Re: [PATCH] 2.5.14 IDE 56

From: Richard Gooch (
Date: Tue May 07 2002 - 12:43:35 EST

Linus Torvalds writes:
> On Tue, 7 May 2002 wrote:
> >
> > One interesting thing here would be to have some optional link between
> > the bus-oriented device tree and the function-oriented tree (ie. devfs
> > or simply /dev).
> There isn't any 1:1 thing - the device/bus-oriented one should _not_
> show virtual things like partitions etc that have no relevance for a
> driver, while /dev (and thus devfs) obviously think that that is the
> important part, much more important than how we actually got to the
> device.

Actually, I've always said that I think devfs should care about both
views. And that's why I think putting the driver tree (ala driverfs)
in devfs, and making the device-oriented part of the tree be symlinks
into the bus-oriented tree, is a good idea.

> I think we need to have some way of getting a mapping from /dev ->
> devicefs, but I don't think that has to be a filesystem thing (it
> might even be as simple as just one ioctl or new system call: 'get
> the "path" of this device').

Fugly. What's wrong with readlink(2) as this "magic syscall"?


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