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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
5cd068c2 SW |
2 | #ifndef CEPH_CRUSH_MAPPER_H |
3 | #define CEPH_CRUSH_MAPPER_H | |
5ecc0a0f SW |
4 | |
5 | /* | |
6 | * CRUSH functions for find rules and then mapping an input to an | |
7 | * output set. | |
8 | * | |
9 | * LGPL2 | |
10 | */ | |
11 | ||
b459be73 | 12 | #include "crush.h" |
5ecc0a0f | 13 | |
8b12d47b | 14 | extern int crush_find_rule(const struct crush_map *map, int ruleset, int type, int size); |
069f3222 ID |
15 | int crush_do_rule(const struct crush_map *map, |
16 | int ruleno, int x, int *result, int result_max, | |
17 | const __u32 *weight, int weight_max, | |
18 | void *cwin, const struct crush_choose_arg *choose_args); | |
743efcff ID |
19 | |
20 | /* | |
21 | * Returns the exact amount of workspace that will need to be used | |
22 | * for a given combination of crush_map and result_max. The caller can | |
23 | * then allocate this much on its own, either on the stack, in a | |
24 | * per-thread long-lived buffer, or however it likes. | |
25 | */ | |
26 | static inline size_t crush_work_size(const struct crush_map *map, | |
27 | int result_max) | |
28 | { | |
29 | return map->working_size + result_max * 3 * sizeof(__u32); | |
30 | } | |
66a0e2d5 ID |
31 | |
32 | void crush_init_workspace(const struct crush_map *map, void *v); | |
5ecc0a0f SW |
33 | |
34 | #endif |