vhost: log virtio and vhost-user negotiated features

Having this info logged by default when analysing bug reports
has proved to be useful.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index c9e29ec..0b72648 100644 (file)
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -284,6 +284,8 @@ vhost_user_set_features(struct virtio_net **pdev, struct VhostUserMsg *msg,
        } else {
                dev->vhost_hlen = sizeof(struct virtio_net_hdr);
        }
+       RTE_LOG(INFO, VHOST_CONFIG,
+               "negotiated Virtio features: 0x%" PRIx64 "\n", dev->features);
        VHOST_LOG_DEBUG(VHOST_CONFIG,
                "(%d) mergeable RX buffers %s, virtio 1 %s\n",
                dev->vid,
@@ -1406,6 +1408,9 @@ vhost_user_set_protocol_features(struct virtio_net **pdev,
        }
 
        dev->protocol_features = protocol_features;
+       RTE_LOG(INFO, VHOST_CONFIG,
+               "negotiated Vhost-user protocol features: 0x%" PRIx64 "\n",
+               dev->protocol_features);
 
        return RTE_VHOST_MSG_RESULT_OK;
 }