__ __ __ __ _____ _ _ _____ _ _ _
| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef CEPH_CRUSH_MAPPER_H
#define CEPH_CRUSH_MAPPER_H
/*
* CRUSH functions for find rules and then mapping an input to an
* output set.
*
* LGPL2
*/
#include "crush.h"
extern int crush_find_rule(const struct crush_map *map, int ruleset, int type, int size);
int crush_do_rule(const struct crush_map *map,
int ruleno, int x, int *result, int result_max,
const __u32 *weight, int weight_max,
void *cwin, const struct crush_choose_arg *choose_args);
/*
* Returns the exact amount of workspace that will need to be used
* for a given combination of crush_map and result_max. The caller can
* then allocate this much on its own, either on the stack, in a
* per-thread long-lived buffer, or however it likes.
*/
static inline size_t crush_work_size(const struct crush_map *map,
int result_max)
{
return map->working_size + result_max * 3 * sizeof(__u32);
}
void crush_init_workspace(const struct crush_map *map, void *v);
#endif