netdev - Re: [PATCH net-next 2/4] net: add pskb_may_pull

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Message-ID: <efbe9257-9b50-2194-6783-fb41300ff113@kernel.org>
Date:   Fri, 10 Feb 2023 12:24:23 -0700
From:   David Ahern <dsahern@...nel.org>
To:     Eric Dumazet <edumazet@...gle.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next 2/4] net: add pskb_may_pull_reason() helper

On 2/10/23 11:47 AM, Eric Dumazet wrote:
> pskb_may_pull() can fail for two different reasons.
> 
> Provide pskb_may_pull_reason() helper to distinguish
> between these reasons.
> 
> It returns:
> 
> SKB_NOT_DROPPED_YET           : Success
> SKB_DROP_REASON_PKT_TOO_SMALL : packet too small
> SKB_DROP_REASON_NOMEM         : skb->head could not be resized
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  include/linux/skbuff.h | 19 +++++++++++++++----
>  1 file changed, 15 insertions(+), 4 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>