From: Christoph Hellwig <hch@infradead.org>
To: Hannes Reinecke <hare@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-scsi@vger.kernel.org,
James Bottomley <jbottomley@parallels.com>
Subject: Re: [PATCH 2/5] scsi_scan: Restrict sequential scan to 256 LUNs
Date: Thu, 22 May 2014 02:08:47 -0700 [thread overview]
Message-ID: <20140522090847.GC14854@infradead.org> (raw)
In-Reply-To: <1400583791-123120-3-git-send-email-hare@suse.de>
On Tue, May 20, 2014 at 01:03:08PM +0200, Hannes Reinecke wrote:
> Sequential scan for more than 256 LUNs is very fragile as
> LUNs might not be numbered sequentially after that point.
>
> SAM revisions later than SCSI-3 impose a structure on
> LUNs larger than 256, making LUN numbers between 256
> and 16384 illegal.
> SCSI-3, however allows for plain 64-bit numbers with
> no internal structure.
>
> So restrict sequential LUN scan to 256 LUNs and add a
> new blacklist flag 'BLIST_SCSI3LUN' to scan up to
> max_lun devices.
Looks good,
Reviewed-by: Christoph Hellwig <hch@lst.de>
Do you know any common devices reporting SCSI-2? I've only really seen
SCSI-2 and never SBC levels in practical use.
next prev parent reply other threads:[~2014-05-22 9:08 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-20 11:03 [PATCHv2 0/5] Support 64-bit LUNs Hannes Reinecke
2014-05-20 11:03 ` [PATCH 1/5] scsi: Remove CONFIG_SCSI_MULTI_LUN Hannes Reinecke
2014-05-22 9:07 ` Christoph Hellwig
2014-05-20 11:03 ` [PATCH 2/5] scsi_scan: Restrict sequential scan to 256 LUNs Hannes Reinecke
2014-05-22 9:08 ` Christoph Hellwig [this message]
2014-05-20 11:03 ` [PATCH 3/5] qla2xxx: Restrict max_lun to 16-bit for older HBAs Hannes Reinecke
2014-05-20 13:32 ` Chad Dupuis
2014-05-22 9:09 ` Christoph Hellwig
2014-05-20 11:03 ` [PATCH 4/5] scsi: use 64-bit LUNs Hannes Reinecke
2014-05-22 9:10 ` Christoph Hellwig
2014-05-20 11:03 ` [PATCH 5/5] scsi: use 64-bit value for 'max_luns' Hannes Reinecke
2014-05-22 9:10 ` Christoph Hellwig
2014-05-28 10:56 ` [PATCHv2 0/5] Support 64-bit LUNs Christoph Hellwig
2014-05-29 8:39 ` James Bottomley
2014-05-28 20:30 ` Ewan Milne
-- strict thread matches above, loose matches on Subject: below --
2013-12-10 11:05 [PATCH 0/5][RFC] " Hannes Reinecke
2013-12-10 11:05 ` [PATCH 2/5] scsi_scan: Restrict sequential scan to 256 LUNs Hannes Reinecke
2014-03-27 14:49 ` Christoph Hellwig
2014-03-28 8:22 ` Hannes Reinecke
2014-03-28 12:47 ` Christoph Hellwig
2014-03-28 13:19 ` Hannes Reinecke
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