ebitmap_cpy
rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[0].cat);
rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[1].cat);
rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[0].cat);
rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[0].cat);
rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[1].cat);
rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[1].cat);
int ebitmap_cpy(struct ebitmap *dst, const struct ebitmap *src);
rc = ebitmap_cpy(&context->range.level[1].cat,
rc = ebitmap_cpy(&context->range.level[l].cat,
rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);