cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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usnic_uiom_interval_tree.h (3301B)

      1/*
      2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
      3 *
      4 * This software is available to you under a choice of one of two
      5 * licenses.  You may choose to be licensed under the terms of the GNU
      6 * General Public License (GPL) Version 2, available from the file
      7 * COPYING in the main directory of this source tree, or the
      8 * BSD license below:
      9 *
     10 *     Redistribution and use in source and binary forms, with or
     11 *     without modification, are permitted provided that the following
     12 *     conditions are met:
     13 *
     14 *      - Redistributions of source code must retain the above
     15 *        copyright notice, this list of conditions and the following
     16 *        disclaimer.
     17 *
     18 *      - Redistributions in binary form must reproduce the above
     19 *        copyright notice, this list of conditions and the following
     20 *        disclaimer in the documentation and/or other materials
     21 *        provided with the distribution.
     22 *
     23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     30 * SOFTWARE.
     31 *
     32 */
     33
     34#ifndef USNIC_UIOM_INTERVAL_TREE_H_
     35#define USNIC_UIOM_INTERVAL_TREE_H_
     36
     37#include <linux/rbtree.h>
     38
     39struct usnic_uiom_interval_node {
     40	struct rb_node			rb;
     41	struct list_head		link;
     42	unsigned long			start;
     43	unsigned long			last;
     44	unsigned long			__subtree_last;
     45	unsigned int			ref_cnt;
     46	int				flags;
     47};
     48
     49extern void
     50usnic_uiom_interval_tree_insert(struct usnic_uiom_interval_node *node,
     51					struct rb_root_cached *root);
     52extern void
     53usnic_uiom_interval_tree_remove(struct usnic_uiom_interval_node *node,
     54					struct rb_root_cached *root);
     55extern struct usnic_uiom_interval_node *
     56usnic_uiom_interval_tree_iter_first(struct rb_root_cached *root,
     57					unsigned long start,
     58					unsigned long last);
     59extern struct usnic_uiom_interval_node *
     60usnic_uiom_interval_tree_iter_next(struct usnic_uiom_interval_node *node,
     61			unsigned long start, unsigned long last);
     62/*
     63 * Inserts {start...last} into {root}.  If there are overlaps,
     64 * nodes will be broken up and merged
     65 */
     66int usnic_uiom_insert_interval(struct rb_root_cached *root,
     67				unsigned long start, unsigned long last,
     68				int flags);
     69/*
     70 * Removed {start...last} from {root}.  The nodes removed are returned in
     71 * 'removed.' The caller is responsibile for freeing memory of nodes in
     72 * 'removed.'
     73 */
     74void usnic_uiom_remove_interval(struct rb_root_cached *root,
     75				unsigned long start, unsigned long last,
     76				struct list_head *removed);
     77/*
     78 * Returns {start...last} - {root} (relative complement of {start...last} in
     79 * {root}) in diff_set sorted ascendingly
     80 */
     81int usnic_uiom_get_intervals_diff(unsigned long start,
     82					unsigned long last, int flags,
     83					int flag_mask,
     84					struct rb_root_cached *root,
     85					struct list_head *diff_set);
     86/* Call this to free diff_set returned by usnic_uiom_get_intervals_diff */
     87void usnic_uiom_put_interval_set(struct list_head *intervals);
     88#endif /* USNIC_UIOM_INTERVAL_TREE_H_ */