From: hch@infradead.org (Christoph Hellwig)
Subject: Question on NVMe SCSI Translation Ref 1.5
Date: Fri, 20 Nov 2015 10:32:06 -0800 [thread overview]
Message-ID: <20151120183206.GA11043@infradead.org> (raw)
In-Reply-To: <BL2PR04MB1634A1D6C773CDEC0C45D9A921A0@BL2PR04MB163.namprd04.prod.outlook.com>
Hi Jeffrey,
SG_IO is sent to a device node. For actualy SCSI devices you'll
get the LUN from sdev->lun. For NVMe there obviously aren't any LUNs,
so you'll have to come up with a tranlation. The current Linux driver
translated namespaces 1 to LUN 0 and so on. In general sending a
REPORT LUNS to a NVMe device node does not seem very useful, and I have
no idea why it even was specified. Then again the whole SCSI
translation layer concept seems incredbile braindead and I think we
should at least optionally remove it from the NVMe driver.
next prev parent reply other threads:[~2015-11-20 18:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-20 18:02 Question on NVMe SCSI Translation Ref 1.5 Jeffrey Lien
2015-11-20 18:32 ` Christoph Hellwig [this message]
2015-11-20 19:54 ` Robles, Raymond C
2015-11-21 8:18 ` 'Christoph Hellwig'
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