_handle {
-        struct list_head h_link;
-        __u64 h_cookie;
-        portals_handle_addref_cb h_addref;
-};
+#include <linux/random.h>
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
 
-/* handles.c */
+# ifdef HAVE_RCU
+#  include <linux/rcupdate.h> /* for rcu_head{} */
+typedef struct rcu_head cfs_rcu_head_t;
+# endif
 
-/* Add a handle to the hash table */
-void class_handle_hash(struct portals_handle *, portals_handle_addref_cb);
-void class_handle_unhash(struct portals_handle *);
-void *class_handle2object(__u64 cookie);
-int class_handle_init(void);
-void class_handle_cleanup(void);
+#endif /* ifdef __KERNEL__ */
 
 #endif