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Subject[PATCH net 2/5] i40e: Implement ndo_gso_check()
Date
ndo_gso_check() was recently introduced to allow NICs to report the
offloading support that they have on a per-skb basis. Add an
implementation for this driver which checks for tunnel headers over UDP
of up to 64 octets in length.

Implementation shamelessly stolen from Tom Herbert:
http://thread.gmane.org/gmane.linux.network/332428/focus=333111

Signed-off-by: Joe Stringer <joestringer@nicira.com>
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index c3a7f4a..21829b5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -7444,9 +7444,20 @@ static int i40e_ndo_fdb_dump(struct sk_buff *skb,

return idx;
}
-
#endif /* USE_DEFAULT_FDB_DEL_DUMP */
#endif /* HAVE_FDB_OPS */
+
+static bool i40e_gso_check(struct sk_buff *skb, struct net_device *dev)
+{
+ if ((skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL) &&
+ (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
+ skb->inner_protocol != htons(ETH_P_TEB) ||
+ skb_inner_mac_header(skb) - skb_transport_header(skb) > 64))
+ return false;
+
+ return true;
+}
+
static const struct net_device_ops i40e_netdev_ops = {
.ndo_open = i40e_open,
.ndo_stop = i40e_close,
@@ -7487,6 +7498,7 @@ static const struct net_device_ops i40e_netdev_ops = {
.ndo_fdb_dump = i40e_ndo_fdb_dump,
#endif
#endif
+ .ndo_gso_check = i40e_gso_check,
};

/**
--
1.7.10.4


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