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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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9
drivers/net/xen-netback/common.h
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@@ -87,9 +87,13 @@ struct pending_tx_info {
struct xenvif_rx_meta {
int id;
int size;
int gso_type;
int gso_size;
};
#define GSO_BIT(type) \
(1 << XEN_NETIF_GSO_TYPE_ ## type)
/* Discriminate from any valid pending_idx value. */
#define INVALID_PENDING_IDX 0xFFFF
@@ -150,9 +154,10 @@ struct xenvif {
u8 fe_dev_addr[6];
/* Frontend feature information. */
int gso_mask;
int gso_prefix_mask;
u8 can_sg:1;
u8 gso:1;
u8 gso_prefix:1;
u8 ip_csum:1;
u8 ipv6_csum:1;