From: Keith Busch <keith.busch@intel.com>
To: Christoph Hellwig <hch@lst.de>
Cc: "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: Fri, 3 Nov 2017 09:02:04 -0600 [thread overview]
Message-ID: <20171103150203.GA11300@localhost.localdomain> (raw)
In-Reply-To: <20171103125339.GA25186@lst.de>
On Fri, Nov 03, 2017 at 01:53:40PM +0100, Christoph Hellwig wrote:
> > - if (ns && ns->ms &&
> > + if (ns->ms &&
> > (!ns->pi_type || ns->ms != sizeof(struct t10_pi_tuple)) &&
> > !blk_integrity_rq(req) && !blk_rq_is_passthrough(req))
> > return BLK_STS_NOTSUPP;
>
> blk_rq_is_passthrough also can't be true here.
>
> How about:
>
> if (ns->ms && !blk_integrity_rq(req) &&
> (!ns->pi_type || ns->ms != sizeof(struct t10_pi_tuple)))
> return BLK_STS_NOTSUPP;
>
> Although I have to admit I don't really understand what this check
> is even trying to do. It basically checks for a namespace that has
> a format with metadata that is not T10 protection information and
> then rejects all I/O to it. Why are we even creating a block device
> node for such a thing?
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.
next prev parent reply other threads:[~2017-11-03 14:57 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 [this message]
2017-11-04 8:18 ` Christoph Hellwig
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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