/*
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* Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#ifndef USNIC_UIOM_INTERVAL_TREE_H_
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#define USNIC_UIOM_INTERVAL_TREE_H_
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#include <linux/rbtree.h>
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struct usnic_uiom_interval_node {
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struct rb_node rb;
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struct list_head link;
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unsigned long start;
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unsigned long last;
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unsigned long __subtree_last;
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unsigned int ref_cnt;
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int flags;
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};
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extern void
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usnic_uiom_interval_tree_insert(struct usnic_uiom_interval_node *node,
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struct rb_root_cached *root);
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extern void
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usnic_uiom_interval_tree_remove(struct usnic_uiom_interval_node *node,
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struct rb_root_cached *root);
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extern struct usnic_uiom_interval_node *
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usnic_uiom_interval_tree_iter_first(struct rb_root_cached *root,
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unsigned long start,
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unsigned long last);
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extern struct usnic_uiom_interval_node *
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usnic_uiom_interval_tree_iter_next(struct usnic_uiom_interval_node *node,
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unsigned long start, unsigned long last);
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/*
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* Inserts {start...last} into {root}. If there are overlaps,
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* nodes will be broken up and merged
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*/
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int usnic_uiom_insert_interval(struct rb_root_cached *root,
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unsigned long start, unsigned long last,
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int flags);
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/*
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* Removed {start...last} from {root}. The nodes removed are returned in
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* 'removed.' The caller is responsibile for freeing memory of nodes in
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* 'removed.'
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*/
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void usnic_uiom_remove_interval(struct rb_root_cached *root,
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unsigned long start, unsigned long last,
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struct list_head *removed);
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/*
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* Returns {start...last} - {root} (relative complement of {start...last} in
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* {root}) in diff_set sorted ascendingly
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*/
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int usnic_uiom_get_intervals_diff(unsigned long start,
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unsigned long last, int flags,
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int flag_mask,
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struct rb_root_cached *root,
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struct list_head *diff_set);
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/* Call this to free diff_set returned by usnic_uiom_get_intervals_diff */
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void usnic_uiom_put_interval_set(struct list_head *intervals);
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#endif /* USNIC_UIOM_INTERVAL_TREE_H_ */
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