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xen-netback: add support for IPv6 checksum offload to guest

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Check xenstore flag feature-ipv6-csum-offload to determine if a
guest is happy to accept IPv6 packets with only partial checksum.

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 17:50:28 +01:00
committed by David S. Miller
parent c0f4ace79e
commit 146c8a77d2
4 changed files with 22 additions and 5 deletions
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7
include/xen/interface/io/netif.h
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@@ -50,6 +50,13 @@
* 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.
*/
/*
* This is the 'wire' format for packets:
* Request 1: xen_netif_tx_request -- XEN_NETTXF_* (any flags)