Re: [Qemu-devel] [PATCH v7 0/3] 9p: Fix file ID collisions

[Christian Schoenebeck]

On Freitag, 13. September 2019 19:01:57 CEST Greg Kurz wrote:
> So I did some changes in 1/3 and pushed everything to 9p-next. 

I've reviewed your changes. Some notes:

Patch 1:
https://github.com/gkurz/qemu/commit/9295011c5a961603959b966c8aa6ad9840fe6db2

* Typo 1:

        error_append_hint(&local_err, "Valide options are: multidevs="

        Valide -> Valid

* Typo 2 in log comment:

        [groug: - Moved "multidevs" parsing the local backend.
        ->
        [groug: - Moved "multidevs" parsing to the local backend.

> I'll do some
> more manual testing and issue a PR when I'm confident enough.

That would be highly appreciated! So far I am the only one ever having tested 
this patch set at all!

> It would be nice to have some sort of automated test for that in 'make
> check'. My first thought is to simulate a cross-device setup with the synth
> backend, because it might be difficult to do this on a real filesystem
> without requiring elevated privileges.

Hmm, since I neither haven't used the synth backend before, nor added qemu 
test cases so far, I am yet missing the complete picture here. My initial 
suggested approach would have been using loopback devices for simulating two 
file systems, but yes that's probably not viable due to required permissions. 
How would the synth backend help here? I mean you would need to simulate 
specific inode numbers and device numbers in some way for the test cases.