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Message-ID: <bf452f47-8874-09a9-2d74-6a2ad5bea215@suse.com>
Date: Wed, 1 Feb 2023 07:37:04 +0100
From: Juergen Gross <jgross@...e.com>
To: Simon Horman <simon.horman@...igine.com>
Cc: linux-kernel@...r.kernel.org, v9fs-developer@...ts.sourceforge.net,
netdev@...r.kernel.org, Eric Van Hensbergen <ericvh@...il.com>,
Latchesar Ionkov <lucho@...kov.net>,
Dominique Martinet <asmadeus@...ewreck.org>,
Christian Schoenebeck <linux_oss@...debyte.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH 1/2] 9p/xen: fix version parsing
On 31.01.23 19:48, Simon Horman wrote:
> On Mon, Jan 30, 2023 at 12:30:35PM +0100, Juergen Gross wrote:
>> When connecting the Xen 9pfs frontend to the backend, the "versions"
>> Xenstore entry written by the backend is parsed in a wrong way.
>>
>> The "versions" entry is defined to contain the versions supported by
>> the backend separated by commas (e.g. "1,2"). Today only version "1"
>> is defined. Unfortunately the frontend doesn't look for "1" being
>> listed in the entry, but it is expecting the entry to have the value
>> "1".
>>
>> This will result in failure as soon as the backend will support e.g.
>> versions "1" and "2".
>>
>> Fix that by scanning the entry correctly.
>>
>> Fixes: 71ebd71921e4 ("xen/9pfs: connect to the backend")
>> Signed-off-by: Juergen Gross <jgross@...e.com>
>
> It's unclear if this series is targeted at 'net' or 'net-next'.
> FWIIW, I feel I feel it would be more appropriate for the latter
> as these do not feel like bug fixes: feel free to differ on that.
I'm fine with net-next.
Right now there is no problem with the current behavior. This will
change only in case Xen starts to support a new transport version.
For the other patch the problem would show up only if Xen starts
supporting dynamical attach/detach of 9pfs devices, which is not
the case right now.
>
> Regardless,
>
> Reviewed-by: Simon Horman <simon.horman@...igine.com>
>
Thanks,
Juergen
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