linux-kernel - Re: [f2fs-dev] [PATCH 3/6] f2fs: do not expose unwritten blocks to user by DIO

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Message-ID: <a2036978-81f9-fad4-90ce-15dadf048693@kernel.org>
Date:   Wed, 5 Jan 2022 21:19:12 +0800
From:   Chao Yu <chao@...nel.org>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 3/6] f2fs: do not expose unwritten blocks to
 user by DIO

On 2022/1/5 5:24, Jaegeuk Kim wrote:
> DIO preallocates physical blocks before writing data, but if an error occurrs
> or power-cut happens, we can see block contents from the disk. This patch tries
> to fix it by 1) turning to buffered writes for DIO into holes, 2) truncating
> unwritten blocks from error or power-cut.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,