xen-netback: enable IPv6 TCP GSO to the guest

[cascardo/linux.git] / include / xen / interface / io / netif.h

diff --git a/include/xen/interface/io/netif.h b/include/xen/interface/io/netif.h
index eb262e3..c50061d 100644 (file)
--- a/include/xen/interface/io/netif.h
+++ b/include/xen/interface/io/netif.h
@@ -50,6 +50,20 @@
  * node as before.
  */
 
+/*
+ * "feature-no-csum-offload" should be used to turn IPv4 TCP/UDP checksum
+ * offload off or on. If it is missing then the feature is assumed to be on.
+ * "feature-ipv6-csum-offload" should be used to turn IPv6 TCP/UDP checksum
+ * offload on or off. If it is missing then the feature is assumed to be off.
+ */
+
+/*
+ * "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)
@@ -95,8 +109,10 @@ 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_NONE                (0)
 #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