linux-kernel - Re: [PATCH v3 01/16] nvmet: report ioccsz and iorcsz for disc ctrl

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Message-ID: <6a308db3-d487-413a-9ee9-9206463d6308@nvidia.com>
Date: Wed, 20 Dec 2023 02:50:34 +0200
From: Max Gurtovoy <mgurtovoy@...dia.com>
To: Christoph Hellwig <hch@....de>, Daniel Wagner <dwagner@...e.de>
Cc: linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Sagi Grimberg <sagi@...mberg.me>, Keith Busch <kbusch@...nel.org>,
 James Smart <james.smart@...adcom.com>, Hannes Reinecke <hare@...e.de>
Subject: Re: [PATCH v3 01/16] nvmet: report ioccsz and iorcsz for disc ctrl



On 19/12/2023 6:27, Christoph Hellwig wrote:
> On Mon, Dec 18, 2023 at 04:30:49PM +0100, Daniel Wagner wrote:
>> +	/*
>> +	 * Max command capsule size is sqe + in-capsule data size.
>> +	 * Disable in-capsule data for Metadata capable controllers.
> 
> A why on the disable would be useful here - the fact that it is disabled
> is pretty obvious from the code.
> 

We have another thread on this patch that I think is wrong since the 
discovery controller shouldn't set these values according to the spec. 
It is explicitly say that ioccsz and iorcsz are reserved for discovery 
controllers.

I've sent a proposal to fix the initiator/host code.