PFKEY_STAT_IN_BYTES
_NET_STATADD_REF(ps, PFKEY_STAT_IN_BYTES, len);
_NET_STATADD_REF(ps, PFKEY_STAT_IN_BYTES, len);
_NET_STATADD_REF(ps, PFKEY_STAT_IN_BYTES, m->m_pkthdr.len);
p(PFKEY_STAT_IN_BYTES, "\t%llu byte%s sent to userland\n");