From: Christoph Hellwig <hch@lst.de>
To: Keith Busch <keith.busch@intel.com>
Cc: "Christoph Hellwig" <hch@lst.de>,
"Javier González" <jg@lightnvm.io>,
sagi@grimberg.me, linux-nvme@lists.infradead.org,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
"Javier González" <javier@cnexlabs.com>
Subject: Re: [PATCH 1/3] nvme: do not check for ns on rw path
Date: Sat, 4 Nov 2017 09:18:25 +0100 [thread overview]
Message-ID: <20171104081825.GA19180@lst.de> (raw)
In-Reply-To: <20171103150203.GA11300@localhost.localdomain>
On Fri, Nov 03, 2017 at 09:02:04AM -0600, Keith Busch wrote:
> If the namespace has metadata, but the request doesn't have a metadata
> payload attached to it for whatever reason, we can't construct the command
> for that format. We also can't have the controller strip/generate the
> payload with PRACT bit set if it's not a T10 format, so we just fail
> the command.
The only metadata payload a READ or WRITE request can have is a protection
information one. For a namespace formatted with protection information
bio_integrity_prep as called from blk_mq_make_request will ensure we
always have metadata attached.
If a namespace is formatted with non-PI metadata we will never have
metadata attached to the bio/request and should not even present the
namespace to the kernel.
next prev parent reply other threads:[~2017-11-04 8:18 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-03 10:02 [PATCH 0/3] nvme: small fixes reported by smatch Javier González
2017-11-03 10:02 ` [PATCH 1/3] nvme: do not check for ns on rw path Javier González
2017-11-03 12:53 ` Christoph Hellwig
2017-11-03 13:00 ` Javier González
2017-11-03 15:02 ` Keith Busch
2017-11-04 8:18 ` Christoph Hellwig [this message]
2017-11-04 15:38 ` Keith Busch
2017-11-06 9:13 ` Christoph Hellwig
2017-11-06 14:43 ` Keith Busch
2017-11-03 10:02 ` [PATCH 2/3] nvme: compare NQN string with right size Javier González
2017-11-03 12:54 ` Christoph Hellwig
2017-11-03 12:56 ` Javier González
2017-11-03 10:02 ` [PATCH 3/3] nvme: fix eui_show() print format Javier González
2017-11-03 12:55 ` Christoph Hellwig
2017-11-03 15:13 ` Keith Busch
2017-11-03 15:16 ` Joe Perches
2017-11-04 11:22 ` Javier González
2017-11-07 16:28 ` Christoph Hellwig
2017-11-07 16:36 ` Javier González
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