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    SubjectRe: [PATCH] 2.5.14 IDE 56

    Ben, what you are proposing is fairly similar to what Solaris does today.
    There is a /devices directory that contains the real path while /dev
    contains the legacy stuff. Seems to work fine and given the proper docs,
    you can decipher what the /devices path points to fairly easily. So I
    certainly wouldnt mind seeing this happen for Linux eventually.

    --Jauder

    On Tue, 7 May 2002 benh@kernel.crashing.org wrote:

    > > /driverfs/root/pci0/00:1f.4/usb_bus/000/
    > >
    > >and it wouldn't be impossible (or even necessarily very hard) to make an
    > >IDE controller export the "IDE device tree" the same way a USB controller
    > >now exports the "USB device tree".
    > >
    > >For things like hotplug etc, I think driverfs is eventually the only way
    > >to go, simply because it gives you the full (and unambiguous) path to
    > >_any_ device, and is completely bus-agnostic.
    > >
    > >But there is definitely a potential backwards-compatibility-issue.
    >
    > 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). For example, an IDE node in driverfs could eventually
    > hold symlinks to the entries it provides in /dev when using devfs (or
    > just provide major/minor when not using devfs).
    >
    > What do you think ?
    >
    > One problem I've been faced with on ppc is to be able to match
    > a linux device with what the firmware (Open Firmware) thinks that
    > device is. The firmware view is bus-centered and it would be pretty
    > easy to provide some additional entries in driverfs that give the
    > OF fullpath of a given device. But then, the link between the actual
    > driver in driverfs and the "device" as used by, for example, the
    > filesystem isn't trivial.
    >
    > Ben.
    >
    >
    >
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