RE: [PATCH net 5/5] qlcnic: Implement ndo_gso_check()

-----Original Message-----
From: Joe Stringer [mailto:joestringer@nicira.com]
Sent: Wednesday, November 05, 2014 3:27 AM
To: netdev
Cc: sathya.perla@emulex.com; jeffrey.t.kirsher@intel.com;
linux.nics@intel.com; amirv@mellanox.com; Shahed Shaikh; Dept-GE Linux
NIC Dev; Tom Herbert (Partner - google); linux-kernel
Subject: [PATCH net 5/5] qlcnic: Implement ndo_gso_check()

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 something that looks like VXLAN.

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

Signed-off-by: Joe Stringer <redacted>
---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
index f5e29f7..6184f47 100644

--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

@@ -505,6 +505,17 @@ static void qlcnic_del_vxlan_port(struct net_device

*netdev,  }  #endif

+static bool qlcnic_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) != 16))
+		return false;
+