From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joseph Gasparakis Subject: [PATCH v3 2/4] net: Handle encapsulated offloads before fragmentation or handing to lower dev Date: Thu, 6 Dec 2012 17:56:57 -0800 Message-ID: <1354845419-22483-3-git-send-email-joseph.gasparakis@intel.com> References: <1354845419-22483-1-git-send-email-joseph.gasparakis@intel.com> Cc: Alexander Duyck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dmitry@broadcom.com, saeed.bishara@gmail.com To: davem@davemloft.net, shemminger@vyatta.com, chrisw@sous-sol.org, gospo@redhat.com Return-path: In-Reply-To: <1354845419-22483-1-git-send-email-joseph.gasparakis@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Alexander Duyck This change allows the VXLAN to enable Tx checksum offloading even on devices that do not support encapsulated checksum offloads. The advantage to this is that it allows for the lower device to change due to routing table changes without impacting features on the VXLAN itself. Signed-off-by: Alexander Duyck --- net/core/dev.c | 15 +++++++++++++-- net/ipv4/ip_output.c | 4 ++++ 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/net/core/dev.c b/net/core/dev.c index 2a5f5586..7a2646a 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2324,6 +2324,13 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, skb->vlan_tci = 0; } + /* If encapsulation offload request, verify we are testing + * hardware encapsulation features instead of standard + * features for the netdev + */ + if (skb->encapsulation) + features &= dev->hw_enc_features; + if (netif_needs_gso(skb, features)) { if (unlikely(dev_gso_segment(skb, features))) goto out_kfree_skb; @@ -2339,8 +2346,12 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, * checksumming here. */ if (skb->ip_summed == CHECKSUM_PARTIAL) { - skb_set_transport_header(skb, - skb_checksum_start_offset(skb)); + if (skb->encapsulation) + skb_set_inner_transport_header(skb, + skb_checksum_start_offset(skb)); + else + skb_set_transport_header(skb, + skb_checksum_start_offset(skb)); if (!(features & NETIF_F_ALL_CSUM) && skb_checksum_help(skb)) goto out_kfree_skb; diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 6537a40..3e98ed2 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -595,6 +595,10 @@ slow_path_clean: } slow_path: + /* for offloaded checksums cleanup checksum before fragmentation */ + if ((skb->ip_summed == CHECKSUM_PARTIAL) && skb_checksum_help(skb)) + goto fail; + left = skb->len - hlen; /* Space per frame */ ptr = hlen; /* Where to start from */ -- 1.7.6.4