On Tue, Dec 05, 2006 at 05:47:16PM +0100, Latchesar Ionkov wrote:
quoted text
> On 12/5/06, Rob Ross <rross@mcs.anl.gov> wrote:
> >Hi,
> >
> >I agree that it is not feasible to add new system calls every time
> >somebody has a problem, and we don't take adding system calls lightly.
> >However, in this case we're talking about an entire *community* of
> >people (high-end computing), not just one or two people. Of course it
> >may still be the case that that community is not important enough to
> >justify the addition of system calls; that's obviously not my call to make!
> 
> I have the feeling that openg stuff is rushed without looking into all
> solutions, that don't require changes to the current interface.

I also get the feeling that interfaces that already do this
open-by-handle stuff haven't been explored either.

Does anyone here know about the XFS libhandle API? This has been
around for years and it does _exactly_ what these proposed syscalls
are supposed to do (and more).

See:

http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=linux&db=man&fname=/usr/sh...

For the libhandle man page. Basically:

openg == path_to_handle
sutoc == open_by_handle

And here for the userspace code:

http://oss.sgi.com/cgi-bin/cvsweb.cgi/xfs-cmds/xfsprogs/libhandle/

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group
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