Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757939AbaKTXLt (ORCPT ); Thu, 20 Nov 2014 18:11:49 -0500 Received: from na3sys009aog102.obsmtp.com ([74.125.149.69]:35131 "HELO na3sys009aog102.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1756792AbaKTXLr (ORCPT ); Thu, 20 Nov 2014 18:11:47 -0500 From: Joe Stringer To: netdev@vger.kernel.org Cc: shannon.nelson@intel.com, jesse.brandeburg@intel.com, jeffrey.t.kirsher@intel.com, therbert@google.com, linux.nics@intel.com, linux-kernel@vger.kernel.org, jesse@nicira.com Subject: [PATCHv2 net] i40e: Implement ndo_gso_check() Date: Thu, 20 Nov 2014 15:11:21 -0800 Message-Id: <1416525081-27779-1-git-send-email-joestringer@nicira.com> X-Mailer: git-send-email 1.7.10.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 IPIP, GRE, UDP tunnels. Signed-off-by: Joe Stringer --- v2: Expand to include IP in IP and IPv4/IPv6 inside GRE/UDP tunnels. Add MAX_INNER_LENGTH (as 80). --- drivers/net/ethernet/intel/i40e/i40e_main.c | 31 +++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index c3a7f4a..2b01c8d 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -7447,6 +7447,36 @@ static int i40e_ndo_fdb_dump(struct sk_buff *skb, #endif /* USE_DEFAULT_FDB_DEL_DUMP */ #endif /* HAVE_FDB_OPS */ +static bool i40e_gso_check(struct sk_buff *skb, struct net_device *dev) +{ + if ((skb_shinfo(skb)->gso_type & SKB_GSO_IPIP) && + (skb->inner_protocol_type != ENCAP_TYPE_IPPROTO || + skb->inner_protocol != htons(IPPROTO_IPIP))) { + return false; + } + + if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE | SKB_GSO_UDP_TUNNEL)) { + unsigned char *ihdr; + + if (skb->inner_protocol_type != ENCAP_TYPE_ETHER) + return false; + + if (skb->inner_protocol == htons(ETH_P_TEB)) + ihdr = skb_inner_mac_header(skb); + else if (skb->inner_protocol == htons(ETH_P_IP) || + skb->inner_protocol == htons(ETH_P_IPV6)) + ihdr = skb_inner_network_header(skb); + else + return false; + +#define MAX_TUNNEL_HDR_LEN 80 + if (ihdr - skb_transport_header(skb) > MAX_TUNNEL_HDR_LEN) + return false; + } + + return true; +} + static const struct net_device_ops i40e_netdev_ops = { .ndo_open = i40e_open, .ndo_stop = i40e_close, @@ -7487,6 +7517,7 @@ static const struct net_device_ops i40e_netdev_ops = { .ndo_fdb_dump = i40e_ndo_fdb_dump, #endif #endif + .ndo_gso_check = i40e_gso_check, }; /** -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/