From: Stephan Mueller <smueller@chronox.de>
To: Christoph Hellwig <hch@infradead.org>
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: Thu, 18 Jan 2018 08:32:16 +0100 [thread overview]
Message-ID: <3515099.j1gFXZBptz@tauon.chronox.de> (raw)
In-Reply-To: <20180117192213.GA21865@infradead.org>
Am Mittwoch, 17. Januar 2018, 20:22:13 CET schrieb Christoph Hellwig:
Hi Christoph,
> 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.
Thank you for the clarification. I think for the moment we have found another
solution that we are discussing at linux-crypto. Therefore, I would currently
not see the need for an additional support of CMSG in AIO.
Ciao
Stephan
prev parent reply other threads:[~2018-01-18 7:32 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
2018-01-18 7:32 ` Stephan Mueller [this message]
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