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i40e: Implement ndo_features_check()

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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@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Joe Stringer 2015-04-14 17:09:14 -07:00 committed by Jeff Kirsher
parent aad0d51e93
commit f44a75e27d
1 changed files with 20 additions and 0 deletions
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20
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -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,