Julian Elischer writes:
> >
> > Isn't this gross? Is there a better way?
>
> I think that the better way is to actually have each open have a
> different minor number.
> i.e. each process opens a different copy.
> The way to achieve this best is with cloning devices.
> apply within phk for more info :-)
Does this mean that the processes can open /dev/foo0 twice and the
driver sees a different minor number for each open? Or does it mean
that the process has to open /dev/foo0 and /dev/foo1?
If the former, that's awesome!... How do I use it?
If the latter, then it isn't practical for things like vmware and my
Giganet VI driver because both depend on closed-source userland code
which cannot be taught to open differently named special files.
> I could imagine however that you could assume that each process
> opens the device only once, and thus have a hash-table of
> private info, keyed on curproc. You should be able to store the curproc
> key with the request currently being serviced so that teh interrupt routines
> can also use the same key.
It would simplifly things, but I don't think that this is going to be
a valid assumption in general..
Thanks!
Drew
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