linux-kernel - Re: /dev/sd*

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Message-ID: <20060819001523.GA6440@boogie.lpds.sztaki.hu>
Date:	Sat, 19 Aug 2006 02:15:23 +0200
From:	Gabor Gombas <gombasg@...aki.hu>
To:	Bill Davidsen <davidsen@....com>
Cc:	Seewer Philippe <philippe.seewer@....ch>,
	Jeff Garzik <jeff@...zik.org>, Adrian Bunk <bunk@...sta.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: /dev/sd*

On Fri, Aug 18, 2006 at 08:45:38AM -0400, Bill Davidsen wrote:

> For discussion I suggest /proc/ata/devices, a single flat file matching 
> a name meaningful to open() with a vendor string and whatever other info 
> is handy, like serial number and the like.

Why just ATA? Let it contain all disk-like devices in the system, and
add an extra field showing the transport method
(IDE/USB/SCSI/SATA/whatever) the device is currently using.

Hmm, /sys/block already contains all the kernel-internal device names,
/sys/block/*/device already gives the physical location. We might just
need a couple additional attributes (like "serial") for user
convenience, and a little shell script that walks /sys/block and emits
an unified device list?

Alternatively, the shell scipt could use blktool to collect the data not
already present under /sys/block, so there would be no need to modify
the kernel at all. blktool could be modified to accept a path name under
/sys/block as well as a device node, and print some more data the serial
number when using the "id" command, but I think that's doable.

Gabor

-- 
     ---------------------------------------------------------
     MTA SZTAKI Computer and Automation Research Institute
                Hungarian Academy of Sciences
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