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 case CRUSH_BUCKET_STRAW2: return "straw2";
21 default: return "unknown";
26 * crush_get_bucket_item_weight - Get weight of an item in given bucket
28 * @p: item index in bucket
30 int crush_get_bucket_item_weight(const struct crush_bucket *b, int p)
32 if ((__u32)p >= b->size)
36 case CRUSH_BUCKET_UNIFORM:
37 return ((struct crush_bucket_uniform *)b)->item_weight;
38 case CRUSH_BUCKET_LIST:
39 return ((struct crush_bucket_list *)b)->item_weights[p];
40 case CRUSH_BUCKET_TREE:
41 return ((struct crush_bucket_tree *)b)->node_weights[crush_calc_tree_node(p)];
42 case CRUSH_BUCKET_STRAW:
43 return ((struct crush_bucket_straw *)b)->item_weights[p];
44 case CRUSH_BUCKET_STRAW2:
45 return ((struct crush_bucket_straw2 *)b)->item_weights[p];
50 void crush_destroy_bucket_uniform(struct crush_bucket_uniform *b)
57 void crush_destroy_bucket_list(struct crush_bucket_list *b)
59 kfree(b->item_weights);
60 kfree(b->sum_weights);
66 void crush_destroy_bucket_tree(struct crush_bucket_tree *b)
70 kfree(b->node_weights);
74 void crush_destroy_bucket_straw(struct crush_bucket_straw *b)
77 kfree(b->item_weights);
83 void crush_destroy_bucket_straw2(struct crush_bucket_straw2 *b)
85 kfree(b->item_weights);
91 void crush_destroy_bucket(struct crush_bucket *b)
94 case CRUSH_BUCKET_UNIFORM:
95 crush_destroy_bucket_uniform((struct crush_bucket_uniform *)b);
97 case CRUSH_BUCKET_LIST:
98 crush_destroy_bucket_list((struct crush_bucket_list *)b);
100 case CRUSH_BUCKET_TREE:
101 crush_destroy_bucket_tree((struct crush_bucket_tree *)b);
103 case CRUSH_BUCKET_STRAW:
104 crush_destroy_bucket_straw((struct crush_bucket_straw *)b);
106 case CRUSH_BUCKET_STRAW2:
107 crush_destroy_bucket_straw2((struct crush_bucket_straw2 *)b);
113 * crush_destroy - Destroy a crush_map
114 * @map: crush_map pointer
116 void crush_destroy(struct crush_map *map)
121 for (b = 0; b < map->max_buckets; b++) {
122 if (map->buckets[b] == NULL)
124 crush_destroy_bucket(map->buckets[b]);
132 for (b = 0; b < map->max_rules; b++)
133 crush_destroy_rule(map->rules[b]);
140 void crush_destroy_rule(struct crush_rule *rule)