[PATCH 3/4] virtio-net: added USO support

[Yuri Benditovich <yuri.benditovich@daynix.com>]

virtio-net can suggest USO features TX, RX v4 and RX v6,
depending on kernel TUN ability to support them. These
features require explicit enable in command-line.

Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
---
 hw/net/virtio-net.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index d2311e7d6e..e76cad923b 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -796,6 +796,10 @@ static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features,
         virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_TSO6);
         virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_ECN);
 
+        virtio_clear_feature(&features, VIRTIO_NET_F_HOST_USO);
+        virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_USO4);
+        virtio_clear_feature(&features, VIRTIO_NET_F_GUEST_USO6);
+
         virtio_clear_feature(&features, VIRTIO_NET_F_HASH_REPORT);
     }
 
@@ -864,14 +868,16 @@ static void virtio_net_apply_guest_offloads(VirtIONet *n)
             !!(n->curr_guest_offloads & (1ULL << VIRTIO_NET_F_GUEST_USO6)));
 }
 
-static uint64_t virtio_net_guest_offloads_by_features(uint32_t features)
+static uint64_t virtio_net_guest_offloads_by_features(uint64_t features)
 {
     static const uint64_t guest_offloads_mask =
         (1ULL << VIRTIO_NET_F_GUEST_CSUM) |
         (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
         (1ULL << VIRTIO_NET_F_GUEST_TSO6) |
         (1ULL << VIRTIO_NET_F_GUEST_ECN)  |
-        (1ULL << VIRTIO_NET_F_GUEST_UFO);
+        (1ULL << VIRTIO_NET_F_GUEST_UFO)  |
+        (1ULL << VIRTIO_NET_F_GUEST_USO4) |
+        (1ULL << VIRTIO_NET_F_GUEST_USO6);
 
     return guest_offloads_mask & features;
 }
@@ -3924,6 +3930,12 @@ static Property virtio_net_properties[] = {
     DEFINE_PROP_INT32("speed", VirtIONet, net_conf.speed, SPEED_UNKNOWN),
     DEFINE_PROP_STRING("duplex", VirtIONet, net_conf.duplex_str),
     DEFINE_PROP_BOOL("failover", VirtIONet, failover, false),
+    DEFINE_PROP_BIT64("guest_uso4", VirtIONet, host_features,
+                      VIRTIO_NET_F_GUEST_USO4, false),
+    DEFINE_PROP_BIT64("guest_uso6", VirtIONet, host_features,
+                      VIRTIO_NET_F_GUEST_USO6, false),
+    DEFINE_PROP_BIT64("host_uso", VirtIONet, host_features,
+                      VIRTIO_NET_F_HOST_USO, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
2.34.3