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authorPaul Durrant <Paul.Durrant@citrix.com>2013-10-16 20:50:31 +0400
committerDavid S. Miller <davem@davemloft.net>2013-10-17 23:35:17 +0400
commita94685876859be30446357db6d6c4a9c951305b4 (patch)
tree99fe7fd8031b7e137c1474cafdf40e36e0c6c2d8 /include/xen
parent7365bcfa32d2c9d212c41d52ff3509d70b6a3466 (diff)
downloadlinux-a94685876859be30446357db6d6c4a9c951305b4.tar.xz
xen-netback: handle IPv6 TCP GSO packets from the guest
This patch adds a xenstore feature flag, festure-gso-tcpv6, to advertise that netback can handle IPv6 TCP GSO packets. It creates SKB_GSO_TCPV6 skbs if the frontend passes an extra segment with the new type XEN_NETIF_GSO_TYPE_TCPV6 added to netif.h. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Cc: David Vrabel <david.vrabel@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/xen')
-rw-r--r--include/xen/interface/io/netif.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/xen/interface/io/netif.h b/include/xen/interface/io/netif.h
index c9e81849fcd7..5e766ebe77f6 100644
--- a/include/xen/interface/io/netif.h
+++ b/include/xen/interface/io/netif.h
@@ -58,6 +58,13 @@
*/
/*
+ * "feature-gso-tcpv4" and "feature-gso-tcpv6" advertise the capability to
+ * handle large TCP packets (in IPv4 or IPv6 form respectively). Neither
+ * frontends nor backends are assumed to be capable unless the flags are
+ * present.
+ */
+
+/*
* This is the 'wire' format for packets:
* Request 1: xen_netif_tx_request -- XEN_NETTXF_* (any flags)
* [Request 2: xen_netif_extra_info] (only if request 1 has XEN_NETTXF_extra_info)
@@ -102,8 +109,9 @@ struct xen_netif_tx_request {
#define _XEN_NETIF_EXTRA_FLAG_MORE (0)
#define XEN_NETIF_EXTRA_FLAG_MORE (1U<<_XEN_NETIF_EXTRA_FLAG_MORE)
-/* GSO types - only TCPv4 currently supported. */
+/* GSO types */
#define XEN_NETIF_GSO_TYPE_TCPV4 (1)
+#define XEN_NETIF_GSO_TYPE_TCPV6 (2)
/*
* This structure needs to fit within both netif_tx_request and