Re: Which node has the device been bound to?

[Greg KH <greg@kroah.com>]

On Mon, Jun 03, 2002 at 11:09:36PM +0200, Oliver Neukum wrote:
> > But what is the real problem here?  What do you want to solve?  Mapping
> > of a /dev node to a physical device?  Or mapping of a physical device to
> > a /dev node?  Or something else?
> 
> The former. The latter has some principal problems.
> To do the former you need to have an atomic operation on an
> opened device.
> Thus you need to have the device node open and you need
> the ioctl to not return a pointer to a driverfs file. You either return
> its content or an fd.

Ok, I understand a bit better now (sorry, I'm slow today...).  So what
fd do you want returned in the ioctl()?  driverfs implements a tree for
every device, not a single file.  Do you want a fd for the directory?

thanks,

greg k-h

_______________________________________________________________

Don't miss the 2002 Sprint PCS Application Developer's Conference
August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm

_______________________________________________
Linux-hotplug-devel mailing list  http://linux-hotplug.sourceforge.net
Linux-hotplug-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel