Re: [RFD w/info-PATCH] device arguments from lookup, partion code inuserspace

From: Alexander Viro (viro@math.psu.edu)
Date: Sat May 19 2001 - 04:32:06 EDT

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    On Sat, 19 May 2001, Ben LaHaise wrote:

    > On Sat, 19 May 2001, Alexander Viro wrote:
    >
    > > On Sat, 19 May 2001, Ben LaHaise wrote:
    > >
    > > > It's not done yet, but similar techniques would be applied. I envision
    > > > that a raid device would support operations such as
    > > > open("/dev/md0/slot=5,hot-add=/dev/sda")
    > >
    > > Think for a moment and you'll see why it's not only ugly as hell, but simply
    > > won't work.
    >
    > Yeah, I shouldn't be replying to email anymore in my bleery-eyed state.
    > =) Of course slash seperated data doesn't work, so it would have to be
    > hot-add=<filedescriptor> or somesuch. Gah, that's why the options are all
    > parsed from a single lookup name anyways...

    That's why you want to use write(2) to pass that information instead of
    encoding it into open(2).

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