linux-kernel - Re: [PATCH v5 3/6] coresight: configfs: Add in binary attributes to load files

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Date:   Tue, 27 Dec 2022 09:09:42 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Mike Leach <mike.leach@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
        linux-kernel@...r.kernel.org, mathieu.poirier@...aro.org,
        suzuki.poulose@....com, acme@...nel.org, james.clark@....com
Subject: Re: [PATCH v5 3/6] coresight: configfs: Add in binary attributes to
 load files

On Mon, Dec 19, 2022 at 11:46:35PM +0000, Mike Leach wrote:
> Add in functionality and binary attribute to load and unload
> configurations as binary data.
> 
> Files are loaded via the 'load' binary attribute. System reads the incoming
> file, which must be formatted correctly as defined in the file reader code.
> This will create configuration(s) and/or feature(s) and load them
> into the system.

Binary attributes are intended to pass things such as firmware
through.  Defining your own structured file format seems like a
major abuse of the configfs design.  What's the advantage of this
over simply using an ioctl?