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List:       v9fs-developer
Subject:    Re: [V9fs-developer] [Qemu-devel] [Bug 1336794] Re: 9pfs does not honor open file handles on unlinke
From:       Eric Van Hensbergen <ericvh () gmail ! com>
Date:       2015-04-15 14:17:41
Message-ID: CAFkjPTmw56U+mg0RAfkWk=T8M70eD2t_WyKJp9EYxQtiL1OcUA () mail ! gmail ! com
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good to know, thanks dominique.  I gave it a sniff test with FSX and a few
other benchmarks, but I need to hit it with some multithreaded
regressions.  Any pointers to reproducible failure cases would be
beneficial.

On Wed, Apr 15, 2015 at 6:28 AM Dominique Martinet <
dominique.martinet@cea.fr> wrote:

> Eric Van Hensbergen wrote on Mon, Apr 13, 2015 at 04:05:28PM +0000:
> > Well, technically fid 3 isn't 'open', only fid 2 is open - at least
> > according to the protocol.  fid 3 and fid 2 are both clones of fid 1.
>
> Right, they're clone fids, but nothing in the protocol says what should
> happen to non-open fids when you unlink the file either - I guess both
> behaviours are OK as long as the client can handle it, so it would make
> sense to at least call fstat() on the fid matching the fd, but while
> I think this is how the kernel currently behaves the kernel doesn't HAVE
> to make one open, separate fid per open file descriptor either.
>
> > However, thanks for the alternative workaround.  If you get a chance, can
> > you check that my change to the client to partially fix this for the
> other
> > servers doesn't break nfs-ganesha:
> >
> >
> https://github.com/ericvh/linux/commit/fddc7721d6d19e4e6be4905f37ade5b0521f4ed5
>
> I'm afraid I haven't had much time lately, but while fstat-after-unlink
> still works I'm getting some Oops with my basic test suite (create empty
> files and rm -rf, kernel compilation, etc - nothing fancy) to the point
> of locking myself out of my test box pretty quickly.
>
> I'll try to debug patches a bit more individually (trying everything at
> once isn't helping), but at the very least something is fishy
>
> --
> Dominique Martinet
>
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