Re: possible change to usb.agent

[David Brownell <david-b@pacbell.net>]

> Obviously you know what you're talking about, and it indeed works
> great if I simply link my script in as "/etc/hotplug/usb/usb-storage".
> Just to be safe I'm put in a test to exit if the $PRODUCT not equal to
> '4cb/100/100'.

It might be more easily extended if that's "case $PRODUCT in ...",
which I do in some other cases (firmware downloading).  FWIW, I
think it's fair to say that SCSI hotplugging will be evolving a bunch
in the 2.5 tree ... and that such handling may well belong there,
rather than at the USB level!


> I can see this approach works great now, but I do wonder what happens
> when I get an rpm that installs scripts for my MP3 player, Camera, and
> external harddrive.   I thought that was the idea behind the
> "usb.usermap" file and all the matching options.  

No, the original intent was to support user mode drivers ("usermap").
With as few match options as practical -- since options create support
problems/costs.  (Options lead to confusion ... ;)

Could you clarify why you'd expect those different kinds of usb-storage
device to get treated differently?  I suspect I know why -- and it'll boil
down to wanting SCSI hotplug to have access to more information
in order to mount cameras under something like /mnt/camera/N and
MP3 players under /mnt/mp3/N, and handle CD/DVD burners in a
correspondingly intelligent way.


>    The way I had
> changed it the device driver would load as well as anything matching
> in the usb.usermap file.  It allowed individual and multiple scripts
> per device.

I think the current scheme also allows that, but doesn't try to standardize
any of it.  Most of the cases I can imagine where a standard approach
would be needed feel to me like cases where higher level hotplug tools
(printer, scanner/sane, scsi, etc) should handle the problem.  Given that,
I'm reluctant to encourage USB-level solutions, only to replace them when
the more capable solutions appear.

- Dave



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