Patch "virtio-net: enable TSO/checksum offloads for Q-in-Q vlans" has been added to the 4.4-stable tree

Patch "virtio-net: enable TSO/checksum offloads for Q-in-Q vlans" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    virtio-net: enable TSO/checksum offloads for Q-in-Q vlans

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     virtio-net-enable-tso-checksum-offloads-for-q-in-q-vlans.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Fri Jun  2 09:29:55 JST 2017
From: Vlad Yasevich <vyasevich@gmail.com>
Date: Tue, 23 May 2017 13:38:43 -0400
Subject: virtio-net: enable TSO/checksum offloads for Q-in-Q vlans

From: Vlad Yasevich <vyasevich@gmail.com>


[ Upstream commit 2836b4f224d4fd7d1a2b23c3eecaf0f0ae199a74 ]

Since virtio does not provide it's own ndo_features_check handler,
TSO, and now checksum offload, are disabled for stacked vlans.
Re-enable the support and let the host take care of it.  This
restores/improves Guest-to-Guest performance over Q-in-Q vlans.

Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/virtio_net.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1415,6 +1415,7 @@ static const struct net_device_ops virtn
 #ifdef CONFIG_NET_RX_BUSY_POLL
 	.ndo_busy_poll		= virtnet_busy_poll,
 #endif
+	.ndo_features_check	= passthru_features_check,
 };
 
 static void virtnet_config_changed_work(struct work_struct *work)


Patches currently in stable-queue which might be from vyasevich@gmail.com are

queue-4.4/sctp-fix-icmp-processing-if-skb-is-non-linear.patch
queue-4.4/virtio-net-enable-tso-checksum-offloads-for-q-in-q-vlans.patch
queue-4.4/vlan-fix-tcp-checksum-offloads-in-q-in-q-vlans.patch
queue-4.4/be2net-fix-offload-features-for-q-in-q-packets.patch