linux-kernel - Re: [PATCH] f2fs: fix fdatasync

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Message-ID: <20161116121538.GA22373@infradead.org>
Date:   Wed, 16 Nov 2016 04:15:38 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     jaegeuk@...nel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, chao@...nel.org
Subject: Re: [PATCH] f2fs: fix fdatasync

On Wed, Nov 16, 2016 at 08:12:11PM +0800, Chao Yu wrote:
> For below two cases, we can't guarantee data consistence:
> 
> a)
> 1. xfs_io "pwrite 0 4195328" "fsync"
> 2. xfs_io "pwrite 4195328 1024" "fdatasync"
> 3. godown
> 4. umount & mount
> --> isize we updated before fdatasync won't be recovered
> 
> b)
> 1. xfs_io "pwrite -S 0xcc 0 4202496" "fsync"
> 2. xfs_io "fpunch 4194304 4096" "fdatasync"
> 3. godown
> 4. umount & mount
> --> dnode we punched before fdatasync won't be recovered

Can you please add testcases for these to xfstests?