hammer2_chain_scan
int hammer2_chain_scan(hammer2_chain_t *parent,
error |= hammer2_chain_scan(parent, &chain, &bref, &first,
error |= hammer2_chain_scan(parent, &chain, &bref,
int hammer2_chain_scan(hammer2_chain_t *parent,
error |= hammer2_chain_scan(parent, &chain, &bref, &first,
error |= hammer2_chain_scan(parent, &chain, &bref,