In virtio, UDP Fragmentation Offload (UFO) includes two parts: host UFO
and guest UFO. Guest UFO means the frontend can receive large UDP
packets, and host UFO means the backend can receive large UDP packets.
This patch supports host UFO and guest UFO for vhost-user.
Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Tested-by: Lei Yao <lei.a.yao@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Yuanhan Liu <yliu@fridaylinux.org>
/* add new TX flags here */
/* add new TX flags here */
+/**
+ * UDP Fragmentation Offload flag. This flag is used for enabling UDP
+ * fragmentation in SW or in HW. When use UFO, mbuf->tso_segsz is used
+ * to store the MSS of UDP fragments.
+ */
+#define PKT_TX_UDP_SEG (1ULL << 42)
+
/**
* Request security offload processing on the TX packet.
*/
/**
* Request security offload processing on the TX packet.
*/
(1ULL << VIRTIO_NET_F_GSO) | \
(1ULL << VIRTIO_NET_F_HOST_TSO4) | \
(1ULL << VIRTIO_NET_F_HOST_TSO6) | \
(1ULL << VIRTIO_NET_F_GSO) | \
(1ULL << VIRTIO_NET_F_HOST_TSO4) | \
(1ULL << VIRTIO_NET_F_HOST_TSO6) | \
+ (1ULL << VIRTIO_NET_F_HOST_UFO) | \
(1ULL << VIRTIO_NET_F_CSUM) | \
(1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
(1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
(1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
(1ULL << VIRTIO_NET_F_CSUM) | \
(1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
(1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
(1ULL << VIRTIO_NET_F_GUEST_TSO6) | \
+ (1ULL << VIRTIO_NET_F_GUEST_UFO) | \
(1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
(1ULL << VIRTIO_NET_F_MTU) | \
(1ULL << VIRTIO_F_IOMMU_PLATFORM))
(1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
(1ULL << VIRTIO_NET_F_MTU) | \
(1ULL << VIRTIO_F_IOMMU_PLATFORM))
net_hdr->gso_size = m_buf->tso_segsz;
net_hdr->hdr_len = m_buf->l2_len + m_buf->l3_len
+ m_buf->l4_len;
net_hdr->gso_size = m_buf->tso_segsz;
net_hdr->hdr_len = m_buf->l2_len + m_buf->l3_len
+ m_buf->l4_len;
+ } else if (m_buf->ol_flags & PKT_TX_UDP_SEG) {
+ net_hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP;
+ net_hdr->gso_size = m_buf->tso_segsz;
+ net_hdr->hdr_len = m_buf->l2_len + m_buf->l3_len +
+ m_buf->l4_len;
} else {
ASSIGN_UNLESS_EQUAL(net_hdr->gso_type, 0);
ASSIGN_UNLESS_EQUAL(net_hdr->gso_size, 0);
} else {
ASSIGN_UNLESS_EQUAL(net_hdr->gso_type, 0);
ASSIGN_UNLESS_EQUAL(net_hdr->gso_size, 0);
m->tso_segsz = hdr->gso_size;
m->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
break;
m->tso_segsz = hdr->gso_size;
m->l4_len = (tcp_hdr->data_off & 0xf0) >> 2;
break;
+ case VIRTIO_NET_HDR_GSO_UDP:
+ m->ol_flags |= PKT_TX_UDP_SEG;
+ m->tso_segsz = hdr->gso_size;
+ m->l4_len = sizeof(struct udp_hdr);
+ break;
default:
RTE_LOG(WARNING, VHOST_DATA,
"unsupported gso type %u.\n", hdr->gso_type);
default:
RTE_LOG(WARNING, VHOST_DATA,
"unsupported gso type %u.\n", hdr->gso_type);