svn commit: r275275 - stable/9/sys/dev/virtio/network

[Bryan Venteicher]

Author: bryanv
Date: Sat Nov 29 23:10:19 2014
New Revision: 275275
URL: https://svnweb.freebsd.org/changeset/base/275275

Log:
  MFC r274325:
  
    Enable LRO by default when available on vtnet interfaces
  
    The prior change to not enable LRO by default has confused several
    people. The configurations where LRO is problematic is not the
    typical use case for VirtIO, and due to other issues, this often
    requires checksum offloading to be disabled anyways.

Modified:
  stable/9/sys/dev/virtio/network/if_vtnet.c
Directory Properties:
  stable/9/   (props changed)
  stable/9/sys/   (props changed)
  stable/9/sys/dev/   (props changed)

Modified: stable/9/sys/dev/virtio/network/if_vtnet.c
==============================================================================
--- stable/9/sys/dev/virtio/network/if_vtnet.c	Sat Nov 29 23:05:01 2014	(r275274)
+++ stable/9/sys/dev/virtio/network/if_vtnet.c	Sat Nov 29 23:10:19 2014	(r275275)
@@ -966,9 +966,14 @@ vtnet_setup_interface(struct vtnet_softc
 			ifp->if_capabilities |= IFCAP_VLAN_HWTSO;
 	}
 
-	if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_CSUM))
+	if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_CSUM)) {
 		ifp->if_capabilities |= IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6;
 
+		if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO4) ||
+		    virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO6))
+			ifp->if_capabilities |= IFCAP_LRO;
+	}
+
 	if (ifp->if_capabilities & IFCAP_HWCSUM) {
 		/*
 		 * VirtIO does not support VLAN tagging, but we can fake
@@ -986,12 +991,6 @@ vtnet_setup_interface(struct vtnet_softc
 	 * Capabilities after here are not enabled by default.
 	 */
 
-	if (ifp->if_capabilities & IFCAP_RXCSUM) {
-		if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO4) ||
-		    virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO6))
-			ifp->if_capabilities |= IFCAP_LRO;
-	}
-
 	if (sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER) {
 		ifp->if_capabilities |= IFCAP_VLAN_HWFILTER;