linux-kernel - Re: [PATCH v2] fs: fix lost error code in dio

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Message-ID: <20181130104620.GA26765@lst.de>
Date:   Fri, 30 Nov 2018 11:46:20 +0100
From:   Christoph Hellwig <hch@....de>
To:     Maximilian Heyne <mheyne@...zon.de>
Cc:     Christoph Hellwig <hch@....de>, Torsten Mehlan <tomeh@...zon.de>,
        Uwe Dannowski <uwed@...zon.de>, Amit Shah <aams@...zon.de>,
        David Woodhouse <dwmw@...zon.co.uk>, stable@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        axboe@...nel.dk
Subject: Re: [PATCH v2] fs: fix lost error code in dio_complete

Al, Jens,

can someone pick this up, please?

On Fri, Nov 30, 2018 at 10:02:22AM +0100, Maximilian Heyne wrote:
> On 11/8/18 7:58 PM, Maximilian Heyne wrote:
>> commit e259221763a40403d5bb232209998e8c45804ab8 ("fs: simplify the
>> generic_write_sync prototype") reworked callers of generic_write_sync(),
>> and ended up dropping the error return for the directio path. Prior to
>> that commit, in dio_complete(), an error would be bubbled up the stack,
>> but after that commit, errors passed on to dio_complete were eaten up.
>>
>> This was reported on the list earlier, and a fix was proposed in
>> https://lore.kernel.org/lkml/20160921141539.GA17898@infradead.org/, but
>> never followed up with.  We recently hit this bug in our testing where
>> fencing io errors, which were previously erroring out with EIO, were
>> being returned as success operations after this commit.
> I just wanted to follow up on this. Has anyone picked up this patch?
>
>
>
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