linux-kernel - Re: [PATCH net-next 3/3] net: neigh: add skb drop reasons to arp_error

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Date:   Mon, 21 Feb 2022 20:19:22 -0700
From:   David Ahern <dsahern@...nel.org>
To:     menglong8.dong@...il.com, kuba@...nel.org
Cc:     rostedt@...dmis.org, mingo@...hat.com, davem@...emloft.net,
        yoshfuji@...ux-ipv6.org, imagedong@...cent.com,
        edumazet@...gle.com, alobakin@...me, cong.wang@...edance.com,
        paulb@...dia.com, talalahmad@...gle.com, keescook@...omium.org,
        ilias.apalodimas@...aro.org, memxor@...il.com,
        flyingpeng@...cent.com, mengensun@...cent.com,
        daniel@...earbox.net, yajun.deng@...ux.dev, roopa@...dia.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 3/3] net: neigh: add skb drop reasons to
 arp_error_report()

On 2/20/22 8:57 AM, menglong8.dong@...il.com wrote:
> From: Menglong Dong <imagedong@...cent.com>
> 
> When neighbour become invalid or destroyed, neigh_invalidate() will be
> called. neigh->ops->error_report() will be called if the neighbour's
> state is NUD_FAILED, and seems here is the only use of error_report().
> So we can tell that the reason of skb drops in arp_error_report() is
> SKB_DROP_REASON_NEIGH_FAILED.
> 
> Replace kfree_skb() used in arp_error_report() with kfree_skb_reason().
> 
> Reviewed-by: Mengen Sun <mengensun@...cent.com>
> Reviewed-by: Hao Peng <flyingpeng@...cent.com>
> Signed-off-by: Menglong Dong <imagedong@...cent.com>
> ---
>  net/ipv4/arp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
Reviewed-by: David Ahern <dsahern@...nel.org>