linux-kernel - Re: [PATCH] ubifs: Fix O_TMPFILE corner case in ubifs

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Message-ID: <CAOQ4uxhaYfO3m6kQ1agDg2Bm-6Xh9yxoPh93m=xpTz39gXjpAQ@mail.gmail.com>
Date:   Tue, 11 Apr 2017 13:20:13 +0300
From:   Amir Goldstein <amir73il@...il.com>
To:     Richard Weinberger <richard@....at>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        linux-mtd@...ts.infradead.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Artem Bityutskiy <dedekind1@...il.com>,
        "stable [v4.9]" <stable@...r.kernel.org>,
        Ralph Sennhauser <ralph.sennhauser@...il.com>
Subject: Re: [PATCH] ubifs: Fix O_TMPFILE corner case in ubifs_link()

On Thu, Apr 6, 2017 at 3:26 PM, Richard Weinberger <richard@....at> wrote:
> Am 06.04.2017 um 14:09 schrieb Richard Weinberger:
>>> Were you able to make any progress? still working on this?
>>> If this is too complicated to get in for this cycle, better send a patch
>>> to disable O_TMPFILE support for ubifs and fix the problem properly on
>>> followup merge cycle.
>>> Because right now ubifs O_TMPFILE support is broken and breaks overlayfs mount.
>>
>> I have a test and currently testing it. As it looks the situation is less worse
>> than I thought first. :-)
>
> s/test/patch :)
>

Richard,

Maybe it's not my business to interfere with ubifs development and I
haven't seen your patch.

But on the face of it, it doesn't sound like fixing O_TMPFILE is a
trivial fix, so not sure
it is wise to send a patch for -rc7?...

How about sending the patch to disable O_TMPFILE for -rc7 and queuing
your fix for v4.12?
Without any patch, v4.11 is going to have a regression with overlayfs+ubifs.

Amir.