netdev - Re: [PATCH net v2 2/3] net/sched: flow_dissector: Fix matching on zone id for invalid conns

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Message-ID: <20211210205216.1ec35b39@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 10 Dec 2021 20:52:16 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Paul Blakey <paulb@...dia.com>
Cc:     <dev@...nvswitch.org>, <netdev@...r.kernel.org>,
        Saeed Mahameed <saeedm@...dia.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        "Pravin B Shelar" <pshelar@....org>, <davem@...emloft.net>,
        Jiri Pirko <jiri@...dia.com>, wenxu <wenxu@...oud.cn>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Oz Shlomo <ozsh@...dia.com>, Vlad Buslov <vladbu@...dia.com>,
        Roi Dayan <roid@...dia.com>
Subject: Re: [PATCH net v2 2/3] net/sched: flow_dissector: Fix matching on
 zone id for invalid conns

On Thu, 9 Dec 2021 09:57:33 +0200 Paul Blakey wrote:
> @@ -238,10 +239,12 @@ void
>  skb_flow_dissect_ct(const struct sk_buff *skb,
>  		    struct flow_dissector *flow_dissector,
>  		    void *target_container, u16 *ctinfo_map,
> -		    size_t mapsize, bool post_ct)
> +		    size_t mapsize)
>  {
>  #if IS_ENABLED(CONFIG_NF_CONNTRACK)
> +	bool post_ct = tc_skb_cb(skb)->post_ct;
>  	struct flow_dissector_key_ct *key;
> +	u16 zone = tc_skb_cb(skb)->zone;
>  	enum ip_conntrack_info ctinfo;
>  	struct nf_conn_labels *cl;
>  	struct nf_conn *ct;
> @@ -260,6 +263,7 @@ skb_flow_dissect_ct(const struct sk_buff *skb,
>  	if (!ct) {
>  		key->ct_state = TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
>  				TCA_FLOWER_KEY_CT_FLAGS_INVALID;
> +		key->ct_zone = zone;
>  		return;
>  	}
>  

Why is flow dissector expecting skb cb to be TC now?
Please keep the appropriate abstractions intact.