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

[Alexander Viro]

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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