linux-kernel - Re: [PATCH] fs: fix possible inconsistent mount device

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Message-ID: <230cf303-b241-957d-f5aa-5d367eddeb3f@huaweicloud.com>
Date:   Sat, 13 Aug 2022 15:09:58 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     Christoph Hellwig <hch@...radead.org>,
        Yu Kuai <yukuai1@...weicloud.com>
Cc:     viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        yi.zhang@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH] fs: fix possible inconsistent mount device

Hi, Christoph!

在 2022/08/13 14:48, Christoph Hellwig 写道:
> On Sat, Aug 13, 2022 at 02:08:48PM +0800, Yu Kuai wrote:
>> From: Yu Kuai <yukuai3@...wei.com>
>>
>> If device support rename, for example dm, following concurrent scenario
>> is possible:
> 
> The fix is easy:  don't rename mounted block device, and even
> bettersimply don't rename them at all, which is just causing huge
> amounts of pain.

Thanks for your reply. Do you think it's better to remove the rename
support from dm? Or it's better to add such limit?

Best regards,
Kuai