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vhost: support UDP Fragmentation Offload

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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>
This commit is contained in:
Jiayu Hu 2017-11-21 14:56:52 +08:00 committed by Ferruh Yigit
parent a3fdb53270
commit 6d18505efa
3 changed files with 19 additions and 0 deletions
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7
lib/librte_mbuf/rte_mbuf.h
View File

@ -208,6 +208,13 @@ extern "C" {
/* 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.
*/

2
lib/librte_vhost/vhost.h
View File

@ -178,10 +178,12 @@ struct vhost_msg {
(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_GUEST_UFO) | \
(1ULL << VIRTIO_RING_F_INDIRECT_DESC) | \
(1ULL << VIRTIO_NET_F_MTU) | \
(1ULL << VIRTIO_F_IOMMU_PLATFORM))

10
lib/librte_vhost/virtio_net.c
View File

@ -159,6 +159,11 @@ virtio_enqueue_offload(struct rte_mbuf *m_buf, struct virtio_net_hdr *net_hdr)
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);
@ -792,6 +797,11 @@ vhost_dequeue_offload(struct virtio_net_hdr *hdr, struct rte_mbuf *m)
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);