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DateSat, 19 May 2001 19:31:35 -0400
FromJeff Garzik <>
SubjectRe: Why side-effects on open(2) are evil. (was Re: [RFD w/info-PATCH]device arguments from lookup)
Are we talking about device arguments just for chrdevs and blkdevs? 
(ie. drivers)  or for regular files too?

Speaking about drivers specifically, a controlling miscdev, one per
device or one per group of devices depending on your needs, is a much
more clean solution for passing ioctl-type data.  You are free to come
up with whatever method of communication with the driver is most
efficient for your needs -- without perverting open(2).

Notice also a "metadata miscdev" solves the problem of passing options
on open -- just pass those options to the miscdev before you open it...

metadata miscdevs are a clean solution to what procfs hacks and ioctls
are trying to accomplish.

	Jeff


-- 
Jeff Garzik      | "Do you have to make light of everything?!"
Building 1024    | "I'm extremely serious about nailing your
MandrakeSoft     |  step-daughter, but other than that, yes."
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