linux-kernel - Re: [PATCH net-next 1/7] net: dev: use kfree_skb_reason() for sch_handle

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Message-ID: <20220303210544.5036cf7c@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Thu, 3 Mar 2022 21:05:44 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Menglong Dong <menglong8.dong@...il.com>
Cc:     David Ahern <dsahern@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        David Miller <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Menglong Dong <imagedong@...cent.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Talal Ahmad <talalahmad@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Alexander Lobakin <alobakin@...me>, flyingpeng@...cent.com,
        Mengen Sun <mengensun@...cent.com>,
        Antoine Tenart <atenart@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Arnd Bergmann <arnd@...db.de>, Paolo Abeni <pabeni@...hat.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Vasily Averin <vvs@...tuozzo.com>,
        Cong Wang <cong.wang@...edance.com>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH net-next 1/7] net: dev: use kfree_skb_reason() for
 sch_handle_egress()

On Fri, 4 Mar 2022 12:56:40 +0800 Menglong Dong wrote:
> You are right, I think I misunderstanded the concept of qdisc and tc before.
> and seems all 'QDISC' here should be 'TC'? which means:
> 
> QDISC_EGRESS -> TC_EGRESS
> QDISC_DROP -> TC_DROP

For this one QDISC is good, I think, it will mostly catch packets 
which went thru qdisc_drop(), right?

> QDISC_INGRESS -> TC_INGRESS