From: Christoph Hellwig <hch@infradead.org>
To: "Stephan Müller" <smueller@chronox.de>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-aio@kvack.org, netdev@vger.kernel.org
Subject: Re: AIO operation and CMSG
Date: Wed, 17 Jan 2018 11:22:13 -0800 [thread overview]
Message-ID: <20180117192213.GA21865@infradead.org> (raw)
In-Reply-To: <6214924.yszrlpR4T4@positron.chronox.de>
On Sun, Jan 14, 2018 at 09:01:00AM +0100, Stephan Müller wrote:
> The syscall io_submit sends data to the kernel and invokes the respective
> handler function in the kernel such as the recvmsg handler. What I am
> wondering is whether there is a way to send CMSG data along with the io_submit
> syscall? If not, is CMSG handling with the AIO syscalls possible at all?
Not as-is, but it could be easily added by repurposing unused fields
in the iocb. The big question is if it should be done to the existing
IOCB_CMD_PREADV/IOCB_CMD_PWRITEV types, or if new SENDMSG/RECVMSG ones
should be added instead.
Also you really want to Cc the relevant lists, I've only accidentally
seen this on linux-kernel.
>
> Thank you very much.
>
> [1] http://www.chronox.de/libkcapi.html
>
> Ciao
> Stephan
>
>
---end quoted text---
next prev parent reply other threads:[~2018-01-17 19:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-14 8:01 AIO operation and CMSG Stephan Müller
2018-01-17 19:22 ` Christoph Hellwig [this message]
2018-01-18 7:32 ` Stephan Mueller
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