3 # include <linux/slab.h>
7 # define kfree(x) do { if (x) free(x); } while (0)
8 # define BUG_ON(x) assert(!(x))
11 #include <linux/crush/crush.h>
13 const char *crush_bucket_alg_name(int alg)
16 case CRUSH_BUCKET_UNIFORM: return "uniform";
17 case CRUSH_BUCKET_LIST: return "list";
18 case CRUSH_BUCKET_TREE: return "tree";
19 case CRUSH_BUCKET_STRAW: return "straw";
20 default: return "unknown";
25 * crush_get_bucket_item_weight - Get weight of an item in given bucket
27 * @p: item index in bucket
29 int crush_get_bucket_item_weight(const struct crush_bucket *b, int p)
31 if ((__u32)p >= b->size)
35 case CRUSH_BUCKET_UNIFORM:
36 return ((struct crush_bucket_uniform *)b)->item_weight;
37 case CRUSH_BUCKET_LIST:
38 return ((struct crush_bucket_list *)b)->item_weights[p];
39 case CRUSH_BUCKET_TREE:
40 return ((struct crush_bucket_tree *)b)->node_weights[crush_calc_tree_node(p)];
41 case CRUSH_BUCKET_STRAW:
42 return ((struct crush_bucket_straw *)b)->item_weights[p];
47 void crush_destroy_bucket_uniform(struct crush_bucket_uniform *b)
54 void crush_destroy_bucket_list(struct crush_bucket_list *b)
56 kfree(b->item_weights);
57 kfree(b->sum_weights);
63 void crush_destroy_bucket_tree(struct crush_bucket_tree *b)
67 kfree(b->node_weights);
71 void crush_destroy_bucket_straw(struct crush_bucket_straw *b)
74 kfree(b->item_weights);
80 void crush_destroy_bucket(struct crush_bucket *b)
83 case CRUSH_BUCKET_UNIFORM:
84 crush_destroy_bucket_uniform((struct crush_bucket_uniform *)b);
86 case CRUSH_BUCKET_LIST:
87 crush_destroy_bucket_list((struct crush_bucket_list *)b);
89 case CRUSH_BUCKET_TREE:
90 crush_destroy_bucket_tree((struct crush_bucket_tree *)b);
92 case CRUSH_BUCKET_STRAW:
93 crush_destroy_bucket_straw((struct crush_bucket_straw *)b);
99 * crush_destroy - Destroy a crush_map
100 * @map: crush_map pointer
102 void crush_destroy(struct crush_map *map)
107 for (b = 0; b < map->max_buckets; b++) {
108 if (map->buckets[b] == NULL)
110 crush_destroy_bucket(map->buckets[b]);
118 for (b = 0; b < map->max_rules; b++)
119 crush_destroy_rule(map->rules[b]);
126 void crush_destroy_rule(struct crush_rule *rule)