netdev - Re: [PATCH v1 net-next 02/15] net: Introduce direct data placement tcp offload

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Date:   Tue, 8 Dec 2020 18:11:29 -0700
From:   David Ahern <dsahern@...il.com>
To:     Boris Pismenny <borisp@...lanox.com>, kuba@...nel.org,
        davem@...emloft.net, saeedm@...dia.com, hch@....de,
        sagi@...mberg.me, axboe@...com, kbusch@...nel.org,
        viro@...iv.linux.org.uk, edumazet@...gle.com
Cc:     boris.pismenny@...il.com, linux-nvme@...ts.infradead.org,
        netdev@...r.kernel.org, benishay@...dia.com, ogerlitz@...dia.com,
        yorayz@...dia.com, Ben Ben-Ishay <benishay@...lanox.com>,
        Or Gerlitz <ogerlitz@...lanox.com>,
        Yoray Zack <yorayz@...lanox.com>
Subject: Re: [PATCH v1 net-next 02/15] net: Introduce direct data placement
 tcp offload

On 12/8/20 5:57 PM, David Ahern wrote:
>> diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
>> index 7338b3865a2a..a08b85b53aa8 100644
>> --- a/include/net/inet_connection_sock.h
>> +++ b/include/net/inet_connection_sock.h
>> @@ -66,6 +66,8 @@ struct inet_connection_sock_af_ops {
>>   * @icsk_ulp_ops	   Pluggable ULP control hook
>>   * @icsk_ulp_data	   ULP private data
>>   * @icsk_clean_acked	   Clean acked data hook
>> + * @icsk_ulp_ddp_ops	   Pluggable ULP direct data placement control hook
>> + * @icsk_ulp_ddp_data	   ULP direct data placement private data
> 
> Neither of these socket layer intrusions are needed. All references but
> 1 -- the skbuff check -- are in the mlx5 driver. Any skb check that is
> needed can be handled with a different setting.

missed the nvme ops for the driver to callback to the socket owner.