5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
35 lines
1002 B
C
35 lines
1002 B
C
/* 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
|