2 # include <linux/slab.h>
3 # include <linux/crush/crush.h>
5 # include "crush_compat.h"
9 const char *crush_bucket_alg_name(int alg)
12 case CRUSH_BUCKET_UNIFORM: return "uniform";
13 case CRUSH_BUCKET_LIST: return "list";
14 case CRUSH_BUCKET_TREE: return "tree";
15 case CRUSH_BUCKET_STRAW: return "straw";
16 case CRUSH_BUCKET_STRAW2: return "straw2";
17 default: return "unknown";
22 * crush_get_bucket_item_weight - Get weight of an item in given bucket
24 * @p: item index in bucket
26 int crush_get_bucket_item_weight(const struct crush_bucket *b, int p)
28 if ((__u32)p >= b->size)
32 case CRUSH_BUCKET_UNIFORM:
33 return ((struct crush_bucket_uniform *)b)->item_weight;
34 case CRUSH_BUCKET_LIST:
35 return ((struct crush_bucket_list *)b)->item_weights[p];
36 case CRUSH_BUCKET_TREE:
37 return ((struct crush_bucket_tree *)b)->node_weights[crush_calc_tree_node(p)];
38 case CRUSH_BUCKET_STRAW:
39 return ((struct crush_bucket_straw *)b)->item_weights[p];
40 case CRUSH_BUCKET_STRAW2:
41 return ((struct crush_bucket_straw2 *)b)->item_weights[p];
46 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);
62 void crush_destroy_bucket_tree(struct crush_bucket_tree *b)
66 kfree(b->node_weights);
70 void crush_destroy_bucket_straw(struct crush_bucket_straw *b)
73 kfree(b->item_weights);
79 void crush_destroy_bucket_straw2(struct crush_bucket_straw2 *b)
81 kfree(b->item_weights);
87 void crush_destroy_bucket(struct crush_bucket *b)
90 case CRUSH_BUCKET_UNIFORM:
91 crush_destroy_bucket_uniform((struct crush_bucket_uniform *)b);
93 case CRUSH_BUCKET_LIST:
94 crush_destroy_bucket_list((struct crush_bucket_list *)b);
96 case CRUSH_BUCKET_TREE:
97 crush_destroy_bucket_tree((struct crush_bucket_tree *)b);
99 case CRUSH_BUCKET_STRAW:
100 crush_destroy_bucket_straw((struct crush_bucket_straw *)b);
102 case CRUSH_BUCKET_STRAW2:
103 crush_destroy_bucket_straw2((struct crush_bucket_straw2 *)b);
109 * crush_destroy - Destroy a crush_map
110 * @map: crush_map pointer
112 void crush_destroy(struct crush_map *map)
117 for (b = 0; b < map->max_buckets; b++) {
118 if (map->buckets[b] == NULL)
120 crush_destroy_bucket(map->buckets[b]);
128 for (b = 0; b < map->max_rules; b++)
129 crush_destroy_rule(map->rules[b]);
134 kfree(map->choose_tries);
139 void crush_destroy_rule(struct crush_rule *rule)