From: Wei Xu <w...@redhat.com>
Field 'coalesced' is to indicate how many packets are coalesced and field
'dup_ack' is how many duplicate acks are merged, guest driver can use these
information to notify what's the exact scene of original traffic over the
networks.
Signed-off-by: Wei Xu <w...@redhat.com>
---
hw/net/virtio-net.c | 8 ++++++++
include/standard-headers/linux/virtio_net.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index cc8cbe4..20f552a 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1768,6 +1768,10 @@ static size_t virtio_net_rsc_drain_seg(NetRscChain
*chain, NetRscSeg *seg)
if ((chain->proto == ETH_P_IP) && seg->is_coalesced) {
virtio_net_rsc_ipv4_checksum(h, seg->unit.ip);
}
+ h->coalesced = seg->packets;
+ h->dup_ack = seg->dup_ack;
+ h->gso_type = chain->gso_type;
+ h->gso_size = chain->max_payload;
ret = virtio_net_do_receive(seg->nc, seg->buf, seg->size);
QTAILQ_REMOVE(&chain->buffers, seg, next);
g_free(seg->buf);
@@ -2302,9 +2306,13 @@ static ssize_t virtio_net_receive(NetClientState *nc,
const uint8_t *buf, size_t size)
{
VirtIONet *n;
+ struct virtio_net_hdr *h;
n = qemu_get_nic_opaque(nc);
if (n->host_features & (1ULL << VIRTIO_NET_F_GUEST_RSC)) {
+ h = (struct virtio_net_hdr *)buf;
+ h->coalesced = 0;
+ h->dup_ack = 0;
return virtio_net_rsc_receive(nc, buf, size);
} else {
return virtio_net_do_receive(nc, buf, size);
diff --git a/include/standard-headers/linux/virtio_net.h
b/include/standard-headers/linux/virtio_net.h
index 5b95762..c837417 100644
--- a/include/standard-headers/linux/virtio_net.h
+++ b/include/standard-headers/linux/virtio_net.h
@@ -114,6 +114,8 @@ struct virtio_net_hdr {
__virtio16 gso_size; /* Bytes to append to hdr_len per frame
*/
__virtio16 csum_start; /* Position to start checksumming from */
__virtio16 csum_offset; /* Offset after that to place checksum */
+ __virtio16 coalesced; /* packets coalesced by host */
+ __virtio16 dup_ack; /* duplicate ack count */
};
/* This is the version of the header to use when the MRG_RXBUF
--
2.7.1
