From: Jens Axboe <[email protected]>
To: Bob Liu <[email protected]>, [email protected]
Cc: [email protected], [email protected],
[email protected], [email protected]
Subject: Re: [RFC PATCH 0/4] userspace PI passthrough via io_uring
Date: Wed, 26 Feb 2020 07:25:11 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 2/26/20 1:37 AM, Bob Liu wrote:
> This RFC provides a rough implementation of a mechanism to allow
> userspace to attach protection information (e.g. T10 DIF) data to a
> disk write and to receive the information alongside a disk read.
> The interface is an extension to the io_uring interface:
> two new commands (IORING_OP_READV{WRITEV}_PI) are provided.
> The last struct iovec in the arg list is interpreted to point to a buffer
> containing the the PI data.
>
> Patch #1 add two new commands to io_uring.
> Patch #2 introduces two helper funcs in bio-integrity.
> Patch #3 implement the PI passthrough in direct-io of block-dev.
> (Similar extensions may add to fs/direct-io.c and fs/maps/directio.c)
> Patch #4 add io_uring use space test case to liburing.
No strong feelings on the support in general, the io_uring bits are
trivial enough (once fixed up, per comments in that patch) that I
have no objections on that front.
I'd really like Martin to render an opinion on the API (PI info in
last vec), since he's the integrity guy.
--
Jens Axboe
prev parent reply other threads:[~2020-02-26 14:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 8:37 [RFC PATCH 0/4] userspace PI passthrough via io_uring Bob Liu
2020-02-26 8:37 ` [PATCH 1/4] io_uring: add IORING_OP_READ{WRITE}V_PI cmd Bob Liu
2020-02-26 14:24 ` Jens Axboe
2020-02-26 15:57 ` Christoph Hellwig
2020-02-26 15:58 ` Jens Axboe
2020-02-26 16:03 ` Darrick J. Wong
2020-02-26 16:53 ` Christoph Hellwig
2020-02-27 9:19 ` Bob Liu
2020-02-27 9:05 ` Bob Liu
2020-02-26 8:37 ` [PATCH 2/4] bio-integrity: introduce two funcs handle protect information Bob Liu
2020-02-26 16:03 ` Darrick J. Wong
2020-02-27 9:23 ` Bob Liu
2020-02-26 8:37 ` [PATCH 3/4] block_dev: support protect information passthrough Bob Liu
2020-02-26 16:04 ` Darrick J. Wong
2020-02-26 8:37 ` [PATCH 4/4] liburing/test: add testcase for " Bob Liu
2020-02-26 14:25 ` Jens Axboe [this message]
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