Function iflib_rxd_pkt_get

freebsd/net/iflib.c:2772–2812

* Process one software descriptor */

 * Process one software descriptor
 */
static struct mbuf *
iflib_rxd_pkt_get(iflib_rxq_t rxq, if_rxd_info_t ri)
{
	struct if_rxsd sd;
	struct mbuf *m;
	int pf_rv;

	/* should I merge this back in now that the two paths are basically duplicated? */
	if (ri->iri_nfrags == 1 &&
	    ri->iri_frags[0].irf_len != 0 &&
	    ri->iri_frags[0].irf_len <= MIN(IFLIB_RX_COPY_THRESH, MHLEN)) {
		m = rxd_frag_to_sd(rxq, &ri->iri_frags[0], false, &sd,
		    &pf_rv, ri);
		if (pf_rv != PFIL_PASS && pf_rv != PFIL_REALLOCED)
			return (m);
		if (pf_rv == PFIL_PASS) {
			m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR);
#ifndef __NO_STRICT_ALIGNMENT
			if (!IP_ALIGNED(m))
				m->m_data += 2;
#endif
			memcpy(m->m_data, *sd.ifsd_cl, ri->iri_len);
			m->m_len = ri->iri_frags[0].irf_len;
		}
	} else {
		m = assemble_segments(rxq, ri, &sd, &pf_rv);
		if (m == NULL)
			return (NULL);
		if (pf_rv != PFIL_PASS && pf_rv != PFIL_REALLOCED)
			return (m);
	}
	m->m_pkthdr.len = ri->iri_len;
	m->m_pkthdr.rcvif = ri->iri_ifp;
	m->m_flags |= ri->iri_flags;
	m->m_pkthdr.ether_vtag = ri->iri_vtag;
	m->m_pkthdr.flowid = ri->iri_flowid;
	M_HASHTYPE_SET(m, ri->iri_rsstype);
	m->m_pkthdr.csum_flags = ri->iri_csum_flags;
	m->m_pkthdr.csum_data = ri->iri_csum_data;
	return (m);
}

#if defined(INET6) || defined(INET)
static void