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Message-Id: <1415138202-1197-5-git-send-email-joestringer@nicira.com>
Date: Tue, 4 Nov 2014 13:56:41 -0800
From: Joe Stringer <joestringer@...ira.com>
To: netdev@...r.kernel.org
Cc: sathya.perla@...lex.com, jeffrey.t.kirsher@...el.com,
linux.nics@...el.com, amirv@...lanox.com, shahed.shaikh@...gic.com,
Dept-GELinuxNICDev@...gic.com, therbert@...gle.com,
linux-kernel@...r.kernel.org
Subject: [PATCH net 4/5] net/mlx4_en: 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 <joestringer@...ira.com>
---
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index f3032fe..aca9908 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -2344,6 +2344,17 @@ static void mlx4_en_del_vxlan_port(struct net_device *dev,
}
#endif
+static bool mlx4_en_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;
+
+ return true;
+}
+
static const struct net_device_ops mlx4_netdev_ops = {
.ndo_open = mlx4_en_open,
.ndo_stop = mlx4_en_close,
@@ -2374,6 +2385,7 @@ static const struct net_device_ops mlx4_netdev_ops = {
.ndo_add_vxlan_port = mlx4_en_add_vxlan_port,
.ndo_del_vxlan_port = mlx4_en_del_vxlan_port,
#endif
+ .ndo_gso_check = mlx4_en_gso_check,
};
static const struct net_device_ops mlx4_netdev_ops_master = {
--
1.7.10.4
--
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