linux-kernel - Re: [V9fs-developer] [PATCH RFC 0/4] 9p: fix open-unlink-f*syscall bug

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Date:   Mon, 14 Sep 2020 17:46:30 +0200
From:   Greg Kurz <groug@...d.org>
To:     Christian Schoenebeck <qemu_oss@...debyte.com>
CC:     Jianyong Wu <jianyong.wu@....com>, <ericvh@...il.com>,
        <lucho@...kov.net>, <asmadeus@...ewreck.org>,
        <v9fs-developer@...ts.sourceforge.net>, <justin.he@....com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [V9fs-developer] [PATCH RFC 0/4] 9p: fix open-unlink-f*syscall
 bug

On Mon, 14 Sep 2020 17:19:20 +0200
Christian Schoenebeck <qemu_oss@...debyte.com> wrote:

> On Montag, 14. September 2020 14:43:25 CEST Greg Kurz wrote:
> > > So yes, looks like this also requires changes to the 9pfs 'local' fs
> > > driver on QEMU side:
> > > https://lists.nongnu.org/archive/html/qemu-devel/2016-06/msg07586.html
> > > 
> > > Eric, Greg, would there be an easy way to establish QEMU test cases
> > > running
> > > the 9pfs 'local' fs driver? Right now we only have 9pfs qtest cases for
> > > QEMU which can only use the 'synth' driver, which is not helpful for such
> > > kind of issues.
> > 
> > I guess it's possible to introduce new qtests that start QEMU with
> > -fsdev local instead of -fsdev synth... I haven't looked in a while
> > though, so I won't comment on "easy way" ;-)
> 
> Makes sense, and I considered that approach as well.
> 
> The question is the following: is there a QEMU policy about test cases that 
> create/write/read/delete *real* files? I.e. should those test files be written 
> to a certain location, and are there measures of sandboxing required?
> 

I don't know. You'll need to figure out by yourself, reading code from
other tests or asking on IRC.

> Best regards,
> Christian Schoenebeck
> 
>