delta_stats_t
delta_stats_t ds;
bool, blockref_stats_t *, struct blockref_tree *, delta_stats_t *, int, int);
delta_stats_t ds;
delta_stats_t ds;
load_delta_stats(blockref_stats_t *bstats, const delta_stats_t *dstats)
accumulate_delta_stats(delta_stats_t *dst, const delta_stats_t *src)
delta_stats_t *dstats, int depth, int index)
delta_stats_t *ds = m->msg;