vnidpool
status_t vnidpool_alloc(struct vnidpool **pool, size_t size)
struct vnidpool *p;
p = malloc(sizeof(struct vnidpool) + size / sizeof(BMT));
status_t vnidpool_free(struct vnidpool *pool) {
status_t vnidpool_get(struct vnidpool *pool, ino_t *vnid)
status_t vnidpool_put(struct vnidpool *pool, ino_t vnid)
status_t vnidpool_alloc(struct vnidpool **pool, size_t size);
status_t vnidpool_free(struct vnidpool *pool);
status_t vnidpool_get(struct vnidpool *pool, ino_t *vnid);
status_t vnidpool_put(struct vnidpool *pool, ino_t vnid);
struct vnidpool;
struct vnidpool *vnids;