LU-6602 osp: change lgh_hdr_lock to mutex

[fs/lustre-release.git] / lustre / include / interval_tree.h

diff --git a/lustre/include/interval_tree.h b/lustre/include/interval_tree.h
index 5810eba..82ccea1 100644 (file)
--- a/lustre/include/interval_tree.h
+++ b/lustre/include/interval_tree.h
@@ -1,6 +1,4 @@
-/* -*- 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.
@@ -16,8 +14,8 @@
  * 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 [sun.com URL with a
- * copy of GPLv2].
+ * 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
@@ -26,7 +24,7 @@
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  */
 /*
@@ -42,15 +40,16 @@
 #ifndef _INTERVAL_H__
 #define _INTERVAL_H__
 
-#include <libcfs/types.h>  /* __u8, __u64 etc. */
 #include <libcfs/libcfs.h>   /* LASSERT. */
 
 struct interval_node {
         struct interval_node   *in_left;
         struct interval_node   *in_right;
         struct interval_node   *in_parent;
-        __u8                    in_color;
-        __u8                    res1[7];  /* tags, 8-bytes aligned */
+        unsigned                in_color:1,
+                                in_intree:1, /** set if the node is in tree */
+                                in_res1:30;
+        __u8                    in_res2[4];  /** tags, 8-bytes aligned */
         __u64                   in_max_high;
         struct interval_node_extent {
                 __u64 start;
@@ -63,6 +62,11 @@ enum interval_iter {
         INTERVAL_ITER_STOP = 2
 };
 
+static inline int interval_is_intree(struct interval_node *node)
+{
+        return node->in_intree == 1;
+}
+
 static inline __u64 interval_low(struct interval_node *node)
 {
         return node->in_extent.start;
@@ -82,6 +86,13 @@ static inline void interval_set(struct interval_node *node,
         node->in_max_high = end;
 }
 
+static inline void interval_init(struct interval_node *node)
+{
+       memset(node, 0, sizeof(*node));
+}
+
+int node_equal(struct interval_node *n1, struct interval_node *n2);
+
 /* Rules to write an interval callback.
  *  - the callback returns INTERVAL_ITER_STOP when it thinks the iteration
  *    should be stopped. It will then cause the iteration function to return