-/* -*- 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.
* 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].
- *
- * 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.
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* 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.
*/
/*
#ifndef _INTERVAL_H__
#define _INTERVAL_H__
-#include <libcfs/types.h> /* __u8, __u64 etc. */
-#include <libcfs/libcfs.h> /* LASSERT. */
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
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;
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;
return node->in_extent.end;
}
-static inline void interval_set(struct interval_node *node,
- __u64 start, __u64 end)
+static inline int interval_set(struct interval_node *node,
+ __u64 start, __u64 end)
{
- LASSERT(start <= end);
- node->in_extent.start = start;
- node->in_extent.end = end;
- node->in_max_high = end;
+ if (start > end)
+ return -ERANGE;
+ node->in_extent.start = start;
+ node->in_extent.end = end;
+ node->in_max_high = end;
+ return 0;
}
+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