[Intel-wired-lan] [PATCH net v2] i40e: Implement ndo_features_check()
Jesse Gross
jesse at nicira.com
Wed Apr 15 00:09:14 UTC 2015
From: Joe Stringer <joestringer at nicira.com>
i40e supports UDP tunnel headers up to 80 bytes in length, so
this adds a check to ensure that it doesn't try to offload
packets that exceed that.
Signed-off-by: Joe Stringer <joestringer at nicira.com>
Signed-off-by: Jesse Gross <jesse at nicira.com>
---
v2: Move #define above function comment.
---
drivers/net/ethernet/intel/i40e/i40e_main.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index dadda3c..eeff157 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -7653,6 +7653,25 @@ static int i40e_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
return err;
}
+#define I40E_MAX_TUNNEL_HDR_LEN 80
+/**
+ * i40e_features_check - Validate encapsulated packet conforms to limits
+ * @skb: skb buff
+ * @netdev: This physical port's netdev
+ * @features: Offload features that the stack believes apply
+ **/
+static netdev_features_t i40e_features_check(struct sk_buff *skb,
+ struct net_device *dev,
+ netdev_features_t features)
+{
+ if (skb->encapsulation &&
+ (skb_inner_mac_header(skb) - skb_transport_header(skb) >
+ I40E_MAX_TUNNEL_HDR_LEN))
+ return features & ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);
+
+ return features;
+}
+
static const struct net_device_ops i40e_netdev_ops = {
.ndo_open = i40e_open,
.ndo_stop = i40e_close,
@@ -7687,6 +7706,7 @@ static const struct net_device_ops i40e_netdev_ops = {
#endif
.ndo_get_phys_port_id = i40e_get_phys_port_id,
.ndo_fdb_add = i40e_ndo_fdb_add,
+ .ndo_features_check = i40e_features_check,
};
/**
--
1.9.1
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