From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751869AbaLESl3 (ORCPT ); Fri, 5 Dec 2014 13:41:29 -0500 Received: from na6sys009bog035.obsmtp.com ([74.125.150.109]:34042 "HELO na6sys009bog035.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751164AbaLESl2 (ORCPT ); Fri, 5 Dec 2014 13:41:28 -0500 From: Joe Stringer To: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, shannon.nelson@intel.com, jesse.brandeburg@intel.com, jeffrey.t.kirsher@intel.com, therbert@google.com, jesse@nicira.com, linux.nics@intel.com Subject: [PATCHv4 net] i40e: Implement ndo_gso_check() Date: Fri, 5 Dec 2014 10:41:12 -0800 Message-Id: <1417804872-58635-1-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 --- v4: Simplify the check to just do tunnel header length. Fix #define style issue. v3: Drop IPIP and GRE (no driver support even though hw supports it). Check for UDP outer protocol for UDP tunnels. 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 | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index c3a7f4a..9eedfd15 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -7447,6 +7447,17 @@ static int i40e_ndo_fdb_dump(struct sk_buff *skb, #endif /* USE_DEFAULT_FDB_DEL_DUMP */ #endif /* HAVE_FDB_OPS */ +#define I40E_MAX_TUNNEL_HDR_LEN 80 +static bool i40e_gso_check(struct sk_buff *skb, struct net_device *dev) +{ + if (skb->encapsulation && + (skb_inner_mac_header(skb) - skb_transport_header(skb) > + I40E_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 +7498,7 @@ 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