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Differential D29331 Diff 85992 sys/dev/virtio/network/if_vtnet.c

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sys/dev/virtio/network/if_vtnet.c

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sc->vtnet_stats.tx_csum_unknown_ethtype++; sc->vtnet_stats.tx_csum_unknown_ethtype++;
return (EINVAL); return (EINVAL);
} }
return (0); return (0);
} }
static int static int
vtnet_txq_offload_tso(struct vtnet_txq *txq, struct mbuf *m, int flags, vtnet_txq_offload_tso(struct vtnet_txq *txq, struct mbuf *m, int eth_type,
int offset, struct virtio_net_hdr *hdr) int offset, struct virtio_net_hdr *hdr)
{ {
static struct timeval lastecn; static struct timeval lastecn;
static int curecn; static int curecn;
struct vtnet_softc *sc; struct vtnet_softc *sc;
struct tcphdr *tcp, tcphdr; struct tcphdr *tcp, tcphdr;
sc = txq->vtntx_sc; sc = txq->vtntx_sc;
if (__predict_false(m->m_len < offset + sizeof(struct tcphdr))) { if (__predict_false(m->m_len < offset + sizeof(struct tcphdr))) {
m_copydata(m, offset, sizeof(struct tcphdr), (caddr_t) &tcphdr); m_copydata(m, offset, sizeof(struct tcphdr), (caddr_t) &tcphdr);
tcp = &tcphdr; tcp = &tcphdr;
} else } else
tcp = (struct tcphdr *)(m->m_data + offset); tcp = (struct tcphdr *)(m->m_data + offset);
hdr->hdr_len = vtnet_gtoh16(sc, offset + (tcp->th_off << 2)); hdr->hdr_len = vtnet_gtoh16(sc, offset + (tcp->th_off << 2));
hdr->gso_size = vtnet_gtoh16(sc, m->m_pkthdr.tso_segsz); hdr->gso_size = vtnet_gtoh16(sc, m->m_pkthdr.tso_segsz);
hdr->gso_type = (flags & CSUM_IP_TSO) ? hdr->gso_type = eth_type == ETHERTYPE_IP ? VIRTIO_NET_HDR_GSO_TCPV4 :
VIRTIO_NET_HDR_GSO_TCPV4 : VIRTIO_NET_HDR_GSO_TCPV6; VIRTIO_NET_HDR_GSO_TCPV6;
if (__predict_false(tcp->th_flags & TH_CWR)) { if (__predict_false(tcp->th_flags & TH_CWR)) {
/* /*
* Drop if VIRTIO_NET_F_HOST_ECN was not negotiated. In * Drop if VIRTIO_NET_F_HOST_ECN was not negotiated. In
* FreeBSD, ECN support is not on a per-interface basis, * FreeBSD, ECN support is not on a per-interface basis,
* but globally via the net.inet.tcp.ecn.enable sysctl * but globally via the net.inet.tcp.ecn.enable sysctl
* knob. The default is off. * knob. The default is off.
*/ */
▲ Show 20 Lines • Show All 49 Lines • ▼ Show 20 Lines if (__predict_false(proto != IPPROTO_TCP)) {
sc->vtnet_stats.tx_tso_not_tcp++; sc->vtnet_stats.tx_tso_not_tcp++;
goto drop; goto drop;
} else if (__predict_false((hdr->flags & } else if (__predict_false((hdr->flags &
VIRTIO_NET_HDR_F_NEEDS_CSUM) == 0)) { VIRTIO_NET_HDR_F_NEEDS_CSUM) == 0)) {
sc->vtnet_stats.tx_tso_without_csum++; sc->vtnet_stats.tx_tso_without_csum++;
goto drop; goto drop;
} }
error = vtnet_txq_offload_tso(txq, m, flags, csum_start, hdr); error = vtnet_txq_offload_tso(txq, m, etype, csum_start, hdr);
if (error) if (error)
goto drop; goto drop;
} }
return (m); return (m);
drop: drop:
m_freem(m); m_freem(m);
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