From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7751C433E0 for ; Fri, 31 Jul 2020 02:45:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BF3232083E for ; Fri, 31 Jul 2020 02:45:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731198AbgGaCpF (ORCPT ); Thu, 30 Jul 2020 22:45:05 -0400 Received: from mail-proxy25223.qiye.163.com ([103.129.252.23]:11600 "EHLO mail-proxy25223.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731124AbgGaCpE (ORCPT ); Thu, 30 Jul 2020 22:45:04 -0400 Received: from localhost.localdomain (unknown [123.59.132.129]) by m9784.mail.qiye.163.com (Hmail) with ESMTPA id E5DD241A45; Fri, 31 Jul 2020 10:45:01 +0800 (CST) From: wenxu@ucloud.cn To: xiyou.wangcong@gmail.com Cc: netdev@vger.kernel.org Subject: [PATCH net v2] net/sched: act_ct: fix miss set mru for ovs after defrag in act_ct Date: Fri, 31 Jul 2020 10:45:01 +0800 Message-Id: <1596163501-7113-1-git-send-email-wenxu@ucloud.cn> X-Mailer: git-send-email 1.8.3.1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgYFAkeWUFZS1VLWVdZKFlBSUI3V1ktWUFJV1kPCR oVCBIfWUFZQkIZT0oeSENKHkpDVkpOQk1KTUhOS0pCQklVGRETFhoSFyQUDg9ZV1kWGg8SFR0UWU FZT0tIVUpKS0hKTFVKS0tZBg++ X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6Oj46ARw4Cj5OLzciHSNKCgEZ ECtPChxVSlVKTkJNSk1ITktJSUhNVTMWGhIXVQweFQMOOw4YFxQOH1UYFUVZV1kSC1lBWUpJSFVO QlVKSElVSklCWVdZCAFZQU9JS0I3Bg++ X-HM-Tid: 0a73a2c22f802086kuqye5dd241a45 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: wenxu When openvswitch conntrack offload with act_ct action. Fragment packets defrag in the ingress tc act_ct action and miss the next chain. Then the packet pass to the openvswitch datapath without the mru. The over mtu packet will be dropped in output action in openvswitch for over mtu. "kernel: net2: dropped over-mtu packet: 1528 > 1500" This patch add mru in the tc_skb_ext for adefrag and miss next chain situation. And also add mru in the qdisc_skb_cb. The act_ct set the mru to the qdisc_skb_cb when the packet defrag. And When the chain miss, The mru is set to tc_skb_ext which can be got by ovs datapath. Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct") Signed-off-by: wenxu --- include/linux/skbuff.h | 1 + include/net/sch_generic.h | 3 ++- net/openvswitch/flow.c | 1 + net/sched/act_ct.c | 8 ++++++-- net/sched/cls_api.c | 1 + 5 files changed, 11 insertions(+), 3 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 0c0377f..0d842d6 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -283,6 +283,7 @@ struct nf_bridge_info { */ struct tc_skb_ext { __u32 chain; + __u16 mru; }; #endif diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index c510b03..d60e7c3 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -384,6 +384,7 @@ struct qdisc_skb_cb { }; #define QDISC_CB_PRIV_LEN 20 unsigned char data[QDISC_CB_PRIV_LEN]; + u16 mru; }; typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv); @@ -463,7 +464,7 @@ static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) { struct qdisc_skb_cb *qcb; - BUILD_BUG_ON(sizeof(skb->cb) < offsetof(struct qdisc_skb_cb, data) + sz); + BUILD_BUG_ON(sizeof(skb->cb) < sizeof(*qcb)); BUILD_BUG_ON(sizeof(qcb->data) < sz); } diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c index 9d375e7..03942c3 100644 --- a/net/openvswitch/flow.c +++ b/net/openvswitch/flow.c @@ -890,6 +890,7 @@ int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info, if (static_branch_unlikely(&tc_recirc_sharing_support)) { tc_ext = skb_ext_find(skb, TC_SKB_EXT); key->recirc_id = tc_ext ? tc_ext->chain : 0; + OVS_CB(skb)->mru = tc_ext ? tc_ext->mru : 0; } else { key->recirc_id = 0; } diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c index 5928efb..69445ab 100644 --- a/net/sched/act_ct.c +++ b/net/sched/act_ct.c @@ -706,8 +706,10 @@ static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb, if (err && err != -EINPROGRESS) goto out_free; - if (!err) + if (!err) { *defrag = true; + cb.mru = IPCB(skb)->frag_max_size; + } } else { /* NFPROTO_IPV6 */ #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6) enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone; @@ -717,8 +719,10 @@ static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb, if (err && err != -EINPROGRESS) goto out_free; - if (!err) + if (!err) { *defrag = true; + cb.mru = IP6CB(skb)->frag_max_size; + } #else err = -EOPNOTSUPP; goto out_free; diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 4619cb3..eb6acc5 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -1627,6 +1627,7 @@ int tcf_classify_ingress(struct sk_buff *skb, if (WARN_ON_ONCE(!ext)) return TC_ACT_SHOT; ext->chain = last_executed_chain; + ext->mru = qdisc_skb_cb(skb)->mru; } return ret; -- 1.8.3.1