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: <46280bc6-0db9-4526-aa7d-3e1143c33303@kernel.dk>
Date: Wed, 26 Nov 2025 15:19:00 -0700
From: Jens Axboe <axboe@...nel.dk>
To: Stefan Metzmacher <metze@...ba.org>, 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

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

This looks interesting, however!

-- 
Jens Axboe