On Saturday 26 July 2003 20:50, Greg KH wrote:
> On Sat, Jul 26, 2003 at 08:36:13PM +0400, Andrey Borzenkov wrote:
> > So apparently I cannot rely on sysfs to get reliable persistent
> > information about physical location of devices.
>
> That is correct, but you can get pretty close :)
>
sure, I know. The more annoying is how difficult is to step over this "close"
:)
> > the point is - I want to create aliases that would point to specific
> > slots. I.e. when I plug USB memory stick in upper slot on front panel I'd
> > like to always create the same device alias for it.
>
> Look at the udev announcement I posted to linux-kernel yesterday to see
> how to do this.
>
I know udev.
udev does not answer my question. It operates on logical device (bus) numbers.
My question was how to name devices based on physical position
*independently* of logical numbers they get.
It is not strictly speaking udev fault but simply result of kernel exporting
logical device names instead of true physical paths. I miss Solaris /devices
filesystem ...
OK I may mot see something obvious. Simple example.
I have SCSI HBA sitting in PCI slot 3. It gets SCSI host number 1. I configure
udev to name SCSI device 1.0.0.1 "database"
I add one more SCSI HBA in PCI slot 1. Next time system is booted *this* gets
SCSI host number 1 and my first HBA in slot 3 gets SCSI host 2. Oops.
Question: how to configure udev so that "database" always refers to LUN 0 on
target 0 on bus 0 on HBA in PCI slot 1.
> thanks,
>
I thank you
-andrey
PS this obviously applies not only to SCSI. It is just it is most simple
example and you do not open network interfaces by name so there is *no* way
at all to assign their numbers :(
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Jul 31 2003 - 22:00:36 EST