linux-kernel - Re: [PATCH 09/14] target/configfs: Expose protection device attributes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1389637859.5567.431.camel@haakon3.risingtidesystems.com>
Date:	Mon, 13 Jan 2014 10:30:59 -0800
From:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc:	"Nicholas A. Bellinger" <nab@...erainc.com>,
	target-devel <target-devel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
	Sagi Grimberg <sagig@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>
Subject: Re: [PATCH 09/14] target/configfs: Expose protection device
 attributes

Hey MKP,

On Fri, 2014-01-10 at 16:01 -0500, Martin K. Petersen wrote:
> >>>>> "nab" == Nicholas A Bellinger <nab@...erainc.com> writes:
> 
> nab> This patch adds support for exposing DIF protection device
> nab> attributes via configfs.  This includes:
> 
> nab>    pi_prot_type: Protection Type (0, 1, 3 currently support)
> nab>    pi_prot_version: Protection Version (DIF v1 currently supported)
> 
> What's DIF v2?
> 

This would be the proposed 16-byte protection scheme for SBC4.

> nab>    pi_guard_type: Guard Type (1=DIF CRC, 2=IP CRC)
> 
> The IP checksum is only supported by DIX between OS and initiator, not
> by the target. I guess we could signal to the initiator via a
> vendor-private VPD that IP checksum is supported directly. But now what
> we have hardware-accelerated T10 CRC I don't think it's a big deal.
> 
> (scsi_debug supports IP checksum because it's both initiator and
> target).
> 

In that case, dropping the IP checksum related code now..

--nab

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/