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authorPravin B Shelar <pshelar@nicira.com>2013-02-14 18:02:41 +0400
committerDavid S. Miller <davem@davemloft.net>2013-02-16 00:17:11 +0400
commit68c331631143f5f039baac99a650e0b9e1ea02b6 (patch)
treec69d73c5599aab5e92a8c99bc5343c9fc9ffbbd8 /include/linux/netdev_features.h
parent05e8ef4ab2d8087d360e814d14da20b9f7fb2283 (diff)
downloadlinux-68c331631143f5f039baac99a650e0b9e1ea02b6.tar.xz
v4 GRE: Add TCP segmentation offload for GRE
Following patch adds GRE protocol offload handler so that skb_gso_segment() can segment GRE packets. SKB GSO CB is added to keep track of total header length so that skb_segment can push entire header. e.g. in case of GRE, skb_segment need to push inner and outer headers to every segment. New NETIF_F_GRE_GSO feature is added for devices which support HW GRE TSO offload. Currently none of devices support it therefore GRE GSO always fall backs to software GSO. [ Compute pkt_len before ip_local_out() invocation. -DaveM ] Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdev_features.h')
-rw-r--r--include/linux/netdev_features.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 5ac32123035a..3dd39340430e 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -41,7 +41,7 @@ enum {
NETIF_F_TSO_ECN_BIT, /* ... TCP ECN support */
NETIF_F_TSO6_BIT, /* ... TCPv6 segmentation */
NETIF_F_FSO_BIT, /* ... FCoE segmentation */
- NETIF_F_GSO_RESERVED1, /* ... free (fill GSO_MASK to 8 bits) */
+ NETIF_F_GSO_GRE_BIT, /* ... GRE with TSO */
/**/NETIF_F_GSO_LAST, /* [can't be last bit, see GSO_MASK] */
NETIF_F_GSO_RESERVED2 /* ... free (fill GSO_MASK to 8 bits) */
= NETIF_F_GSO_LAST,
@@ -102,6 +102,7 @@ enum {
#define NETIF_F_VLAN_CHALLENGED __NETIF_F(VLAN_CHALLENGED)
#define NETIF_F_RXFCS __NETIF_F(RXFCS)
#define NETIF_F_RXALL __NETIF_F(RXALL)
+#define NETIF_F_GRE_GSO __NETIF_F(GSO_GRE)
/* Features valid for ethtool to change */
/* = all defined minus driver/device-class-related */