linux-kernel - Re: [PATCH net-next v2 0/9] net: add skb drop reasons to TCP packet receive

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Date:   Fri, 18 Feb 2022 10:51:25 -0800
From:   Eric Dumazet <edumazet@...gle.com>
To:     Menglong Dong <menglong8.dong@...il.com>
Cc:     David Ahern <dsahern@...nel.org>, Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...emloft.net>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        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>,
        Talal Ahmad <talalahmad@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>,
        Alexander Lobakin <alobakin@...me>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Antoine Tenart <atenart@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Paolo Abeni <pabeni@...hat.com>,
        Yunsheng Lin <linyunsheng@...wei.com>,
        Arnd Bergmann <arnd@...db.de>,
        Yajun Deng <yajun.deng@...ux.dev>,
        Roopa Prabhu <roopa@...dia.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Vasily Averin <vvs@...tuozzo.com>,
        Cong Wang <cong.wang@...edance.com>,
        Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        flyingpeng@...cent.com
Subject: Re: [PATCH net-next v2 0/9] net: add skb drop reasons to TCP packet receive

On Fri, Feb 18, 2022 at 12:32 AM <menglong8.dong@...il.com> wrote:
>
> From: Menglong Dong <imagedong@...cent.com>
>
> In the commit c504e5c2f964 ("net: skb: introduce kfree_skb_reason()"),
> we added the support of reporting the reasons of skb drops to kfree_skb
> tracepoint. And in this series patches, reasons for skb drops are added
> to TCP layer (both TCPv4 and TCPv6 are considered).
> Following functions are processed:
>

>
> /* SKB_DROP_REASON_TCP_MD5* corresponding to LINUX_MIB_TCPMD5* */
> SKB_DROP_REASON_TCP_MD5NOTFOUND
> SKB_DROP_REASON_TCP_MD5UNEXPECTED
> SKB_DROP_REASON_TCP_MD5FAILURE
> SKB_DROP_REASON_SOCKET_BACKLOG
> SKB_DROP_REASON_TCP_FLAGS
> SKB_DROP_REASON_TCP_ZEROWINDOW
> SKB_DROP_REASON_TCP_OLD_DATA
> SKB_DROP_REASON_TCP_OVERWINDOW
> /* corresponding to LINUX_MIB_TCPOFOMERGE */
> SKB_DROP_REASON_TCP_OFOMERGE
>

For the whole series:

Reviewed-by: Eric Dumazet <edumazet@...gle.com>

Thanks !