netdev - Re: [PATCH net-next 5/6] net: udp: use kfree_skb_reason() in udp_queue_rcv_one

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Date:   Tue, 25 Jan 2022 19:25:10 -0700
From:   David Ahern <dsahern@...il.com>
To:     menglong8.dong@...il.com, kuba@...nel.org
Cc:     rostedt@...dmis.org, mingo@...hat.com, davem@...emloft.net,
        yoshfuji@...ux-ipv6.org, dsahern@...nel.org, pablo@...filter.org,
        kadlec@...filter.org, fw@...len.de, imagedong@...cent.com,
        edumazet@...gle.com, alobakin@...me, paulb@...dia.com,
        pabeni@...hat.com, talalahmad@...gle.com, haokexin@...il.com,
        keescook@...omium.org, memxor@...il.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        cong.wang@...edance.com
Subject: Re: [PATCH net-next 5/6] net: udp: use kfree_skb_reason() in
 udp_queue_rcv_one_skb()

On 1/24/22 6:15 AM, menglong8.dong@...il.com wrote:
> diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
> index 603f77ef2170..dd64a4f2ff1d 100644
> --- a/include/linux/skbuff.h
> +++ b/include/linux/skbuff.h
> @@ -330,6 +330,7 @@ enum skb_drop_reason {
>  	SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST,
>  	SKB_DROP_REASON_XFRM_POLICY,
>  	SKB_DROP_REASON_IP_NOPROTO,
> +	SKB_DROP_REASON_UDP_FILTER,

Is there really a need for a UDP and TCP version? why not just:

	/* dropped due to bpf filter on socket */
	SKB_DROP_REASON_SOCKET_FILTER

>  	SKB_DROP_REASON_MAX,
>  };
>