1 #ifndef CEPH_CRUSH_MAPPER_H
2 #define CEPH_CRUSH_MAPPER_H
5 * CRUSH functions for find rules and then mapping an input to an
13 extern int crush_find_rule(const struct crush_map *map, int ruleset, int type, int size);
14 int crush_do_rule(const struct crush_map *map,
15 int ruleno, int x, int *result, int result_max,
16 const __u32 *weight, int weight_max,
17 void *cwin, const struct crush_choose_arg *choose_args);
20 * Returns the exact amount of workspace that will need to be used
21 * for a given combination of crush_map and result_max. The caller can
22 * then allocate this much on its own, either on the stack, in a
23 * per-thread long-lived buffer, or however it likes.
25 static inline size_t crush_work_size(const struct crush_map *map,
28 return map->working_size + result_max * 3 * sizeof(__u32);
31 void crush_init_workspace(const struct crush_map *map, void *v);