From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:41320 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755210AbeDJWdY (ORCPT ); Tue, 10 Apr 2018 18:33:24 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tom Herbert , David Lebrun , "David S. Miller" Subject: [PATCH 4.15 156/168] ipv6: sr: fix seg6 encap performances with TSO enabled Date: Wed, 11 Apr 2018 00:24:58 +0200 Message-Id: <20180410212807.720578017@linuxfoundation.org> In-Reply-To: <20180410212800.144079021@linuxfoundation.org> References: <20180410212800.144079021@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: David Lebrun [ Upstream commit 5807b22c9164a21cd1077a9bc587f0bba361f72d ] Enabling TSO can lead to abysmal performances when using seg6 in encap mode, such as with the ixgbe driver. This patch adds a call to iptunnel_handle_offloads() to remove the encapsulation bit if needed. Before: root@comp4-seg6bpf:~# iperf3 -c fc00::55 Connecting to host fc00::55, port 5201 [ 4] local fc45::4 port 36592 connected to fc00::55 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 196 KBytes 1.60 Mbits/sec 47 6.66 KBytes [ 4] 1.00-2.00 sec 304 KBytes 2.49 Mbits/sec 100 5.33 KBytes [ 4] 2.00-3.00 sec 284 KBytes 2.32 Mbits/sec 92 5.33 KBytes After: root@comp4-seg6bpf:~# iperf3 -c fc00::55 Connecting to host fc00::55, port 5201 [ 4] local fc45::4 port 43062 connected to fc00::55 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 1.03 GBytes 8.89 Gbits/sec 0 743 KBytes [ 4] 1.00-2.00 sec 1.03 GBytes 8.87 Gbits/sec 0 743 KBytes [ 4] 2.00-3.00 sec 1.03 GBytes 8.87 Gbits/sec 0 743 KBytes Reported-by: Tom Herbert Fixes: 6c8702c60b88 ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels") Signed-off-by: David Lebrun Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv6/seg6_iptunnel.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) --- a/net/ipv6/seg6_iptunnel.c +++ b/net/ipv6/seg6_iptunnel.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -211,11 +212,6 @@ static int seg6_do_srh(struct sk_buff *s tinfo = seg6_encap_lwtunnel(dst->lwtstate); - if (likely(!skb->encapsulation)) { - skb_reset_inner_headers(skb); - skb->encapsulation = 1; - } - switch (tinfo->mode) { case SEG6_IPTUN_MODE_INLINE: if (skb->protocol != htons(ETH_P_IPV6)) @@ -224,10 +220,12 @@ static int seg6_do_srh(struct sk_buff *s err = seg6_do_srh_inline(skb, tinfo->srh); if (err) return err; - - skb_reset_inner_headers(skb); break; case SEG6_IPTUN_MODE_ENCAP: + err = iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6); + if (err) + return err; + if (skb->protocol == htons(ETH_P_IPV6)) proto = IPPROTO_IPV6; else if (skb->protocol == htons(ETH_P_IP)) @@ -239,6 +237,8 @@ static int seg6_do_srh(struct sk_buff *s if (err) return err; + skb_set_inner_transport_header(skb, skb_transport_offset(skb)); + skb_set_inner_protocol(skb, skb->protocol); skb->protocol = htons(ETH_P_IPV6); break; case SEG6_IPTUN_MODE_L2ENCAP: @@ -262,8 +262,6 @@ static int seg6_do_srh(struct sk_buff *s ipv6_hdr(skb)->payload_len = htons(skb->len - sizeof(struct ipv6hdr)); skb_set_transport_header(skb, sizeof(struct ipv6hdr)); - skb_set_inner_protocol(skb, skb->protocol); - return 0; }