Re: devices with more than one node

[Greg KH <greg@kroah.com>]

On Tue, Jan 13, 2004 at 03:01:47PM -0800, Patrick Mansfield wrote:
> Don't forget to let the scsi people know ;-) cc-ing linux-scsi

Ok, here goes:

linux-scsi, DO NOT USE THE cdev sysfs directory.  It will be going away
as soon as I get around to writing the patch for it.  Putting the sg
symlink in there is not the proper place.

For scsi generic you should create a scsi generic class (scsi_generic?)
and create the individual sg devices in that directory (feel free to use
the simple_class.c code that is currently in the -mm tree if you want,
it makes it much simpler)

> st also needs changes.

I agree.

> Did anyone figure out how udev should handle the one tape device requiring
> multiple minors (for open/close with/without rewind)? It really is a
> single device requiring multiple dev entries.

Create multiple class_device items for every tape device and have the
device symlink point to the same scsi device.  The simple_class code
should make life a lot easier for you.

> For scsi_id support with udev, st needs to support SG_IO, AFAIUI it can
> use similiar code as found in sd.c and sr.c.

That's a scsi core issue, not a udev issue :)

thanks,

greg k-h


-------------------------------------------------------
This SF.net email is sponsored by: Perforce Software.
Perforce is the Fast Software Configuration Management System offering
advanced branching capabilities and atomic changes on 50+ platforms.
Free Eval! http://www.perforce.com/perforce/loadprog.html