2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
19 #ifndef USNIC_UIOM_INTERVAL_TREE_H_
20 #define USNIC_UIOM_INTERVAL_TREE_H_
22 #include <linux/version.h>
23 #include <linux/rbtree.h>
25 struct usnic_uiom_interval_node {
27 struct list_head link;
30 unsigned long __subtree_last;
36 usnic_uiom_interval_tree_insert(struct usnic_uiom_interval_node *node,
37 struct rb_root *root);
39 usnic_uiom_interval_tree_remove(struct usnic_uiom_interval_node *node,
40 struct rb_root *root);
41 extern struct usnic_uiom_interval_node *
42 usnic_uiom_interval_tree_iter_first(struct rb_root *root,
45 extern struct usnic_uiom_interval_node *
46 usnic_uiom_interval_tree_iter_next(struct usnic_uiom_interval_node *node,
47 unsigned long start, unsigned long last);
49 * Inserts {start...last} into {root}. If there are overlaps,
50 * nodes will be broken up and merged
52 int usnic_uiom_insert_interval(struct rb_root *root,
53 unsigned long start, unsigned long last,
56 * Removed {start...last} from {root}. The nodes removed are returned in
57 * 'removed.' The caller is responsibile for freeing memory of nodes in
60 void usnic_uiom_remove_interval(struct rb_root *root,
61 unsigned long start, unsigned long last,
62 struct list_head *removed);
64 * Returns {start...last} - {root} (relative complement of {start...last} in
65 * {root}) in diff_set sorted ascendingly
67 int usnic_uiom_get_intervals_diff(unsigned long start,
68 unsigned long last, int flags,
71 struct list_head *diff_set);
72 /* Call this to free diff_set returned by usnic_uiom_get_intervals_diff */
73 void usnic_uiom_put_interval_set(struct list_head *intervals);
74 #endif /* USNIC_UIOM_INTERVAL_TREE_H_ */