linux-kernel - Re: [PATCH] io_uring/net: wire up support for sk->sk_prot->uring_cmd() with SOCKET_URING_OP_PASSTHROUGH

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Message-ID: <b36b09c0-95ad-4437-8076-9d8d73a6dbc6@samba.org>
Date: Thu, 27 Nov 2025 11:00:45 +0100
From: Stefan Metzmacher <metze@...ba.org>
To: Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org
Cc: "David S . Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
 Kuniyuki Iwashima <kuniyu@...gle.com>, Willem de Bruijn
 <willemb@...gle.com>, netdev@...r.kernel.org, linux-cifs@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] io_uring/net: wire up support for
 sk->sk_prot->uring_cmd() with SOCKET_URING_OP_PASSTHROUGH_FLAG

Am 26.11.25 um 23:19 schrieb Jens Axboe:
> On 11/26/25 4:19 AM, Stefan Metzmacher wrote:
>> This will allow network protocols to implement async operations
>> instead of using ioctl() syscalls.
>>
>> By using the high bit there's more than enough room for generic
>> calls to be added, but also more than enough for protocols to
>> implement their own specific opcodes.
>>
>> The IPPROTO_SMBDIRECT socket layer [1] I'm currently working on,
>> will use this in future in order to let Samba use efficient RDMA offload.
> 
> Patch looks fine to me, but I think it needs to be submitted with an
> actual user of it too. If not, then it's just unused infrastructure...
> 
>> [1]
>> https://git.samba.org/?p=metze/linux/wip.git;a=shortlog;h=refs/heads/master-ipproto-smbdirect

Ok, thanks for the feedback, I'll resubmit once I'm ready to use it.

metze