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xen-netback: enable IPv6 TCP GSO to the guest

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This patch adds code to handle SKB_GSO_TCPV6 skbs and construct appropriate
extra or prefix segments to pass the large packet to the frontend. New
xenstore flags, feature-gso-tcpv6 and feature-gso-tcpv6-prefix, are sampled
to determine if the frontend is capable of handling such packets.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Durrant
2013-10-16 17:50:32 +01:00
committed by David S. Miller
parent a946858768
commit 82cada22a0
5 changed files with 77 additions and 16 deletions
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include/xen/interface/io/netif.h
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@@ -110,6 +110,7 @@ struct xen_netif_tx_request {
#define XEN_NETIF_EXTRA_FLAG_MORE (1U<<_XEN_NETIF_EXTRA_FLAG_MORE)
/* GSO types */
#define XEN_NETIF_GSO_TYPE_NONE (0)
#define XEN_NETIF_GSO_TYPE_TCPV4 (1)
#define XEN_NETIF_GSO_TYPE_TCPV6 (2)