mirror of https://gitee.com/openkylin/linux.git
89 lines
3.2 KiB
C
89 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* 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_cached *root);
|
|
extern void
|
|
usnic_uiom_interval_tree_remove(struct usnic_uiom_interval_node *node,
|
|
struct rb_root_cached *root);
|
|
extern struct usnic_uiom_interval_node *
|
|
usnic_uiom_interval_tree_iter_first(struct rb_root_cached *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_cached *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_cached *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_cached *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_ */
|