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Commit f44a75e2 authored by Joe Stringer's avatar Joe Stringer Committed by Jeff Kirsher
Browse files

i40e: Implement ndo_features_check() 



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: default avatarJoe Stringer <joestringer@nicira.com>
Signed-off-by: default avatarJesse Gross <jesse@nicira.com>
Acked-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent aad0d51e

drivers/net/ethernet/intel/i40e/i40e_main.c

+20 −0
Original line number Diff line number Diff line
@@ -8099,6 +8099,25 @@ static int i40e_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 
}

#endif /* HAVE_BRIDGE_ATTRIBS */



#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,
@@ -8133,6 +8152,7 @@ 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,

#ifdef HAVE_BRIDGE_ATTRIBS

	.ndo_bridge_getlink	= i40e_ndo_bridge_getlink,

	.ndo_bridge_setlink	= i40e_ndo_bridge_setlink,