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/*
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef USNIC_UIOM_INTERVAL_TREE_H_
#define USNIC_UIOM_INTERVAL_TREE_H_
#include <linux/rbtree.h>
struct usnic_uiom_interval_node {
struct rb_node rb;
struct list_head link;
unsigned long start;
unsigned long last;
unsigned long __subtree_last;
unsigned int ref_cnt;
int flags;
};
extern void
usnic_uiom_interval_tree_insert(struct usnic_uiom_interval_node *node,
struct rb_root *root);
extern void
usnic_uiom_interval_tree_remove(struct usnic_uiom_interval_node *node,
struct rb_root *root);
extern struct usnic_uiom_interval_node *
usnic_uiom_interval_tree_iter_first(struct rb_root *root,
unsigned long start,
unsigned long last);
extern struct usnic_uiom_interval_node *
usnic_uiom_interval_tree_iter_next(struct usnic_uiom_interval_node *node,
unsigned long start, unsigned long last);
/*
* Inserts {start...last} into {root}. If there are overlaps,
* nodes will be broken up and merged
*/
int usnic_uiom_insert_interval(struct rb_root *root,
unsigned long start, unsigned long last,
int flags);
/*
* Removed {start...last} from {root}. The nodes removed are returned in
* 'removed.' The caller is responsibile for freeing memory of nodes in
* 'removed.'
*/
void usnic_uiom_remove_interval(struct rb_root *root,
unsigned long start, unsigned long last,
struct list_head *removed);
/*
* Returns {start...last} - {root} (relative complement of {start...last} in
* {root}) in diff_set sorted ascendingly
*/
int usnic_uiom_get_intervals_diff(unsigned long start,
unsigned long last, int flags,
int flag_mask,
struct rb_root *root,
struct list_head *diff_set);
/* Call this to free diff_set returned by usnic_uiom_get_intervals_diff */
void usnic_uiom_put_interval_set(struct list_head *intervals);
#endif /* USNIC_UIOM_INTERVAL_TREE_H_ */
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