GET_SF_RESV_SIZE
head = get_starting_head(shead, HDR_SZ * 2, GET_SF_RESV_SIZE(sf), NULL);
resv_sz = GET_SF_RESV_SIZE(sf);
head = get_starting_head(shead, HDR_SZ, GET_SF_RESV_SIZE(sf), NULL);
GET_SF_RESV_SIZE(sf), NULL);
resv_sz = GET_SF_RESV_SIZE(sf);
resv_sz = GET_SF_RESV_SIZE(sf);
resv_sz = GET_SF_RESV_SIZE(sf);
resv_sz = GET_SF_RESV_SIZE(sf);
resv_sz = GET_SF_RESV_SIZE(sf);