Re: devd limitations / automounting removable storage

From: Robert Watson (rwatson_at_freebsd.org)
Date: 09/18/03

  • Next message: M. Warner Losh: "Re: devd limitations / automounting removable storage" 
    Date: Thu, 18 Sep 2003 10:47:48 -0400 (EDT)
To: "M. Warner Losh" <imp@bsdimp.com>

    On Thu, 18 Sep 2003, M. Warner Losh wrote:

    > In message: <1063881095.12179.5.camel@builder02.qubesoft.com>
    > Doug Rabson <dfr@nlsystems.com> writes:
    > : Surely the right thing would be to use the same wheel (newbus) for all
    > : the probing, driver auction, device attachment jobs in the kernel. That
    > : would seemlessly allow devd to receive device notification events for
    > : geom's leaf partitions in exactly the same way that it receives all
    > : other notification events.
    >
    > I tend to agree with the CAM/ata controller bit. Both were written
    > before newbus was well integrated into the tree. It makes no sense that
    > fdc has an fd newbus child but ata doesn't have an ad child.
    >
    > However, having said that, I think we do need additional event types
    > because we're doing with different name spaces. But those events might
    > be in devd rather than devctl given that we can get those events in
    > userland in other ways if my investigations are OK.

    For ifnet events, we can use routing sockets. I don't know that we have
    GEOM events as yet. One reason to separately handle GEOM from devfs would
    be that GEOM "objects" tend to be storage devices or related notions,
    whereas devfs entries could be any number of things.

    Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
    robert@fledge.watson.org Network Associates Laboratories

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