1 // SPDX-License-Identifier: GPL-2.0
3 # include <linux/slab.h>
4 # include <linux/crush/crush.h>
6 # include "crush_compat.h"
10 const char *crush_bucket_alg_name(int alg)
13 case CRUSH_BUCKET_UNIFORM: return "uniform";
14 case CRUSH_BUCKET_LIST: return "list";
15 case CRUSH_BUCKET_TREE: return "tree";
16 case CRUSH_BUCKET_STRAW: return "straw";
17 case CRUSH_BUCKET_STRAW2: return "straw2";
18 default: return "unknown";
23 * crush_get_bucket_item_weight - Get weight of an item in given bucket
25 * @p: item index in bucket
27 int crush_get_bucket_item_weight(const struct crush_bucket *b, int p)
29 if ((__u32)p >= b->size)
33 case CRUSH_BUCKET_UNIFORM:
34 return ((struct crush_bucket_uniform *)b)->item_weight;
35 case CRUSH_BUCKET_LIST:
36 return ((struct crush_bucket_list *)b)->item_weights[p];
37 case CRUSH_BUCKET_TREE:
38 return ((struct crush_bucket_tree *)b)->node_weights[crush_calc_tree_node(p)];
39 case CRUSH_BUCKET_STRAW:
40 return ((struct crush_bucket_straw *)b)->item_weights[p];
41 case CRUSH_BUCKET_STRAW2:
42 return ((struct crush_bucket_straw2 *)b)->item_weights[p];
47 void crush_destroy_bucket_uniform(struct crush_bucket_uniform *b)
53 void crush_destroy_bucket_list(struct crush_bucket_list *b)
55 kfree(b->item_weights);
56 kfree(b->sum_weights);
61 void crush_destroy_bucket_tree(struct crush_bucket_tree *b)
64 kfree(b->node_weights);
68 void crush_destroy_bucket_straw(struct crush_bucket_straw *b)
71 kfree(b->item_weights);
76 void crush_destroy_bucket_straw2(struct crush_bucket_straw2 *b)
78 kfree(b->item_weights);
83 void crush_destroy_bucket(struct crush_bucket *b)
86 case CRUSH_BUCKET_UNIFORM:
87 crush_destroy_bucket_uniform((struct crush_bucket_uniform *)b);
89 case CRUSH_BUCKET_LIST:
90 crush_destroy_bucket_list((struct crush_bucket_list *)b);
92 case CRUSH_BUCKET_TREE:
93 crush_destroy_bucket_tree((struct crush_bucket_tree *)b);
95 case CRUSH_BUCKET_STRAW:
96 crush_destroy_bucket_straw((struct crush_bucket_straw *)b);
98 case CRUSH_BUCKET_STRAW2:
99 crush_destroy_bucket_straw2((struct crush_bucket_straw2 *)b);
105 * crush_destroy - Destroy a crush_map
106 * @map: crush_map pointer
108 void crush_destroy(struct crush_map *map)
113 for (b = 0; b < map->max_buckets; b++) {
114 if (map->buckets[b] == NULL)
116 crush_destroy_bucket(map->buckets[b]);
124 for (b = 0; b < map->max_rules; b++)
125 crush_destroy_rule(map->rules[b]);
130 kfree(map->choose_tries);
132 clear_crush_names(&map->type_names);
133 clear_crush_names(&map->names);
134 clear_choose_args(map);
139 void crush_destroy_rule(struct crush_rule *rule)