Re: bus:id:lun to device name

[Stefan Voelkel <Stefan.Voelkel@millenux.com>]

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On Tue, 2003-07-08 at 16:50, Kurt Garloff wrote:
> Hi Stefan,
> 
> On Wed, Jul 02, 2003 at 05:24:08PM +0200, Stefan Voelkel wrote:
> > I want to convert a bus:id:lun triple to something like "/dev/sda".
> > 
> > From userspace I can ioctl() /dev/s[d|cd|...]* or parse /proc/scsi/scsi.
> 
> Plain /proc/scsi/scsi does not help you.
> You may want to have a lok at the scsi-many patches that export this
> information via /proc/scsi/scsi though.
> http://www.suse.de/~garloff/linux/scsi-many/

I can not patch the middle layer.

> Host: scsi3 Channel: 00 Id: 10 Lun: 00
>   Vendor: IBM      Model: DDYS-T18350N     Rev: S84D
>   Type:   Direct-Access                    ANSI SCSI revision: 03
>   Attached drivers: sde(b:08:40) sg5(c:15:05)
> 
> > I do not like any of those solutions.
> 
> For non-removable harddisks, the ioctl() just works fine, BTW.
> I see no reason to dislike it.

Theoretically /dev/foobar might be a scsi device, meaning that I
must/should ioctl() all files under /dev/. Thats what I do not like
about ioctl() :).

> Another option is to use scsidev
> http://www.garloff.de/kurt/linux/scsidev/
> where the device nodes are dynamically created and (by default) have 
> names which contain this information.

AFAIR devfs does this too, depending on devfs would be an option.

regards
	Stefan
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Stefan Völkel                            stefan.voelkel@millenux.com
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