sf_bfree
u_int32_t sf_bfree;
sfp->sf_bfree = txdr_unsigned(sf->f_bfree);
sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
u_int32_t sf_bfree;
(u_int32_t)ntohl(sfsp->sf_bfree),